// task execution code
void SCHED_zpotrf(Quark* quark)
{
magma_int_t UPPER;
magma_int_t N;
cuDoubleComplex *A;
magma_int_t LDA;
magma_int_t *iinfo;
magma_int_t info;
quark_unpack_args_5(quark, UPPER, N, A, LDA, iinfo);
if (UPPER) {
lapackf77_zpotrf(MagmaUpperStr, &N, A, &LDA, &info);
} else {
lapackf77_zpotrf(MagmaLowerStr, &N, A, &LDA, &info);
}
if (info > 0) {
iinfo[1] = iinfo[0] + info;
}
}
/**
Purpose
-------
ZPOTRF computes the Cholesky factorization of a complex Hermitian
positive definite matrix dA.
The factorization has the form
dA = U**H * U, if UPLO = MagmaUpper, or
dA = L * L**H, if UPLO = MagmaLower,
where U is an upper triangular matrix and L is lower triangular.
This is the block version of the algorithm, calling Level 3 BLAS.
This version assumes the computation runs through the NULL stream
and therefore is not overlapping some computation with communication.
Arguments
---------
@param[in]
uplo magma_uplo_t
- = MagmaUpper: Upper triangle of dA is stored;
- = MagmaLower: Lower triangle of dA is stored.
@param[in]
n INTEGER
The order of the matrix dA. N >= 0.
@param[in,out]
dA COMPLEX_16 array on the GPU, dimension (LDDA,N)
On entry, the Hermitian matrix dA. If UPLO = MagmaUpper, the leading
N-by-N upper triangular part of dA contains the upper
triangular part of the matrix dA, and the strictly lower
triangular part of dA is not referenced. If UPLO = MagmaLower, the
leading N-by-N lower triangular part of dA contains the lower
triangular part of the matrix dA, and the strictly upper
triangular part of dA is not referenced.
\n
On exit, if INFO = 0, the factor U or L from the Cholesky
factorization dA = U**H * U or dA = L * L**H.
@param[in]
ldda INTEGER
The leading dimension of the array dA. LDDA >= max(1,N).
To benefit from coalescent memory accesses LDDA must be
divisible by 16.
@param[out]
info INTEGER
- = 0: successful exit
- < 0: if INFO = -i, the i-th argument had an illegal value
- > 0: if INFO = i, the leading minor of order i is not
positive definite, and the factorization could not be
completed.
@ingroup magma_zposv_comp
********************************************************************/
extern "C" magma_int_t
magma_zpotrf_gpu(magma_uplo_t uplo, magma_int_t n,
magmaDoubleComplex *dA, magma_int_t ldda, magma_int_t *info)
{
#define dA(i, j) (dA + (j)*ldda + (i))
magma_int_t j, jb, nb;
const char* uplo_ = lapack_uplo_const( uplo );
magmaDoubleComplex c_one = MAGMA_Z_ONE;
magmaDoubleComplex c_neg_one = MAGMA_Z_NEG_ONE;
magmaDoubleComplex *work;
double d_one = 1.0;
double d_neg_one = -1.0;
int upper = (uplo == MagmaUpper);
*info = 0;
if (! upper && uplo != MagmaLower) {
*info = -1;
} else if (n < 0) {
*info = -2;
} else if (ldda < max(1,n)) {
*info = -4;
}
if (*info != 0) {
magma_xerbla( __func__, -(*info) );
return *info;
}
nb = magma_get_zpotrf_nb(n);
if (MAGMA_SUCCESS != magma_zmalloc_pinned( &work, nb*nb )) {
*info = MAGMA_ERR_HOST_ALLOC;
return *info;
}
magma_queue_t stream[2];
magma_queue_create( &stream[0] );
magma_queue_create( &stream[1] );
if ((nb <= 1) || (nb >= n)) {
/* Use unblocked code. */
magma_zgetmatrix( n, n, dA, ldda, work, n );
lapackf77_zpotrf(uplo_, &n, work, &n, info);
magma_zsetmatrix( n, n, work, n, dA, ldda );
}
else {
/* Use blocked code. */
if (upper) {
/* Compute the Cholesky factorization A = U'*U. */
for (j=0; j < n; j += nb) {
/* Update and factorize the current diagonal block and test
for non-positive-definiteness. Computing MIN */
jb = min(nb, (n-j));
magma_zherk(MagmaUpper, MagmaConjTrans, jb, j,
d_neg_one, dA(0, j), ldda,
d_one, dA(j, j), ldda);
magma_zgetmatrix_async( jb, jb,
dA(j, j), ldda,
work, jb, stream[1] );
if ( (j+jb) < n) {
/* Compute the current block row. */
magma_zgemm(MagmaConjTrans, MagmaNoTrans,
jb, (n-j-jb), j,
c_neg_one, dA(0, j ), ldda,
dA(0, j+jb), ldda,
c_one, dA(j, j+jb), ldda);
}
magma_queue_sync( stream[1] );
lapackf77_zpotrf(MagmaUpperStr, &jb, work, &jb, info);
magma_zsetmatrix_async( jb, jb,
work, jb,
dA(j, j), ldda, stream[0] );
if (*info != 0) {
*info = *info + j;
break;
}
if ( (j+jb) < n) {
magma_ztrsm( MagmaLeft, MagmaUpper, MagmaConjTrans, MagmaNonUnit,
jb, (n-j-jb),
c_one, dA(j, j ), ldda,
dA(j, j+jb), ldda);
}
}
}
else {
//=========================================================
// Compute the Cholesky factorization A = L*L'.
for (j=0; j < n; j += nb) {
// Update and factorize the current diagonal block and test
// for non-positive-definiteness. Computing MIN
jb = min(nb, (n-j));
magma_zherk(MagmaLower, MagmaNoTrans, jb, j,
d_neg_one, dA(j, 0), ldda,
d_one, dA(j, j), ldda);
magma_zgetmatrix_async( jb, jb,
dA(j, j), ldda,
work, jb, stream[1] );
if ( (j+jb) < n) {
magma_zgemm( MagmaNoTrans, MagmaConjTrans,
(n-j-jb), jb, j,
c_neg_one, dA(j+jb, 0), ldda,
dA(j, 0), ldda,
c_one, dA(j+jb, j), ldda);
}
magma_queue_sync( stream[1] );
lapackf77_zpotrf(MagmaLowerStr, &jb, work, &jb, info);
magma_zsetmatrix_async( jb, jb,
work, jb,
dA(j, j), ldda, stream[0] );
if (*info != 0) {
*info = *info + j;
break;
}
if ( (j+jb) < n) {
magma_ztrsm(MagmaRight, MagmaLower, MagmaConjTrans, MagmaNonUnit,
(n-j-jb), jb,
c_one, dA(j, j), ldda,
dA(j+jb, j), ldda);
}
}
}
}
magma_queue_destroy( stream[0] );
magma_queue_destroy( stream[1] );
magma_free_pinned( work );
return *info;
} /* magma_zpotrf_gpu */
int main( int argc, char** argv)
{
real_Double_t gflops, gpu_perf, cpu_perf, gpu_time, cpu_time;
magmaDoubleComplex *hA, *hR;
magmaDoubleComplex_ptr dA;
magma_int_t N = 0, n2, lda, ldda;
magma_int_t size[10] =
{ 1024, 2048, 3072, 4032, 5184, 6048, 7200, 8064, 8928, 10560 };
magma_int_t i, info;
magmaDoubleComplex mz_one = MAGMA_Z_NEG_ONE;
magma_int_t ione = 1;
magma_int_t ISEED[4] = {0,0,0,1};
double work[1], matnorm, diffnorm;
if (argc != 1){
for(i = 1; i<argc; i++){
if (strcmp("-N", argv[i])==0)
N = atoi(argv[++i]);
}
if (N>0) size[0] = size[9] = N;
else exit(1);
}
else {
printf("\nUsage: \n");
printf(" testing_zpotrf_gpu -N %d\n\n", 1024);
}
/* Initialize */
magma_queue_t queue;
magma_device_t device;
int num = 0;
magma_err_t err;
magma_init();
err = magma_get_devices( &device, 1, &num );
if ( err != 0 || num < 1 ) {
fprintf( stderr, "magma_get_devices failed: %d\n", err );
exit(-1);
}
err = magma_queue_create( device, &queue );
if ( err != 0 ) {
fprintf( stderr, "magma_queue_create failed: %d\n", err );
exit(-1);
}
/* Allocate memory for the largest matrix */
N = size[9];
n2 = N * N;
ldda = ((N+31)/32) * 32;
TESTING_MALLOC( hA, magmaDoubleComplex, n2 );
TESTING_MALLOC_HOST( hR, magmaDoubleComplex, n2 );
TESTING_MALLOC_DEV( dA, magmaDoubleComplex, ldda*N );
printf("\n\n");
printf(" N CPU GFlop/s (sec) GPU GFlop/s (sec) ||R_magma-R_lapack||_F / ||R_lapack||_F\n");
printf("========================================================================================\n");
for(i=0; i<10; i++){
N = size[i];
lda = N;
n2 = lda*N;
ldda = ((N+31)/32)*32;
gflops = FLOPS( (double)N ) * 1e-9;
/* Initialize the matrix */
lapackf77_zlarnv( &ione, ISEED, &n2, hA );
/* Symmetrize and increase the diagonal */
for( int i = 0; i < N; ++i ) {
MAGMA_Z_SET2REAL( hA(i,i), MAGMA_Z_REAL(hA(i,i)) + N );
for( int j = 0; j < i; ++j ) {
hA(i, j) = MAGMA_Z_CNJG( hA(j,i) );
}
}
lapackf77_zlacpy( MagmaFullStr, &N, &N, hA, &lda, hR, &lda );
/* Warm up to measure the performance */
magma_zsetmatrix( N, N, hA, 0, lda, dA, 0, ldda, queue );
magma_zpotrf_gpu( MagmaUpper, N, dA, 0, ldda, &info, queue );
/* ====================================================================
Performs operation using MAGMA
=================================================================== */
magma_zsetmatrix( N, N, hA, 0, lda, dA, 0, ldda, queue );
gpu_time = get_time();
magma_zpotrf_gpu( MagmaUpper, N, dA, 0, ldda, &info, queue );
gpu_time = get_time() - gpu_time;
if (info != 0)
printf( "magma_zpotrf had error %d.\n", info );
gpu_perf = gflops / gpu_time;
/* =====================================================================
Performs operation using LAPACK
=================================================================== */
cpu_time = get_time();
lapackf77_zpotrf( MagmaUpperStr, &N, hA, &lda, &info );
cpu_time = get_time() - cpu_time;
if (info != 0)
printf( "lapackf77_zpotrf had error %d.\n", info );
cpu_perf = gflops / cpu_time;
/* =====================================================================
Check the result compared to LAPACK
|R_magma - R_lapack| / |R_lapack|
=================================================================== */
magma_zgetmatrix( N, N, dA, 0, ldda, hR, 0, lda, queue );
matnorm = lapackf77_zlange("f", &N, &N, hA, &lda, work);
blasf77_zaxpy(&n2, &mz_one, hA, &ione, hR, &ione);
diffnorm = lapackf77_zlange("f", &N, &N, hR, &lda, work);
printf( "%5d %6.2f (%6.2f) %6.2f (%6.2f) %e\n",
N, cpu_perf, cpu_time, gpu_perf, gpu_time, diffnorm / matnorm );
if (argc != 1)
break;
}
/* clean up */
TESTING_FREE( hA );
TESTING_FREE_HOST( hR );
TESTING_FREE_DEV( dA );
magma_queue_destroy( queue );
magma_finalize();
}
extern "C" magma_err_t
magma_zpotrf2_msub(int num_subs, int num_gpus, magma_uplo_t uplo, magma_int_t m, magma_int_t n,
magma_int_t off_i, magma_int_t off_j, magma_int_t nb,
magmaDoubleComplex_ptr *d_lA, size_t d_lA_offset, magma_int_t ldda,
magmaDoubleComplex_ptr *d_lP, magma_int_t lddp,
magmaDoubleComplex *a, magma_int_t lda, magma_int_t h,
magma_int_t *info, magma_queue_t *queues )
{
/* -- clMAGMA (version 1.1.0) --
Univ. of Tennessee, Knoxville
Univ. of California, Berkeley
Univ. of Colorado, Denver
@date January 2014
Purpose
=======
ZPOTRF computes the Cholesky factorization of a complex Hermitian
positive definite matrix dA.
The factorization has the form
dA = U**H * U, if UPLO = 'U', or
dA = L * L**H, if UPLO = 'L',
where U is an upper triangular matrix and L is lower triangular.
This is the block version of the algorithm, calling Level 3 BLAS.
Arguments
=========
UPLO (input) CHARACTER*1
= 'U': Upper triangle of dA is stored;
= 'L': Lower triangle of dA is stored.
N (input) INTEGER
The order of the matrix dA. N >= 0.
dA (input/output) COMPLEX_16 array on the GPU, dimension (LDDA,N)
On entry, the Hermitian matrix dA. If UPLO = 'U', the leading
N-by-N upper triangular part of dA contains the upper
triangular part of the matrix dA, and the strictly lower
triangular part of dA is not referenced. If UPLO = 'L', the
leading N-by-N lower triangular part of dA contains the lower
triangular part of the matrix dA, and the strictly upper
triangular part of dA is not referenced.
On exit, if INFO = 0, the factor U or L from the Cholesky
factorization dA = U**H * U or dA = L * L**H.
LDDA (input) INTEGER
The leading dimension of the array dA. LDDA >= max(1,N).
To benefit from coalescent memory accesses LDDA must be
dividable by 16.
INFO (output) INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value
> 0: if INFO = i, the leading minor of order i is not
positive definite, and the factorization could not be
completed.
===================================================================== */
int tot_subs = num_subs*num_gpus;
magma_int_t j, jb, nb0, nb2, dd, d, id, j_local, j_local2;
magmaDoubleComplex c_one = MAGMA_Z_ONE;
magmaDoubleComplex c_neg_one = MAGMA_Z_NEG_ONE;
double d_one = 1.0;
double d_neg_one = -1.0;
magmaDoubleComplex_ptr dlpanel;
size_t dlpanel_offset;
magma_int_t n_local[MagmaMaxSubs * MagmaMaxGPUs], ldpanel;
// initialize trace
trace_init(1, num_gpus, 2, queues);
*info = 0;
if ( (uplo != MagmaUpper) && (uplo != MagmaLower) ) {
*info = -1;
} else if (n < 0) {
*info = -2;
} else if ((uplo != MagmaUpper) && tot_subs*ldda < max(1,n)) {
*info = -4;
} else if ((uplo == MagmaUpper) && ldda < max(1,m)) {
*info = -4;
}
if (*info != 0) {
magma_xerbla( __func__, -(*info) );
return *info;
}
for (d=0; d<tot_subs; d++) {
/* local-n and local-ld */
if (uplo == MagmaUpper) {
n_local[d] = ((n/nb)/tot_subs)*nb;
if (d < (n/nb)%tot_subs)
n_local[d] += nb;
else if (d == (n/nb)%tot_subs)
n_local[d] += n%nb;
} else {
n_local[d] = ((m/nb)/tot_subs)*nb;
if (d < (m/nb)%tot_subs)
n_local[d] += nb;
else if (d == (m/nb)%tot_subs)
n_local[d] += m%nb;
}
}
/* Use blocked code. */
if (uplo == MagmaUpper) {
/* ---------------------------------------------- */
/* Upper-triangular case */
/* > Compute the Cholesky factorization A = U'*U. */
/* ---------------------------------------------- */
for (j=0; j<m; j+=nb) {
/* Set the GPU number that holds the current panel */
id = (j/nb)%tot_subs;
/* Set the local index where the current panel is */
j_local = j/(nb*tot_subs);
jb = min(nb, (m-j));
if (j > 0) {
// Wait for the column on CPU
magma_queue_sync(queues[2*(id%num_gpus)]);
/* broadcast off-diagonal column to all gpus */
d = (j/nb+1)%num_gpus;
for (dd=0; dd<num_gpus; dd++) {
if (d != id%num_gpus) {
magma_zsetmatrix_async( j, jb,
Aup_off(0,j), lda,
dlP(d,jb,0,id%num_gpus), lddp,
queues[2*d],
trace_gpu_event(d, 0, "set", "set-col") );
}
d = (d+1)%num_gpus;
}
/* Update the current diagonal block */
trace_gpu_start(id%num_gpus, 1, "herk", "herk");
magma_zherk(MagmaUpper, MagmaConjTrans, jb, j,
d_neg_one, dlA(id, 0, nb*j_local), ldda,
d_one, dlA(id, j, nb*j_local), ldda,
queues[2*(id%num_gpus)+1]);
magma_queue_sync(queues[2*(id%num_gpus)+1]); // Wait for syrk
}
/* Send the diagonal to cpu */
magma_zgetmatrix_async( jb, jb,
dlA(id, j, nb*j_local), ldda,
Aup_off(j,j), lda,
queues[2*(id%num_gpus)],
trace_gpu_event(id%num_gpus, 0, "get", "get-diag") );
if (j > 0) {
/* Compute the local block column of the panel. */
d = (j/nb+1)%tot_subs;
for (dd=0; dd<tot_subs; dd++) {
j_local2 = j_local+1;
if (d > id) j_local2 --;
nb0 = nb*j_local2;
if (n_local[d] > nb0) {
if (d%num_gpus != id%num_gpus) {
dlpanel = d_lP[d%num_gpus];
dlpanel_offset = dlP_offset(jb, 0, id%num_gpus);
ldpanel = lddp;
/* Wait for the offdiagonal column */
if (dd < num_gpus) magma_queue_sync(queues[2*(d%num_gpus)]);
} else {
dlpanel = d_lA[id];
dlpanel_offset = dlA_offset(0, nb*j_local);
ldpanel = ldda;
}
/* update the panel */
trace_gpu_start(d%num_gpus, 1, "gemm", "gemm");
magma_zgemm(MagmaConjTrans, MagmaNoTrans,
jb, n_local[d]-nb0, j,
c_neg_one, dlpanel, dlpanel_offset, ldpanel,
dlA(d, 0, nb0), ldda,
c_one, dlA(d, j, nb0), ldda,
queues[2*(d%num_gpus)+1]);
}
d = (d+1)%tot_subs;
}
}
/* factor the diagonal */
magma_queue_sync( queues[2*(id%num_gpus)] ); // wait for the diagonal
trace_cpu_start(0, "potrf", "potrf");
lapackf77_zpotrf(MagmaUpperStr, &jb, Aup(j,j), &lda, info);
trace_cpu_end(0);
if (*info != 0) {
*info = *info + j;
break;
}
/* send the diagonal to gpus */
if ((j+jb) < n) {
d = (j/nb+1)%num_gpus;
for (dd=0; dd<num_gpus; dd++) {
if (d == id%num_gpus) {
dlpanel = d_lA[id];
dlpanel_offset = dlA_offset(j, nb*j_local);
ldpanel = ldda;
} else {
dlpanel = d_lP[d];
dlpanel_offset = dlP_offset(0, 0, id%num_gpus);
ldpanel = lddp;
}
magma_zsetmatrix_async( jb, jb,
Aup_off(j,j), lda,
dlpanel, dlpanel_offset, ldpanel,
queues[2*d],
trace_gpu_event(d, 0, "set", "set-diag"));
d = (d+1)%num_gpus;
}
} else {
magma_zsetmatrix_async( jb, jb,
Aup_off(j,j), lda,
dlA(id, j, nb*j_local), ldda,
queues[2*(id%num_gpus)],
trace_gpu_event(id%num_gpus, 0, "set", "set-diag") );
}
/* panel-factorize the off-diagonal */
if ((j+jb) < n) {
d = (j/nb+1)%tot_subs;
for (dd=0; dd<tot_subs; dd++) {
/* next column */
j_local2 = j_local+1;
if (d > id) j_local2--;
if (d%num_gpus == id%num_gpus) {
dlpanel = d_lA[id];
dlpanel_offset = dlA_offset(j, nb*j_local);
ldpanel = ldda;
} else {
dlpanel = d_lP[d%num_gpus];
dlpanel_offset = dlP_offset(0, 0, id%num_gpus);
ldpanel = lddp;
}
nb2 = n_local[d]-nb*j_local2;
nb0 = min(nb, nb2);
if (dd < num_gpus) magma_queue_sync( queues[2*(d%num_gpus)] ); // wait for the diagonal
if (j+jb < m && d == (j/nb+1)%tot_subs) {
/* owns the next column, look-ahead the column */
trace_gpu_start(d%num_gpus, 1, "trsm", "trsm");
magma_ztrsm( MagmaLeft, MagmaUpper, MagmaConjTrans, MagmaNonUnit,
jb, nb0, c_one,
dlpanel, dlpanel_offset, ldpanel,
dlA(d, j, nb*j_local2), ldda,
queues[2*(d%num_gpus)+1] );
/* send the column to cpu */
magma_queue_sync(queues[2*(d%num_gpus)+1]); // wait for lookahead
magma_zgetmatrix_async( (j+jb), nb0,
dlA(d, 0, nb*j_local2), ldda,
Aup_off(0,j+jb), lda,
queues[2*(d%num_gpus)],
trace_gpu_event(d%num_gpus, 0, "get", "get-col") );
/* update the remaining blocks */
nb2 = nb2 - nb0;
trace_gpu_start(d%num_gpus, 1, "trsm", "trsm");
magma_ztrsm( MagmaLeft, MagmaUpper, MagmaConjTrans, MagmaNonUnit,
jb, nb2, c_one,
dlpanel, dlpanel_offset, ldpanel,
dlA(d, j, nb*j_local2+nb0), ldda,
queues[2*(d%num_gpus)+1] );
} else if (nb2 > 0) {
/* update the entire trailing matrix */
trace_gpu_start(d%num_gpus, 1, "trsm", "trsm");
magma_ztrsm( MagmaLeft, MagmaUpper, MagmaConjTrans, MagmaNonUnit,
jb, nb2, c_one,
dlpanel, dlpanel_offset, ldpanel,
dlA(d, j, nb*j_local2), ldda,
queues[2*(d%num_gpus)+1] );
}
d = (d+1)%tot_subs;
}
}
}
} else {
/* -------------------------------------------- */
/* Lower-triangular case */
/* Compute the Cholesky factorization A = L*L'. */
/* -------------------------------------------- */
for (j=0; j<n; j+=nb) {
/* Set the GPU number that holds the current panel */
id = (j/nb)%tot_subs;
/* Set the local index where the current panel is */
j_local = j/(nb*tot_subs);
jb = min(nb, (n-j));
if (j > 0) {
if (num_gpus > 1) {
// Wait for the row on CPU to broadcast
