void magmaf_sgesv(
magma_int_t *n, magma_int_t *nrhs,
float *A, magma_int_t *lda,
magma_int_t *ipiv,
float *B, magma_int_t *ldb,
magma_int_t *info,
magma_queue_t *queue )
{
magma_sgesv(
*n, *nrhs,
A, *lda,
ipiv,
B, *ldb,
info,
queue );
}
/* ////////////////////////////////////////////////////////////////////////////
-- Testing sgesv
*/
int main(int argc, char **argv)
{
TESTING_INIT();
real_Double_t gflops, cpu_perf, cpu_time, gpu_perf, gpu_time;
float error, lerror, Rnorm, Anorm, Xnorm, *work;
float c_one = MAGMA_S_ONE;
float c_neg_one = MAGMA_S_NEG_ONE;
float *h_A, *h_LU, *h_B, *h_B0, *h_X;
magma_int_t *ipiv;
magma_int_t N, nrhs, lda, ldb, info, sizeA, sizeB;
magma_int_t ione = 1;
magma_int_t ISEED[4] = {0,0,0,1};
magma_int_t status = 0;
magma_opts opts;
opts.parse_opts( argc, argv );
float tol = opts.tolerance * lapackf77_slamch("E");
nrhs = opts.nrhs;
printf("%% ngpu %d\n", (int) opts.ngpu );
if (opts.lapack) {
printf("%% N NRHS CPU Gflop/s (sec) GPU Gflop/s (sec) ||B - AX|| / N*||A||*||X|| ||B - AX|| / N*||A||*||X||_CPU\n");
printf("%%================================================================================================================\n");
} else {
printf("%% N NRHS CPU Gflop/s (sec) GPU Gflop/s (sec) ||B - AX|| / N*||A||*||X||\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;
ldb = lda;
gflops = ( FLOPS_SGETRF( N, N ) + FLOPS_SGETRS( N, nrhs ) ) / 1e9;
TESTING_MALLOC_CPU( h_A, float, lda*N );
TESTING_MALLOC_CPU( h_LU, float, lda*N );
TESTING_MALLOC_CPU( h_B0, float, ldb*nrhs );
TESTING_MALLOC_CPU( h_B, float, ldb*nrhs );
TESTING_MALLOC_CPU( h_X, float, ldb*nrhs );
TESTING_MALLOC_CPU( work, float, N );
TESTING_MALLOC_CPU( ipiv, magma_int_t, N );
/* Initialize the matrices */
sizeA = lda*N;
sizeB = ldb*nrhs;
lapackf77_slarnv( &ione, ISEED, &sizeA, h_A );
lapackf77_slarnv( &ione, ISEED, &sizeB, h_B );
// copy A to LU and B to X; save A and B for residual
lapackf77_slacpy( "F", &N, &N, h_A, &lda, h_LU, &lda );
lapackf77_slacpy( "F", &N, &nrhs, h_B, &ldb, h_X, &ldb );
lapackf77_slacpy( "F", &N, &nrhs, h_B, &ldb, h_B0, &ldb );
/* ====================================================================
Performs operation using MAGMA
=================================================================== */
gpu_time = magma_wtime();
magma_sgesv( N, nrhs, h_LU, lda, ipiv, h_X, ldb, &info );
gpu_time = magma_wtime() - gpu_time;
gpu_perf = gflops / gpu_time;
if (info != 0) {
printf("magma_sgesv returned error %d: %s.\n",
(int) info, magma_strerror( info ));
}
//=====================================================================
// Residual
//=====================================================================
Anorm = lapackf77_slange("I", &N, &N, h_A, &lda, work);
Xnorm = lapackf77_slange("I", &N, &nrhs, h_X, &ldb, work);
blasf77_sgemm( MagmaNoTransStr, MagmaNoTransStr, &N, &nrhs, &N,
&c_one, h_A, &lda,
h_X, &ldb,
&c_neg_one, h_B, &ldb);
Rnorm = lapackf77_slange("I", &N, &nrhs, h_B, &ldb, work);
error = Rnorm/(N*Anorm*Xnorm);
bool okay = (error < tol);
status += ! okay;
/* ====================================================================
Performs operation using LAPACK
=================================================================== */
if ( opts.lapack ) {
lapackf77_slacpy( "F", &N, &N, h_A, &lda, h_LU, &lda );
lapackf77_slacpy( "F", &N, &nrhs, h_B0, &ldb, h_X, &ldb );
cpu_time = magma_wtime();
lapackf77_sgesv( &N, &nrhs, h_LU, &lda, ipiv, h_X, &ldb, &info );
cpu_time = magma_wtime() - cpu_time;
cpu_perf = gflops / cpu_time;
if (info != 0) {
printf("lapackf77_sgesv returned error %d: %s.\n",
(int) info, magma_strerror( info ));
}
//Anorm = lapackf77_slange("I", &N, &N, h_A, &lda, work);
Xnorm = lapackf77_slange("I", &N, &nrhs, h_X, &ldb, work);
blasf77_sgemm( MagmaNoTransStr, MagmaNoTransStr, &N, &nrhs, &N,
&c_one, h_A, &lda,
h_X, &ldb,
&c_neg_one, h_B0, &ldb);
Rnorm = lapackf77_slange("I", &N, &nrhs, h_B0, &ldb, work);
lerror = Rnorm/(N*Anorm*Xnorm);
bool lokay = (lerror < tol);
printf( "%5d %5d %7.2f (%7.2f) %7.2f (%7.2f) %8.2e %-6s %8.2e %s\n",
(int) N, (int) nrhs, cpu_perf, cpu_time, gpu_perf, gpu_time,
error, (okay ? "ok" : "failed"),
lerror, (lokay ? "ok" : "failed"));
}
else {
printf( "%5d %5d --- ( --- ) %7.2f (%7.2f) %8.2e %s\n",
(int) N, (int) nrhs, gpu_perf, gpu_time,
error, (okay ? "ok" : "failed"));
}
TESTING_FREE_CPU( h_A );
TESTING_FREE_CPU( h_LU );
TESTING_FREE_CPU( h_B0 );
TESTING_FREE_CPU( h_B );
TESTING_FREE_CPU( h_X );
TESTING_FREE_CPU( work );
TESTING_FREE_CPU( ipiv );
fflush( stdout );
}
if ( opts.niter > 1 ) {
printf( "\n" );
}
}
opts.cleanup();
TESTING_FINALIZE();
return status;
}