extern "C" magma_int_t
magma_cbulge_applyQ_v2_m(magma_int_t ngpu, magma_side_t side,
magma_int_t NE, magma_int_t N,
magma_int_t NB, magma_int_t Vblksiz,
magmaFloatComplex *E, magma_int_t lde,
magmaFloatComplex *V, magma_int_t ldv,
magmaFloatComplex *T, magma_int_t ldt,
magma_int_t *info)
{
//%===========================
//% local variables
//%===========================
magma_int_t Vm, Vn, mt, nt;
magma_int_t myrow, mycol, blkj, blki;
magma_int_t blkid,vpos,tpos;
magma_int_t firstrow, nbcolinvolvd;
magma_int_t versionL = 113;
magma_int_t versionR = 92;
magma_int_t Vchunksiz = 10;
*info=0;
/* Quick return */
if ( NE == 0 ) {
return *info;
}
if ( N == 0 ) {
return *info;
}
if ( NB == 0 ) {
return *info;
}
/* ==========================================
* some infos for developer
* Initialisation and checking nb of cores
* ==========================================*/
/* we have 2 algo for left (113 114) and 2 algo for right (91 92)
* which correspond to versionL versionR.
* They are very similar (detail explained in tech report and matlab code)
* however version 114 and 92 improve locality.
* while version 113 is used in case WNATZ=1 (construct Q2) which allow
* the construction to be done in an optimized way taking into
* consideration that the matrix is Identity so making less flops.
*
*/
// Initialize streaming and events
magma_device_sync();
magma_device_t orig_dev;
magma_getdevice( &orig_dev );
magma_queue_t orig_stream;
magmablasGetKernelStream( &orig_stream );
magma_int_t nbevents =2, nstream=2;
magma_queue_t streams[MagmaMaxGPUs][20];
magma_event_t myevent[MagmaMaxGPUs][20];
for( magma_int_t dev = 0; dev < ngpu; ++dev ) {
magma_setdevice( dev );
for( magma_int_t i = 0; i < nstream; ++i ) {
magma_queue_create( &streams[dev][i] );
}
for( magma_int_t i = 0; i < nbevents; ++i ) {
cudaEventCreateWithFlags(&myevent[dev][i],cudaEventDisableTiming);
}
}
// Azzam 21/11/2012
// NOTE THAT dwork was of size 2*NE*Vblksiz+...
// but I am thinking why not modifing it to NE*Vblksiz+...
// BUT NO because the 2* is used because of making 2 streams working and so
// they might be using dwork in parallel
magmaFloatComplex *dE[MagmaMaxGPUs];
magmaFloatComplex *dwork[MagmaMaxGPUs], *dwork0[MagmaMaxGPUs], *dwork1[MagmaMaxGPUs];
//magmaFloatComplex *dwvt[MagmaMaxGPUs];
magmaFloatComplex *dwvt0[MagmaMaxGPUs], *dwvt1[MagmaMaxGPUs];
magmaFloatComplex *dT0[MagmaMaxGPUs], *dV0[MagmaMaxGPUs], *dT1[MagmaMaxGPUs], *dV1[MagmaMaxGPUs];
magma_int_t dev;
magma_int_t ldde = N;
magma_int_t lddv = ldv;
magma_int_t lddt = ldt;
magma_int_t ne_loc = magma_ceildiv(NE, ngpu);
if (ne_loc < 256)
ne_loc=256;
magma_int_t dwVTsiz = lddv*Vblksiz; // lddv*lddv + lddv*NE; // lddv*Vblksiz;
magma_int_t dworksiz = ne_loc*Vblksiz; // lddv*Vblksiz; // NE*Vblksiz;
ngpu = min(ngpu, magma_ceildiv(NE,ne_loc)); // Don't use GPU that will not have data.