magma_queue_sync(queues[2*(id%num_gpus)]);
}
/* broadcast off-diagonal row to all the GPUs */
d = (j/nb+1)%num_gpus;
for (dd=0; dd<num_gpus; dd++) {
if (d != id%num_gpus) {
/* send it to GPU-d */
magma_zsetmatrix_async( jb, j,
Alo_off(j,0), lda,
dlPT(d,0,jb,id%num_gpus), nb,
queues[2*d],
trace_gpu_event(d, 0, "set", "set-row") );
}
d = (d+1)%num_gpus;
}
/* Update the current diagonal block */
trace_gpu_start(id%num_gpus, 1, "herk", "herk");
magma_zherk(MagmaLower, MagmaNoTrans, jb, j,
d_neg_one, dlA(id, nb*j_local, 0), ldda,
d_one, dlA(id, nb*j_local, j), ldda,
queues[2*(id%num_gpus)+1]);
magma_queue_sync(queues[2*(id%num_gpus)+1]); // wait for syrk
}
/* send the diagonal to cpu */
magma_zgetmatrix_async( jb, jb,
dlA(id, nb*j_local, j), ldda,
Alo_off(j,j), lda,
queues[2*(id%num_gpus)],
trace_gpu_event(id%num_gpus, 0, "get", "get") );
/* update the offdiagonal blocks */
if (j > 0) {
/* compute the block-rows of the panel */
d = (j/nb+1)%tot_subs;
for (dd=0; dd<tot_subs; dd++) {
j_local2 = j_local+1;
if (d > id) j_local2 --;
nb0 = nb*j_local2;
if (nb0 < n_local[d]) {
if (d%num_gpus != id%num_gpus) {
dlpanel = d_lP[d%num_gpus];
dlpanel_offset = dlPT_offset(0, jb, id%num_gpus);
ldpanel = nb;
/* Wait for offdiagonal row */
if (dd < num_gpus) magma_queue_sync(queues[2*(d%num_gpus)]);
} else {
dlpanel = d_lA[id];
dlpanel_offset = dlA_offset(nb*j_local, 0);
ldpanel = ldda;
}
/* Update the panel */
trace_gpu_start(d%num_gpus, 1, "gemm", "gemm");
magma_zgemm( MagmaNoTrans, MagmaConjTrans,
n_local[d]-nb0, jb, j,
c_neg_one, dlA(d, nb0, 0), ldda,
dlpanel, dlpanel_offset, ldpanel,
c_one, dlA(d, nb0, j), ldda,
queues[2*(d%num_gpus)+1]);
}
d = (d+1)%tot_subs;
}
}
/* factor the diagonal */
magma_queue_sync( queues[2*(id%num_gpus)] );
trace_cpu_start(0, "potrf", "potrf");
lapackf77_zpotrf(MagmaLowerStr, &jb, Alo(j,j), &lda, info);
trace_cpu_end(0);
if (*info != 0) {
printf( " zpotrf returned %d (id=%d,j=%d,j_local=%d,jb=%d)\n",*info,id,j,j_local,jb );
*info = *info + j;
break;
}
/* send the diagonal to gpus */
if ((j+jb) < m) {
d = (j/nb+1)%num_gpus;
for (dd=0; dd<num_gpus; dd++) {
if (d == id%num_gpus) {
dlpanel = d_lA[id];
dlpanel_offset = dlA_offset(nb*j_local, j);
ldpanel = ldda;
} else {
dlpanel = d_lP[d];
dlpanel_offset = dlPT_offset(0, 0, id%num_gpus);
ldpanel = nb;
}
magma_zsetmatrix_async( jb, jb,
Alo_off(j,j), lda,
dlpanel, dlpanel_offset, ldpanel,
queues[2*d],
trace_gpu_event(d, 0, "set", "set-diag") );
d = (d+1)%num_gpus;
}
} else {
magma_zsetmatrix_async( jb, jb,
Alo_off(j,j), lda,
dlA(id, nb*j_local, j), ldda,
queues[2*(id%num_gpus)],
trace_gpu_event(id%num_gpus, 0, "set", "set-diag") );
}
/* factorize off-diagonal blocks */
if ((j+jb) < m) {
d = (j/nb+1)%tot_subs;
for (dd=0; dd<tot_subs; dd++) {
/* next column */
j_local2 = j_local+1;
if (d > id) j_local2--;
if (d%num_gpus == id%num_gpus) {
dlpanel = d_lA[id];
dlpanel_offset = dlA_offset(nb*j_local, j);
ldpanel = ldda;
} else {
dlpanel = d_lP[d%num_gpus];
dlpanel_offset = dlPT_offset(0, 0, id%num_gpus);
ldpanel = nb;
}
nb2 = n_local[d] - j_local2*nb;
nb0 = min(nb, nb2 );
// wait for the diagonal
if (dd < num_gpus) magma_queue_sync(queues[2*(d%num_gpus)]);
if (j+jb < n && d == (j/nb+1)%tot_subs) {
/* owns the next column, look-ahead the column */
trace_gpu_start(d%num_gpus, 1, "trsm", "trsm");
magma_ztrsm( MagmaRight, MagmaLower, MagmaConjTrans, MagmaNonUnit,
nb0, jb, c_one,
dlpanel, dlpanel_offset, ldpanel,
dlA(d, nb*j_local2, j), ldda,
queues[2*(d%num_gpus)+1]);
/* send the column to cpu */
magma_queue_sync( queues[2*(d%num_gpus)+1] ); // wait for lookahead
magma_zgetmatrix_async( nb0, j+jb,
dlA(d, nb*j_local2, 0), ldda,
Alo_off(j+jb,0), lda,
queues[2*(d%num_gpus)],
trace_gpu_event(d%num_gpus, 0, "get", "get") );
/* update the remaining blocks */
nb2 = nb2 - nb0;
trace_gpu_start(d%num_gpus, 1, "trsm", "trsm");
magma_ztrsm( MagmaRight, MagmaLower, MagmaConjTrans, MagmaNonUnit,
nb2, jb, c_one,
dlpanel, dlpanel_offset, ldpanel,
dlA(d, nb*j_local2+nb0, j), ldda,
queues[2*(d%num_gpus)+1]);
} else if (nb2 > 0) {
/* update the entire trailing matrix */
trace_gpu_start(d%num_gpus, 1, "trsm", "trsm");
magma_ztrsm( MagmaRight, MagmaLower, MagmaConjTrans, MagmaNonUnit,
nb2, jb, c_one,
dlpanel, dlpanel_offset, ldpanel,
dlA(d, nb*j_local2, j), ldda,
queues[2*(d%num_gpus)+1]);
}
d = (d+1)%tot_subs;
}
}
}
} /* end of else not upper */
/* clean up */
for( d=0; d<num_gpus; d++ ) {
magma_queue_sync( queues[2*d] );
magma_queue_sync( queues[2*d+1] );
}
trace_finalize("zpotrf_msub.svg", "trace.css");
return *info;
} /* magma_zpotrf2_msub */
/* ////////////////////////////////////////////////////////////////////////////
-- Testing zpotrf_mc
*/
int main( magma_int_t argc, char** argv)
{
cuDoubleComplex *h_A, *h_R, *h_work, *h_A2;
cuDoubleComplex *d_A;
float gpu_perf, cpu_perf, cpu_perf2;
magma_timestr_t start, end;
/* Matrix size */
magma_int_t N=0, n2, lda;
magma_int_t size[10] = {1024,2048,3072,4032,5184,6048,7200,8064,8928,10080};
magma_int_t i, j, info[1];
magma_int_t ione = 1;
magma_int_t ISEED[4] = {0,0,0,1};
magma_int_t num_cores = 4;
int num_gpus = 0;
magma_int_t loop = argc;
if (argc != 1) {
for(i = 1; i<argc; i++) {
if (strcmp("-N", argv[i])==0)
N = atoi(argv[++i]);
else if (strcmp("-C", argv[i])==0)
num_cores = atoi(argv[++i]);
}
if (N==0) {
N = size[9];
loop = 1;
} else {
size[0] = size[9] = N;
}
} else {
printf("\nUsage: \n");
printf(" testing_zpotrf_mc -N %d -B 128 \n\n", 1024);
N = size[9];
}
lda = N;
n2 = size[9] * size[9];
/* Allocate host memory for the matrix */
h_A = (cuDoubleComplex*)malloc(n2 * sizeof(h_A[0]));
if (h_A == 0) {
fprintf (stderr, "!!!! host memory allocation error (A)\n");
}
/* Allocate host memory for the matrix */
h_A2 = (cuDoubleComplex*)malloc(n2 * sizeof(h_A2[0]));
if (h_A2 == 0) {
fprintf (stderr, "!!!! host memory allocation error (A2)\n");
}
/* Initialize MAGMA hardware context, seeting how many CPU cores
and how many GPUs to be used in the consequent computations */
magma_context *context;
context = magma_init(NULL, NULL, 0, num_cores, num_gpus, argc, argv);
printf("\n\n");
printf(" N Multicore GFlop/s ||R||_F / ||A||_F\n");
printf("=============================================\n");
for(i=0; i<10; i++)
{
N = lda = size[i];
n2 = N*N;
lapackf77_zlarnv( &ione, ISEED, &n2, h_A );
for(j=0; j<N; j++)
MAGMA_Z_SET2REAL( h_A[j*lda+j], ( MAGMA_Z_GET_X(h_A[j*lda+j]) + 2000. ) );
for(j=0; j<n2; j++)
h_A2[j] = h_A[j];
/* =====================================================================
Performs operation using LAPACK
=================================================================== */
//lapackf77_zpotrf("L", &N, h_A, &lda, info);
lapackf77_zpotrf("U", &N, h_A, &lda, info);
if (info[0] < 0)
printf("Argument %d of zpotrf had an illegal value.\n", -info[0]);
/* =====================================================================
Performs operation using multi-core
=================================================================== */
start = get_current_time();
//magma_zpotrf_mc(context, "L", &N, h_A2, &lda, info);
magma_zpotrf_mc(context, "U", &N, h_A2, &lda, info);
end = get_current_time();
if (info[0] < 0)
printf("Argument %d of magma_zpotrf_mc had an illegal value.\n", -info[0]);
cpu_perf2 = FLOPS( (double)N ) / (1000000.*GetTimerValue(start,end));
/* =====================================================================
Check the result compared to LAPACK
=================================================================== */
double work[1], matnorm = 1.;
cuDoubleComplex mone = MAGMA_Z_NEG_ONE;
int one = 1;
matnorm = lapackf77_zlange("f", &N, &N, h_A, &N, work);
blasf77_zaxpy(&n2, &mone, h_A, &one, h_A2, &one);
printf("%5d %6.2f %e\n",
size[i], cpu_perf2,
lapackf77_zlange("f", &N, &N, h_A2, &N, work) / matnorm);
if (loop != 1)
break;
}
/* Memory clean up */
free(h_A);
free(h_A2);
/* Shut down the MAGMA context */
magma_finalize(context);
}
/* ////////////////////////////////////////////////////////////////////////////
-- Testing zpotri
*/
int main( int argc, char** argv)
{
TESTING_INIT();
real_Double_t gflops, gpu_perf, gpu_time, cpu_perf, cpu_time;
magmaDoubleComplex *h_A, *h_R;
magmaDoubleComplex c_neg_one = MAGMA_Z_NEG_ONE;
magma_int_t N, n2, lda, info;
magma_int_t ione = 1;
magma_int_t ISEED[4] = {0,0,0,1};
double Anorm, error, work[1];
magma_int_t status = 0;
magma_opts opts;
opts.parse_opts( argc, argv );
opts.lapack |= opts.check; // check (-c) implies lapack (-l)
double tol = opts.tolerance * lapackf77_dlamch("E");
printf("%% uplo = %s\n", lapack_uplo_const(opts.uplo) );
printf("%% N CPU Gflop/s (sec) GPU Gflop/s (sec) ||R||_F / ||A||_F\n");
printf("%%================================================================\n");
for( int itest = 0; itest < opts.ntest; ++itest ) {
for( int iter = 0; iter < opts.niter; ++iter ) {
N = opts.nsize[itest];
lda = N;
n2 = lda*N;
gflops = FLOPS_ZPOTRI( N ) / 1e9;
TESTING_MALLOC_CPU( h_A, magmaDoubleComplex, n2 );
TESTING_MALLOC_PIN( h_R, magmaDoubleComplex, n2 );
/* ====================================================================
Initialize the matrix
=================================================================== */
lapackf77_zlarnv( &ione, ISEED, &n2, h_A );
magma_zmake_hpd( N, h_A, lda );
lapackf77_zlacpy( MagmaFullStr, &N, &N, h_A, &lda, h_R, &lda );
/* ====================================================================
Performs operation using MAGMA
=================================================================== */
if ( opts.warmup ) {
magma_zpotrf( opts.uplo, N, h_R, lda, &info );
magma_zpotri( opts.uplo, N, h_R, lda, &info );
lapackf77_zlacpy( MagmaFullStr, &N, &N, h_A, &lda, h_R, &lda );
}
/* factorize matrix */
magma_zpotrf( opts.uplo, N, h_R, lda, &info );
// check for exact singularity
//h_R[ 10 + 10*lda ] = MAGMA_Z_MAKE( 0.0, 0.0 );
gpu_time = magma_wtime();
magma_zpotri( opts.uplo, N, h_R, lda, &info );
gpu_time = magma_wtime() - gpu_time;
gpu_perf = gflops / gpu_time;
if (info != 0) {
printf("magma_zpotri returned error %d: %s.\n",
(int) info, magma_strerror( info ));
}
/* =====================================================================
Performs operation using LAPACK
=================================================================== */
if ( opts.lapack ) {
lapackf77_zpotrf( lapack_uplo_const(opts.uplo), &N, h_A, &lda, &info );
cpu_time = magma_wtime();
lapackf77_zpotri( lapack_uplo_const(opts.uplo), &N, h_A, &lda, &info );
cpu_time = magma_wtime() - cpu_time;
cpu_perf = gflops / cpu_time;
if (info != 0) {
printf("lapackf77_zpotri returned error %d: %s.\n",
(int) info, magma_strerror( info ));
}
/* =====================================================================
Check the result compared to LAPACK
=================================================================== */
blasf77_zaxpy(&n2, &c_neg_one, h_A, &ione, h_R, &ione);
Anorm = lapackf77_zlange("f", &N, &N, h_A, &lda, work);
error = lapackf77_zlange("f", &N, &N, h_R, &lda, work) / Anorm;
printf("%5d %7.2f (%7.2f) %7.2f (%7.2f) %8.2e %s\n",
(int) N, cpu_perf, cpu_time, gpu_perf, gpu_time,
error, (error < tol ? "ok" : "failed") );
status += ! (error < tol);
}
else {
printf("%5d --- ( --- ) %7.2f (%7.2f) ---\n",
(int) N, gpu_perf, gpu_time );
}
TESTING_FREE_CPU( h_A );
TESTING_FREE_PIN( h_R );
fflush( stdout );
}
if ( opts.niter > 1 ) {
printf( "\n" );
}
}
opts.cleanup();
TESTING_FINALIZE();
return status;
}
int main( int argc, char** argv)
{
TESTING_INIT();
real_Double_t gflops, gpu_perf, gpu_time, cpu_perf, cpu_time;
magmaDoubleComplex *h_A, *h_R;
magmaDoubleComplex *d_A;
magma_int_t N, n2, lda, ldda, info;
magmaDoubleComplex c_neg_one = MAGMA_Z_NEG_ONE;
magma_int_t ione = 1;
magma_int_t ISEED[4] = {0,0,0,1};
double work[1], error;
magma_int_t status = 0;
magmaDoubleComplex **d_A_array = NULL;
magma_int_t *dinfo_magma;
magma_int_t batchCount;
magma_queue_t queue = magma_stream;
magma_opts opts;
parse_opts( argc, argv, &opts );
opts.lapack |= opts.check; // check (-c) implies lapack (-l)
batchCount = opts.batchcount;
double tol = opts.tolerance * lapackf77_dlamch("E");
printf("BatchCount N CPU GFlop/s (ms) GPU GFlop/s (ms) ||R_magma - R_lapack||_F / ||R_lapack||_F\n");
printf("========================================================\n");
for( int i = 0; i < opts.ntest; ++i ) {
for( int iter = 0; iter < opts.niter; ++iter ) {
N = opts.nsize[i];
ldda = lda = ((N+31)/32)*32;
n2 = lda* N * batchCount;
gflops = batchCount * FLOPS_ZPOTRF( N ) / 1e9 ;
TESTING_MALLOC_CPU( h_A, magmaDoubleComplex, n2);
TESTING_MALLOC_PIN( h_R, magmaDoubleComplex, n2);
TESTING_MALLOC_DEV( d_A, magmaDoubleComplex, ldda * N * batchCount);
TESTING_MALLOC_DEV( dinfo_magma, magma_int_t, batchCount);
magma_malloc((void**)&d_A_array, batchCount * sizeof(*d_A_array));
/* Initialize the matrix */
lapackf77_zlarnv( &ione, ISEED, &n2, h_A );
for(int i=0; i<batchCount; i++)
{
magma_zmake_hpd( N, h_A + i * lda * N, lda );// need modification
}
magma_int_t columns = N * batchCount;
lapackf77_zlacpy( MagmaUpperLowerStr, &N, &(columns), h_A, &lda, h_R, &lda );
magma_zsetmatrix( N, columns, h_A, lda, d_A, ldda );
/* ====================================================================
Performs operation using MAGMA
=================================================================== */
zset_pointer(d_A_array, d_A, ldda, 0, 0, ldda * N, batchCount, queue);
gpu_time = magma_sync_wtime(NULL);
info = magma_zpotrf_batched( opts.uplo, N, d_A_array, ldda, dinfo_magma, batchCount, queue);
gpu_time = magma_sync_wtime(NULL) - gpu_time;
gpu_perf = gflops / gpu_time;
magma_int_t *cpu_info = (magma_int_t*) malloc(batchCount*sizeof(magma_int_t));
magma_getvector( batchCount, sizeof(magma_int_t), dinfo_magma, 1, cpu_info, 1);
for(int i=0; i<batchCount; i++)
{
if(cpu_info[i] != 0 ){
printf("magma_zpotrf_batched matrix %d returned internal error %d\n",i, (int)cpu_info[i] );
}
}
if (info != 0)
printf("magma_zpotrf_batched returned argument error %d: %s.\n", (int) info, magma_strerror( info ));
if ( opts.lapack ) {
/* =====================================================================
Performs operation using LAPACK
=================================================================== */
cpu_time = magma_wtime();
for(int i=0; i<batchCount; i++)
{
lapackf77_zpotrf( lapack_uplo_const(opts.uplo), &N, h_A + i * lda * N, &lda, &info );
}
cpu_time = magma_wtime() - cpu_time;
cpu_perf = gflops / cpu_time;
if (info != 0)
printf("lapackf77_zpotrf returned error %d: %s.\n",
(int) info, magma_strerror( info ));
/* =====================================================================
Check the result compared to LAPACK
=================================================================== */
magma_zgetmatrix( N, columns, d_A, ldda, h_R, lda );
magma_int_t NN = lda*N;
char const uplo = 'l'; // lapack_uplo_const(opts.uplo)
double err = 0.0;
for(int i=0; i<batchCount; i++)
{
error = lapackf77_zlanhe("f", &uplo, &N, h_A + i * lda*N, &lda, work);
blasf77_zaxpy(&NN, &c_neg_one, h_A + i * lda*N, &ione, h_R + i * lda*N, &ione);
error = lapackf77_zlanhe("f", &uplo, &N, h_R + i * lda*N, &lda, work) / error;
if ( isnan(error) || isinf(error) ) {
err = error;
break;
}
err = max(fabs(error),err);
}
printf("%5d %5d %7.2f (%7.2f) %7.2f (%7.2f) %8.2e %s\n",
(int)batchCount, (int) N, cpu_perf, cpu_time*1000., gpu_perf, gpu_time*1000., err, (error < tol ? "ok" : "failed"));
status += ! (err < tol);
}
else {
printf("%5d %5d --- ( --- ) %7.2f (%7.2f) --- \n",
(int)batchCount, (int) N, gpu_perf, gpu_time*1000. );
}
TESTING_FREE_CPU( h_A );
TESTING_FREE_PIN( h_R );
TESTING_FREE_DEV( d_A );
TESTING_FREE_DEV( d_A_array );
TESTING_FREE_DEV( dinfo_magma );
free(cpu_info);
}
if ( opts.niter > 1 ) {
printf( "\n" );
}
}
TESTING_FINALIZE();
return status;
}
/**
Purpose
-------
ZPOTRF computes the Cholesky factorization of a complex Hermitian
positive definite matrix dA.
The factorization has the form
dA = U**H * U, if UPLO = MagmaUpper, or
dA = L * L**H, if UPLO = MagmaLower,
where U is an upper triangular matrix and L is lower triangular.
This is the block version of the algorithm, calling Level 3 BLAS.
Arguments
---------
@param[in]
uplo magma_uplo_t
- = MagmaUpper: Upper triangle of dA is stored;
- = MagmaLower: Lower triangle of dA is stored.
@param[in]
n INTEGER
The order of the matrix dA. N >= 0.
@param[in,out]
dA COMPLEX_16 array on the GPU, dimension (LDDA,N)
On entry, the Hermitian matrix dA. If UPLO = MagmaUpper, the leading
N-by-N upper triangular part of dA contains the upper
triangular part of the matrix dA, and the strictly lower
triangular part of dA is not referenced. If UPLO = MagmaLower, the
leading N-by-N lower triangular part of dA contains the lower
triangular part of the matrix dA, and the strictly upper
triangular part of dA is not referenced.
\n
On exit, if INFO = 0, the factor U or L from the Cholesky
factorization dA = U**H * U or dA = L * L**H.
@param[in]
ldda INTEGER
The leading dimension of the array dA. LDDA >= max(1,N).
To benefit from coalescent memory accesses LDDA must be
divisible by 16.
@param[out]
info INTEGER
- = 0: successful exit
- < 0: if INFO = -i, the i-th argument had an illegal value
- > 0: if INFO = i, the leading minor of order i is not
positive definite, and the factorization could not be
completed.
