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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_zgeqrf_mgpu.cpp, normal z -> c, Wed Jan 22 14:40:34 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"
/* ////////////////////////////////////////////////////////////////////////////
-- Testing cgeqrf_mgpu
*/
int main( int argc, char** argv )
{
TESTING_CHECK( magma_init() );
magma_print_environment();
const float d_neg_one = MAGMA_D_NEG_ONE;
const float d_one = MAGMA_D_ONE;
const magmaFloatComplex c_neg_one = MAGMA_C_NEG_ONE;
const magmaFloatComplex c_one = MAGMA_C_ONE;
const magmaFloatComplex c_zero = MAGMA_C_ZERO;
real_Double_t gflops, gpu_perf, gpu_time, cpu_perf=0, cpu_time=0;
float Anorm, error=0, error2=0;
magmaFloatComplex *h_A, *h_R, *tau, *h_work, tmp[1], unused[1];
magmaFloatComplex_ptr d_lA[ MagmaMaxGPUs ];
magma_int_t M, N, n2, lda, lwork, info, min_mn, nb;
magma_int_t ldda, n_local, ngpu;
magma_opts opts;
opts.parse_opts( argc, argv );
opts.ngpu = abs( opts.ngpu ); // always uses multi-GPU code
int status = 0;
float tol = opts.tolerance * lapackf77_slamch("E");
magma_queue_t queues[MagmaMaxGPUs];
for( int dev = 0; dev < opts.ngpu; ++dev ) {
magma_queue_create( dev, &queues[dev] );
}
printf("%% ngpu %lld\n", (long long) opts.ngpu );
printf("%% M N CPU Gflop/s (sec) GPU Gflop/s (sec) |R - Q^H*A| |I - Q^H*Q|\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
nb = magma_get_cgeqrf_nb( M, N );
gflops = FLOPS_CGEQRF( M, N ) / 1e9;
// ngpu must be at least the number of blocks
ngpu = min( opts.ngpu, magma_ceildiv(N,nb) );
if ( ngpu < opts.ngpu ) {
printf( " * too many GPUs for the matrix size, using %lld GPUs\n", (long long) ngpu );
}
// query for workspace size
lwork = -1;
lapackf77_cgeqrf( &M, &N, unused, &M, unused, tmp, &lwork, &info );
lwork = (magma_int_t) MAGMA_C_REAL( tmp[0] );
lwork = max( lwork, N*nb );
// Allocate host memory for the matrix
TESTING_CHECK( magma_cmalloc_cpu( &tau, min_mn ));
TESTING_CHECK( magma_cmalloc_cpu( &h_A, n2 ));
TESTING_CHECK( magma_cmalloc_cpu( &h_work, lwork ));
TESTING_CHECK( magma_cmalloc_pinned( &h_R, n2 ));
// Allocate device memory
for( int dev = 0; dev < ngpu; dev++ ) {
n_local = ((N/nb)/ngpu)*nb;
if (dev < (N/nb) % ngpu)
n_local += nb;
else if (dev == (N/nb) % ngpu)
n_local += N % nb;
magma_setdevice( dev );
TESTING_CHECK( magma_cmalloc( &d_lA[dev], ldda*n_local ));
}
/* Initialize the matrix */
magma_generate_matrix( opts, M, N, h_A, lda );
lapackf77_clacpy( MagmaFullStr, &M, &N, h_A, &lda, h_R, &lda );
/* ====================================================================
Performs operation using MAGMA
=================================================================== */
magma_csetmatrix_1D_col_bcyclic( ngpu, M, N, nb, h_R, lda, d_lA, ldda, queues );
gpu_time = magma_wtime();
magma_cgeqrf2_mgpu( ngpu, M, N, d_lA, ldda, tau, &info );
gpu_time = magma_wtime() - gpu_time;
gpu_perf = gflops / gpu_time;
if (info != 0) {
printf("magma_cgeqrf2_mgpu returned error %lld: %s.\n",
(long long) info, magma_strerror( info ));
}
magma_cgetmatrix_1D_col_bcyclic( ngpu, M, N, nb, d_lA, ldda, h_R, lda, queues );
/* =====================================================================
Check the result, following zqrt01 except using the reduced Q.
