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/*
-- MAGMA (version 2.9.0) --
Univ. of Tennessee, Knoxville
Univ. of California, Berkeley
Univ. of Colorado, Denver
@date January 2025
@author Mark gates
@author Ahmad Abdelfattah
@generated from testing/testing_zgbsv_gpu.cpp, normal z -> c, Wed Jan 22 14:40:30 2025
*/
// includes, system
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
// includes, project
#include "flops.h"
#include "magma_v2.h"
#include "magma_lapack.h"
#include "testings.h"
#if defined(_OPENMP)
#include <omp.h>
#include "../control/magma_threadsetting.h" // internal header
#endif
/* ////////////////////////////////////////////////////////////////////////////
-- Testing cgesv_batched
*/
int main(int argc, char **argv)
{
TESTING_CHECK( magma_init() );
magma_print_environment();
real_Double_t gflops, cpu_perf, cpu_time, gpu_perf, gpu_time = 0;
float error, Rnorm, Anorm, Xnorm, *work;
magmaFloatComplex c_one = MAGMA_C_ONE;
magmaFloatComplex c_neg_one = MAGMA_C_NEG_ONE;
magmaFloatComplex *h_A, *h_B, *h_X;
magmaFloatComplex_ptr d_A, d_B;
magma_int_t *dipiv;
magma_int_t *ipiv;
magma_int_t N, Nband, KL, KU, KV, nrhs, lda, ldb, ldda, lddb, info = 0, sizeA, sizeB;
magma_int_t ione = 1;
magma_int_t ISEED[4] = {0,0,0,1};
int status = 0;
magma_opts opts;
opts.parse_opts( argc, argv );
float tol = opts.tolerance * lapackf77_slamch("E");
nrhs = opts.nrhs;
KL = opts.kl;
KU = opts.ku;
KV = KL + KU;
printf("%% ## INFO ##: Gflop/s calculation is not available\n");
printf("%% Lower bandwidth (KL) = %lld\n", (long long)KL);
printf("%% Upper bandwidth (KU) = %lld\n", (long long)KU);
printf("%% N NRHS CPU Gflop/s (ms) GPU Gflop/s (ms) ||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];
Nband = KL + 1 + KV; // need extra KL superdiagonals for the upper factor
lda = Nband;
ldb = N;
ldda = magma_roundup( lda, opts.align ); // multiple of 32 by default
lddb = magma_roundup( ldb, opts.align );
gflops = 0.; // TODO: gflop formula for gbsv?
sizeA = lda*N;
sizeB = ldb*nrhs;
TESTING_CHECK( magma_cmalloc_cpu( &h_A, sizeA ));
TESTING_CHECK( magma_cmalloc_cpu( &h_B, sizeB ));
TESTING_CHECK( magma_cmalloc_cpu( &h_X, sizeB ));
TESTING_CHECK( magma_smalloc_cpu( &work, N ));
TESTING_CHECK( magma_imalloc_cpu( &ipiv, N ));
TESTING_CHECK( magma_cmalloc( &d_A, ldda*N ));
TESTING_CHECK( magma_cmalloc( &d_B, lddb*nrhs ));
TESTING_CHECK( magma_imalloc( &dipiv, N ));
/* Initialize the matrices */
lapackf77_clarnv( &ione, ISEED, &sizeA, h_A );
lapackf77_clarnv( &ione, ISEED, &sizeB, h_B );
// random initialization of h_A seems to produce
// some matrices that are singular, the additive statements below
// seem to avoid that
#pragma omp parallel for schedule(dynamic)
for(int j = 0; j < lda*N; j++) {
MAGMA_C_REAL( h_A[j] ) += 20.;
#if defined(PRECISION_c) || defined(PRECISION_z)
MAGMA_C_IMAG( h_A[j] ) += 20.;
#endif
}
magma_csetmatrix( Nband, N, h_A, lda, d_A, ldda, opts.queue );
magma_csetmatrix( N, nrhs, h_B, ldb, d_B, lddb, opts.queue );
/* ====================================================================
Performs operation using MAGMA
=================================================================== */
if(opts.version == 1) {
// sync. interface
gpu_time = magma_wtime();
magma_cgbsv_native(
N, KL, KU, nrhs,
d_A, ldda, dipiv,
d_B, lddb, &info);
gpu_time = magma_wtime() - gpu_time;
}
else {
// async. interface
// query wrokspace
magma_int_t lwork[1] = {-1};
magma_cgbsv_native_work(
N, KL, KU, nrhs,
NULL, ldda, NULL,
NULL, lddb, &info, NULL, lwork, opts.queue);
void* device_work = NULL;
TESTING_CHECK( magma_malloc(&device_work, lwork[0]) );
// time async. call only
gpu_time = magma_sync_wtime( opts.queue );
magma_cgbsv_native_work(
N, KL, KU, nrhs,
d_A, ldda, dipiv,
d_B, lddb, &info, device_work, lwork, opts.queue);
gpu_time = magma_sync_wtime( opts.queue ) - gpu_time;
magma_free( device_work );
}
gpu_perf = gflops / gpu_time;
if (info != 0) {
printf("magma_cgbsv_gpu returned error %lld: %s.\n",
(long long) info, magma_strerror( info ));
}
//=====================================================================
// Residual
//=====================================================================
magma_cgetmatrix( N, nrhs, d_B, lddb, h_X, ldb, opts.queue );
error = 0;
Anorm = lapackf77_clangb("I", &N, &KL, &KU, h_A + KL, &lda, work);
Xnorm = lapackf77_clange("I", &N, &nrhs, h_X, &ldb, work);
for(magma_int_t j = 0; j < nrhs; j++) {
blasf77_cgbmv( MagmaNoTransStr, &N, &N, &KL, &KU,
&c_one, h_A + KL , &lda,
h_X + j * ldb, &ione,
&c_neg_one, h_B + j * ldb, &ione);
}
Rnorm = lapackf77_clange("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 ) {
cpu_time = magma_wtime();
lapackf77_cgbsv(&N, &KL, &KU, &nrhs, h_A, &lda, ipiv, h_B, &ldb, &info );
cpu_time = magma_wtime() - cpu_time;
cpu_perf = gflops / cpu_time;
if (info != 0) {
printf("lapackf77_cgesv returned error %lld: %s.\n",
(long long)info, magma_strerror( info ));
}
printf( "%5lld %5lld %7.2f (%7.2f) %7.2f (%7.2f) %8.2e %s\n",
(long long) N, (long long) nrhs,
cpu_perf, 1000.*cpu_time, gpu_perf, 1000.*gpu_time,
error, (okay ? "ok" : "failed"));
}
else {
printf( "%5lld %5lld --- ( --- ) %7.2f (%7.2f) %8.2e %s\n",
(long long) N, (long long) nrhs,
gpu_perf, 1000.*gpu_time,
error, (okay ? "ok" : "failed"));
}
magma_free_cpu( h_A );
magma_free_cpu( h_B );
magma_free_cpu( h_X );
magma_free_cpu( work );
magma_free_cpu( ipiv );
magma_free( d_A );
magma_free( d_B );
magma_free( dipiv );
fflush( stdout );
}
if ( opts.niter > 1 ) {
printf( "\n" );
}
}
opts.cleanup();
TESTING_CHECK( magma_finalize() );
return status;
}
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