@ingroup magma_zposv_comp
********************************************************************/
extern "C" magma_int_t
magma_zpotrf_gpu(
magma_uplo_t uplo, magma_int_t n,
magmaDoubleComplex_ptr dA, magma_int_t ldda,
magma_int_t *info )
{
#ifdef HAVE_clBLAS
#define dA(i_, j_) dA, ((i_) + (j_)*ldda + dA_offset)
#else
#define dA(i_, j_) (dA + (i_) + (j_)*ldda)
#endif
/* Constants */
const magmaDoubleComplex c_one = MAGMA_Z_ONE;
const magmaDoubleComplex c_neg_one = MAGMA_Z_NEG_ONE;
const double d_one = 1.0;
const double d_neg_one = -1.0;
/* Local variables */
const char* uplo_ = lapack_uplo_const( uplo );
bool upper = (uplo == MagmaUpper);
magma_int_t j, jb, nb;
magmaDoubleComplex *work;
*info = 0;
if (! upper && uplo != MagmaLower) {
*info = -1;
} else if (n < 0) {
*info = -2;
} else if (ldda < max(1,n)) {
*info = -4;
}
if (*info != 0) {
magma_xerbla( __func__, -(*info) );
return *info;
}
nb = magma_get_zpotrf_nb( n );
if (MAGMA_SUCCESS != magma_zmalloc_pinned( &work, nb*nb )) {
*info = MAGMA_ERR_HOST_ALLOC;
return *info;
}
magma_queue_t queues[2];
magma_device_t cdev;
magma_getdevice( &cdev );
magma_queue_create( cdev, &queues[0] );
magma_queue_create( cdev, &queues[1] );
if (nb <= 1 || nb >= n) {
/* Use unblocked code. */
magma_zgetmatrix( n, n, dA(0,0), ldda, work, n, queues[0] );
lapackf77_zpotrf( uplo_, &n, work, &n, info );
magma_zsetmatrix( n, n, work, n, dA(0,0), ldda, queues[0] );
}
else {
/* Use blocked code. */
if (upper) {
//=========================================================
/* Compute the Cholesky factorization A = U'*U. */
for (j=0; j < n; j += nb) {
// apply all previous updates to diagonal block,
// then transfer it to CPU
jb = min( nb, n-j );
magma_zherk( MagmaUpper, MagmaConjTrans, jb, j,
d_neg_one, dA(0, j), ldda,
d_one, dA(j, j), ldda, queues[1] );
magma_queue_sync( queues[1] );
magma_zgetmatrix_async( jb, jb,
dA(j, j), ldda,
work, jb, queues[0] );
// apply all previous updates to block row right of diagonal block
if (j+jb < n) {
magma_zgemm( MagmaConjTrans, MagmaNoTrans,
jb, n-j-jb, j,
c_neg_one, dA(0, j ), ldda,
dA(0, j+jb), ldda,
c_one, dA(j, j+jb), ldda, queues[1] );
}
// simultaneous with above zgemm, transfer diagonal block,
// factor it on CPU, and test for positive definiteness
magma_queue_sync( queues[0] );
lapackf77_zpotrf( MagmaUpperStr, &jb, work, &jb, info );
magma_zsetmatrix_async( jb, jb,
work, jb,
dA(j, j), ldda, queues[1] );
if (*info != 0) {
*info = *info + j;
break;
}
// apply diagonal block to block row right of diagonal block
if (j+jb < n) {
magma_ztrsm( MagmaLeft, MagmaUpper, MagmaConjTrans, MagmaNonUnit,
jb, n-j-jb,
c_one, dA(j, j), ldda,
dA(j, j+jb), ldda, queues[1] );
}
}
}
else {
//=========================================================
// Compute the Cholesky factorization A = L*L'.
for (j=0; j < n; j += nb) {
// apply all previous updates to diagonal block,
// then transfer it to CPU
jb = min( nb, n-j );
magma_zherk( MagmaLower, MagmaNoTrans, jb, j,
d_neg_one, dA(j, 0), ldda,
d_one, dA(j, j), ldda, queues[1] );
magma_queue_sync( queues[1] );
magma_zgetmatrix_async( jb, jb,
dA(j, j), ldda,
work, jb, queues[0] );
// apply all previous updates to block column below diagonal block
if (j+jb < n) {
magma_zgemm( MagmaNoTrans, MagmaConjTrans,
n-j-jb, jb, j,
c_neg_one, dA(j+jb, 0), ldda,
dA(j, 0), ldda,
c_one, dA(j+jb, j), ldda, queues[1] );
}
// simultaneous with above zgemm, transfer diagonal block,
// factor it on CPU, and test for positive definiteness
magma_queue_sync( queues[0] );
lapackf77_zpotrf( MagmaLowerStr, &jb, work, &jb, info );
magma_zsetmatrix_async( jb, jb,
work, jb,
dA(j, j), ldda, queues[1] );
if (*info != 0) {
*info = *info + j;
break;
}
// apply diagonal block to block column below diagonal
if (j+jb < n) {
magma_ztrsm( MagmaRight, MagmaLower, MagmaConjTrans, MagmaNonUnit,
n-j-jb, jb,
c_one, dA(j, j), ldda,
dA(j+jb, j), ldda, queues[1] );
}
}
}
}
magma_queue_destroy( queues[0] );
magma_queue_destroy( queues[1] );
magma_free_pinned( work );
return *info;
} /* magma_zpotrf_gpu */
/**
Purpose
-------
ZPOTRF_OOC computes the Cholesky factorization of a complex Hermitian
positive definite matrix A. This version does not require work
space on the GPU passed as input. GPU memory is allocated in the
routine. The matrix A may exceed the GPU memory.
The factorization has the form
A = U**H * U, if UPLO = MagmaUpper, or
A = L * L**H, if UPLO = MagmaLower,
where U is an upper triangular matrix and L is lower triangular.
This is the block version of the algorithm, calling Level 3 BLAS.
Arguments
---------
@param[in]
ngpu INTEGER
Number of GPUs to use. ngpu > 0.
@param[in]
uplo magma_uplo_t
- = MagmaUpper: Upper triangle of A is stored;
- = MagmaLower: Lower triangle of A is stored.
@param[in]
n INTEGER
The order of the matrix A. N >= 0.
@param[in,out]
A COMPLEX_16 array, dimension (LDA,N)
On entry, the symmetric matrix A. If UPLO = MagmaUpper, the leading
N-by-N upper triangular part of A contains the upper
triangular part of the matrix A, and the strictly lower
triangular part of A is not referenced. If UPLO = MagmaLower, the
leading N-by-N lower triangular part of A contains the lower
triangular part of the matrix A, and the strictly upper
triangular part of A is not referenced.
\n
On exit, if INFO = 0, the factor U or L from the Cholesky
factorization A = U**H * U or A = L * L**H.
\n
Higher performance is achieved if A is in pinned memory, e.g.
allocated using magma_malloc_pinned.
@param[in]
lda INTEGER
The leading dimension of the array A. LDA >= max(1,N).
@param[out]
info INTEGER
- = 0: successful exit
- < 0: if INFO = -i, the i-th argument had an illegal value
or another error occured, such as memory allocation failed.
- > 0: if INFO = i, the leading minor of order i is not
positive definite, and the factorization could not be
completed.
@ingroup magma_zposv_comp
********************************************************************/
extern "C" magma_int_t
magma_zpotrf_m(
magma_int_t ngpu,
magma_uplo_t uplo, magma_int_t n,
magmaDoubleComplex *A, magma_int_t lda,
magma_int_t *info)
{
#define A(i, j) ( A + (j)*lda + (i))
#define dA(d, i, j) (dwork[(d)] + (j)*lddla + (i))
#define dT(d, i, j) ( dt[(d)] + (j)*ldda + (i))
#define dAup(d, i, j) (dwork[(d)] + (j)*NB + (i))
#define dTup(d, i, j) ( dt[(d)] + (j)*nb + (i))
/* Local variables */
double d_one = 1.0;
double d_neg_one = -1.0;
magmaDoubleComplex c_one = MAGMA_Z_ONE;
magmaDoubleComplex c_neg_one = MAGMA_Z_NEG_ONE;
const char* uplo_ = lapack_uplo_const( uplo );
int upper = (uplo == MagmaUpper);
magmaDoubleComplex *dwork[MagmaMaxGPUs], *dt[MagmaMaxGPUs];
magma_int_t ldda, lddla, nb, iinfo, n_local[MagmaMaxGPUs], J2, d, ngpu0 = ngpu;
magma_int_t j, jj, jb, J, JB, NB, h;
magma_queue_t stream[MagmaMaxGPUs][3];
magma_event_t event[MagmaMaxGPUs][5];
magma_timer_t time_total=0, time_sum=0, time=0;
*info = 0;
if (! upper && uplo != MagmaLower) {
*info = -1;
} else if (n < 0) {
*info = -2;
} else if (lda < max(1,n)) {
*info = -4;
}
if (*info != 0) {
magma_xerbla( __func__, -(*info) );
return *info;
}
/* Quick return */
if ( n == 0 )
return *info;
magma_device_t orig_dev;
magma_getdevice( &orig_dev );
magma_queue_t orig_stream;
magmablasGetKernelStream( &orig_stream );
nb = magma_get_dpotrf_nb(n);
if ( ngpu0 > n/nb ) {
ngpu = n/nb;
if ( n%nb != 0 ) ngpu ++;
} else {
ngpu = ngpu0;
}
//ldda = ((n+31)/32)*32;
ldda = ((n+nb-1)/nb)*nb;
lddla = ((nb*((n+nb*ngpu-1)/(nb*ngpu))+31)/32)*32;
/* figure out NB */
size_t freeMem, totalMem;
cudaMemGetInfo( &freeMem, &totalMem );
freeMem /= sizeof(magmaDoubleComplex);
//MB = n; /* number of rows in the big panel */
NB = (magma_int_t)((0.8*freeMem - max(2,ngpu)*nb*ldda - (n+nb)*nb)/lddla); /* number of columns in the big panel */
//NB = min(5*nb,n);
if ( NB >= n ) {
#ifdef CHECK_ZPOTRF_OOC
printf( " * still fits in GPU memory.\n" );
#endif
NB = n;
} else {
#ifdef CHECK_ZPOTRF_OOC
printf( " * doesn't fit in GPU memory.\n" );
#endif
NB = (NB/nb) * nb; /* making sure it's devisable by nb */
}
#ifdef CHECK_ZPOTRF_OOC
if ( NB != n ) printf( " * running in out-core mode (n=%d, NB=%d, nb=%d, lddla=%d, freeMem=%.2e).\n", n, NB, nb, lddla, (double)freeMem );
else printf( " * running in in-core mode (n=%d, NB=%d, nb=%d, lddla=%d, freeMem=%.2e).\n", n, NB, nb, lddla, (double)freeMem );
fflush(stdout);
#endif
for (d=0; d < ngpu; d++ ) {
magma_setdevice(d);
if (MAGMA_SUCCESS != magma_zmalloc( &dt[d], NB*lddla + max(2,ngpu)*nb*ldda )) {
*info = MAGMA_ERR_DEVICE_ALLOC;
return *info;
}
dwork[d] = &dt[d][max(2,ngpu)*nb*ldda];
for( j=0; j < 3; j++ )
magma_queue_create( &stream[d][j] );
for( j=0; j < 5; j++ )
magma_event_create( &event[d][j] );
magma_device_sync(); // synch the device
}
magma_setdevice(0);
timer_start( time_total );
if (nb <= 1 || nb >= n) {
lapackf77_zpotrf(uplo_, &n, A, &lda, info);
} else {
/* Use hybrid blocked code. */
if (upper) {
/* =========================================================== *
* Compute the Cholesky factorization A = U'*U. *
* big panel is divided by block-row and distributed in block *
* column cyclic format */
/* for each big-panel */
for( J=0; J < n; J += NB ) {
JB = min(NB,n-J);
if ( ngpu0 > (n-J)/nb ) {
ngpu = (n-J)/nb;
if ( (n-J)%nb != 0 ) ngpu ++;
} else {
ngpu = ngpu0;
}
/* load the new big-panel by block-rows */
magma_zhtodpo( ngpu, uplo, JB, n, J, J, nb, A, lda, dwork, NB, stream, &iinfo);
/* update with the previous big-panels */
timer_start( time );
for( j=0; j < J; j += nb ) {
/* upload the diagonal of the block column (broadcast to all GPUs) */
for( d=0; d < ngpu; d++ ) {
magma_setdevice(d);
magma_zsetmatrix_async( nb, JB,
A(j, J), lda,
dTup(d, 0, J), nb,
stream[d][0] );
n_local[d] = 0;
}
/* distribute off-diagonal blocks to GPUs */
for( jj=J+JB; jj < n; jj += nb ) {
d = ((jj-J)/nb)%ngpu;
magma_setdevice(d);
jb = min(nb, n-jj);
magma_zsetmatrix_async( nb, jb,
A(j, jj), lda,
dTup(d, 0, J+JB+n_local[d]), nb,
stream[d][0] );
n_local[d] += jb;
}
/* wait for the communication */
for( d=0; d < ngpu; d++ ) {
magma_setdevice(d);
magma_queue_sync( stream[d][0] );
}
/* update the current big-panel using the previous block-row */
/* -- process the big diagonal block of the big panel */
for( jj=0; jj < JB; jj += nb ) { // jj is 'local' column index within the big panel
d = (jj/nb)%ngpu;
J2 = jj/(nb*ngpu);
magma_setdevice(d);
magmablasSetKernelStream(stream[d][J2%2]); // the last stream (2) used to process off-diagonal
J2 = nb*J2;
jb = min(nb,JB-jj); // number of columns in this current block-row
magma_zgemm( MagmaConjTrans, MagmaNoTrans,
jj, jb, nb,
c_neg_one, dTup(d, 0, J ), nb,
dTup(d, 0, J+jj), nb,
c_one, dAup(d, 0, J2), NB);
magma_zherk(MagmaUpper, MagmaConjTrans, jb, nb,
d_neg_one, dTup(d, 0, J+jj), nb,
d_one, dAup(d, jj, J2), NB);
}
/* -- process the remaining big off-diagonal block of the big panel */
if ( n > J+JB ) {
for( d=0; d < ngpu; d++ ) {
magma_setdevice(d);
magmablasSetKernelStream(stream[d][2]);
/* local number of columns in the big panel */
n_local[d] = ((n-J)/(nb*ngpu))*nb;
if (d < ((n-J)/nb)%ngpu)
n_local[d] += nb;
else if (d == ((n-J)/nb)%ngpu)
n_local[d] += (n-J)%nb;
/* subtracting the local number of columns in the diagonal */
J2 = nb*(JB/(nb*ngpu));
if ( d < (JB/nb)%ngpu )
J2 += nb;
n_local[d] -= J2;
magma_zgemm( MagmaConjTrans, MagmaNoTrans,
JB, n_local[d], nb,
c_neg_one, dTup(d, 0, J ), nb,
dTup(d, 0, J+JB), nb,
c_one, dAup(d, 0, J2), NB);
}
}
/* wait for the previous updates */
for( d=0; d < ngpu; d++ ) {
magma_setdevice(d);
for( jj=0; jj < 3; jj++ )
magma_queue_sync( stream[d][jj] );
magmablasSetKernelStream(NULL);
}
magma_setdevice(0);
} /* end of updates with previous rows */
/* factor the big panel */
h = (JB+nb-1)/nb; // big diagonal of big panel will be on CPU
// using three streams
magma_zpotrf3_mgpu(ngpu, uplo, JB, n-J, J, J, nb,
dwork, NB, dt, ldda, A, lda, h, stream, event, &iinfo);
if ( iinfo != 0 ) {
*info = J+iinfo;
break;
}
time_sum += timer_stop( time );
/* upload the off-diagonal (and diagonal!!!) big panel */
magma_zdtohpo(ngpu, uplo, JB, n, J, J, nb, NB, A, lda, dwork, NB, stream, &iinfo);
//magma_zdtohpo(ngpu, uplo, JB, n, J, J, nb, 0, A, lda, dwork, NB, stream, &iinfo);
}
} else {
/* ========================================================= *
* Compute the Cholesky factorization A = L*L'. */
/* for each big-panel */
for( J=0; J < n; J += NB ) {
JB = min(NB,n-J);
if ( ngpu0 > (n-J)/nb ) {
ngpu = (n-J)/nb;
if ( (n-J)%nb != 0 ) ngpu ++;
} else {
ngpu = ngpu0;
}
/* load the new big-panel by block-columns */
magma_zhtodpo( ngpu, uplo, n, JB, J, J, nb, A, lda, dwork, lddla, stream, &iinfo);
/* update with the previous big-panels */
timer_start( time );
for( j=0; j < J; j += nb ) {
/* upload the diagonal of big panel */
for( d=0; d < ngpu; d++ ) {
magma_setdevice(d);
magma_zsetmatrix_async( JB, nb,
A(J, j), lda,
dT(d, J, 0), ldda,
stream[d][0] );
n_local[d] = 0;
}
/* upload off-diagonals */
for( jj=J+JB; jj < n; jj += nb ) {
d = ((jj-J)/nb)%ngpu;
magma_setdevice(d);
jb = min(nb, n-jj);
magma_zsetmatrix_async( jb, nb,
A(jj, j), lda,
dT(d, J+JB+n_local[d], 0), ldda,
stream[d][0] );
n_local[d] += jb;
}
/* wait for the communication */
for( d=0; d < ngpu; d++ ) {
magma_setdevice(d);
magma_queue_sync( stream[d][0] );
}
/* update the current big-panel using the previous block-row */
for( jj=0; jj < JB; jj += nb ) { /* diagonal */
d = (jj/nb)%ngpu;
J2 = jj/(nb*ngpu);
magma_setdevice(d);
magmablasSetKernelStream(stream[d][J2%2]);
J2 = nb*J2;
jb = min(nb,JB-jj);
magma_zgemm( MagmaNoTrans, MagmaConjTrans,
jb, jj, nb,
c_neg_one, dT(d, J+jj, 0), ldda,
dT(d, J, 0), ldda,
c_one, dA(d, J2, 0), lddla);
magma_zherk(MagmaLower, MagmaNoTrans, jb, nb,
d_neg_one, dT(d, J+jj, 0), ldda,
d_one, dA(d, J2, jj), lddla);
}
if ( n > J+JB ) { /* off-diagonal */
for( d=0; d < ngpu; d++ ) {
magma_setdevice(d);
magmablasSetKernelStream(stream[d][2]);
/* local number of columns in the big panel */
n_local[d] = (((n-J)/nb)/ngpu)*nb;
if (d < ((n-J)/nb)%ngpu)
n_local[d] += nb;
else if (d == ((n-J)/nb)%ngpu)
n_local[d] += (n-J)%nb;
/* subtracting local number of columns in diagonal */
J2 = nb*(JB/(nb*ngpu));
if ( d < (JB/nb)%ngpu )
J2 += nb;
n_local[d] -= J2;
magma_zgemm( MagmaNoTrans, MagmaConjTrans,
n_local[d], JB, nb,
c_neg_one, dT(d, J+JB, 0), ldda,
dT(d, J, 0), ldda,
c_one, dA(d, J2, 0), lddla);
}
}
/* wait for the previous updates */
for( d=0; d < ngpu; d++ ) {
magma_setdevice(d);
for( jj=0; jj < 3; jj++ )
magma_queue_sync( stream[d][jj] );
magmablasSetKernelStream(NULL);
}
magma_setdevice(0);
}
/* factor the big panel */
h = (JB+nb-1)/nb; // big diagonal of big panel will be on CPU
// using three streams
magma_zpotrf3_mgpu(ngpu, uplo, n-J, JB, J, J, nb,
dwork, lddla, dt, ldda, A, lda, h, stream, event, &iinfo);
if ( iinfo != 0 ) {
*info = J+iinfo;
break;
}
time_sum += timer_stop( time );
/* upload the off-diagonal big panel */
magma_zdtohpo( ngpu, uplo, n, JB, J, J, nb, JB, A, lda, dwork, lddla, stream, &iinfo);
} /* end of for J */
} /* if upper */
} /* if nb */
timer_stop( time_total );
if ( ngpu0 > n/nb ) {
ngpu = n/nb;
if ( n%nb != 0 ) ngpu ++;
} else {
ngpu = ngpu0;
}
for (d=0; d < ngpu; d++ ) {
magma_setdevice(d);
for( j=0; j < 3; j++ ) {
magma_queue_destroy( stream[d][j] );
}
magma_free( dt[d] );
for( j=0; j < 5; j++ ) {
magma_event_destroy( event[d][j] );
}
}
magma_setdevice( orig_dev );
magmablasSetKernelStream( orig_stream );
timer_printf( "\n n=%d NB=%d nb=%d\n", (int) n, (int) NB, (int) nb );
timer_printf( " Without memory allocation: %f / %f = %f GFlop/s\n",
FLOPS_ZPOTRF(n) / 1e9, time_total,
FLOPS_ZPOTRF(n) / 1e9 / time_total );
timer_printf( " Performance %f / %f = %f GFlop/s\n",
FLOPS_ZPOTRF(n) / 1e9, time_sum,
FLOPS_ZPOTRF(n) / 1e9 / time_sum );
return *info;
} /* magma_zpotrf_ooc */
int main( int argc, char** argv)
{
real_Double_t gflops, gpu_perf, cpu_perf, gpu_time, cpu_time;
magmaDoubleComplex *h_A, *h_R;
magmaDoubleComplex_ptr d_lA[MagmaMaxGPUs];
magma_int_t N = 0, n2, lda, ldda;
magma_int_t size[10] =
{ 1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000 };
magma_int_t i, j, k, info;
magmaDoubleComplex mz_one = MAGMA_Z_NEG_ONE;
magma_int_t ione = 1;
magma_int_t ISEED[4] = {0,0,0,1};
double work[1], matnorm, diffnorm;
magma_int_t num_gpus0 = 1, num_gpus, flag = 0;
int nb, mb, n_local, nk;
magma_uplo_t uplo = MagmaLower;
if (argc != 1){
for(i = 1; i<argc; i++){
if (strcmp("-N", argv[i])==0){
N = atoi(argv[++i]);
if (N>0) {
size[0] = size[9] = N;
flag = 1;
}else exit(1);
}
if(strcmp("-NGPU", argv[i])==0)
num_gpus0 = atoi(argv[++i]);
if(strcmp("-UPLO", argv[i])==0){
if(strcmp("L", argv[++i])==0){
uplo = MagmaLower;
}else{
uplo = MagmaUpper;
}
}
}
}
else {
printf("\nUsage: \n");
printf(" testing_zpotrf_mgpu -N %d -NGPU %d -UPLO -L\n\n", 1024, num_gpus0);
}
/* looking for max. ldda */
ldda = 0;
n2 = 0;
for(i=0;i<10;i++){
N = size[i];
nb = magma_get_zpotrf_nb(N);
mb = nb;
if(num_gpus0 > N/nb){
num_gpus = N/nb;
if(N%nb != 0) num_gpus ++;
}else{
num_gpus = num_gpus0;
}
n_local = nb*(1+N/(nb*num_gpus))*mb*((N+mb-1)/mb);
if(n_local > ldda) ldda = n_local;
if(n2 < N*N) n2 = N*N;
if(flag != 0) break;
}
/* Allocate host memory for the matrix */
TESTING_MALLOC_PIN( h_A, magmaDoubleComplex, n2 );
TESTING_MALLOC_PIN( h_R, magmaDoubleComplex, n2 );
/* Initialize */
magma_queue_t queues[MagmaMaxGPUs * 2];
//magma_queue_t queues[MagmaMaxGPUs];
magma_device_t devices[ MagmaMaxGPUs ];
magma_int_t num = 0;
magma_int_t err;
magma_init();
err = magma_getdevices( devices, MagmaMaxGPUs, &num );
if ( err != 0 || num < 1 ) {
fprintf( stderr, "magma_getdevices failed: %d\n", (int) err );
exit(-1);
}
for(i=0;i<num_gpus;i++){
err = magma_queue_create( devices[i], &queues[2*i] );
if ( err != 0 ) {
fprintf( stderr, "magma_queue_create failed: %d\n", (int) err );
exit(-1);
}
err = magma_queue_create( devices[i], &queues[2*i+1] );
if ( err != 0 ) {
fprintf( stderr, "magma_queue_create failed: %d\n", (int) err );
exit(-1);
}
}
printf("each buffer size: %d\n", ldda);
/* allocate local matrix on Buffers */
for(i=0; i<num_gpus0; i++){
TESTING_MALLOC_DEV( d_lA[i], magmaDoubleComplex, ldda );
}
printf("\n\n");
printf("Using GPUs: %d\n", num_gpus0);
if(uplo == MagmaUpper){
printf("\n testing_zpotrf_mgpu -N %d -NGPU %d -UPLO U\n\n", N, num_gpus0);
}else{
printf("\n testing_zpotrf_mgpu -N %d -NGPU %d -UPLO L\n\n", N, num_gpus0);
}
printf(" N CPU GFlop/s (sec) GPU GFlop/s (sec) ||R_magma-R_lapack||_F / ||R_lapack||_F\n");
printf("========================================================================================\n");
for(i=0; i<10; i++){
N = size[i];
lda = N;
n2 = lda*N;
ldda = ((N+31)/32)*32;
gflops = FLOPS( (double)N ) * 1e-9;
/* Initialize the matrix */
lapackf77_zlarnv( &ione, ISEED, &n2, h_A );
/* Symmetrize and increase the diagonal */
for( int i = 0; i < N; ++i ) {
h_A(i,i) = MAGMA_Z_MAKE( MAGMA_Z_REAL(h_A(i,i)) + N, 0 );
for( int j = 0; j < i; ++j ) {
h_A(i, j) = MAGMA_Z_CNJG( h_A(j,i) );
}
}
lapackf77_zlacpy( MagmaFullStr, &N, &N, h_A, &lda, h_R, &lda );