// copy dE to GPUs
for (dev=0; dev < ngpu; ++dev) {
magma_setdevice( dev );
if (MAGMA_SUCCESS != magma_cmalloc( &dE[dev], ldde * ne_loc)) {
printf ("!!!! magma_cbulge_applyQ magma_alloc failed for: dE\n" );
exit(-1);
}
if (MAGMA_SUCCESS != magma_cmalloc( &dwork[dev], 2*dworksiz + 2*dwVTsiz + 2*Vchunksiz* (Vblksiz* (lddv+lddt)) )) {
printf ("!!!! magma_cbulge_applyQ magma_alloc failed for: dwork\n" );
exit(-1);
}
dwork0[dev] = dwork[dev]; // size = dworksiz;
dwork1[dev] = dwork0[dev] + dworksiz; // size = dworksiz;
dwvt0[dev] = dwork[dev] + 2*dworksiz; // size = dwVTsiz;
dwvt1[dev] = dwvt0[dev] + dwVTsiz; // size = dwVTsiz;
dV0[dev] = dwork[dev] + 2*dworksiz + 2*dwVTsiz;
dT0[dev] = dV0[dev] + Vchunksiz*Vblksiz*lddv;
dV1[dev] = dT0[dev] + Vchunksiz*Vblksiz*lddt;
dT1[dev] = dV1[dev] + Vchunksiz*Vblksiz*lddv;
magma_int_t ie_loc = min(ne_loc, NE - ne_loc*dev);
magma_csetmatrix_async( N, ie_loc, E+lde*ne_loc*dev, lde, dE(dev, 0, 0), ldde, streams[dev][1] );
}
// make overlapped copy
magma_int_t ncpy = 0;
magma_int_t copyed=0, copyst=0;
magma_int_t blkcnt,nothing, mysiz, flip, vld,tld, locpos;
findVTsiz(N, NB, Vblksiz, &blkcnt, ¬hing);
flip = 0;
/* SIDE LEFT meaning apply E = Q*E = (q_1*q_2*.....*q_n) * E ==> so traverse Vs in reverse order (forward) from q_n to q_1
* Also E is splitten by row meaning each apply consist in a block of row (horizontal block) */
/* SIDE RIGHT meaning apply E = E*Q = E * (q_1*q_2*.....*q_n) ==> so tarverse Vs in normal order (forward) from q_1 to q_n
* Also E is splitten by col meaning each apply consist in a block of col (vertical block) */
#ifdef ENABLE_DEBUG
printf(" APPLY Q_v22_m GPU with NGPU %d N %d, NE %d, NB %d, Vblksiz %d, versionL %d versionR %d SIDE %c \n",
ngpu, N, NE, NB, Vblksiz, versionL, versionR, side);
#endif
/*
* MagmamaLeft
*/
if (side == MagmaLeft) {
/*
* Version 113:
* loop over the block_col (nt) and for each find the
* number of tiles (mt) in this block_col. then loop over mt, find
* the size of the V's(Vm,Vn) and apply it to the corresponding
* portion of E.
*/
if ( versionL == 113 ) {
nt = magma_ceildiv((N-1),Vblksiz);
for (blkj=nt-1; blkj >= 0; blkj--) {
/* the index of the first row on the top of block (blkj) */
firstrow = blkj * Vblksiz + 1;
/*find the number of tile for this block */
if ( blkj == nt-1 )
mt = magma_ceildiv( N - firstrow, NB);
else
mt = magma_ceildiv( N - (firstrow+1), NB);
/*loop over the tiles find the size of the Vs and apply it */
for (blki=mt; blki > 0; blki--) {
/*calculate the size of each losange of Vs= (Vm,Vn)*/
myrow = firstrow + (mt-blki)*NB;
mycol = blkj*Vblksiz;
Vm = min( NB+Vblksiz-1, N-myrow);
if ( ( blkj == nt-1 ) && ( blki == mt ) ) {
Vn = min (Vblksiz, Vm);
} else {
Vn = min (Vblksiz, Vm-1);
}
/*calculate the pointer to the Vs and the Ts.
