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/*
-- MAGMA (version 2.9.0) --
Univ. of Tennessee, Knoxville
Univ. of California, Berkeley
Univ. of Colorado, Denver
@date January 2025
@generated from testing/testing_zgetf2_gpu.cpp, normal z -> d, Wed Jan 22 14:40:29 2025
*/
// includes, system
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
// includes, project
#include "flops.h"
#include "magma_v2.h"
#include "magma_lapack.h"
#include "testings.h"
double get_LU_error(magma_int_t M, magma_int_t N,
double *A, magma_int_t lda,
double *LU, magma_int_t *IPIV)
{
magma_int_t min_mn = min(M,N);
magma_int_t ione = 1;
magma_int_t i, j;
double alpha = MAGMA_D_ONE;
double beta = MAGMA_D_ZERO;
double *L, *U;
double work[1], matnorm, residual;
TESTING_CHECK( magma_dmalloc_cpu( &L, M*min_mn ));
TESTING_CHECK( magma_dmalloc_cpu( &U, min_mn*N ));
memset( L, 0, M*min_mn*sizeof(double) );
memset( U, 0, min_mn*N*sizeof(double) );
lapackf77_dlaswp( &N, A, &lda, &ione, &min_mn, IPIV, &ione);
lapackf77_dlacpy( MagmaLowerStr, &M, &min_mn, LU, &lda, L, &M );
lapackf77_dlacpy( MagmaUpperStr, &min_mn, &N, LU, &lda, U, &min_mn );
for (j=0; j < min_mn; j++)
L[j+j*M] = MAGMA_D_MAKE( 1., 0. );
matnorm = lapackf77_dlange("f", &M, &N, A, &lda, work);
blasf77_dgemm("N", "N", &M, &N, &min_mn,
&alpha, L, &M, U, &min_mn, &beta, LU, &lda);
for( j = 0; j < N; j++ ) {
for( i = 0; i < M; i++ ) {
LU[i+j*lda] = MAGMA_D_SUB( LU[i+j*lda], A[i+j*lda] );
}
}
residual = lapackf77_dlange("f", &M, &N, LU, &lda, work);
magma_free_cpu( L );
magma_free_cpu( U );
return residual / (matnorm * N);
}
/* ////////////////////////////////////////////////////////////////////////////
-- Testing dgetrf
*/
int main( int argc, char** argv)
{
TESTING_CHECK( magma_init() );
magma_print_environment();
real_Double_t gflops, gpu_perf, gpu_time, cpu_perf=0, cpu_time=0;
double error;
double *h_A, *h_R;
magmaDouble_ptr d_A;
magma_int_t *ipiv;
magma_int_t M, N, n2, lda, ldda, info, min_mn;
int status = 0;
magma_opts opts;
opts.parse_opts( argc, argv );
double tol = opts.tolerance * lapackf77_dlamch("E");
printf("%% M N CPU Gflop/s (ms) GPU Gflop/s (ms) Copy time (ms) ||PA-LU||/(||A||*N)\n");
printf("%%======================================================================================\n");
for( int itest = 0; itest < opts.ntest; ++itest ) {
for( int iter = 0; iter < opts.niter; ++iter ) {
M = opts.msize[itest];
N = opts.nsize[itest];
min_mn = min(M, N);
lda = M;
n2 = lda*N;
ldda = magma_roundup( M, opts.align ); // multiple of 32 by default
gflops = FLOPS_DGETRF( M, N ) / 1e9;
if ( N > 512 ) {
printf( "%5lld %5lld skipping because dgetf2 does not support N > 512\n", (long long) M, (long long) N );
continue;
}
TESTING_CHECK( magma_imalloc_cpu( &ipiv, min_mn ));
TESTING_CHECK( magma_dmalloc_cpu( &h_A, n2 ));
TESTING_CHECK( magma_dmalloc_pinned( &h_R, n2 ));
TESTING_CHECK( magma_dmalloc( &d_A, ldda*N ));
/* Initialize the matrix */
magma_generate_matrix( opts, M, N, h_A, lda );
lapackf77_dlacpy( MagmaFullStr, &M, &N, h_A, &lda, h_R, &lda );
real_Double_t set_time = magma_wtime();
magma_dsetmatrix( M, N, h_R, lda, d_A, ldda, opts.queue );
set_time = magma_wtime() - set_time;
/* =====================================================================
Performs operation using LAPACK
=================================================================== */
if ( opts.lapack ) {
cpu_time = magma_wtime();
lapackf77_dgetrf( &M, &N, h_A, &lda, ipiv, &info );
cpu_time = magma_wtime() - cpu_time;
cpu_perf = gflops / cpu_time;
if (info != 0) {
printf("lapackf77_dgetrf returned error %lld: %s.\n",
(long long) info, magma_strerror( info ));
}
}
/* ====================================================================
Performs operation using MAGMA
=================================================================== */
gpu_time = magma_sync_wtime( opts.queue );
magma_dgetf2_gpu( M, N, d_A, ldda, ipiv, opts.queue, &info );
gpu_time = magma_sync_wtime( opts.queue ) - gpu_time;
gpu_perf = gflops / gpu_time;
if (info != 0) {
printf("magma_dgetf2_gpu returned error %lld: %s.\n",
(long long) info, magma_strerror( info ));
}
real_Double_t get_time = magma_wtime();
magma_dgetmatrix( M, N, d_A, ldda, h_A, lda, opts.queue );
get_time = magma_wtime() - get_time;
/* =====================================================================
Check the factorization
=================================================================== */
if ( opts.lapack ) {
printf("%5lld %5lld %7.2f (%7.2f) %7.2f (%7.2f) %7.2f",
(long long) M, (long long) N, cpu_perf, cpu_time*1000., gpu_perf, gpu_time*1000.,
set_time*1000.+get_time*1000.);
}
else {
printf("%5lld %5lld --- ( --- ) %7.2f (%7.2f) %7.2f",
(long long) M, (long long) N, gpu_perf, gpu_time*1000., set_time*1000.+get_time*1000. );
}
if ( opts.check ) {
magma_dgetmatrix( M, N, d_A, ldda, h_A, lda, opts.queue );
error = get_LU_error( M, N, h_R, lda, h_A, ipiv );
printf(" %8.2e %s\n", error, (error < tol ? "ok" : "failed") );
status += ! (error < tol);
}
else {
printf(" --- \n");
}
magma_free_cpu( ipiv );
magma_free_cpu( h_A );
magma_free_pinned( h_R );
magma_free( d_A );
fflush( stdout );
}
if ( opts.niter > 1 ) {
printf( "\n" );
}
}
opts.cleanup();
TESTING_CHECK( magma_finalize() );
return status;
}
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