/* Warm up to measure the performance */
nb = magma_get_zpotrf_nb(N);
if(num_gpus0 > N/nb){
num_gpus = N/nb;
if(N%nb != 0) num_gpus ++;
printf("too many GPUs for the matrix size, using %d GPUs\n", (int)num_gpus);
}else{
num_gpus = num_gpus0;
}
/* distribute matrix to gpus */
if(uplo == MagmaUpper){
// Upper
ldda = ((N+mb-1)/mb)*mb;
for(j=0;j<N;j+=nb){
k = (j/nb)%num_gpus;
nk = min(nb, N-j);
magma_zsetmatrix( N, nk,
&h_A[j*lda], lda,
d_lA[k], j/(nb*num_gpus)*nb*ldda, ldda,
queues[2*k]);
}
}else{
// Lower
ldda = (1+N/(nb*num_gpus))*nb;
for(j=0;j<N;j+=nb){
k = (j/nb)%num_gpus;
nk = min(nb, N-j);
magma_zsetmatrix( nk, N, &h_A[j], lda,
d_lA[k], (j/(nb*num_gpus)*nb), ldda,
queues[2*k]);
}
}
magma_zpotrf_mgpu( num_gpus, uplo, N, d_lA, 0, ldda, queues, &info );
/* ====================================================================
Performs operation using MAGMA
=================================================================== */
/* distribute matrix to gpus */
if(uplo == MagmaUpper){
// Upper
ldda = ((N+mb-1)/mb)*mb;
for(j=0;j<N;j+=nb){
k = (j/nb)%num_gpus;
nk = min(nb, N-j);
magma_zsetmatrix( N, nk,
&h_A[j*lda], lda,
d_lA[k], j/(nb*num_gpus)*nb*ldda, ldda,
queues[2*k]);
}
}else{
// Lower
ldda = (1+N/(nb*num_gpus))*nb;
for(j=0;j<N;j+=nb){
k = (j/nb)%num_gpus;
nk = min(nb, N-j);
magma_zsetmatrix( nk, N, &h_A[j], lda,
d_lA[k], (j/(nb*num_gpus)*nb), ldda,
queues[2*k]);
}
}
gpu_time = magma_wtime();
magma_zpotrf_mgpu( num_gpus, uplo, N, d_lA, 0, ldda, queues, &info );
gpu_time = magma_wtime() - gpu_time;
if (info != 0)
printf( "magma_zpotrf had error %d.\n", info );
gpu_perf = gflops / gpu_time;
/* gather matrix from gpus */
if(uplo==MagmaUpper){
// Upper
for(j=0;j<N;j+=nb){
k = (j/nb)%num_gpus;
nk = min(nb, N-j);
magma_zgetmatrix( N, nk,
d_lA[k], j/(nb*num_gpus)*nb*ldda, ldda,
&h_R[j*lda], lda, queues[2*k]);
}
}else{
// Lower
for(j=0; j<N; j+=nb){
k = (j/nb)%num_gpus;
nk = min(nb, N-j);
magma_zgetmatrix( nk, N,
d_lA[k], (j/(nb*num_gpus)*nb), ldda,
&h_R[j], lda, queues[2*k] );
}
}
/* =====================================================================
Performs operation using LAPACK
=================================================================== */
cpu_time = magma_wtime();
if(uplo == MagmaLower){
lapackf77_zpotrf( MagmaLowerStr, &N, h_A, &lda, &info );
}else{
lapackf77_zpotrf( MagmaUpperStr, &N, h_A, &lda, &info );
}
cpu_time = magma_wtime() - cpu_time;
if (info != 0)
printf( "lapackf77_zpotrf had error %d.\n", info );
cpu_perf = gflops / cpu_time;
/* =====================================================================
Check the result compared to LAPACK
|R_magma - R_lapack| / |R_lapack|
=================================================================== */
matnorm = lapackf77_zlange("f", &N, &N, h_A, &lda, work);
blasf77_zaxpy(&n2, &mz_one, h_A, &ione, h_R, &ione);
diffnorm = lapackf77_zlange("f", &N, &N, h_R, &lda, work);
printf( "%5d %6.2f (%6.2f) %6.2f (%6.2f) %e\n",
N, cpu_perf, cpu_time, gpu_perf, gpu_time, diffnorm / matnorm );
if (flag != 0)
break;
}
/* clean up */
TESTING_FREE_PIN( h_A );
TESTING_FREE_PIN( h_R );
for(i=0;i<num_gpus;i++){
TESTING_FREE_DEV( d_lA[i] );
magma_queue_destroy( queues[2*i] );
magma_queue_destroy( queues[2*i+1] );
}
magma_finalize();
}
/* ////////////////////////////////////////////////////////////////////////////
-- Testing zpotf2_gpu
*/
int main( int argc, char** argv)
{
TESTING_INIT();
real_Double_t gflops, gpu_perf, gpu_time, cpu_perf, cpu_time;
magmaDoubleComplex *h_A, *h_R;
magmaDoubleComplex *d_A;
magma_int_t N, n2, lda, ldda, info;
magmaDoubleComplex c_neg_one = MAGMA_Z_NEG_ONE;
magma_int_t ione = 1;
magma_int_t ISEED[4] = {0,0,0,1};
double work[1], error;
magma_opts opts;
parse_opts( argc, argv, &opts );
opts.lapack |= opts.check; // check (-c) implies lapack (-l)
printf(" N CPU GFlop/s (ms) GPU GFlop/s (ms) ||R_magma - R_lapack||_F / ||R_lapack||_F\n");
printf("========================================================\n");
for( int i = 0; i < opts.ntest; ++i ) {
for( int iter = 0; iter < opts.niter; ++iter ) {
N = opts.nsize[i];
lda = N;
n2 = lda*N;
ldda = ((N+31)/32)*32;
gflops = FLOPS_ZPOTRF( N ) / 1e9;
TESTING_MALLOC( h_A, magmaDoubleComplex, n2 );
TESTING_HOSTALLOC( h_R, magmaDoubleComplex, n2 );
TESTING_DEVALLOC( d_A, magmaDoubleComplex, ldda*N );
/* Initialize the matrix */
lapackf77_zlarnv( &ione, ISEED, &n2, h_A );
magma_zmake_hpd( N, h_A, lda );
lapackf77_zlacpy( MagmaUpperLowerStr, &N, &N, h_A, &lda, h_R, &lda );
magma_zsetmatrix( N, N, h_A, lda, d_A, ldda );
/* ====================================================================
Performs operation using MAGMA
=================================================================== */
gpu_time = magma_wtime();
magma_zpotf2_gpu( opts.uplo, N, d_A, ldda, &info );
gpu_time = magma_wtime() - gpu_time;
gpu_perf = gflops / gpu_time;
if (info != 0)
printf("magma_zpotf2_gpu returned error %d: %s.\n",
(int) info, magma_strerror( info ));
if ( opts.lapack ) {
/* =====================================================================
Performs operation using LAPACK
=================================================================== */
cpu_time = magma_wtime();
lapackf77_zpotrf( &opts.uplo, &N, h_A, &lda, &info );
cpu_time = magma_wtime() - cpu_time;
cpu_perf = gflops / cpu_time;
if (info != 0)
printf("lapackf77_zpotrf returned error %d: %s.\n",
(int) info, magma_strerror( info ));
/* =====================================================================
Check the result compared to LAPACK
=================================================================== */
magma_zgetmatrix( N, N, d_A, ldda, h_R, lda );
error = lapackf77_zlange("f", &N, &N, h_A, &lda, work);
blasf77_zaxpy(&n2, &c_neg_one, h_A, &ione, h_R, &ione);
error = lapackf77_zlange("f", &N, &N, h_R, &lda, work) / error;
printf("%5d %7.2f (%7.2f) %7.2f (%7.2f) %8.2e\n",
(int) N, cpu_perf, cpu_time*1000., gpu_perf, gpu_time*1000., error );
}
else {
printf("%5d --- ( --- ) %7.2f (%7.2f) --- \n",
(int) N, gpu_perf, gpu_time*1000. );
}
TESTING_FREE( h_A );
TESTING_HOSTFREE( h_R );
TESTING_DEVFREE( d_A );
}
if ( opts.niter > 1 ) {
printf( "\n" );
}
}
TESTING_FINALIZE();
return 0;
}
/* ////////////////////////////////////////////////////////////////////////////
-- Testing zpotrf_mgpu
*/
int main( int argc, char** argv)
{
TESTING_CUDA_INIT();
magma_setdevice(0);
magma_timestr_t start, end;
double flops, gpu_perf, cpu_perf;
cuDoubleComplex *h_A, *h_R;
cuDoubleComplex *d_lA[4];
magma_int_t N = 0, n2, mb, nb, nk, lda, ldda, n_local, ldn_local;
//magma_int_t size[10] = {1000,2000,3000,4000,5000,6000,7000,8000,9000,10000};
magma_int_t size[10] = {1024,2048,3072,4032,5184,6016,7040,8064,9088,10112};
magma_int_t n_sizes = 10, flag = 0;
magma_int_t i, j, k, info, num_gpus0 = 1, num_gpus;
const char *uplo = MagmaLowerStr;
cuDoubleComplex c_neg_one = MAGMA_Z_NEG_ONE;
magma_int_t ione = 1;
magma_int_t ISEED[4] = {0,0,0,1};
double work[1], matnorm;
N = size[n_sizes-1];
if (argc != 1){
for(i = 1; i<argc; i++){
if (strcmp("-N", argv[i])==0) {
flag = 1;
N = atoi(argv[++i]);
size[0] = size[n_sizes-1] = N;
}
if (strcmp("-NGPU", argv[i])==0)
num_gpus0 = atoi(argv[++i]);
if (strcmp("-UPLO",argv[i])==0) {
if (strcmp("L",argv[++i])==0) uplo = MagmaLowerStr;
else uplo = MagmaUpperStr;
}
}
if (strcmp(uplo,MagmaLowerStr)==0)
printf("\n testing_zpotrf_mgpu -N %d -NGPU %d -UPLO L\n\n", (int) N, (int) num_gpus0 );
else
printf("\n testing_zpotrf_mgpu -N %d -NGPU %d -UPLO U\n\n", (int) N, (int) num_gpus0 );
} else {
printf("\nDefault: \n");
printf(" testing_zpotrf_mgpu -N %d:%d -NGPU %d -UPLO L\n\n", (int) size[0], (int) size[n_sizes-1], (int) num_gpus0 );
}
if( N <= 0 || num_gpus0 <= 0 ) {
printf( " invalid input N=%d NGPU=%d\n", (int) N, (int) num_gpus0 );
exit(1);
}
/* looking for max. ldda */
ldda = 0;
n2 = 0;
for(i=0; i<n_sizes; i++){
N = size[i];
nb = magma_get_zpotrf_nb(N);
mb = nb;
if( num_gpus0 > N/nb ) {
num_gpus = N/nb;
if( N%nb != 0 ) num_gpus ++;
} else {
num_gpus = num_gpus0;
}
n_local = nb*(1+N/(nb*num_gpus)) * mb*((N+mb-1)/mb);
if( n_local > ldda ) ldda = n_local;
if( n2 < N*N ) n2 = N*N;
if (flag != 0) break;
}
/* Allocate host memory for the matrix */
TESTING_HOSTALLOC( h_A, cuDoubleComplex, n2);
TESTING_HOSTALLOC( h_R, cuDoubleComplex, n2);
/* allocate local matrix on GPU */
for(i=0; i<num_gpus0; i++){
magma_setdevice(i);
TESTING_DEVALLOC( d_lA[i], cuDoubleComplex, ldda );
}
magma_setdevice(0);
printf(" N CPU GFlop/s GPU GFlop/s ||R||_F / ||A||_F\n");
printf("========================================================\n");
for(i=0; i<n_sizes; i++){
N = size[i];
lda = N;
n2 = lda*N;
flops = FLOPS( (double)N ) / 1000000;
/* Initialize the matrix */
lapackf77_zlarnv( &ione, ISEED, &n2, h_A );
/* Symmetrize and increase the diagonal */
{
magma_int_t i, j;
for(i=0; i<N; i++) {
MAGMA_Z_SET2REAL( h_A[i*lda+i], ( MAGMA_Z_REAL(h_A[i*lda+i]) + 1.*N ) );
for(j=0; j<i; j++)
h_A[i*lda+j] = cuConj(h_A[j*lda+i]);
}
}
lapackf77_zlacpy( MagmaUpperLowerStr, &N, &N, h_A, &lda, h_R, &lda );
/* ====================================================================
Performs operation using MAGMA
=================================================================== */
nb = magma_get_zpotrf_nb(N);
if( num_gpus0 > N/nb ) {
num_gpus = N/nb;
if( N%nb != 0 ) num_gpus ++;
printf( " * too many GPUs for the matrix size, using %d GPUs\n", (int) num_gpus );
} else {
num_gpus = num_gpus0;
}
/* distribute matrix to gpus */
if( lapackf77_lsame(uplo, "U") ) {
/* going through each block-column */
ldda = ((N+mb-1)/mb)*mb;
for(j=0; j<N; j+=nb){
k = (j/nb)%num_gpus;
magma_setdevice(k);
nk = min(nb, N-j);
magma_zsetmatrix( N, nk,
h_A+j*lda, lda,
d_lA[k]+j/(nb*num_gpus)*nb*ldda, ldda );
}
} else {
/* going through each block-row */
ldda = (1+N/(nb*num_gpus))*nb;
for(j=0; j<N; j+=nb){
k = (j/nb)%num_gpus;
magma_setdevice(k);
nk = min(nb, N-j);
magma_zsetmatrix( nk, N,
h_A+j, lda,
d_lA[k]+j/(nb*num_gpus)*nb, ldda );
}
}
magma_setdevice(0);
/* call magma_zpotrf_mgpu */
start = get_current_time();
magma_zpotrf_mgpu(num_gpus, uplo[0], N, d_lA, ldda, &info);
end = get_current_time();
if (info < 0) {
printf("Argument %d of magma_zpotrf_mgpu had an illegal value.\n", (int) -info);
break;
} else if (info != 0) {
printf("magma_zpotrf_mgpu returned info=%d\n", (int) info );
break;
}
gpu_perf = flops / GetTimerValue(start, end);
/* gather matrix from gpus */
if( lapackf77_lsame(uplo, "U") ) {
for(j=0; j<N; j+=nb){
k = (j/nb)%num_gpus;
magma_setdevice(k);
nk = min(nb, N-j);
magma_zgetmatrix( N, nk,
d_lA[k]+j/(nb*num_gpus)*nb*ldda, ldda,
h_R+j*lda, lda );
}
} else {
for(j=0; j<N; j+=nb){
k = (j/nb)%num_gpus;
magma_setdevice(k);
nk = min(nb, N-j);
magma_zgetmatrix( nk, N,
d_lA[k]+j/(nb*num_gpus)*nb, ldda,
h_R+j, lda );
}
}
magma_setdevice(0);
/* =====================================================================
Performs operation using LAPACK
=================================================================== */
start = get_current_time();
lapackf77_zpotrf(uplo, &N, h_A, &lda, &info);
end = get_current_time();
if (info < 0) {
printf("Argument %d of zpotrf had an illegal value.\n", (int) -info);
break;
} else if (info != 0) {
printf("lapackf77_zpotrf returned info=%d\n", (int) info );
break;
}
cpu_perf = flops / GetTimerValue(start, end);
/* =====================================================================
Check the result compared to LAPACK
=================================================================== */
matnorm = lapackf77_zlange("f", &N, &N, h_A, &lda, work);
blasf77_zaxpy(&n2, &c_neg_one, h_A, &ione, h_R, &ione);
printf("%5d %6.2f %6.2f %e\n",
(int) size[i], cpu_perf, gpu_perf,
lapackf77_zlange("f", &N, &N, h_R, &lda, work) / matnorm);
if (flag != 0) break;
}
/* Memory clean up */
TESTING_HOSTFREE( h_A );
TESTING_HOSTFREE( h_R );
for(i=0; i<num_gpus; i++){
magma_setdevice(i);
TESTING_DEVFREE( d_lA[i] );
}
/* Shutdown */
TESTING_CUDA_FINALIZE();
}
/**
Purpose
-------
ZGEGQR orthogonalizes the N vectors given by a complex M-by-N matrix A:
A = Q * R.
On exit, if successful, the orthogonal vectors Q overwrite A
and R is given in work (on the CPU memory).
The routine is designed for tall-and-skinny matrices: M >> N, N <= 128.
This version uses normal equations and SVD in an iterative process that
makes the computation numerically accurate.
Arguments
---------
@param[in]
ikind INTEGER
Several versions are implemented indiceted by the ikind value:
1: This version uses normal equations and SVD in an iterative process
that makes the computation numerically accurate.
2: This version uses a standard LAPACK-based orthogonalization through
MAGMA's QR panel factorization (magma_zgeqr2x3_gpu) and magma_zungqr
3: Modified Gram-Schmidt (MGS)
4. Cholesky QR [ Note: this method uses the normal equations which
squares the condition number of A, therefore
||I - Q'Q|| < O(eps cond(A)^2) ]
@param[in]
m INTEGER
The number of rows of the matrix A. m >= n >= 0.
@param[in]
n INTEGER
The number of columns of the matrix A. 128 >= n >= 0.
@param[in,out]
dA COMPLEX_16 array on the GPU, dimension (ldda,n)
On entry, the m-by-n matrix A.
On exit, the m-by-n matrix Q with orthogonal columns.
@param[in]
ldda INTEGER
The leading dimension of the array dA. LDDA >= max(1,m).
To benefit from coalescent memory accesses LDDA must be
divisible by 16.
@param
dwork (GPU workspace) COMPLEX_16 array, dimension:
n^2 for ikind = 1
3 n^2 + min(m, n) + 2 for ikind = 2
0 (not used) for ikind = 3
n^2 for ikind = 4
@param[out]
work (CPU workspace) COMPLEX_16 array, dimension 3 n^2.
On exit, work(1:n^2) holds the rectangular matrix R.
Preferably, for higher performance, work should be in pinned memory.
@param[out]
info INTEGER
- = 0: successful exit
- < 0: if INFO = -i, the i-th argument had an illegal value
or another error occured, such as memory allocation failed.
- > 0: for ikind = 4, the normal equations were not
positive definite, so the factorization could not be
completed, and the solution has not been computed.
@ingroup magma_zgeqrf_comp
********************************************************************/
extern "C" magma_int_t
magma_zgegqr_gpu(
magma_int_t ikind, magma_int_t m, magma_int_t n,
magmaDoubleComplex_ptr dA, magma_int_t ldda,
magmaDoubleComplex_ptr dwork, magmaDoubleComplex *work,
magma_int_t *info )
{
#define work(i_,j_) (work + (i_) + (j_)*n)
#define dA(i_,j_) (dA + (i_) + (j_)*ldda)
magma_int_t i = 0, j, k, n2 = n*n;
magma_int_t ione = 1;
magmaDoubleComplex c_zero = MAGMA_Z_ZERO;
magmaDoubleComplex c_one = MAGMA_Z_ONE;
double cn = 200., mins, maxs;
/* check arguments */
*info = 0;
if (ikind < 1 || ikind > 4) {
*info = -1;
} else if (m < 0 || m < n) {
*info = -2;
} else if (n < 0 || n > 128) {
*info = -3;
} else if (ldda < max(1,m)) {
*info = -5;
}
if (*info != 0) {
magma_xerbla( __func__, -(*info) );
return *info;
}
magma_queue_t queue;
magma_device_t cdev;
magma_getdevice( &cdev );
magma_queue_create( cdev, &queue );
if (ikind == 1) {
// === Iterative, based on SVD ============================================================
magmaDoubleComplex *U, *VT, *vt, *R, *G, *hwork, *tau;
double *S;
R = work; // Size n * n
G = R + n*n; // Size n * n
VT = G + n*n; // Size n * n
magma_zmalloc_cpu( &hwork, 32 + 2*n*n + 2*n );
if ( hwork == NULL ) {
*info = MAGMA_ERR_HOST_ALLOC;
return *info;
}
magma_int_t lwork=n*n+32; // First part f hwork; used as workspace in svd
U = hwork + n*n + 32; // Size n*n
S = (double*)(U + n*n); // Size n
tau = U + n*n + n; // Size n
#ifdef COMPLEX
double *rwork;
magma_dmalloc_cpu( &rwork, 5*n );
if ( rwork == NULL ) {
*info = MAGMA_ERR_HOST_ALLOC;
return *info;
}
#endif
do {
i++;
magma_zgemm( MagmaConjTrans, MagmaNoTrans, n, n, m, c_one,
dA, ldda, dA, ldda, c_zero, dwork, n, queue );
magma_zgetmatrix( n, n, dwork, n, G, n, queue );
lapackf77_zgesvd( "n", "a", &n, &n, G, &n, S, U, &n, VT, &n,
hwork, &lwork,
#ifdef COMPLEX
rwork,
#endif
info );
mins = 100.f, maxs = 0.f;
for (k=0; k < n; k++) {
S[k] = magma_dsqrt( S[k] );
if (S[k] < mins) mins = S[k];
if (S[k] > maxs) maxs = S[k];
}
for (k=0; k < n; k++) {
vt = VT + k*n;
for (j=0; j < n; j++)
vt[j] *= S[j];
}
lapackf77_zgeqrf( &n, &n, VT, &n, tau, hwork, &lwork, info );
if (i == 1)
blasf77_zcopy( &n2, VT, &ione, R, &ione );
else
blasf77_ztrmm( "l", "u", "n", "n", &n, &n, &c_one, VT, &n, R, &n );
magma_zsetmatrix( n, n, VT, n, dwork, n, queue );
magma_ztrsm( MagmaRight, MagmaUpper, MagmaNoTrans, MagmaNonUnit,
m, n, c_one, dwork, n, dA, ldda, queue );
if (mins > 0.00001f)
cn = maxs/mins;
//fprintf( stderr, "Iteration %d, cond num = %f \n", i, cn );
} while (cn > 10.f);
magma_free_cpu( hwork );
#ifdef COMPLEX
magma_free_cpu( rwork );
#endif
// ================== end of ikind == 1 ===================================================
}
else if (ikind == 2) {
// ================== LAPACK based ===================================================
magma_int_t min_mn = min(m, n);
magma_int_t nb = n;
magmaDoubleComplex_ptr dtau = dwork + 2*n*n;
magmaDoubleComplex_ptr d_T = dwork;
magmaDoubleComplex_ptr ddA = dwork + n*n;
magmaDoubleComplex *tau = work+n*n;
magmablas_zlaset( MagmaFull, n, n, c_zero, c_zero, d_T, n, queue );
magma_zgeqr2x3_gpu( m, n, dA, ldda, dtau, d_T, ddA,
(double*)(dwork+min_mn+2*n*n), info );
magma_zgetmatrix( min_mn, 1, dtau, min_mn, tau, min_mn, queue );
magma_zgetmatrix( n, n, ddA, n, work, n, queue );
magma_zungqr_gpu( m, n, n, dA, ldda, tau, d_T, nb, info );
// ================== end of ikind == 2 ===================================================
}
else if (ikind == 3) {
// ================== MGS ===================================================
for (j = 0; j < n; j++) {
for (i = 0; i < j; i++) {
*work(i, j) = magma_zdotc( m, dA(0,i), 1, dA(0,j), 1, queue );
magma_zaxpy( m, -(*work(i,j)), dA(0,i), 1, dA(0,j), 1, queue );
}
for (i = j; i < n; i++) {
*work(i, j) = MAGMA_Z_ZERO;
}
//*work(j,j) = MAGMA_Z_MAKE( magma_dznrm2( m, dA(0,j), 1), 0., queue );
*work(j,j) = magma_zdotc( m, dA(0,j), 1, dA(0,j), 1, queue );
*work(j,j) = MAGMA_Z_MAKE( sqrt(MAGMA_Z_REAL( *work(j,j) )), 0. );
magma_zscal( m, 1./ *work(j,j), dA(0,j), 1, queue );
}
// ================== end of ikind == 3 ===================================================
}
else if (ikind == 4) {
// ================== Cholesky QR ===================================================
magma_zgemm( MagmaConjTrans, MagmaNoTrans, n, n, m, c_one,
dA, ldda, dA, ldda, c_zero, dwork, n, queue );
magma_zgetmatrix( n, n, dwork, n, work, n, queue );
lapackf77_zpotrf( "u", &n, work, &n, info );
magma_zsetmatrix( n, n, work, n, dwork, n, queue );
magma_ztrsm( MagmaRight, MagmaUpper, MagmaNoTrans, MagmaNonUnit,
m, n, c_one, dwork, n, dA, ldda, queue );
// ================== end of ikind == 4 ===================================================
}
magma_queue_destroy( queue );
return *info;
} /* magma_zgegqr_gpu */
/**
Purpose
-------
ZPOTRF computes the Cholesky factorization of a complex Hermitian
positive definite matrix dA.