* Note that Vs and Ts have special storage done
* by the bulgechasing function*/
//printf("voici blkj %d blki %d Vm %d Vn %d mycol %d vpos %d \n",blkj,blki,Vm, Vn,mycol,vpos);
magma_bulge_findpos113(N, NB, Vblksiz, mycol, myrow, &blkid);
// COPY Vchunksiz Vs and Vchunksiz Ts to GPU and store it in dV0/dV1 and dT0/dT1
if (ncpy == 0) {
// flip = 1 for this.
copyst = 0; // meaning that copy will start copying from blkid =copyst
copyed = min(copyst+Vchunksiz, blkcnt); // meaning that copy will end copying at blkid =copyed-1==> next copy had to start at copyed
mysiz = copyed-copyst; // the size of the chunk to be copied
if (mysiz > 0) {
ncpy = 1;
flip = 1;
vpos = copyst*Vblksiz*ldv;
tpos = copyst*Vblksiz*ldt;
vld = mysiz * ldv;
tld = mysiz * ldt;
for( dev = 0; dev < ngpu; ++dev ) {
magma_setdevice( dev );
magmablasSetKernelStream( streams[ dev ][ 1 ] );
magma_csetmatrix_async(vld, Vblksiz, V(vpos), vld, dV1[dev], vld, streams[dev][1]);
magma_csetmatrix_async(tld, Vblksiz, T(tpos), tld, dT1[dev], tld, streams[dev][1]);
}
//printf("doing the first copy of mysiz %2d copyst %2d copyed %2d vpos %8d tpos %8d into dV1 dT1\n",mysiz,copyst,copyed,vpos,tpos);
}
}
if (blkid == copyst) {
flip = ncpy % 2;
copyst = copyed; // meaning that copy will start copying from blkid =copyst
copyed = min(copyst+Vchunksiz, blkcnt); // meaning that copy will end copying at blkid =copyed-1==> next copy had to start at copyed
mysiz = copyed-copyst; // the size of the chunk to be copied
//printf(" get to copy blkid %d blkid+(2*Vchunksiz) %d copyst %d copyed %d\n",blkid,blkid+(Vchunksiz),copyst,copyed);
if (mysiz > 0) {
ncpy = ncpy + 1;
vpos = copyst*Vblksiz*ldv;
tpos = copyst*Vblksiz*ldt;
vld = mysiz * ldv;
tld = mysiz * ldt;
if (flip == 0) { // now I am working on dV0 so copy the next and put it on dV1
//printf("doing overlapping copy of mysiz %2d copyst %2d copyed %2d vpos %8d tpos %8d into dV1 dT1\n",mysiz,copyst,copyed,vpos,tpos);
for( dev = 0; dev < ngpu; ++dev ) {
magma_setdevice( dev );
magmablasSetKernelStream( streams[ dev ][ 1 ] );
magma_csetmatrix_async(vld, Vblksiz, V(vpos), vld, dV1[dev], vld, streams[dev][1]);
magma_csetmatrix_async(tld, Vblksiz, T(tpos), tld, dT1[dev], tld, streams[dev][1]);
}
} else { // now I am working on dV1 so copy the next and put it on dV0
//printf("doing overlapping copy of mysiz %2d copyst %2d copyed %2d vpos %8d tpos %8d into dV0 dT0\n",mysiz,copyst,copyed,vpos,tpos);
for( dev = 0; dev < ngpu; ++dev ) {
magma_setdevice( dev );
magmablasSetKernelStream( streams[ dev ][ 0 ] );
magma_csetmatrix_async(vld, Vblksiz, V(vpos), vld, dV0[dev], vld, streams[dev][0]);
magma_csetmatrix_async(tld, Vblksiz, T(tpos), tld, dT0[dev], tld, streams[dev][0]);
}
}
}
}
if ((Vm > 0) && (Vn > 0)) {
locpos = blkid%Vchunksiz;
magma_int_t lcvpos = locpos*Vblksiz*lddv;
magma_int_t lctpos = locpos*Vblksiz*lddt;
//printf("voici blkj %d blki %d Vm %d Vn %d mycol %d locvpos %5d loctpos %5d blkid %2d using data in dV%1d dT%1d \n",blkj,blki,Vm, Vn,mycol,lcvpos,lctpos, blkid,flip,flip);
if (flip == 0) {
for( dev = 0; dev < ngpu; ++dev ) {
magma_int_t ie_loc = min(ne_loc, NE - ne_loc*dev);