This works for any M,N (square, tall, wide).
=================================================================== */
if ( opts.check ) {
magma_int_t ldq = M;
magma_int_t ldr = min_mn;
magmaFloatComplex *Q, *R;
float *work;
TESTING_CHECK( magma_cmalloc_cpu( &Q, ldq*min_mn )); // M by K
TESTING_CHECK( magma_cmalloc_cpu( &R, ldr*N )); // K by N
TESTING_CHECK( magma_smalloc_cpu( &work, min_mn ));
// generate M by K matrix Q, where K = min(M,N)
lapackf77_clacpy( "Lower", &M, &min_mn, h_R, &lda, Q, &ldq );
lapackf77_cungqr( &M, &min_mn, &min_mn, Q, &ldq, tau, h_work, &lwork, &info );
assert( info == 0 );
// copy K by N matrix R
lapackf77_claset( "Lower", &min_mn, &N, &c_zero, &c_zero, R, &ldr );
lapackf77_clacpy( "Upper", &min_mn, &N, h_R, &lda, R, &ldr );
// error = || R - Q^H*A || / (N * ||A||)
blasf77_cgemm( "Conj", "NoTrans", &min_mn, &N, &M,
&c_neg_one, Q, &ldq, h_A, &lda, &c_one, R, &ldr );
Anorm = lapackf77_clange( "1", &M, &N, h_A, &lda, work );
error = lapackf77_clange( "1", &min_mn, &N, R, &ldr, work );
if ( N > 0 && Anorm > 0 )
error /= (N*Anorm);
// set R = I (K by K identity), then R = I - Q^H*Q
// error = || I - Q^H*Q || / N
lapackf77_claset( "Upper", &min_mn, &min_mn, &c_zero, &c_one, R, &ldr );
blasf77_cherk( "Upper", "Conj", &min_mn, &M, &d_neg_one, Q, &ldq, &d_one, R, &ldr );
error2 = safe_lapackf77_clanhe( "1", "Upper", &min_mn, R, &ldr, work );
if ( N > 0 )
error2 /= N;
magma_free_cpu( Q ); Q = NULL;
magma_free_cpu( R ); R = NULL;
magma_free_cpu( work ); work = NULL;
}
/* =====================================================================
Performs operation using LAPACK
=================================================================== */
if ( opts.lapack ) {
cpu_time = magma_wtime();
lapackf77_cgeqrf( &M, &N, h_A, &lda, tau, h_work, &lwork, &info );
cpu_time = magma_wtime() - cpu_time;
cpu_perf = gflops / cpu_time;
if (info != 0) {
printf("lapackf77_cgeqrf returned error %lld: %s.\n",
(long long) info, magma_strerror( info ));
}
}
/* =====================================================================
Print performance and error.
=================================================================== */
printf("%5lld %5lld ", (long long) M, (long long) N );
if ( opts.lapack ) {
printf( "%7.2f (%7.2f)", cpu_perf, cpu_time );
}
else {
printf(" --- ( --- )" );
}
printf( " %7.2f (%7.2f) ", gpu_perf, gpu_time );
if ( opts.check ) {
bool okay = (error < tol && error2 < tol);
status += ! okay;
printf( "%11.2e %11.2e %s\n", error, error2, (okay ? "ok" : "failed") );
}
else {
printf( " ---\n" );
}
magma_free_cpu( tau );
magma_free_cpu( h_A );
magma_free_cpu( h_work );
magma_free_pinned( h_R );
for( int dev=0; dev < ngpu; dev++ ) {
magma_setdevice( dev );
magma_free( d_lA[dev] );
}
fflush( stdout );
}
if ( opts.niter > 1 ) {
printf( "\n" );
}
}
for( int dev = 0; dev < opts.ngpu; ++dev ) {
magma_queue_destroy( queues[dev] );
}
opts.cleanup();
TESTING_CHECK( magma_finalize() );
return status;
}
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