The factorization has the form
dA = U**H * U, if UPLO = MagmaUpper, or
dA = L * L**H, if UPLO = MagmaLower,
where U is an upper triangular matrix and L is lower triangular.
This is the block version of the algorithm, calling Level 3 BLAS.
Arguments
---------
@param[in]
uplo magma_uplo_t
- = MagmaUpper: Upper triangle of dA is stored;
- = MagmaLower: Lower triangle of dA is stored.
@param[in]
n INTEGER
The order of the matrix dA. N >= 0.
@param[in,out]
d_lA COMPLEX_16 array of pointers on the GPU, dimension (num_gpus)
On entry, the Hermitian matrix dA distributed over GPUs
(dl_A[d] points to the local matrix on the d-th GPU).
It is distributed in 1D block column or row cyclic (with the
block size of nb) if UPLO = MagmaUpper or MagmaLower, respectively.
If UPLO = MagmaUpper, the leading N-by-N upper triangular
part of dA contains the upper triangular part of the matrix dA,
and the strictly lower triangular part of dA is not referenced.
If UPLO = MagmaLower, the leading N-by-N lower triangular part
of dA contains the lower triangular part of the matrix dA, and
the strictly upper triangular part of dA is not referenced.
\n
On exit, if INFO = 0, the factor U or L from the Cholesky
factorization dA = U**H * U or dA = L * L**H.
@param[in]
ldda INTEGER
The leading dimension of the array dA. LDDA >= max(1,N).
To benefit from coalescent memory accesses LDDA must be
divisible by 16.
@param[out]
info INTEGER
- = 0: successful exit
- < 0: if INFO = -i, the i-th argument had an illegal value
- > 0: if INFO = i, the leading minor of order i is not
positive definite, and the factorization could not be
completed.
@ingroup magma_zposv_comp
********************************************************************/
extern "C" magma_int_t
magma_zpotrf_mgpu_right(magma_int_t num_gpus, magma_uplo_t uplo, magma_int_t n,
magmaDoubleComplex **d_lA, magma_int_t ldda, magma_int_t *info )
{
#define dlA(id, i, j) (d_lA[(id)] + (j) * ldda + (i))
#define dlP(id, i, j) (d_lP[(id)] + (j) * ldda + (i))
#define panel(j) (panel + (j))
#define tmppanel(j) (tmppanel + (j))
#define tmpprevpanel(j) (tmpprevpanel + (j))
#define STREAM_ID(i) (num_streams > 1 ? 1+((i)/nb)%(num_streams-1) : 0)
magmaDoubleComplex z_one = MAGMA_Z_MAKE( 1.0, 0.0 );
magmaDoubleComplex mz_one = MAGMA_Z_MAKE( -1.0, 0.0 );
double one = 1.0;
double m_one = -1.0;
const char* uplo_ = lapack_uplo_const( uplo );
magma_int_t j, nb, d, id, j_local, blkid, crosspoint, prevj, prevtrsmrows, num_streams = 5;
magmaDoubleComplex *panel, *tmppanel0, *tmppanel1, *tmppanel, *tmpprevpanel;
magmaDoubleComplex *d_lP[MagmaMaxGPUs], *dlpanel, *dlpanels[MagmaMaxGPUs];
magma_int_t rows, trsmrows, ngpu, n_local[MagmaMaxGPUs], ldpanel;
magma_queue_t stream[MagmaMaxGPUs][10];
*info = 0;
if ( uplo != MagmaUpper && uplo != MagmaLower ) {
*info = -1;
} else if (n < 0) {
*info = -2;
} else if (ldda < max(1,n)) {
*info = -4;
}
if (*info != 0) {
magma_xerbla( __func__, -(*info) );
return *info;
}
magma_device_t orig_dev;
magma_getdevice( &orig_dev );
magma_queue_t orig_stream;
magmablasGetKernelStream( &orig_stream );
nb = magma_get_zpotrf_nb(n);
ldpanel = ldda;
magma_setdevice(0);
if (MAGMA_SUCCESS != magma_zmalloc_pinned( &panel, 2 * nb * ldpanel )) {
*info = MAGMA_ERR_HOST_ALLOC;
return *info;
}
tmppanel0 = panel;
tmppanel1 = tmppanel0 + nb * ldpanel;
if ((nb <= 1) || (nb >= n)) {
// Use unblocked code.
magma_zgetmatrix( n, n, dlA(0, 0, 0), ldda, panel, ldpanel);
lapackf77_zpotrf( uplo_, &n, panel, &ldpanel, info);
magma_zsetmatrix( n, n, panel, ldpanel, dlA(0, 0, 0), ldda );
} else {
for( d = 0; d < num_gpus; d++ ) {
// local-n and local-ld
n_local[d] = ((n / nb) / num_gpus) * nb;
if (d < (n / nb) % num_gpus)
n_local[d] += nb;
else if (d == (n / nb) % num_gpus)
n_local[d] += n % nb;
magma_setdevice(d);
magma_device_sync();
if (MAGMA_SUCCESS != magma_zmalloc( &d_lP[d], nb * ldda )) {
for( j = 0; j < d; j++ ) {
magma_setdevice(j);
magma_free( d_lP[d] );
}
*info = MAGMA_ERR_DEVICE_ALLOC;
return *info;
}
for( j=0; j < num_streams; j++ ) {
magma_queue_create( &stream[d][j] );
}
}
//#define ENABLE_TIMER
#if defined (ENABLE_TIMER)
real_Double_t therk[4], tmtc, tcchol, tctrsm, tctm, tmnp, tcnp;
real_Double_t ttot_herk[4] = {0,0,0,0}, ttot_mtc = 0, ttot_cchol = 0, ttot_ctrsm = 0, ttot_ctm = 0, ttot_mnp = 0, ttot_cnp = 0;
printf("\n\n %10s %10s %10s %10s %10s %10s %10s %10s %10s %10s %10s %10s %10s %10s %10s\n",
"j", "nb", "row", "mtc", "CPU_np", "panel", "ctrsm", "CH+TRSM", "CPU", "dsyrk[0]", "dsyrk[1]", "dsyrk[2]", "dsyrk[3]", "ctm P", "gpu_np");
printf(" ====================================================================================================\n");
#endif
// Use blocked code.
if (uplo == MagmaUpper) {
printf( " === not supported, yet ===\n" );
} else {
blkid = -1;
if (num_gpus == 4)
crosspoint = n;
else if (num_gpus == 3)
crosspoint = n;
else if (num_gpus == 2)
crosspoint = 20160;
else
crosspoint = 0;
crosspoint = 0; //n; //n -- > gpu always does next panel, 0 --> cpu always does next panel
crosspoint = n;
#if defined (ENABLE_TIMER)
real_Double_t tget = get_time(), tset = 0.0, ttot = 0.0;
#endif
if ( n > nb ) {
// send first panel to cpu
magma_setdevice(0);
tmppanel = tmppanel0;
magma_zgetmatrix_async(n, nb,
dlA(0, 0, 0), ldda,
tmppanel(0), ldpanel,
stream[0][0] );
}
#if defined (ENABLE_TIMER)
for( d=0; d < num_gpus; d++ ) {
magma_setdevice(d);
magma_device_sync();
}
tget = get_time()-tget;
#endif
// Compute the Cholesky factorization A = L*L'
for (j = 0; (j + nb) < n; j += nb) {
#if defined (ENABLE_TIMER)
therk[0] = therk[1] = therk[2] = therk[3] = tmtc = tcchol = tctrsm = tctm = tmnp = tcnp = 0.0;
#endif
blkid += 1;
tmppanel = (blkid % 2 == 0) ? tmppanel0 : tmppanel1;
// Set the gpu number that holds the current panel
id = (j / nb) % num_gpus;
magma_setdevice(id);
// Set the local index where the current panel is
j_local = j / (nb * num_gpus) * nb;
rows = n - j;
// Wait for the panel on cpu
magma_queue_sync( stream[id][0] );
if (j > 0 && prevtrsmrows > crosspoint) {
#if defined (ENABLE_TIMER)
tcnp = get_time();
#endif
tmpprevpanel = ((blkid - 1) % 2) == 0 ? tmppanel0 : tmppanel1;
blasf77_zgemm( MagmaNoTransStr, MagmaConjTransStr,
&rows, &nb, &nb,
&mz_one, tmpprevpanel(j), &ldpanel,
tmpprevpanel(j), &ldpanel,
&z_one, tmppanel(j), &ldpanel );
#if defined (ENABLE_TIMER)
tcnp = get_time() - tcnp;
ttot_cnp += tcnp;
#endif
}
#if defined (ENABLE_TIMER)
tcchol = get_time();
#endif
lapackf77_zpotrf(MagmaLowerStr, &nb, tmppanel(j), &ldpanel, info);
if (*info != 0) {
*info = *info + j;
break;
}
#if defined (ENABLE_TIMER)
tcchol = get_time() - tcchol;
ttot_cchol += tcchol;
tctrsm = get_time();
#endif
trsmrows = rows - nb;
if (trsmrows > 0) {
blasf77_ztrsm(MagmaRightStr, MagmaLowerStr, MagmaConjTransStr, MagmaNonUnitStr,
&trsmrows, &nb,
&z_one, tmppanel(j), &ldpanel,
tmppanel(j + nb), &ldpanel);
}
#if defined (ENABLE_TIMER)
tctrsm = get_time() - tctrsm;
ttot_ctrsm += tctrsm;
tctm = get_time();
#endif
d = (id + 1) % num_gpus;
// send current panel to gpus
for (ngpu = 0; ngpu < num_gpus; ngpu++, d = (d + 1) % num_gpus ) {
magma_int_t myrows = 0;
magma_int_t row_offset = 0;
if ( d == id ) {
dlpanel = dlA(d, j, j_local);
myrows = rows;
row_offset = 0;
} else {
dlpanel = dlP(d, 0, 0);
myrows = trsmrows;
row_offset = nb;
}
if (myrows > 0) {
magma_setdevice(d);
magma_zsetmatrix_async(myrows, nb,
tmppanel(j + row_offset), ldpanel,
dlpanel, ldda, stream[d][0] );
}
}
/* make sure panel is on GPUs */
d = (id + 1) % num_gpus;
for (ngpu = 0; ngpu < num_gpus; ngpu++, d = (d + 1) % num_gpus ) {
magma_setdevice(d);
magma_queue_sync( stream[d][0] );
}
#if defined (ENABLE_TIMER)
tctm = get_time() - tctm;
ttot_ctm += tctm;
#endif
if ( (j + nb) < n) {
magma_int_t offset = 0;
magma_int_t row_offset = 0;
if (j + nb + nb < n) {
d = (id + 1) % num_gpus;
magma_setdevice(d);
magma_int_t j_local2 = (j + nb) / (nb * num_gpus) * nb;
if (trsmrows <= crosspoint) {
#if defined (ENABLE_TIMER)
tmnp = get_time();
#endif
// do gemm on look ahead panel
if ( d == id ) {
dlpanel = dlA(d, j + nb, j_local);
} else {
dlpanel = dlP(d, 0, 0);
}
magmablasSetKernelStream(stream[d][STREAM_ID(j_local2)]);
#define ZHERK_ON_DIAG
#ifdef ZHERK_ON_DIAG
magma_zherk( MagmaLower, MagmaNoTrans,
nb, nb,
m_one, dlpanel, ldda,
one, dlA(d, j + nb, j_local2), ldda);
magma_zgemm( MagmaNoTrans, MagmaConjTrans,
trsmrows-nb, nb, nb,
mz_one, dlpanel+nb, ldda,
dlpanel, ldda,
z_one, dlA(d, j + nb +nb, j_local2), ldda);
#else
magma_zgemm( MagmaNoTrans, MagmaConjTrans,
trsmrows, nb, nb,
mz_one, dlpanel, ldda,
dlpanel, ldda,
z_one, dlA(d, j + nb, j_local2), ldda);
#endif
#if defined (ENABLE_TIMER)
magma_device_sync();
tmnp = get_time() - tmnp;
ttot_mnp += tmnp;
#endif
}
// send next panel to cpu
magma_queue_sync( stream[d][STREAM_ID(j_local2)] ); // make sure lookahead is done
tmppanel = ((blkid+1) % 2 == 0) ? tmppanel0 : tmppanel1;
magma_zgetmatrix_async(rows-nb, nb,
dlA(d, j+nb, j_local2), ldda,
tmppanel(j+nb), ldpanel,
stream[d][0] );
tmppanel = (blkid % 2 == 0) ? tmppanel0 : tmppanel1;
offset = j + nb + nb;
row_offset = nb;
} else {
offset = j + nb;
row_offset = 0;
}
if (n - offset > 0) {
// syrk on multiple gpu
for (d = 0; d < num_gpus; d++ ) {
if ( d == id ) {
dlpanels[d] = dlA(d, j + nb + row_offset, j_local);
} else {
dlpanels[d] = dlP(d, row_offset, 0);
}
}
#if defined (ENABLE_TIMER)
for( d=0; d < num_gpus; d++ ) therk[d] = get_time();
#endif
//magmablasSetKernelStream(stream[d]);
//magma_zherk(MagmaLower, MagmaNoTrans, n - offset, nb,
// m_one, dlpanel, ldda,
// one, &d_lA[d][offset + offset*ldda], ldda );
#ifdef ZHERK_ON_DIAG
magma_zherk_mgpu
#else
magma_zherk_mgpu2
#endif
(num_gpus, MagmaLower, MagmaNoTrans,
nb, n - offset, nb,
m_one, dlpanels, ldda, 0,
one, d_lA, ldda, offset,
num_streams, stream );
#if defined (ENABLE_TIMER)
for( d=0; d < num_gpus; d++ ) {
magma_setdevice(d);
magma_device_sync();
therk[d] = get_time() - therk[d];
ttot_herk[d] += therk[d];
}
#endif
}
prevtrsmrows = trsmrows;
prevj = j;
#if defined (ENABLE_TIMER)
ttot += (tcnp+tcchol+tctrsm+therk[0]+therk[1]+therk[2]+tctm+tmnp);
printf("%10d %10d %10d %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf(%d) %10.3lf\n",
j, nb, rows, tmtc,
tcnp, // gemm
tcchol, // potrf
tctrsm, // trsm
(tcchol + tctrsm),
(tmtc+tcnp+tcchol+tctrsm),
therk[0], therk[1], therk[2], therk[3], // syrk
tctm, // copy panel to GPU
tmnp, // lookahead on GPU
(id + 1) % num_gpus,
(tcnp+tcchol+tctrsm+therk[0]+therk[1]+therk[2]+tctm+tmnp));
fflush(0);
#endif
}
}
for( d = 0; d < num_gpus; d++ ) {
magma_setdevice(d);
for( id=0; id < num_streams; id++ ) {
magma_queue_sync( stream[d][id] );
}
}
#if defined (ENABLE_TIMER)
printf("\n%10d %10d %10d %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf(-) %10.3lf\n",
n, n, 0, ttot_mtc,
ttot_cnp, // gemm
ttot_cchol, // potrf
ttot_ctrsm, // trsm
(ttot_cchol + ttot_ctrsm),
(ttot_mtc+ttot_cnp+ttot_cchol+ttot_ctrsm),
ttot_herk[0], ttot_herk[1], ttot_herk[2], ttot_herk[3], // syrk
ttot_ctm, // copy panel to GPU
ttot_mnp, // lookahead on GPU
(ttot_cnp+ttot_cchol+ttot_ctrsm+ttot_herk[0]+ttot_herk[1]+ttot_herk[2]+ttot_ctm+ttot_mnp));
printf("%10d %10d %10d %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf %10.3lf(-) %10.3lf (ratio)\n",
n, n, 0, ttot_mtc/ttot,
ttot_cnp/ttot, // gemm
ttot_cchol/ttot, // potrf
ttot_ctrsm/ttot, // trsm
(ttot_cchol + ttot_ctrsm)/ttot,
(ttot_mtc+ttot_cnp+ttot_cchol+ttot_ctrsm)/ttot,
ttot_herk[0]/ttot, ttot_herk[1]/ttot, ttot_herk[2]/ttot, ttot_herk[3]/ttot, // syrk
ttot_ctm/ttot, // copy panel to GPU
ttot_mnp/ttot, // lookahead on GPU
(ttot_cnp+ttot_cchol+ttot_ctrsm+ttot_herk[0]+ttot_herk[1]+ttot_herk[2]+ttot_ctm+ttot_mnp)/ttot);
#endif
// cholesky for the last block
if (j < n && *info == 0) {
rows = n - j;
id = (j / nb) % num_gpus;
// Set the local index where the current panel is
j_local = j / (nb * num_gpus) * nb;
magma_setdevice(id);
#if defined (ENABLE_TIMER)
tset = get_time();
#endif
magma_zgetmatrix(rows, rows, dlA(id, j, j_local), ldda, panel(j), ldpanel);
lapackf77_zpotrf(MagmaLowerStr, &rows, panel(j), &ldpanel, info);
magma_zsetmatrix(rows, rows, panel(j), ldpanel, dlA(id, j, j_local), ldda);
#if defined (ENABLE_TIMER)
tset = get_time() - tset;
#endif
}
#if defined (ENABLE_TIMER)
printf( " matrix_get,set: %10.3lf %10.3lf -> %10.3lf\n",tget,tset,ttot+tget+tset );
#endif
} // end of else not upper
// clean up
for( d = 0; d < num_gpus; d++ ) {
magma_setdevice(d);
for( j=0; j < num_streams; j++ ) {
magma_queue_destroy( stream[d][j] );
}
magma_free( d_lP[d] );
}
} // end of not lapack
// free workspace
magma_free_pinned( panel );
magma_setdevice( orig_dev );
magmablasSetKernelStream( orig_stream );
return *info;
} /* magma_zpotrf_mgpu_right */
extern "C" magma_int_t
magma_zpotrf2_mgpu(
int num_gpus, magma_uplo_t uplo, magma_int_t m, magma_int_t n,
magma_int_t off_i, magma_int_t off_j, magma_int_t nb,
magmaDoubleComplex_ptr *d_lA, size_t d_lA_offset, magma_int_t ldda,
magmaDoubleComplex_ptr *d_lP, magma_int_t lddp,
magmaDoubleComplex *a, magma_int_t lda, magma_int_t h,
magma_queue_t *queues,
magma_int_t *info )
{
/* -- clMAGMA (version 1.3.0) --
Univ. of Tennessee, Knoxville
Univ. of California, Berkeley
Univ. of Colorado, Denver
@date November 2014
Purpose
=======
ZPOTRF computes the Cholesky factorization of a complex Hermitian
positive definite matrix dA.
The factorization has the form
dA = U**H * U, if UPLO = 'U', or
dA = L * L**H, if UPLO = 'L',
where U is an upper triangular matrix and L is lower triangular.
This is the block version of the algorithm, calling Level 3 BLAS.
Arguments
=========
UPLO (input) CHARACTER*1
= 'U': Upper triangle of dA is stored;
= 'L': Lower triangle of dA is stored.
N (input) INTEGER
The order of the matrix dA. N >= 0.
dA (input/output) COMPLEX_16 array on the GPU, dimension (LDDA,N)
On entry, the Hermitian matrix dA. If UPLO = 'U', the leading
N-by-N upper triangular part of dA contains the upper
triangular part of the matrix dA, and the strictly lower
triangular part of dA is not referenced. If UPLO = 'L', the
leading N-by-N lower triangular part of dA contains the lower
triangular part of the matrix dA, and the strictly upper
triangular part of dA is not referenced.
On exit, if INFO = 0, the factor U or L from the Cholesky
factorization dA = U**H * U or dA = L * L**H.
LDDA (input) INTEGER
The leading dimension of the array dA. LDDA >= max(1,N).
To benefit from coalescent memory accesses LDDA must be
divisible by 16.
INFO (output) INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value
> 0: if INFO = i, the leading minor of order i is not
positive definite, and the factorization could not be
completed.