magma_int_t nr_bl = magma_ceildiv(ie_loc,10000); //nr of blocks
magma_int_t sz_bl = magma_ceildiv(ie_loc,nr_bl*64)*64; //maximum size of blocks (to have blocks of around the same size and multiple of 64)
magma_int_t ib; //size of current block
magma_setdevice( dev );
magmablasSetKernelStream(streams[dev][0]);
magma_queue_wait_event( streams[dev][0], myevent[dev][1] );
for (magma_int_t i=0; i < ie_loc; i += sz_bl) {
ib = min(sz_bl, ie_loc-i);
//magma_clarfb_gpu( MagmaLeft, MagmaNoTrans, MagmaForward, MagmaColumnwise, Vm, ib, Vn, dV0[dev]+lcvpos, lddv, dT0[dev]+lctpos, lddt, dE(dev,myrow,i), ldde, dwork0[dev], ib);
magma_clarfb_gpu_gemm( MagmaLeft, MagmaNoTrans, MagmaForward, MagmaColumnwise, Vm, ib, Vn, dV0[dev]+lcvpos, lddv, dT0[dev]+lctpos, lddt, dE(dev,myrow,i), ldde, dwork0[dev], ib, dwvt0[dev], Vm);
}
magma_event_record( myevent[dev][0], streams[dev][0] );
}
} else {
for( dev = 0; dev < ngpu; ++dev ) {
magma_int_t ie_loc = min(ne_loc, NE - ne_loc*dev);
magma_int_t nr_bl = magma_ceildiv(ie_loc,10000); //nr of blocks
magma_int_t sz_bl = magma_ceildiv(ie_loc,nr_bl*64)*64; //maximum size of blocks (to have blocks of around the same size and multiple of 64)
magma_int_t ib; //size of current block
magma_setdevice( dev );
magmablasSetKernelStream(streams[dev][1]);
magma_queue_wait_event( streams[dev][1], myevent[dev][0] );
for (magma_int_t i=0; i < ie_loc; i += sz_bl) {
ib = min(sz_bl, ie_loc-i);
//magma_clarfb_gpu( MagmaLeft, MagmaNoTrans, MagmaForward, MagmaColumnwise, Vm, ib, Vn, dV1[dev]+lcvpos, lddv, dT1[dev]+lctpos, lddt, dE(dev,myrow,i), ldde, dwork1[dev], ib);
magma_clarfb_gpu_gemm( MagmaLeft, MagmaNoTrans, MagmaForward, MagmaColumnwise, Vm, ib, Vn, dV1[dev]+lcvpos, lddv, dT1[dev]+lctpos, lddt, dE(dev,myrow,i), ldde, dwork1[dev], ib, dwvt1[dev], Vm);
}
magma_event_record( myevent[dev][1], streams[dev][1] );
}
}
} // end for (Vm &Vn) > 0
} // end for blki
} // end for blkj
} // end if version=113
/*
* Version 114:
* loop over the block_row (mt) and for each find diagonally the
* number of tiles (nt) in this block_row. then loop over nt, find
* the size of the V's(Vm,Vn) and apply it to the corresponding
* portion of E.
*/
else {
printf("versionL 114 not implemented in cbulge_applyQ_v2_m\n");
exit(-1);
mt = magma_ceildiv((N-1),NB);
for (blki = mt; blki > 0; blki--) {
/* nbcolinvolvd = number of column corresponding to this block_row (blki) */
nbcolinvolvd = min(N-1, blki*NB);
/*find the number of tile for this block (diagonal row of tiles) */
nt = magma_ceildiv(nbcolinvolvd,Vblksiz);
/*loop over the tiles find the size of the Vs and apply it */
for (blkj = nt-1; blkj >= 0; blkj--) {
/* the index of the first row of the first col meaning
* the block on the top left (blki) */
firstrow = (mt-blki)*NB+1;
/*calculate the size of each losange of Vs= (Vm,Vn)*/
myrow = firstrow + blkj*Vblksiz;
mycol = blkj*Vblksiz;
Vm = min( NB+Vblksiz-1, N-myrow);
if ( ( blkj == nt-1 ) && ( blki == mt ) ) {
Vn = min (Vblksiz, Vm);
} else {
Vn = min (Vblksiz, Vm-1);
}
if ((Vm > 0) && (Vn > 0)) {
/*calculate the pointer to the Vs and the Ts.
