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/*
-- MAGMA (version 2.9.0) --
Univ. of Tennessee, Knoxville
Univ. of California, Berkeley
Univ. of Colorado, Denver
@date January 2025
@precisions normal z -> c d s
*/
// 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 "magma_operators.h"
#include "testings.h"
/* ////////////////////////////////////////////////////////////////////////////
-- Testing zaxpy
*/
int main(int argc, char **argv)
{
#define X(i_, j_) ( X + (i_) + (j_)*lda)
#define Y(i_, j_) ( Y + (i_) + (j_)*lda)
#define dX(i_, j_) (dX + (i_) + (j_)*ldda)
#define dY(i_, j_) (dY + (i_) + (j_)*ldda)
TESTING_CHECK( magma_init() );
magma_print_environment();
real_Double_t gflops, dev_perf, dev_time, cpu_perf, cpu_time;
double dev_error, work[1];
magma_int_t ione = 1;
magma_int_t ISEED[4] = {0,0,0,1};
magma_int_t M, N, lda, ldda, size;
magma_int_t incx = 1;
magma_int_t incy = 1;
magmaDoubleComplex c_neg_one = MAGMA_Z_NEG_ONE;
magmaDoubleComplex alpha = MAGMA_Z_MAKE( 1.5, -2.3 );
magmaDoubleComplex *X, *Y, *Yresult;
magmaDoubleComplex_ptr dX, dY;
int status = 0;
magma_opts opts;
opts.parse_opts( argc, argv );
// Allow 3*eps; complex needs 2*sqrt(2) factor; see Higham, 2002, sec. 3.6.
double eps = lapackf77_dlamch("E");
double tol = 3*eps;
printf("%% M cnt %s Gflop/s (ms) CPU Gflop/s (ms) %s error\n",
g_platform_str, g_platform_str );
printf("%%===========================================================================\n");
for( int itest = 0; itest < opts.ntest; ++itest ) {
for( int iter = 0; iter < opts.niter; ++iter ) {
// M is length of vector
// N is number of vectors
M = opts.msize[itest];
N = 100;
lda = magma_roundup( M, 8 ); // multiple of 8 by default (64 byte cache line aligned)
ldda = magma_roundup( lda, opts.align ); // multiple of 32 by default
gflops = 2*M*N / 1e9;
size = ldda*N;
//printf( "m %d, n %d, lda %d, ldda %d, size %d\n", M, N, lda, ldda, size );
TESTING_CHECK( magma_zmalloc_cpu( &X, size ));
TESTING_CHECK( magma_zmalloc_cpu( &Y, size ));
TESTING_CHECK( magma_zmalloc_cpu( &Yresult, size ));
TESTING_CHECK( magma_zmalloc( &dX, size ));
TESTING_CHECK( magma_zmalloc( &dY, size ));
/* Initialize the matrix */
lapackf77_zlarnv( &ione, ISEED, &size, X );
lapackf77_zlarnv( &ione, ISEED, &size, Y );
// for error checks
double Xnorm = lapackf77_zlange( "F", &M, &N, X, &lda, work );
double Ynorm = lapackf77_zlange( "F", &M, &N, Y, &lda, work );
/* =====================================================================
Performs operation using cuBLAS / clBLAS
=================================================================== */
magma_zsetmatrix( M, N, X, lda, dX, ldda, opts.queue );
magma_zsetmatrix( M, N, Y, lda, dY, ldda, opts.queue );
magma_flush_cache( opts.cache );
dev_time = magma_sync_wtime( opts.queue );
for (int j = 0; j < N; ++j) {
magma_zaxpy( M, alpha, dX(0,j), incx, dY(0,j), incy, opts.queue );
}
dev_time = magma_sync_wtime( opts.queue ) - dev_time;
dev_perf = gflops / dev_time;
magma_zgetmatrix( M, N, dY, ldda, Yresult, lda, opts.queue );
/* =====================================================================
Performs operation using CPU BLAS
=================================================================== */
magma_flush_cache( opts.cache );
cpu_time = magma_wtime();
for (int j = 0; j < N; ++j) {
blasf77_zaxpy( &M, &alpha, X(0,j), &incx, Y(0,j), &incy );
}
cpu_time = magma_wtime() - cpu_time;
cpu_perf = gflops / cpu_time;
/* =====================================================================
Check the result
=================================================================== */
// TODO: check error formula for axpy.
// See testing_zgemm for formula. Here K = N.
blasf77_zaxpy( &size, &c_neg_one, Y, &ione, Yresult, &ione );
dev_error = lapackf77_zlange( "F", &M, &N, Yresult, &lda, work )
/ (Xnorm + Ynorm);
bool okay = (dev_error < tol);
status += ! okay;
printf("%5lld %5lld %9.4f (%9.4f) %9.4f (%9.4f) %8.2e %s\n",
(long long) M, (long long) N,
dev_perf, 1000.*dev_time,
cpu_perf, 1000.*cpu_time,
dev_error,
(okay ? "ok" : "failed"));
magma_free_cpu( X );
magma_free_cpu( Y );
magma_free_cpu( Yresult );
magma_free( dX );
magma_free( dY );
fflush( stdout );
}
if ( opts.niter > 1 ) {
printf( "\n" );
}
}
opts.cleanup();
TESTING_CHECK( magma_finalize() );
return status;
}
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