===================================================================== */
magma_int_t j, jb, nb0, nb2, dd, d, id, j_local, j_local2, buf;
magmaDoubleComplex c_one = MAGMA_Z_ONE;
magmaDoubleComplex c_neg_one = MAGMA_Z_NEG_ONE;
double d_one = 1.0;
double d_neg_one = -1.0;
magmaDoubleComplex_ptr dlpanel;
size_t dlpanel_offset;
magma_int_t n_local[MagmaMaxGPUs], ldpanel;
magma_event_t* events[MagmaMaxGPUs][2];
*info = 0;
if ( (uplo != MagmaUpper) && (uplo != MagmaLower) ) {
*info = -1;
} else if (n < 0) {
*info = -2;
} else if ((uplo != MagmaUpper) && num_gpus*ldda < max(1,n)) {
*info = -4;
} else if ((uplo == MagmaUpper) && ldda < max(1,m)) {
*info = -4;
}
if (*info != 0) {
magma_xerbla( __func__, -(*info) );
return *info;
}
{
for( d=0; d<num_gpus; d++ ) {
/* local-n and local-ld */
if (uplo == MagmaUpper) {
n_local[d] = ((n/nb)/num_gpus)*nb;
if (d < (n/nb)%num_gpus)
n_local[d] += nb;
else if (d == (n/nb)%num_gpus)
n_local[d] += n%nb;
} else {
n_local[d] = ((m/nb)/num_gpus)*nb;
if (d < (m/nb)%num_gpus)
n_local[d] += nb;
else if (d == (m/nb)%num_gpus)
n_local[d] += m%nb;
}
}
/* Use blocked code. */
if (uplo == MagmaUpper)
{
/* ---------------------------------------------- */
/* Upper-triangular case */
/* > Compute the Cholesky factorization A = U'*U. */
/* ---------------------------------------------- */
printf("support Lower case only!\n");
} else {
trace_init(1, num_gpus, 2, queues);
/* -------------------------------------------- */
/* Lower-triangular case */
/* Compute the Cholesky factorization A = L*L'. */
/* -------------------------------------------- */
// try one queue per device firstly!
for (j=0; j<n; j+=nb) {
/* Set the GPU number that holds the current panel */
id = (j/nb)%num_gpus;
buf = (j/nb)%num_gpus;
/* Set the local index where the current panel is */
j_local = j/(nb*num_gpus);
jb = min(nb, (n-j));
if( j > 0 ) {
/* needed on pluto... */
//magma_setdevice(id);
magma_queue_sync( queues[id*2] ); // wait for the column on CPU
/* broadcast offdiagonal row to all gpus */
d = (j/nb+1)%num_gpus;
for( dd=0; dd<num_gpus; dd++ ) {
if( d != id ) {
/* wait for it on CPU */
//magma_queue_sync( queues[d*2] );
/* send it to GPU */
trace_gpu_start(d, 0, "comm_set", "set");
events[d][0] = trace_gpu_end(d, 0);
magma_zsetmatrix_async( jb, j,
Alo(j,0), 0, lda,
dlPT(d,0,jb,buf), nb,
queues[d*2], events[d][0] );
clFlush(queues[d*2]);
}
d = (d+1)%num_gpus;
}
}
/* Update the current diagonal block */
if( j > 0 ) {
trace_gpu_start(id, 1, "herk", "herk");
events[id][1] = trace_gpu_end(id, 1);
magma_zherk_trace(MagmaLower, MagmaNoTrans, jb, j,
d_neg_one, dlA(id, nb*j_local, 0), ldda,
d_one, dlA(id, nb*j_local, j), ldda,
queues[id*2+1], events[id][1]);
// magma_queue_sync( queues[id*2+1] ); // wait for syrk
clWaitForEvents(1, events[id][1]);
}
/* send the diagonal to cpu */
trace_gpu_start(id, 0, "comm_get", "get");
events[id][0] = trace_gpu_end(id, 0);
magma_zgetmatrix_async( jb, jb,
dlA(id, nb*j_local, j), ldda,
Alo(j,j), 0, lda,
queues[id*2], events[id][0] );
clFlush(queues[id*2]);
/* update the offdiagonal blocks */
if ( j > 0 ) {
/* compute the block-rows of the panel */
d = (j/nb+1)%num_gpus;
for( dd=0; dd<num_gpus; dd++ ) {
j_local2 = j_local+1;
if( d > id ) j_local2 --;
nb0 = nb*j_local2;
if( nb0 < n_local[d] ) {
if( d != id ) {
//dlpanel = dlPT(d);
dlpanel = d_lP[d];
dlpanel_offset = dlPT_offset(0, jb, buf);
ldpanel = nb;
/* wait for offdiagonal row */
magma_queue_sync(queues[d*2]);
} else {
dlpanel = d_lA[d];
dlpanel_offset = dlA_offset(nb*j_local, 0);
ldpanel = ldda;
}
trace_gpu_start(d, 1, "gemm", "gemm");
events[d][1] = trace_gpu_end(d, 1);
magma_zgemm_trace( MagmaNoTrans, MagmaConjTrans,
n_local[d]-nb0, jb, j,
c_neg_one, dlA(d, nb0, 0), ldda,
dlpanel, dlpanel_offset, ldpanel,
c_one, dlA(d, nb0, j), ldda,
queues[d*2+1], events[d][1]);
}
d = (d+1)%num_gpus;
}
}
/* send the diagonal to cpu */
/*
trace_gpu_start(id, 0, "comm_get", "get");
events[id][0] = trace_gpu_end(id, 0);
magma_zgetmatrix_async( jb, jb,
dlA(id, nb*j_local, j), ldda,
Alo(j,j), 0, lda,
queues[id*2], events[id][0] );
clFlush(queues[id*2]);
*/
/* factor the diagonal */
magma_queue_sync( queues[id*2] );
trace_cpu_start(0, "potrf", "potrf");
lapackf77_zpotrf(MagmaLowerStr, &jb, Alo(j,j), &lda, info);
trace_cpu_end(0);
if (*info != 0) {
printf("row number: %d\n", j);
*info = *info + j;
break;
}
/* send the diagonal to gpus */
if ( (j+jb) < m ) {
d = (j/nb+1)%num_gpus;
for( dd=0; dd<num_gpus; dd++ ) {
if( d == id ) {
dlpanel = d_lA[d];
dlpanel_offset = dlA_offset(nb*j_local, j);
ldpanel = ldda;
} else {
//dlpanel = dlPT(d);
dlpanel = d_lP[d];
dlpanel_offset = dlPT_offset(0, 0, buf);
ldpanel = nb;
}
trace_gpu_start(d, 0, "comm_set", "set");
events[d][0] = trace_gpu_end(d, 0);
magma_zsetmatrix_async( jb, jb,
Alo(j,j), 0, lda,
dlpanel, dlpanel_offset, ldpanel,
queues[d*2], events[d][0] );
clFlush(queues[d*2]);
d = (d+1)%num_gpus;
}
} else {
trace_gpu_start(id, 0, "comm_set", "set");
events[id][0] = trace_gpu_end(id, 0);
magma_zsetmatrix_async( jb, jb,
Alo(j,j), 0, lda,
dlA(id, nb*j_local, j), ldda,
queues[id*2], events[id][0] );
clFlush(queues[id*2]);
}
/* factorize off-diagonal blocks */
if ( (j+jb) < m ) {
d = (j/nb+1)%num_gpus;
for( dd=0; dd<num_gpus; dd++ ) {
/* next column */
j_local2 = j_local+1;
if( d > id ) j_local2--;
if( d == id ) {
dlpanel = d_lA[d];
dlpanel_offset = dlA_offset(nb*j_local, j);
ldpanel = ldda;
} else {
//dlpanel = dlPT(d);
dlpanel = d_lP[d];
dlpanel_offset = dlPT_offset(0, 0, buf);
ldpanel = nb;
}
nb2 = n_local[d] - j_local2*nb;
nb0 = min(nb, nb2 );
magma_queue_sync(queues[d*2]);
// wait for the diagonal
if( j+jb < n && d == (j/nb+1)%num_gpus ) {
/* owns the next column, look-ahead the column */
trace_gpu_start(d, 1, "trsm", "trsm");
events[d][1] = trace_gpu_end(d, 1);
magma_ztrsm_trace( MagmaRight, MagmaLower, MagmaConjTrans, MagmaNonUnit,
nb0, jb, c_one,
dlpanel, dlpanel_offset, ldpanel,
dlA(d, nb*j_local2, j), ldda,
queues[d*2+1], events[d][1]);
/* send the column to cpu */
if( j+jb < n ) {
magma_queue_sync( queues[d*2+1] ); // wait for lookahead
trace_gpu_start(d, 0, "comm_get", "get");
events[d][0] = trace_gpu_end(d, 0);
magma_zgetmatrix_async( nb0, j+jb,
dlA(d, nb*j_local2, 0), ldda,
Alo(j+jb,0), 0, lda,
queues[d*2], events[d][0]);
clFlush(queues[d*2]);
}
/* update the remaining blocks */
nb2 = nb2 - nb0;
trace_gpu_start(d, 1, "trsm", "trsm");
events[d][1] = trace_gpu_end(d, 1);
magma_ztrsm_trace( MagmaRight, MagmaLower, MagmaConjTrans, MagmaNonUnit,
nb2, jb, c_one,
dlpanel, dlpanel_offset, ldpanel,
dlA(d, nb*j_local2+nb0, j), ldda,
queues[d*2+1], events[d][1]);
} else if( nb2 > 0 ) {
/* update the entire trailing matrix */
trace_gpu_start(d, 1, "trsm", "trsm");
events[d][1] = trace_gpu_end(d, 1);
magma_ztrsm_trace( MagmaRight, MagmaLower, MagmaConjTrans, MagmaNonUnit,
nb2, jb, c_one,
dlpanel, dlpanel_offset, ldpanel,
dlA(d, nb*j_local2, j), ldda,
queues[d*2+1], events[d][1]);
}
d = (d+1)%num_gpus;
}
}
}
} /* end of else not upper */
/* clean up */
for( d=0; d<num_gpus; d++ ) {
magma_queue_sync( queues[d*2] );
magma_queue_sync( queues[d*2+1] );
}
trace_finalize("dpotrf2_mgpu.svg", "trace.css");
} /* end of not lapack */
return *info;
} /* magma_zpotrf_mgpu */
extern "C" magma_int_t
magma_zpotrf2_mgpu(int num_gpus, char uplo, magma_int_t m, magma_int_t n,
magma_int_t off_i, magma_int_t off_j, magma_int_t nb,
magmaDoubleComplex **d_lA, magma_int_t ldda,
magmaDoubleComplex **d_lP, magma_int_t lddp,
magmaDoubleComplex *a, magma_int_t lda, magma_int_t h,
magma_queue_t stream[][3], magma_event_t event[][5],
magma_int_t *info )
{
/* -- MAGMA (version 1.4.0) --
Univ. of Tennessee, Knoxville
Univ. of California, Berkeley
Univ. of Colorado, Denver
August 2013
Purpose
=======
ZPOTRF computes the Cholesky factorization of a complex Hermitian
positive definite matrix dA.
The factorization has the form
dA = U**H * U, if UPLO = 'U', or
dA = L * L**H, if UPLO = 'L',
where U is an upper triangular matrix and L is lower triangular.
This is the block version of the algorithm, calling Level 3 BLAS.
Arguments
=========
UPLO (input) CHARACTER*1
= 'U': Upper triangle of dA is stored;
= 'L': Lower triangle of dA is stored.
N (input) INTEGER
The order of the matrix dA. N >= 0.
dA (input/output) COMPLEX_16 array on the GPU, dimension (LDDA,N)
On entry, the Hermitian matrix dA. If UPLO = 'U', the leading
N-by-N upper triangular part of dA contains the upper
triangular part of the matrix dA, and the strictly lower
triangular part of dA is not referenced. If UPLO = 'L', the
leading N-by-N lower triangular part of dA contains the lower
triangular part of the matrix dA, and the strictly upper
triangular part of dA is not referenced.
On exit, if INFO = 0, the factor U or L from the Cholesky
factorization dA = U**H * U or dA = L * L**H.
LDDA (input) INTEGER
The leading dimension of the array dA. LDDA >= max(1,N).
To benefit from coalescent memory accesses LDDA must be
dividable by 16.
INFO (output) INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value
> 0: if INFO = i, the leading minor of order i is not
positive definite, and the factorization could not be
completed.
===================================================================== */
magma_int_t j, jb, nb0, nb2, dd, d, id, j_local, j_local2, buf;
char uplo_[2] = {uplo, 0};
magmaDoubleComplex c_one = MAGMA_Z_ONE;
magmaDoubleComplex c_neg_one = MAGMA_Z_NEG_ONE;
double d_one = 1.0;
double d_neg_one = -1.0;
int upper = lapackf77_lsame(uplo_, "U");
magmaDoubleComplex *dlpanel;
//magma_event_t event0[MagmaMaxGPUs], // syrk
// event1[MagmaMaxGPUs], // send off-diagonal
// event2[MagmaMaxGPUs], // send diagonal
// event3[MagmaMaxGPUs]; // trsm
magma_int_t n_local[MagmaMaxGPUs], ldpanel;
int stream0 = 0, stream1 = 1;
#ifdef ZTRSM_WORK
magmaDoubleComplex *d_dinvA[MagmaMaxGPUs][2], *d_x[MagmaMaxGPUs][2]; /* used by ztrsm_work */
#endif
*info = 0;
if ( (! upper) && (! lapackf77_lsame(uplo_, "L")) ) {
*info = -1;
} else if (n < 0) {
*info = -2;
} else if (!upper && num_gpus*ldda < max(1,n)) {
*info = -4;
} else if (upper && ldda < max(1,m)) {
*info = -4;
}
if (*info != 0) {
magma_xerbla( __func__, -(*info) );
return *info;
}
for( d=0; d<num_gpus; d++ ) {
/* local-n and local-ld */
if (upper) {
n_local[d] = ((n/nb)/num_gpus)*nb;
if (d < (n/nb)%num_gpus)
n_local[d] += nb;
else if (d == (n/nb)%num_gpus)
n_local[d] += n%nb;
} else {
n_local[d] = ((m/nb)/num_gpus)*nb;
if (d < (m/nb)%num_gpus)
n_local[d] += nb;
else if (d == (m/nb)%num_gpus)
n_local[d] += m%nb;
}
//magma_setdevice(d);
//magma_event_create( &event0[d] );
//magma_event_create( &event1[d] );
//magma_event_create( &event2[d] );
//magma_event_create( &event3[d] );
}
magma_setdevice(0);
/* == initialize the trace */
trace_init( 1, num_gpus, 3, stream );
/* Use blocked code. */
if (upper) {
/* ---------------------------------------------- */
/* Upper-triangular case */
/* > Compute the Cholesky factorization A = U'*U. */
/* ---------------------------------------------- */
#if defined(PRECISION_d) && defined(ZTRSM_WORK)
/* invert the diagonals
* Allocate device memory for the inversed diagonal blocks, size=m*NB
*/
for( d=0; d<num_gpus; d++ ) {
magma_setdevice(d);
for( j=0; j<2; j++ ) {
magma_zmalloc( &d_dinvA[d][j], nb*nb );
magma_zmalloc( &d_x[d][j], n*nb );
cudaMemset(d_dinvA[d][j], 0, nb*nb*sizeof(magmaDoubleComplex));
cudaMemset(d_x[d][j], 0, n*nb*sizeof(magmaDoubleComplex));
}
}
magma_setdevice(0);
#endif
for (j=0; j<m; j+=nb) {
/* Set the GPU number that holds the current panel */
id = (j/nb)%num_gpus;
buf = (j/nb)%num_gpus;
/* Set the local index where the current panel is */
j_local = j/(nb*num_gpus);
jb = min(nb, (m-j));
if( j > 0 ) {
/* needed on pluto... */
magma_setdevice(id);
magma_queue_sync( stream[id][stream0] ); // wait for the column on CPU
/* broadcast off-diagonal column to all gpus */
d = (j/nb+1)%num_gpus;
for( dd=0; dd<num_gpus; dd++ ) {
if( d != id ) {
magma_setdevice(d);
/* wait for it on CPU */
magma_queue_wait_event( stream[d][stream0], event[id][1] );
/* send it to GPU */
trace_gpu_start( d, stream0, "comm", "rows to GPUs" );
magma_zsetmatrix_async( j, jb,
Aup(0,j), lda,
dlP(d,jb,0,buf), lddp,
stream[d][stream0] );
trace_gpu_end( d, stream0 );
magma_event_record( event[d][1], stream[d][stream0] );
}
d = (d+1)%num_gpus;
}
}
/* Update the current diagonal block */
magma_setdevice(id);
if( j > 0 ) {
magmablasSetKernelStream(stream[id][stream1]);
trace_gpu_start( id, stream1, "syrk", "syrk" );
magma_zherk(MagmaUpper, MagmaConjTrans, jb, j,
d_neg_one, dlA(id, 0, nb*j_local), ldda,
d_one, dlA(id, j, nb*j_local), ldda);
trace_gpu_end( id, stream1 );
magma_event_record( event[id][0], stream[id][stream1] );
}
/* send the diagonal to cpu */
magma_queue_wait_event( stream[id][stream0], event[id][0] ); // wait for syrk
trace_gpu_start( id, stream0, "comm", "D to CPU" );
magma_zgetmatrix_async( jb, jb,
dlA(id, j, nb*j_local), ldda,
Aup(j,j), lda,
stream[id][stream0] );
trace_gpu_end( id, stream0 );
if ( j > 0 ) {
/* Compute the local block column of the panel. */
d = (j/nb+1)%num_gpus;
for( dd=0; dd<num_gpus; dd++ ) {
j_local2 = j_local+1;
if( d > id ) j_local2 --;
nb0 = nb*j_local2;
if( n_local[d] > nb0 ) {
/* wait for the off-diagonal */
if( d != id ) {
//magma_queue_sync( stream[id][3] );
dlpanel = dlP(d, jb, 0, buf);
ldpanel = lddp;
/* wait for the offdiagonal column */
magma_queue_wait_event( stream[d][stream1], event[d][1] );
} else {
dlpanel = dlA(d, 0, nb*j_local);
ldpanel = ldda;
}
/* update the panel */
magma_setdevice(d);
magmablasSetKernelStream(stream[d][stream1]);
trace_gpu_start( d, stream1, "gemm", "gemm" );
magma_zgemm(MagmaConjTrans, MagmaNoTrans,
jb, n_local[d]-nb0, j,
c_neg_one, dlpanel, ldpanel,
dlA(d, 0, nb0), ldda,
c_one, dlA(d, j, nb0), ldda);
trace_gpu_end( d, stream1 );
}
d = (d+1)%num_gpus;
}
}
/* factor the diagonal */
magma_setdevice(id);
magma_queue_sync( stream[id][stream0] ); // wait for the diagonal
trace_cpu_start( 0, "getrf", "getrf" );
lapackf77_zpotrf(MagmaUpperStr, &jb, Aup(j,j), &lda, info);
trace_cpu_end( 0 );
if (*info != 0) {
*info = *info + j;
break;
}
/* send the diagonal to gpus */
if ( (j+jb) < n) {
d = (j/nb+1)%num_gpus;
for( dd=0; dd<num_gpus; dd++ ) {
magma_setdevice(d);
if( d == id ) {
dlpanel = dlA(d, j, nb*j_local);
ldpanel = ldda;
} else {
dlpanel = dlP(d, 0, 0, buf);
ldpanel = lddp;
}
trace_gpu_start( d, stream0, "comm", "D to GPUs" );
magma_zsetmatrix_async( jb, jb,
Aup(j,j), lda,
dlpanel, ldpanel,
stream[d][stream0] );
trace_gpu_end( d, stream0 );
magma_event_record( event[d][2], stream[d][stream0] );
d = (d+1)%num_gpus;
}
} else {
magma_setdevice(id);
trace_gpu_start( id, stream0, "comm", "D to GPUs" );
magma_zsetmatrix_async( jb, jb,
Aup(j,j), lda,
dlA(id, j, nb*j_local), ldda,
stream[id][stream0] );
trace_gpu_end( id, stream0 );
}
/* panel-factorize the off-diagonal */
if ( (j+jb) < n) {
d = (j/nb+1)%num_gpus;
for( dd=0; dd<num_gpus; dd++ ) {
/* next column */
j_local2 = j_local+1;
if( d > id ) j_local2--;
if( d == id ) {
dlpanel = dlA(d, j, nb*j_local);
ldpanel = ldda;
} else {
dlpanel = dlP(d, 0, 0, buf);
ldpanel = lddp;
}
nb2 = n_local[d]-nb*j_local2;
nb0 = min(nb, nb2 );
magma_setdevice(d);
magmablasSetKernelStream(stream[d][stream1]);
magma_queue_wait_event( stream[d][stream1], event[d][2] ); // wait for the diagonal
if( j+jb < m && d == (j/nb+1)%num_gpus ) {
/* owns the next column, look-ahead the column */
trace_gpu_start( d, stream1, "trsm", "trsm" );
#if defined(PRECISION_d) && defined(ZTRSM_WORK)
magmablas_ztrsm_work( MagmaLeft, MagmaUpper, MagmaConjTrans, MagmaNonUnit,
jb, nb0, c_one,
dlpanel, ldpanel,
dlA(d, j, nb*j_local2), ldda,
d_dinvA[d][0], d_x[d][0] );
/*nb2 = n_local[d] - j_local2*nb;
magmablas_ztrsm_work( MagmaLeft, MagmaUpper, MagmaConjTrans, MagmaNonUnit,
jb, nb2, c_one,
dlpanel, ldpanel,
dlA(d, j, nb*j_local2), ldda,
d_dinvA[d], d_x[d] );*/
#else
/*nb2 = n_local[d] - j_local2*nb;
magma_ztrsm( MagmaLeft, MagmaUpper, MagmaConjTrans, MagmaNonUnit,
jb, nb2, c_one,
dlpanel, ldda,
dlA(d, j, nb*j_local2), ldda);
*/
magma_ztrsm( MagmaLeft, MagmaUpper, MagmaConjTrans, MagmaNonUnit,
jb, nb0, c_one,
dlpanel, ldpanel,
dlA(d, j, nb*j_local2), ldda);
#endif
trace_gpu_end( d, stream1 );
magma_event_record( event[d][3], stream[d][stream1] );
/* send the column to cpu */
if( j+jb < m ) {
trace_gpu_start( d, stream0, "comm", "rows to CPU" );
magma_queue_wait_event( stream[d][stream0], event[d][3] ); // wait for lookahead
magma_zgetmatrix_async( (j+jb), nb0,
dlA(d, 0, nb*j_local2), ldda,
Aup(0,j+jb), lda,
stream[d][stream0] );
trace_gpu_end( d, stream0 );
magma_event_record( event[d][1], stream[d][stream0] );
}
/* update the remaining blocks */
nb2 = nb2 - nb0;
#if defined(PRECISION_d) && defined(ZTRSM_WORK)
magmablas_ztrsm_work( MagmaLeft, MagmaUpper, MagmaConjTrans, MagmaNonUnit,
jb, nb2, c_one,
dlpanel, ldpanel,
dlA(d, j, nb*j_local2+nb0), ldda,
d_dinvA[d][1], d_x[d][1] );
#else
magma_ztrsm( MagmaLeft, MagmaUpper, MagmaConjTrans, MagmaNonUnit,
jb, nb2, c_one,
dlpanel, ldpanel,
dlA(d, j, nb*j_local2+nb0), ldda);
#endif
} else if( nb2 > 0 ) {
/* update the entire trailing matrix */
trace_gpu_start( d, stream1, "trsm", "trsm" );
#if defined(PRECISION_d) && defined(ZTRSM_WORK)
magmablas_ztrsm_work( MagmaLeft, MagmaUpper, MagmaConjTrans, MagmaNonUnit,
jb, nb2, c_one,
dlpanel, ldpanel,
dlA(d, j, nb*j_local2), ldda,
d_dinvA[d][1], d_x[d][1] );
#else
magma_ztrsm( MagmaLeft, MagmaUpper, MagmaConjTrans, MagmaNonUnit,
jb, nb2, c_one,
dlpanel, ldpanel,
dlA(d, j, nb*j_local2), ldda);