* Note that Vs and Ts have special storage done
* by the bulgechasing function*/
/*
magma_bulge_findVTpos(N, NB, Vblksiz, mycol, myrow, ldv, ldt, &vpos, &tpos);
magma_csetmatrix_async(Vm, Vn, V(vpos), ldv, dV0, lddv, NULL);
magma_csetmatrix_async(Vn, Vn, T(tpos), ldt, dT0, lddt, NULL);
//printf("voici blki %d rownbm %d mycol %d coled %d blkid %d vpos %d tpos %d\n", blki, rownbm, mycol, coled, blkid, vpos, tpos);
for (magma_int_t i=0; i < NE; i += sz_bl) {
ib = min(sz_bl, NE-i);
magma_clarfb_gpu( MagmaLeft, MagmaNoTrans, MagmaForward, MagmaColumnwise, Vm, ib, Vn, dV0, lddv, dT0, lddt, dE(myrow,i), ldde, dwork, NE);
}
*/
} // end for (Vm &Vn) > 0
} // end for blkj
} // end for blki
} // end version 114
} // end LEFT
/*
* MagmaRight
*/
else {
printf("Side 'R' not implemented in cbulge_applyQ_v2_m\n");
exit(-1);
/*
* Version 91:
*/
if ( versionR == 91 ) {
nt = magma_ceildiv((N-1),Vblksiz);
for (blkj=0; blkj < nt; blkj++) {
/* the index of the first myrow on the top of block (blkj) */
firstrow = blkj * Vblksiz + 1;
/*find the number of tile for this block */
if ( blkj == nt-1 )
mt = magma_ceildiv( N - firstrow, NB);
else
mt = magma_ceildiv( N - (firstrow+1), NB);
/*loop over the tiles find the size of the Vs and apply it */
for (blki=1; blki <= mt; blki++) {
/*calculate the size of each losange of Vs= (Vm,Vn)*/
myrow = firstrow + (mt-blki)*NB;
Vm = min( NB+Vblksiz-1, N-myrow);
if ( (blkj == nt-1) && (blki == mt) ) {
Vn = min (Vblksiz, Vm);
} else {
Vn = min (Vblksiz, Vm-1);
}
mycol = blkj*Vblksiz;
if ((Vm > 0) && (Vn > 0)) {
/*calculate the pointer to the Vs and the Ts.
* Note that Vs and Ts have special storage done
* by the bulgechasing function*/
/*
magma_bulge_findVTpos(N, NB, Vblksiz, mycol, myrow, ldv, ldt, &vpos, &tpos);
magma_csetmatrix_async(Vm, Vn, V(vpos), ldv, dV0, lddv, NULL);
magma_csetmatrix_async(Vn, Vn, T(tpos), ldt, dT0, lddt, NULL);
magma_clarfb_gpu( MagmaRight, MagmaNoTrans, MagmaForward, MagmaColumnwise, NE, Vm, Vn, dV0, lddv, dT0, lddt, dE(0, myrow), ldde, dwork, NE);
*/
} // end for (Vm &Vn) > 0
} // end for blki
} // end fo blkj
} // end of version 91
/*
* Version 92:
*/
else {
mt = magma_ceildiv((N-1),NB);
for (blki = 1; blki <= mt; blki++) {
/* nbcolinvolvd = number of column corresponding to this block_row (blki) */
nbcolinvolvd = min(N-1, blki*NB);
/*find the number of tile for this block (diagonal row of tiles) */
nt = magma_ceildiv(nbcolinvolvd,Vblksiz);
/*loop over the tiles find the size of the Vs and apply it */
for (blkj = 0; blkj < nt; blkj++) {
/* the index of the first row of the first col meaning
* the block on the top left (blki) */
firstrow = (mt-blki)*NB+1;
/*calculate the size of each losange of Vs= (Vm,Vn)*/
myrow = firstrow + blkj*Vblksiz;
mycol = blkj*Vblksiz;
Vm = min( NB+Vblksiz-1, N-myrow);
if ( ( blkj == nt-1 ) && ( blki == mt ) ) {
Vn = min (Vblksiz, Vm);
} else {
Vn = min (Vblksiz, Vm-1);
}
if ((Vm > 0) && (Vn > 0)) {
/*calculate the pointer to the Vs and the Ts.