#endif
trace_gpu_end( d, stream1 );
}
d = (d+1)%num_gpus;
}
} /* end of ztrsm */
} /* end of for j=1, .., n */
} else {
/* -------------------------------------------- */
/* Lower-triangular case */
/* Compute the Cholesky factorization A = L*L'. */
/* -------------------------------------------- */
#if defined(PRECISION_d) && defined(ZTRSM_WORK)
/*
* Allocate device memory for the inversed diagonal blocks, size=N*BLOCK_SIZE
*/
for( d=0; d<num_gpus; d++ ) {
magma_setdevice(d);
for( j=0; j<2; j++ ) {
magma_zmalloc( &d_dinvA[d][j], nb*nb );
magma_zmalloc( &d_x[d][j], nb*m );
cudaMemset(d_dinvA[d][j], 0, nb*nb*sizeof(magmaDoubleComplex));
cudaMemset(d_x[d][j], 0, nb* m*sizeof(magmaDoubleComplex));
}
}
magma_setdevice(0);
#endif
for (j=0; j<n; j+=nb) {
/* Set the GPU number that holds the current panel */
id = (j/nb)%num_gpus;
buf = (j/nb)%num_gpus;
/* Set the local index where the current panel is */
j_local = j/(nb*num_gpus);
jb = min(nb, (n-j));
if( j > 0 ) {
/* needed on pluto... */
magma_setdevice(id);
magma_queue_sync( stream[id][stream0] ); // wait for the column on CPU
/* broadcast offdiagonal row to all gpus */
d = (j/nb+1)%num_gpus;
for( dd=0; dd<num_gpus; dd++ ) {
if( d != id ) {
magma_setdevice(d);
/* wait for it on CPU */
magma_queue_wait_event( stream[d][stream0], event[id][1] );
/* send it to GPU */
magma_zsetmatrix_async( jb, j,
Alo(j,0), lda,
dlPT(d,0,jb,buf), nb,
stream[d][stream0] );
magma_event_record( event[d][1], stream[d][stream0] );
}
d = (d+1)%num_gpus;
}
}
/* Update the current diagonal block */
magma_setdevice(id);
if( j > 0 ) {
magmablasSetKernelStream(stream[id][stream1]);
magma_zherk(MagmaLower, MagmaNoTrans, jb, j,
d_neg_one, dlA(id, nb*j_local, 0), ldda,
d_one, dlA(id, nb*j_local, j), ldda);
magma_event_record( event[id][0], stream[id][stream1] );
}
/* send the diagonal to cpu */
magma_queue_wait_event( stream[id][stream0], event[id][0] ); // wait for syrk
magma_zgetmatrix_async( jb, jb,
dlA(id, nb*j_local, j), ldda,
Alo(j,j), lda,
stream[id][stream0] );
/* update the offdiagonal blocks */
if ( j > 0 ) {
/* compute the block-rows of the panel */
d = (j/nb+1)%num_gpus;
for( dd=0; dd<num_gpus; dd++ ) {
j_local2 = j_local+1;
if( d > id ) j_local2 --;
nb0 = nb*j_local2;
if( nb0 < n_local[d] ) {
if( d != id ) {
dlpanel = dlPT(d, 0, jb, buf);
ldpanel = nb;
/* wait for offdiagonal row */
magma_queue_wait_event( stream[d][stream1], event[d][1] );
} else {
dlpanel = dlA(d, nb*j_local, 0);
ldpanel = ldda;
}
magma_setdevice(d);
magmablasSetKernelStream(stream[d][stream1]);
magma_zgemm( MagmaNoTrans, MagmaConjTrans,
n_local[d]-nb0, jb, j,
c_neg_one, dlA(d, nb0, 0), ldda,
dlpanel, ldpanel,
c_one, dlA(d, nb0, j), ldda);
}
d = (d+1)%num_gpus;
}
}
/* factor the diagonal */
magma_setdevice(id);
magma_queue_sync( stream[id][stream0] );
lapackf77_zpotrf(MagmaLowerStr, &jb, Alo(j,j), &lda, info);
if (*info != 0) {
*info = *info + j;
break;
}
/* send the diagonal to gpus */
if ( (j+jb) < m ) {
d = (j/nb+1)%num_gpus;
for( dd=0; dd<num_gpus; dd++ ) {
magma_setdevice(d);
if( d == id ) {
dlpanel = dlA(d, nb*j_local, j);
ldpanel = ldda;
} else {
dlpanel = dlPT(d, 0, 0, buf);
ldpanel = nb;
}
magma_zsetmatrix_async( jb, jb,
Alo(j,j), lda,
dlpanel, ldpanel,
stream[d][stream0] );
magma_event_record( event[d][2], stream[d][stream0] );
d = (d+1)%num_gpus;
}
} else {
magma_setdevice(id);
magma_zsetmatrix_async( jb, jb,
Alo(j,j), lda,
dlA(id, nb*j_local, j), ldda,
stream[id][stream0] );
}
/* factorize off-diagonal blocks */
if ( (j+jb) < m ) {
d = (j/nb+1)%num_gpus;
for( dd=0; dd<num_gpus; dd++ ) {
/* next column */
j_local2 = j_local+1;
if( d > id ) j_local2--;
if( d == id ) {
dlpanel = dlA(d, nb*j_local, j);
ldpanel = ldda;
} else {
dlpanel = dlPT(d, 0, 0, buf);
ldpanel = nb;
}
nb2 = n_local[d] - j_local2*nb;
nb0 = min(nb, nb2 );
magma_setdevice(d);
magmablasSetKernelStream(stream[d][stream1]);
magma_queue_wait_event( stream[d][stream1], event[d][2] ); // wait for the diagonal
if( j+jb < n && d == (j/nb+1)%num_gpus ) {
/* owns the next column, look-ahead the column */
#if defined(PRECISION_d) && defined(ZTRSM_WORK)
magmablas_ztrsm_work( MagmaRight, MagmaLower, MagmaConjTrans, MagmaNonUnit,
nb0, jb, c_one,
dlpanel, ldpanel,
dlA(d, nb*j_local2, j), ldda,
d_dinvA[d][0], d_x[d][0]);
#else
magma_ztrsm( MagmaRight, MagmaLower, MagmaConjTrans, MagmaNonUnit,
nb0, jb, c_one,
dlpanel, ldpanel,
dlA(d, nb*j_local2, j), ldda);
#endif
magma_event_record( event[d][3], stream[d][stream1] );
/* send the column to cpu */
if( j+jb < n ) {
magma_queue_wait_event( stream[d][stream0], event[d][3] ); // wait for lookahead
magma_zgetmatrix_async( nb0, j+jb,
dlA(d, nb*j_local2, 0), ldda,
Alo(j+jb,0), lda,
stream[d][stream0] );
magma_event_record( event[d][1], stream[d][stream0] );
}
/* update the remaining blocks */
nb2 = nb2 - nb0;
#if defined(PRECISION_d) && defined(ZTRSM_WORK)
magmablas_ztrsm_work( MagmaRight, MagmaLower, MagmaConjTrans, MagmaNonUnit,
nb2, jb, c_one,
dlpanel, ldpanel,
dlA(d, nb*j_local2+nb0, j), ldda,
d_dinvA[d][1], d_x[d][1] );
#else
magma_ztrsm( MagmaRight, MagmaLower, MagmaConjTrans, MagmaNonUnit,
nb2, jb, c_one,
dlpanel, ldpanel,
dlA(d, nb*j_local2+nb0, j), ldda);
#endif
} else if( nb2 > 0 ) {
/* update the entire trailing matrix */
#if defined(PRECISION_d) && defined(ZTRSM_WORK)
magmablas_ztrsm_work( MagmaRight, MagmaLower, MagmaConjTrans, MagmaNonUnit,
nb2, jb, c_one,
dlpanel, ldpanel,
dlA(d, nb*j_local2, j), ldda,
d_dinvA[d][1], d_x[d][1] );
#else
magma_ztrsm( MagmaRight, MagmaLower, MagmaConjTrans, MagmaNonUnit,
nb2, jb, c_one,
dlpanel, ldpanel,
dlA(d, nb*j_local2, j), ldda);
#endif
}
d = (d+1)%num_gpus;
}
}
}
} /* end of else not upper */
/* == finalize the trace == */
trace_finalize( "zpotrf.svg","trace.css" );
/* clean up */
for( d=0; d<num_gpus; d++ ) {
magma_setdevice(d);
magma_queue_sync( stream[d][0] );
magma_queue_sync( stream[d][1] );
magmablasSetKernelStream(NULL);
//magma_event_destroy( event0[d] );
//magma_event_destroy( event1[d] );
//magma_event_destroy( event2[d] );
//magma_event_destroy( event3[d] );
}
magma_setdevice(0);
return *info;
} /* magma_zpotrf_mgpu */
extern "C" magma_int_t
magma_zpotrf3_mgpu(magma_int_t num_gpus, char uplo, magma_int_t m, magma_int_t n,
magma_int_t off_i, magma_int_t off_j, magma_int_t nb,
magmaDoubleComplex *d_lA[], magma_int_t ldda,
magmaDoubleComplex *d_lP[], magma_int_t lddp,
magmaDoubleComplex *a, magma_int_t lda, magma_int_t h,
magma_queue_t stream[][3], magma_event_t event[][5],
magma_int_t *info )
{
/* -- MAGMA (version 1.4.0) --
Univ. of Tennessee, Knoxville
Univ. of California, Berkeley
Univ. of Colorado, Denver
August 2013
Purpose
=======
ZPOTRF computes the Cholesky factorization of a complex Hermitian
positive definite matrix dA.
Auxiliary subroutine for zpotrf2_ooc. It is multiple gpu interface to compute
Cholesky of a "rectangular" matrix.
The factorization has the form
dA = U**H * U, if UPLO = 'U', or
dA = L * L**H, if UPLO = 'L',
where U is an upper triangular matrix and L is lower triangular.
This is the block version of the algorithm, calling Level 3 BLAS.
Arguments
=========
UPLO (input) CHARACTER*1
= 'U': Upper triangle of dA is stored;
= 'L': Lower triangle of dA is stored.
N (input) INTEGER
The order of the matrix dA. N >= 0.
dA (input/output) COMPLEX_16 array on the GPU, dimension (LDDA,N)
On entry, the Hermitian matrix dA. If UPLO = 'U', the leading
N-by-N upper triangular part of dA contains the upper
triangular part of the matrix dA, and the strictly lower
triangular part of dA is not referenced. If UPLO = 'L', the
leading N-by-N lower triangular part of dA contains the lower
triangular part of the matrix dA, and the strictly upper
triangular part of dA is not referenced.
On exit, if INFO = 0, the factor U or L from the Cholesky
factorization dA = U**H * U or dA = L * L**H.
LDDA (input) INTEGER
The leading dimension of the array dA. LDDA >= max(1,N).
To benefit from coalescent memory accesses LDDA must be
dividable by 16.
INFO (output) INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value
> 0: if INFO = i, the leading minor of order i is not
positive definite, and the factorization could not be
completed.
===================================================================== */
magma_int_t j, jb, nb0, nb2, d, dd, id, j_local, j_local2, buf;
char uplo_[2] = {uplo, 0};
magmaDoubleComplex c_one = MAGMA_Z_ONE;
magmaDoubleComplex c_neg_one = MAGMA_Z_NEG_ONE;
double d_one = 1.0;
double d_neg_one = -1.0;
int upper = lapackf77_lsame(uplo_, "U");
magmaDoubleComplex *dlpanel;
magma_int_t n_local[MagmaMaxGPUs], ldpanel;
const magma_int_t stream1 = 0, stream2 = 1, stream3 = 2;
#if (defined(PRECISION_d) || defined(PRECISION_s)) && defined(ZTRSM_WORK)
/* used by ztrsm_work */
int trsm_nb = 128;
int trsm_n = trsm_nb*((nb+trsm_nb-1)/trsm_nb);
magmaDoubleComplex *d_dinvA[MagmaMaxGPUs];
magmaDoubleComplex *d_x[MagmaMaxGPUs];
#define dinvA(d,j) &(d_dinvA[(d)][(j)*trsm_nb*trsm_n])
#define dx(d,j) &(d_x[(d)][(j)*nb*m])
/*
* Allocate device memory for the inversed diagonal blocks, size=N*BLOCK_SIZE
*/
for( d=0; d<num_gpus; d++ ) {
magma_setdevice(d);
if ( (MAGMA_SUCCESS != magma_zmalloc( &d_dinvA[d], 2*trsm_nb*trsm_n )) ||
(MAGMA_SUCCESS != magma_zmalloc( &d_x[d], 2*nb*(upper ? n : m) )) ) {
*info = MAGMA_ERR_DEVICE_ALLOC;
return *info;
}
}
magma_setdevice(0);
#endif
*info = 0;
if ( (! upper) && (! lapackf77_lsame(uplo_, "L")) ) {
*info = -1;
} else if (n < 0) {
*info = -2;
} else if (!upper && num_gpus*ldda < max(1,n)) {
*info = -4;
} else if (upper && ldda < max(1,m)) {
*info = -4;
}
if (*info != 0) {
magma_xerbla( __func__, -(*info) );
return *info;
}
/* initialization */
for( d=0; d<num_gpus; d++ ) {
/* local-n and local-ld */
if (upper) {
n_local[d] = (n/(nb*num_gpus))*nb;
if (d < (n/nb)%num_gpus)
n_local[d] += nb;
else if (d == (n/nb)%num_gpus)
n_local[d] += n%nb;
} else {
n_local[d] = (m/(nb*num_gpus))*nb;
if (d < (m/nb)%num_gpus)
n_local[d] += nb;
else if (d == (m/nb)%num_gpus)
n_local[d] += m%nb;
}
}
/* == initialize the trace */
trace_init( 1, num_gpus, 3, (CUstream_st**)stream );
if (upper)
{
/* ---------------------------------------------- */
/* Upper-triangular case */
/* > Compute the Cholesky factorization A = U'*U. */
/* ---------------------------------------------- */
for (j=0; j<m; j+=nb) {
/* Set the GPU number that holds the current panel */
id = (j/nb)%num_gpus;
buf = (j/nb)%num_gpus; // right now, we have num_gpu buffers, so id and buf are the same..
/* Set the local index where the current panel is */
j_local = j/(nb*num_gpus);
jb = min(nb, (m-j));
/* Update the current diagonal block on stream1 */
magma_setdevice(id);
if( j > 0 ) {
magmablasSetKernelStream(stream[id][stream1]);
trace_gpu_start( id, stream1, "syrk", "syrk" );
magma_zherk(MagmaUpper, MagmaConjTrans, jb, j,
d_neg_one, dlA(id, 0, nb*j_local), ldda,
d_one, dlA(id, j, nb*j_local), ldda);
trace_gpu_end( id, stream1 );
}
/* send the diagonal to cpu on stream1 */
trace_gpu_start( id, stream1, "comm", "D to CPU" );
magma_zgetmatrix_async( jb, jb,
dlA(id, j, nb*j_local), ldda,
Aup(j,j), lda,
stream[id][stream1] );
trace_gpu_end( id, stream1 );
/* update off-diagonal blocks in the panel */
if( j > 0 ) {
d = (j/nb+1)%num_gpus;
for( dd=0; dd<num_gpus; dd++ ) {
j_local2 = j_local+1;
if( d > id ) j_local2 --;
nb0 = nb*j_local2; // number of local columns in the panel, while jb is panel-size (number of rows)
if( n_local[d] > nb0 ) {
magma_setdevice(d);
magmablasSetKernelStream(stream[d][stream2]);
if( d == id ) {
dlpanel = dlA(d,0,nb*j_local);
ldpanel = ldda;
// the GPU owns the row from start, and no need of synch.
//magma_queue_wait_event( stream[d][stream2], event[d][0] ); // rows arrived at gpu
} else {
dlpanel = dlP(d,nb,0,buf);
ldpanel = lddp;
magma_queue_wait_event( stream[d][stream2], event[d][0] ); // rows arrived at gpu
}
trace_gpu_start( d, stream2, "gemm", "gemm" );
magma_zgemm(MagmaConjTrans, MagmaNoTrans,
jb, n_local[d]-nb0, j,
c_neg_one, dlpanel, ldpanel,
dlA(d, 0, nb0), ldda,
c_one, dlA(d, j, nb0), ldda);
trace_gpu_end( d, stream2 );
magma_event_record( event[d][2], stream[d][stream2] );
}
d = (d+1)%num_gpus;
}
}
/* wait for panel and factorize it on cpu */
magma_setdevice(id);
magma_queue_sync( stream[id][stream1] );
trace_cpu_start( 0, "getrf", "getrf" );
lapackf77_zpotrf(MagmaUpperStr, &jb, Aup(j,j), &lda, info);
trace_cpu_end( 0 );
if (*info != 0) {
*info = *info + j;
break;
}
/* send the diagonal to gpus on stream1 */
if ( (j+jb) < n) {
d = (j/nb+1)%num_gpus;
for( dd=0; dd<num_gpus; dd++ ) {
if( d == id ) {
dlpanel = dlA(d, j, nb*j_local);
ldpanel = ldda;
} else {
dlpanel = dlP(d,0,0,buf);
ldpanel = lddp;
}
magma_setdevice(d);
trace_gpu_start( d, stream1, "comm", "comm" );
magma_zsetmatrix_async( jb, jb,
Aup(j,j), lda,
dlpanel, ldpanel,
stream[d][stream1] );
trace_gpu_end( d, stream1 );
magma_event_record( event[d][1], stream[d][stream1] );
d = (d+1)%num_gpus;
}
} else {
magma_setdevice(id);
trace_gpu_start( id, stream1, "comm", "comm" );
magma_zsetmatrix_async( jb, jb,
Aup(j,j), lda,
dlA(id, j, nb*j_local), ldda,
stream[id][stream1] );
trace_gpu_end( id, stream1 );
}
/* panel-factorize the off-diagonal */
if ( (j+jb) < n) {
d = (j/nb+1)%num_gpus;
for( dd=0; dd<num_gpus; dd++ ) {
/* next column */
j_local2 = j_local+1;
if( d > id ) j_local2--;
if( d == id ) {
dlpanel = dlA(d,j,nb*j_local);
ldpanel = ldda;
} else {
dlpanel = dlP(d,0,0,buf);
ldpanel = lddp;
}
nb2 = n_local[d] - j_local2*nb;
magma_setdevice(d);
if( j+jb < m && d == (j/nb+1)%num_gpus ) {
/* owns the next column, look-ahead next block on stream1 */
nb0 = min(nb, nb2);
magmablasSetKernelStream(stream[d][stream1]);
magma_queue_wait_event( stream[d][stream1], event[d][2] ); // wait for gemm update
trace_gpu_start( d, stream1, "trsm", "trsm" );
#if (defined(PRECISION_d) || defined(PRECISION_s)) && defined(ZTRSM_WORK)
magmablas_zlaset( MagmaUpperLower, trsm_nb, trsm_n, dinvA(d,0),trsm_nb );
magmablas_zlaset( MagmaUpperLower, nb0,jb, dx(d,0),nb0 );
magmablas_ztrsm_work( MagmaLeft, MagmaUpper,
MagmaConjTrans, MagmaNonUnit,
jb, nb0, c_one,
dlpanel, ldpanel,
dlA(d, j, nb*j_local2), ldda,
1, dinvA(d,0), dx(d,0) );
#else
magma_ztrsm( MagmaLeft, MagmaUpper,
MagmaConjTrans, MagmaNonUnit,
jb, nb0, c_one,
dlpanel, ldpanel,
dlA(d, j, nb*j_local2), ldda);
#endif
magma_event_record( event[d][4], stream[d][stream1] );
trace_gpu_end( d, stream1 );
} else if( nb2 > 0 ) {
/* update all the blocks on stream2 */
magma_queue_wait_event( stream[d][stream2], event[d][1] ); // wait for cholesky factor
trace_gpu_start( d, stream2, "trsm", "trsm" );
magmablasSetKernelStream(stream[d][stream2]);
#if (defined(PRECISION_d) || defined(PRECISION_s)) && defined(ZTRSM_WORK)
magmablas_zlaset( MagmaUpperLower, trsm_nb,trsm_n, dinvA(d,0),trsm_nb );
magmablas_zlaset( MagmaUpperLower, nb2,jb, dx(d,0),nb2 );
magmablas_ztrsm_work( MagmaLeft, MagmaUpper,
MagmaConjTrans, MagmaNonUnit,
jb, nb2, c_one,
dlpanel, ldpanel,
dlA(d, j, nb*j_local2), ldda,
1, dinvA(d,0), dx(d,0) );
#else
magma_ztrsm( MagmaLeft, MagmaUpper,
MagmaConjTrans, MagmaNonUnit,
jb, nb2, c_one,
dlpanel, ldpanel,
dlA(d, j, nb*j_local2), ldda);
#endif
trace_gpu_end( d, stream2 );
}
d = (d+1)%num_gpus;
} /* end of for */
/* ========================================================== */
if( j+jb < m ) {
d = (j/nb+1)%num_gpus;
/* next column */
j_local2 = j_local+1;
if( d > id ) j_local2--;
nb0 = min(nb, n_local[d]-nb*j_local2 );
/* even on 1 gpu, off-diagonals are copied to cpu (synchronize at the end). *
* so we have the Cholesky factor, but only diagonal submatrix of the big panel, *
* on cpu at the end. */
int d2, buf2;
magma_setdevice(d);
/* lookahead done */
magma_queue_wait_event( stream[d][stream3], event[d][4] );
trace_gpu_start( d, stream3, "comm", "row to CPU" );
magma_zgetmatrix_async( (j+jb), nb0,
dlA(d, 0, nb*j_local2), ldda,
Aup(0,j+jb), lda,
stream[d][stream3] );
trace_gpu_end( d, stream3 );
magma_event_record( event[d][3], stream[d][stream3] );
/* needed on pluto */
//magma_queue_sync( stream[d][stream3] );
/* broadcast rows to gpus on stream2 */
buf2 = ((j+jb)/nb)%num_gpus;
for( d2=0; d2<num_gpus; d2++ ) {
if( d2 != d )
{
magma_setdevice(d2);
trace_gpu_start( d2, stream3, "comm", "row to GPUs" );
magma_queue_wait_event( stream[d2][stream3], event[d][3] ); // rows arrived at cpu on stream3
magma_zsetmatrix_async( j+jb, nb0,
Aup(0,j+jb), lda,
dlP(d2,nb,0,buf2), lddp,
stream[d2][stream3] );
trace_gpu_end( d2, stream3 );
magma_event_record( event[d2][0], stream[d2][stream3] );
}
}
/* =========================== */
/* update the remaining blocks */
nb2 = n_local[d]-(nb*j_local2 + nb0);
if( nb2 > 0 ) {
if( d == id ) {
dlpanel = dlA(d, j, nb*j_local);
ldpanel = ldda;
} else {
dlpanel = dlP(d,0,0,buf);
ldpanel = lddp;
}
magma_setdevice(d);
magmablasSetKernelStream(stream[d][stream2]);
trace_gpu_start( d, stream2, "trsm", "trsm" );
#if (defined(PRECISION_d) || defined(PRECISION_s)) && defined(ZTRSM_WORK)
int flag = 0;
if (flag == 0) {
magma_queue_wait_event( stream[d][stream2], event[d][4] ); // lookahead -> diagonal inversion
} else {
magmablas_zlaset( MagmaUpperLower, trsm_nb,trsm_n, dinvA(d,flag),trsm_nb );
magma_queue_wait_event( stream[d][stream2], event[d][1] ); // panel received
}
magmablas_zlaset( MagmaUpperLower, nb2,jb, dx(d,1),nb2 );
magmablas_ztrsm_work( MagmaLeft, MagmaUpper, MagmaConjTrans, MagmaNonUnit,
jb, nb2, c_one,
dlpanel, ldpanel,
dlA(d, j, nb*j_local2+nb0), ldda,
flag, dinvA(d,flag), dx(d,1) );
#else
magma_queue_wait_event( stream[d][stream2], event[d][1] ); // wait for cholesky factor
magma_ztrsm( MagmaLeft, MagmaUpper, MagmaConjTrans, MagmaNonUnit,
jb, nb2, c_one,
dlpanel, ldpanel,
dlA(d, j, nb*j_local2+nb0), ldda);
#endif
trace_gpu_end( d, stream2 );
}
}
} /* end of ztrsm */
} /* end of for j=1, .., n */
} else {
/* ---------------------------------------------- */
/* Lower-triangular case */
/* > Compute the Cholesky factorization A = L*L'. */
/* ---------------------------------------------- */
for (j=0; j<n; j+=nb) {
/* Set the GPU number that holds the current panel */
id = (j/nb)%num_gpus;
buf = (j/nb)%num_gpus;
/* Set the local index where the current panel is */
j_local = j/(nb*num_gpus);
jb = min(nb, (n-j));
/* Update the current diagonal block on stream1 */
magma_setdevice(id);
if( j > 0 ) {
magmablasSetKernelStream(stream[id][stream1]);
magma_zherk(MagmaLower, MagmaNoTrans, jb, j,
d_neg_one, dlA(id, nb*j_local, 0), ldda,
d_one, dlA(id, nb*j_local, j), ldda);
}
/* send the diagonal to cpu on stream1 */
magma_zgetmatrix_async( jb, jb,
dlA(id, nb*j_local, j), ldda,
Alo(j,j), lda,
stream[id][stream1] );
/* update off-diagonal blocks of the panel */
if( j > 0 ) {
d = (j/nb+1)%num_gpus;
for( dd=0; dd<num_gpus; dd++ ) {
j_local2 = j_local+1;
if( d > id ) j_local2 --;
nb0 = nb*j_local2;
if( nb0 < n_local[d] ) {
magma_setdevice(d);
magmablasSetKernelStream(stream[d][stream2]);
if( d == id ) {
dlpanel = dlA(d, nb*j_local, 0);
ldpanel = ldda;
} else {
dlpanel = dlPT(d,0,nb,buf);
ldpanel = nb;
magma_queue_wait_event( stream[d][stream2], event[d][0] ); // rows arrived at gpu
}
magma_zgemm( MagmaNoTrans, MagmaConjTrans,
n_local[d]-nb0, jb, j,
c_neg_one, dlA(d, nb0, 0), ldda,
dlpanel, ldpanel,
c_one, dlA(d, nb0, j), ldda);
magma_event_record( event[d][2], stream[d][stream2] );
}
d = (d+1)%num_gpus;
}
}
/* wait for the panel and factorized it on cpu */
magma_setdevice(id);
magma_queue_sync( stream[id][stream1] );
lapackf77_zpotrf(MagmaLowerStr, &jb, Alo(j,j), &lda, info);
if (*info != 0) {
*info = *info + j;
break;
}
/* send the diagonal to gpus on stream1 */
if ( (j+jb) < m) {
d = (j/nb+1)%num_gpus;
for( dd=0; dd<num_gpus; dd++ ) {
if( d == id ) {
dlpanel = dlA(d, nb*j_local, j);
ldpanel = ldda;
} else {
dlpanel = dlPT(d, 0, 0, buf);
ldpanel = nb;
}
magma_setdevice(d);
magma_zsetmatrix_async( jb, jb,
Alo(j,j), lda,
dlpanel, ldpanel,
stream[d][stream1] );
magma_event_record( event[d][1], stream[d][stream1] );
d = (d+1)%num_gpus;
}
} else {
magma_setdevice(id);
magma_zsetmatrix_async( jb, jb,
Alo(j,j), lda,
dlA(id, nb*j_local, j), ldda,
stream[id][stream1] );
}
/* panel factorize the off-diagonal */
if ( (j+jb) < m) {
d = (j/nb+1)%num_gpus;
for( dd=0; dd<num_gpus; dd++ ) {
/* next column */
j_local2 = j_local+1;
if( d > id ) j_local2--;
if( d == id ) {
dlpanel = dlA(d, nb*j_local, j);
ldpanel = ldda;
} else {
dlpanel = dlPT(d, 0, 0, buf);
ldpanel = nb;
}
nb2 = n_local[d] - j_local2*nb;
nb0 = min(nb, nb2);
magma_setdevice(d);
if( j+nb < n && d == (j/nb+1)%num_gpus ) { /* owns next column, look-ahead next block on stream1 */
if ( j > 0 ) magma_queue_wait_event( stream[d][stream1], event[d][2] ); // wait for gemm update
magmablasSetKernelStream(stream[d][stream1]);
#if (defined(PRECISION_d) || defined(PRECISION_s)) && defined(ZTRSM_WORK)
magmablas_zlaset( MagmaUpperLower, trsm_nb, trsm_n, dinvA(d,0),trsm_nb );
magmablas_zlaset( MagmaUpperLower, nb0,jb, dx(d,0),nb0 );
magmablas_ztrsm_work( MagmaRight, MagmaLower,
MagmaConjTrans, MagmaNonUnit,
nb0, jb, c_one,
dlpanel, ldpanel,
dlA(d, nb*j_local2, j), ldda,
1, dinvA(d,0), dx(d,0) );
#else
magma_ztrsm( MagmaRight, MagmaLower,
MagmaConjTrans, MagmaNonUnit,
nb0, jb, c_one,
dlpanel, ldpanel,
dlA(d, nb*j_local2, j), ldda);
#endif
magma_event_record( event[d][4], stream[d][stream1] );
} else if( nb2 > 0 ) { /* other gpus updating all the blocks on stream2 */
/* update the entire column */
magma_queue_wait_event( stream[d][stream2], event[d][1] ); // wait for the cholesky factor
magmablasSetKernelStream(stream[d][stream2]);
#if (defined(PRECISION_d) || defined(PRECISION_s)) && defined(ZTRSM_WORK)
magmablas_zlaset( MagmaUpperLower, trsm_nb,trsm_n, dinvA(d,0),trsm_nb );
magmablas_zlaset( MagmaUpperLower, nb2,jb, dx(d,0),nb2 );
magmablas_ztrsm_work( MagmaRight, MagmaLower, MagmaConjTrans, MagmaNonUnit,
nb2, jb, c_one,
dlpanel, ldpanel,
dlA(d, nb*j_local2, j), ldda,
1, dinvA(d,0), dx(d,0) );
#else
magma_ztrsm( MagmaRight, MagmaLower, MagmaConjTrans, MagmaNonUnit,
nb2, jb, c_one,
dlpanel, ldpanel,
dlA(d, nb*j_local2, j), ldda);
#endif
}
d = (d+1)%num_gpus;
} /* end for d */
/* ========================================================== */
if( j+jb < n ) {
d = (j/nb+1)%num_gpus;
/* next column */
j_local2 = j_local+1;
if( d > id ) j_local2--;
nb0 = min(nb, n_local[d]-nb*j_local2 );
/* even on 1 gpu, we copy off-diagonal to cpu (but don't synchronize). */
/* so we have the Cholesky factor on cpu at the end. */
int d2, buf2;
//#define ZPOTRF_DEVICE_TO_DEVICE
#ifdef ZPOTRF_DEVICE_TO_DEVICE
// lookahead done
/* broadcast the rows to gpus */
buf2 = ((j+jb)/nb)%num_gpus;
for( d2=0; d2<num_gpus; d2++ ) {
magma_setdevice(d2);
magma_queue_wait_event( stream[d2][stream3], event[d][4] );
if( d2 != d ) {
magma_zcopymatrix_async( nb0, j+jb,
dlPT(d2,0,nb,buf2), nb, // first nbxnb reserved for diagonal block
dlA(d, nb*j_local2, 0), ldda,
stream[d2][stream3] );
magma_event_record( event[d2][0], stream[d2][stream3] );
} else {
magma_zgetmatrix_async( nb0, j+jb,
dlA(d, nb*j_local2, 0), ldda,
Alo(j+jb,0), lda,
stream[d][stream3] );
}
}
#else
// lookahead done
magma_setdevice(d);
magma_queue_wait_event( stream[d][stream3], event[d][4] );
magma_zgetmatrix_async( nb0, j+jb,
dlA(d, nb*j_local2, 0), ldda,
Alo(j+jb,0), lda,
stream[d][stream3] );
magma_event_record( event[d][3], stream[d][stream3] );
/* syn on rows on CPU, seem to be needed on Pluto */
//magma_queue_sync( stream[d][stream3] );
/* broadcast the rows to gpus */
buf2 = ((j+jb)/nb)%num_gpus;
for( d2=0; d2<num_gpus; d2++ ) {
if( d2 != d )
{
magma_setdevice(d2);
magma_queue_wait_event( stream[d2][stream3], event[d][3] ); // getmatrix done
magma_zsetmatrix_async( nb0, j+jb,
Alo(j+jb,0), lda,
dlPT(d2,0,nb,buf2), nb, // first nbxnb reserved for diagonal block
stream[d2][stream3] );
magma_event_record( event[d2][0], stream[d2][stream3] );
}
}
#endif
/* =================================== */
/* updates remaining blocks on stream2 */
nb2 = n_local[d] - (j_local2*nb + nb0);
if( nb2 > 0 ) {
if( d == id ) {
dlpanel = dlA(d, nb*j_local, j);
ldpanel = ldda;
} else {
dlpanel = dlPT(d,0,0,buf);
ldpanel = nb;
}
magma_setdevice(d);
magmablasSetKernelStream(stream[d][stream2]);
/* update the remaining blocks in the column */
#if (defined(PRECISION_d) || defined(PRECISION_s)) && defined(ZTRSM_WORK)
int flag = 0;
if (flag == 0) {
magma_queue_wait_event( stream[d][stream2], event[d][4] ); // lookahead -> diagonal inversion
} else {
magmablas_zlaset( MagmaUpperLower, trsm_nb,trsm_n, dinvA(d,flag),trsm_nb );
magma_queue_wait_event( stream[d][stream2], event[d][1] ); // panel received
}
magmablas_zlaset( MagmaUpperLower, nb2,jb, dx(d,1),nb2 );
magmablas_ztrsm_work( MagmaRight, MagmaLower, MagmaConjTrans, MagmaNonUnit,
nb2, jb, c_one,
dlpanel, ldpanel,
dlA(d, nb*j_local2+nb0, j), ldda,
flag, dinvA(d,flag), dx(d,1) );
#else
magma_queue_wait_event( stream[d][stream2], event[d][1] ); // panel received
magma_ztrsm( MagmaRight, MagmaLower, MagmaConjTrans, MagmaNonUnit,
nb2, jb, c_one,
dlpanel, ldpanel,
dlA(d, nb*j_local2+nb0, j), ldda);
#endif
}
}
}
}
} /* end of else not upper */
/* == finalize the trace == */
trace_finalize( "zpotrf.svg","trace.css" );
for( d=0; d<num_gpus; d++ ) {
magma_setdevice(d);
for( j=0; j<3; j++ ) {
magma_queue_sync( stream[d][j] );
}
#if (defined(PRECISION_d) || defined(PRECISION_s)) && defined(ZTRSM_WORK)
magma_free( d_dinvA[d] );
magma_free( d_x[d] );
#endif
magmablasSetKernelStream(NULL);
}
magma_setdevice(0);
return *info;
} /* magma_zpotrf_mgpu */
/* ////////////////////////////////////////////////////////////////////////////
-- Testing zpotf2_gpu
*/
int main( int argc, char** argv)
{
TESTING_INIT();
real_Double_t gflops, gpu_perf, gpu_time, cpu_perf, cpu_time;
magmaDoubleComplex *h_A, *h_R;
magmaDoubleComplex_ptr d_A;
magma_int_t N, n2, lda, ldda, info;
magmaDoubleComplex c_neg_one = MAGMA_Z_NEG_ONE;
magma_int_t ione = 1;
magma_int_t ISEED[4] = {0,0,0,1};
double Anorm, error, work[1];
magma_int_t status = 0;
magma_opts opts;
opts.parse_opts( argc, argv );
double tol = opts.tolerance * lapackf77_dlamch("E");
opts.lapack |= opts.check; // check (-c) implies lapack (-l)
printf("%% uplo = %s\n", lapack_uplo_const(opts.uplo) );
printf("%% N CPU Gflop/s (ms) GPU Gflop/s (ms) ||R_magma - R_lapack||_F / ||R_lapack||_F\n");
printf("%%=======================================================\n");
for( int itest = 0; itest < opts.ntest; ++itest ) {
for( int iter = 0; iter < opts.niter; ++iter ) {
N = opts.nsize[itest];
lda = N;
n2 = lda*N;
ldda = magma_roundup( N, opts.align ); // multiple of 32 by default
gflops = FLOPS_ZPOTRF( N ) / 1e9;
if ( N > 512 ) {
printf( "%5d skipping because zpotf2 does not support N > 512\n", (int) N );
continue;
}
TESTING_MALLOC_CPU( h_A, magmaDoubleComplex, n2 );
TESTING_MALLOC_PIN( h_R, magmaDoubleComplex, n2 );
TESTING_MALLOC_DEV( d_A, magmaDoubleComplex, ldda*N );
/* Initialize the matrix */
lapackf77_zlarnv( &ione, ISEED, &n2, h_A );
magma_zmake_hpd( N, h_A, lda );
lapackf77_zlacpy( MagmaFullStr, &N, &N, h_A, &lda, h_R, &lda );
magma_zsetmatrix( N, N, h_A, lda, d_A, ldda );
/* ====================================================================
Performs operation using MAGMA
=================================================================== */
gpu_time = magma_sync_wtime( opts.queue );
magma_zpotf2_gpu( opts.uplo, N, d_A, ldda, opts.queue, &info );
gpu_time = magma_sync_wtime( opts.queue ) - gpu_time;
gpu_perf = gflops / gpu_time;
if (info != 0) {
printf("magma_zpotf2_gpu returned error %d: %s.\n",
(int) info, magma_strerror( info ));
}
if ( opts.lapack ) {
/* =====================================================================
Performs operation using LAPACK
=================================================================== */
cpu_time = magma_wtime();
lapackf77_zpotrf( lapack_uplo_const(opts.uplo), &N, h_A, &lda, &info );
cpu_time = magma_wtime() - cpu_time;
cpu_perf = gflops / cpu_time;
if (info != 0) {
printf("lapackf77_zpotrf returned error %d: %s.\n",
(int) info, magma_strerror( info ));
}
/* =====================================================================
Check the result compared to LAPACK
=================================================================== */
magma_zgetmatrix( N, N, d_A, ldda, h_R, lda );
blasf77_zaxpy(&n2, &c_neg_one, h_A, &ione, h_R, &ione);
Anorm = lapackf77_zlange("f", &N, &N, h_A, &lda, work);
error = lapackf77_zlange("f", &N, &N, h_R, &lda, work) / Anorm;
printf("%5d %7.2f (%7.2f) %7.2f (%7.2f) %8.2e %s\n",
(int) N, cpu_perf, cpu_time*1000., gpu_perf, gpu_time*1000.,
error, (error < tol ? "ok" : "failed"));
status += ! (error < tol);
}
else {
printf("%5d --- ( --- ) %7.2f (%7.2f) --- \n",
(int) N, gpu_perf, gpu_time*1000. );
}
TESTING_FREE_CPU( h_A );
TESTING_FREE_PIN( h_R );
TESTING_FREE_DEV( d_A );
fflush( stdout );
}
if ( opts.niter > 1 ) {
printf( "\n" );
}
}
opts.cleanup();
TESTING_FINALIZE();
return status;
}
/* ////////////////////////////////////////////////////////////////////////////
-- Testing zpotrf
*/
int main( int argc, char** argv)
{
TESTING_INIT();
real_Double_t gflops, gpu_perf, gpu_time, cpu_perf, cpu_time;
magmaDoubleComplex *h_A, *h_R;
magma_int_t N, n2, lda, info;
magmaDoubleComplex c_neg_one = MAGMA_Z_NEG_ONE;
magma_int_t ione = 1;
magma_int_t ISEED[4] = {0,0,0,1};
double work[1], error;
magma_int_t status = 0;
magma_opts opts;
parse_opts( argc, argv, &opts );
opts.lapack |= opts.check; // check (-c) implies lapack (-l)
double tol = opts.tolerance * lapackf77_dlamch("E");
printf("ngpu %d, uplo %c\n", (int) opts.ngpu, opts.uplo );
printf(" N CPU GFlop/s (sec) GPU GFlop/s (sec) ||R_magma - R_lapack||_F / ||R_lapack||_F\n");
printf("========================================================\n");
for( int i = 0; i < opts.ntest; ++i ) {
for( int iter = 0; iter < opts.niter; ++iter ) {
N = opts.nsize[i];
lda = N;
n2 = lda*N;
gflops = FLOPS_ZPOTRF( N ) / 1e9;
TESTING_MALLOC( h_A, magmaDoubleComplex, n2 );
TESTING_HOSTALLOC( h_R, magmaDoubleComplex, n2 );
/* Initialize the matrix */
lapackf77_zlarnv( &ione, ISEED, &n2, h_A );
magma_zmake_hpd( N, h_A, lda );
lapackf77_zlacpy( MagmaUpperLowerStr, &N, &N, h_A, &lda, h_R, &lda );
/* ====================================================================
Performs operation using MAGMA
=================================================================== */
gpu_time = magma_wtime();
magma_zpotrf( opts.uplo, N, h_R, lda, &info );
gpu_time = magma_wtime() - gpu_time;
gpu_perf = gflops / gpu_time;
if (info != 0)
printf("magma_zpotrf returned error %d: %s.\n",
(int) info, magma_strerror( info ));
if ( opts.lapack ) {
/* =====================================================================
Performs operation using LAPACK
=================================================================== */
cpu_time = magma_wtime();
lapackf77_zpotrf( &opts.uplo, &N, h_A, &lda, &info );
cpu_time = magma_wtime() - cpu_time;
cpu_perf = gflops / cpu_time;
if (info != 0)
printf("lapackf77_zpotrf returned error %d: %s.\n",
(int) info, magma_strerror( info ));
/* =====================================================================
Check the result compared to LAPACK
=================================================================== */
error = lapackf77_zlange("f", &N, &N, h_A, &lda, work);
blasf77_zaxpy(&n2, &c_neg_one, h_A, &ione, h_R, &ione);
error = lapackf77_zlange("f", &N, &N, h_R, &lda, work) / error;
printf("%5d %7.2f (%7.2f) %7.2f (%7.2f) %8.2e%s\n",
(int) N, cpu_perf, cpu_time, gpu_perf, gpu_time,
error, (error < tol ? "" : " failed") );
status |= ! (error < tol);
}
else {
printf("%5d --- ( --- ) %7.2f (%7.2f) --- \n",
(int) N, gpu_perf, gpu_time );
}
TESTING_FREE( h_A );
TESTING_HOSTFREE( h_R );
}
}
TESTING_FINALIZE();
return status;
}
/* ////////////////////////////////////////////////////////////////////////////
-- Testing zpotri
*/
int main( int argc, char** argv)
{
TESTING_CUDA_INIT();
magma_timestr_t start, end;
double flops, gpu_perf, cpu_perf;
cuDoubleComplex *h_A, *h_R;
magma_int_t N=0, n2, lda;
magma_int_t size[10] = {1024,2048,3072,4032,5184,6016,7040,8064,9088,10112};
magma_int_t i, info;
const char *uplo = MagmaLowerStr;
cuDoubleComplex c_neg_one = MAGMA_Z_NEG_ONE;
magma_int_t ione = 1;
magma_int_t ISEED[4] = {0,0,0,1};
double work[1], matnorm;
if (argc != 1){
for(i = 1; i<argc; i++){
if (strcmp("-N", argv[i])==0)
N = atoi(argv[++i]);
}
if (N>0) size[0] = size[9] = N;
else exit(1);
}
else {
printf("\nUsage: \n");
printf(" testing_zpotri -N %d\n\n", 1024);
}
/* Allocate host memory for the matrix */
n2 = size[9] * size[9];
TESTING_MALLOC( h_A, cuDoubleComplex, n2);
TESTING_HOSTALLOC( h_R, cuDoubleComplex, n2);
printf(" N CPU GFlop/s GPU GFlop/s ||R||_F / ||A||_F\n");
printf("========================================================\n");
for(i=0; i<10; i++){
N = size[i];
lda = N;
n2 = lda*N;
flops = FLOPS_ZPOTRI( (double)N ) / 1000000;
/* ====================================================================
Initialize the matrix
=================================================================== */
lapackf77_zlarnv( &ione, ISEED, &n2, h_A );
/* Symmetrize and increase the diagonal */
{
magma_int_t i, j;
for(i=0; i<N; i++) {
MAGMA_Z_SET2REAL( h_A[i*lda+i], ( MAGMA_Z_REAL(h_A[i*lda+i]) + 1.*N ) );
for(j=0; j<i; j++)
h_A[i*lda+j] = cuConj(h_A[j*lda+i]);
}
}
lapackf77_zlacpy( MagmaUpperLowerStr, &N, &N, h_A, &lda, h_R, &lda );
/* ====================================================================
Performs operation using MAGMA
=================================================================== */
/* warm-up */
magma_zpotrf(uplo[0], N, h_R, lda, &info);
magma_zpotri(uplo[0], N, h_R, lda, &info);
lapackf77_zlacpy( MagmaUpperLowerStr, &N, &N, h_A, &lda, h_R, &lda );
/* factorize matrix */
magma_zpotrf(uplo[0], N, h_R, lda, &info);
// check for exact singularity
//h_R[ 10 + 10*lda ] = MAGMA_Z_MAKE( 0.0, 0.0 );
start = get_current_time();
magma_zpotri(uplo[0], N, h_R, lda, &info);
end = get_current_time();
if (info != 0)
printf("magma_zpotri returned error %d\n", (int) info);
gpu_perf = flops / GetTimerValue(start, end);
/* =====================================================================
Performs operation using LAPACK
=================================================================== */
lapackf77_zpotrf(uplo, &N, h_A, &lda, &info);
start = get_current_time();
lapackf77_zpotri(uplo, &N, h_A, &lda, &info);
end = get_current_time();
if (info != 0)
printf("lapackf77_zpotri returned error %d\n", (int) info);
cpu_perf = flops / GetTimerValue(start, end);
/* =====================================================================
Check the result compared to LAPACK
=================================================================== */
matnorm = lapackf77_zlange("f", &N, &N, h_A, &N, work);
blasf77_zaxpy(&n2, &c_neg_one, h_A, &ione, h_R, &ione);
printf("%5d %6.2f %6.2f %e\n",
(int) size[i], cpu_perf, gpu_perf,
lapackf77_zlange("f", &N, &N, h_R, &N, work) / matnorm );
if (argc != 1)
break;
}
/* Memory clean up */
TESTING_FREE( h_A );
TESTING_HOSTFREE( h_R );
TESTING_CUDA_FINALIZE();
}