* Note that Vs and Ts have special storage done
* by the bulgechasing function*/
/*
magma_bulge_findVTpos(N, NB, Vblksiz, mycol, myrow, ldv, ldt, &vpos, &tpos);
magma_csetmatrix_async(Vm, Vn, V(vpos), ldv, dV0, lddv, NULL);
magma_csetmatrix_async(Vn, Vn, T(tpos), ldt, dT0, lddt, NULL);
magma_clarfb_gpu( MagmaRight, MagmaNoTrans, MagmaForward, MagmaColumnwise, NE, Vm, Vn, dV0, lddv, dT0, lddt, dE(0, myrow), ldde, dwork, NE);
*/
} // end for (Vm &Vn) > 0
} //end for blkj
} // end for blki
} //end of version 92
} // end RIGHT
// copy back the dE form each GPU
for( dev = 0; dev < ngpu; ++dev ) {
magma_setdevice( dev );
magmablasSetKernelStream(streams[dev][0]);
magma_queue_wait_event( streams[dev][0], myevent[dev][1] );
magma_queue_wait_event( streams[dev][0], myevent[dev][0] );
magma_int_t ie_loc = min(ne_loc, NE - ne_loc*dev);
magma_cgetmatrix_async( N, ie_loc, dE(dev, 0, 0), ldde, E+lde*ne_loc*dev, lde, streams[dev][0] );
magma_event_record( myevent[dev][0], streams[dev][0] );
}
for( magma_int_t dev = 0; dev < ngpu; ++dev ) {
magma_setdevice( dev );
magmablasSetKernelStream(streams[dev][0]);
magma_queue_wait_event( streams[dev][0], myevent[dev][0] );
magma_device_sync(); // no need for synchronize
magma_free(dwork[dev]);
magma_free(dE[dev]);
for( magma_int_t i = 0; i < nbevents; ++i ) {
magma_event_destroy( myevent[dev][i] );
}
for( magma_int_t i = 0; i < nstream; ++i ) {
magma_queue_destroy( streams[dev][i] );
}
}
magma_setdevice( orig_dev );
magmablasSetKernelStream( orig_stream );
return *info;
}
extern "C" magma_int_t
magma_cgeqrf_batched(
magma_int_t m, magma_int_t n,
magmaFloatComplex **dA_array,
magma_int_t ldda,
magmaFloatComplex **tau_array,
magma_int_t *info_array, magma_int_t batchCount, magma_queue_t queue)
{
#define dA(i, j) (dA + (i) + (j)*ldda) // A(i, j) means at i row, j column
magma_int_t min_mn = min(m, n);
cudaMemset(info_array, 0, batchCount*sizeof(magma_int_t));
/* Check arguments */
magma_int_t arginfo = 0;
if (m < 0)
arginfo = -1;
else if (n < 0)
arginfo = -2;
else if (ldda < max(1,m))
arginfo = -4;
if (arginfo != 0) {
magma_xerbla( __func__, -(arginfo) );
return arginfo;
}
/* Quick return if possible */
if (m == 0 || n == 0)
if(min_mn == 0 ) return arginfo;
if( m > 2048 || n > 2048 ){
printf("=========================================================================================\n");
printf(" WARNING batched routines are designed for small sizes it might be better to use the\n Native/Hybrid classical routines if you want performance\n");
printf("=========================================================================================\n");
}
magma_int_t nb = 32;
magma_int_t nnb = 8;
magma_int_t i, k, ib=nb, jb=nnb;
magma_int_t ldw, ldt, ldr, offset;
cublasHandle_t myhandle;
cublasCreate_v2(&myhandle);
magmaFloatComplex **dW0_displ = NULL;
magmaFloatComplex **dW1_displ = NULL;
magmaFloatComplex **dW2_displ = NULL;
magmaFloatComplex **dW3_displ = NULL;
magmaFloatComplex **dW4_displ = NULL;
magmaFloatComplex **dW5_displ = NULL;
magmaFloatComplex *dwork = NULL;
magmaFloatComplex *dT = NULL;
magmaFloatComplex *dR = NULL;
magmaFloatComplex **dR_array = NULL;
magmaFloatComplex **dT_array = NULL;
magmaFloatComplex **cpuAarray = NULL;
magmaFloatComplex **cpuTarray = NULL;
magma_malloc((void**)&dW0_displ, batchCount * sizeof(*dW0_displ));
magma_malloc((void**)&dW1_displ, batchCount * sizeof(*dW1_displ));
magma_malloc((void**)&dW2_displ, batchCount * sizeof(*dW2_displ));
magma_malloc((void**)&dW3_displ, batchCount * sizeof(*dW3_displ));
magma_malloc((void**)&dW4_displ, batchCount * sizeof(*dW4_displ)); // used in clarfb
magma_malloc((void**)&dW5_displ, batchCount * sizeof(*dW5_displ));
magma_malloc((void**)&dR_array, batchCount * sizeof(*dR_array));
magma_malloc((void**)&dT_array, batchCount * sizeof(*dT_array));
ldt = ldr = min(nb, min_mn);
magma_cmalloc(&dwork, (2 * nb * n) * batchCount);
magma_cmalloc(&dR, ldr * n * batchCount);
magma_cmalloc(&dT, ldt * ldt * batchCount);
magma_malloc_cpu((void**) &cpuAarray, batchCount*sizeof(magmaFloatComplex*));
magma_malloc_cpu((void**) &cpuTarray, batchCount*sizeof(magmaFloatComplex*));
/* check allocation */
if ( dW0_displ == NULL || dW1_displ == NULL || dW2_displ == NULL || dW3_displ == NULL ||
dW4_displ == NULL || dW5_displ == NULL || dR_array == NULL || dT_array == NULL ||
dR == NULL || dT == NULL || dwork == NULL || cpuAarray == NULL || cpuTarray == NULL ) {
magma_free(dW0_displ);
magma_free(dW1_displ);
magma_free(dW2_displ);
magma_free(dW3_displ);
magma_free(dW4_displ);
magma_free(dW5_displ);
magma_free(dR_array);
magma_free(dT_array);
magma_free(dR);
magma_free(dT);
magma_free(dwork);
free(cpuAarray);
free(cpuTarray);
magma_int_t info = MAGMA_ERR_DEVICE_ALLOC;
magma_xerbla( __func__, -(info) );
return info;
}
magmablas_claset_q(MagmaFull, ldr, n*batchCount , MAGMA_C_ZERO, MAGMA_C_ZERO, dR, ldr, queue);
magmablas_claset_q(MagmaFull, ldt, ldt*batchCount, MAGMA_C_ZERO, MAGMA_C_ZERO, dT, ldt, queue);
cset_pointer(dR_array, dR, 1, 0, 0, ldr*min(nb, min_mn), batchCount, queue);
cset_pointer(dT_array, dT, 1, 0, 0, ldt*min(nb, min_mn), batchCount, queue);
magma_queue_t cstream;
magmablasGetKernelStream(&cstream);
magma_int_t streamid;
const magma_int_t nbstreams=32;
magma_queue_t stream[nbstreams];
for(i=0; i<nbstreams; i++){
magma_queue_create( &stream[i] );
}
magma_getvector( batchCount, sizeof(magmaFloatComplex*), dA_array, 1, cpuAarray, 1);
magma_getvector( batchCount, sizeof(magmaFloatComplex*), dT_array, 1, cpuTarray, 1);
magmablasSetKernelStream(NULL);
for(i=0; i<min_mn;i+=nb)
{
ib = min(nb, min_mn-i);
//===============================================
// panel factorization
//===============================================
magma_cdisplace_pointers(dW0_displ, dA_array, ldda, i, i, batchCount, queue);
magma_cdisplace_pointers(dW2_displ, tau_array, 1, i, 0, batchCount, queue);
//dwork is used in panel factorization and trailing matrix update
//dW4_displ, dW5_displ are used as workspace and configured inside
magma_cgeqrf_panel_batched(m-i, ib, jb,
dW0_displ, ldda,
dW2_displ,
dT_array, ldt,
dR_array, ldr,
dW1_displ,
dW3_displ,
dwork,
dW4_displ, dW5_displ,
info_array,
batchCount, myhandle, queue);
//===============================================
// end of panel
//===============================================
//direct panel matrix V in dW0_displ,
magma_cdisplace_pointers(dW0_displ, dA_array, ldda, i, i, batchCount, queue);
// copy the upper part of V into dR
cgeqrf_copy_upper_batched(ib, jb, dW0_displ, ldda, dR_array, ldr, batchCount, queue);
//===============================================
// update trailing matrix
//===============================================
//dwork is used in panel factorization and trailing matrix update
//reset dW4_displ
ldw = nb;
cset_pointer(dW4_displ, dwork, 1, 0, 0, ldw*n, batchCount, queue );
offset = ldw*n*batchCount;
cset_pointer(dW5_displ, dwork + offset, 1, 0, 0, ldw*n, batchCount, queue );
if( (n-ib-i) > 0)
{
// set the diagonal of v as one and the upper triangular part as zero
magmablas_claset_batched(MagmaUpper, ib, ib, MAGMA_C_ZERO, MAGMA_C_ONE, dW0_displ, ldda, batchCount, queue);
magma_cdisplace_pointers(dW2_displ, tau_array, 1, i, 0, batchCount, queue);
// it is faster since it is using BLAS-3 GEMM routines, different from lapack implementation
magma_clarft_batched(m-i, ib, 0,
dW0_displ, ldda,
dW2_displ,
dT_array, ldt,
dW4_displ, nb*ldt,
batchCount, myhandle, queue);
// perform C = (I-V T^H V^H) * C, C is the trailing matrix
//-------------------------------------------
// USE STREAM GEMM
//-------------------------------------------
if( (m-i) > 100 && (n-i-ib) > 100)
{
// But since the code use the NULL stream everywhere,
// so I don't need it, because the NULL stream do the sync by itself
//magma_device_sync();
for(k=0; k<batchCount; k++)
{
streamid = k%nbstreams;
magmablasSetKernelStream(stream[streamid]);
// the stream gemm must take cpu pointer
magma_clarfb_gpu_gemm(MagmaLeft, MagmaConjTrans, MagmaForward, MagmaColumnwise,
m-i, n-i-ib, ib,
cpuAarray[k] + i + i * ldda, ldda,
cpuTarray[k], ldt,
cpuAarray[k] + i + (i+ib) * ldda, ldda,
dwork + nb * n * k, -1,
dwork + nb * n * batchCount + nb * n * k, -1);
}
// need to synchronise to be sure that panel does not start before
// finishing the update at least of the next panel
// BUT no need for it as soon as the other portion of the code
// use the NULL stream which do the sync by itself
//magma_device_sync();
magmablasSetKernelStream(NULL);
}
//-------------------------------------------
// USE BATCHED GEMM
//-------------------------------------------
else
{
//direct trailing matrix in dW1_displ
magma_cdisplace_pointers(dW1_displ, dA_array, ldda, i, i+ib, batchCount, queue);
magma_clarfb_gemm_batched(
MagmaLeft, MagmaConjTrans, MagmaForward, MagmaColumnwise,
m-i, n-i-ib, ib,
(const magmaFloatComplex**)dW0_displ, ldda,
(const magmaFloatComplex**)dT_array, ldt,
dW1_displ, ldda,
dW4_displ, ldw,
dW5_displ, ldw,
batchCount, myhandle, queue);
}
}// update the trailing matrix
//===============================================
// copy dR back to V after the trailing matrix update
magmablas_clacpy_batched(MagmaUpper, ib, ib, dR_array, ldr, dW0_displ, ldda, batchCount, queue);
}
for(k=0; k<nbstreams; k++){
magma_queue_destroy( stream[k] );
}
magmablasSetKernelStream(cstream);
cublasDestroy_v2(myhandle);
magma_free(dW0_displ);
magma_free(dW1_displ);
magma_free(dW2_displ);
magma_free(dW3_displ);
magma_free(dW4_displ);
magma_free(dW5_displ);
magma_free(dR_array);
magma_free(dT_array);
magma_free(dR);
magma_free(dT);
magma_free(dwork);
free(cpuAarray);
free(cpuTarray);
return arginfo;
}
