コード例 #1
0
void magmaf_dgesv(
    magma_int_t *n, magma_int_t *nrhs,
    double *A, magma_int_t *lda,
    magma_int_t *ipiv,
    double *B, magma_int_t *ldb,
    magma_int_t *info )
{
    magma_dgesv(
        *n, *nrhs,
        A, *lda,
        ipiv,
        B, *ldb,
        info );
}
コード例 #2
0
ファイル: testing_dgesv.cpp プロジェクト: EmergentOrder/magma
/* ////////////////////////////////////////////////////////////////////////////
   -- Testing dgesv
*/
int main(int argc, char **argv)
{
    TESTING_INIT();

    real_Double_t   gflops, cpu_perf, cpu_time, gpu_perf, gpu_time;
    double          error, Rnorm, Anorm, Xnorm, *work;
    double c_one     = MAGMA_D_ONE;
    double c_neg_one = MAGMA_D_NEG_ONE;
    double *h_A, *h_LU, *h_B, *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;
    parse_opts( argc, argv, &opts );
    
    double tol = opts.tolerance * lapackf77_dlamch("E");
    
    nrhs = opts.nrhs;
    
    printf("ngpu %d\n", (int) opts.ngpu );
    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_DGETRF( N, N ) + FLOPS_DGETRS( N, nrhs ) ) / 1e9;
            
            TESTING_MALLOC_CPU( h_A,  double, lda*N    );
            TESTING_MALLOC_CPU( h_LU, double, lda*N    );
            TESTING_MALLOC_CPU( h_B,  double, ldb*nrhs );
            TESTING_MALLOC_CPU( h_X,  double, ldb*nrhs );
            TESTING_MALLOC_CPU( work, double,             N        );
            TESTING_MALLOC_CPU( ipiv, magma_int_t,        N        );
            
            /* Initialize the matrices */
            sizeA = lda*N;
            sizeB = ldb*nrhs;
            lapackf77_dlarnv( &ione, ISEED, &sizeA, h_A );
            lapackf77_dlarnv( &ione, ISEED, &sizeB, h_B );
            
            // copy A to LU and B to X; save A and B for residual
            lapackf77_dlacpy( "F", &N, &N,    h_A, &lda, h_LU, &lda );
            lapackf77_dlacpy( "F", &N, &nrhs, h_B, &ldb, h_X,  &ldb );
            
            /* ====================================================================
               Performs operation using MAGMA
               =================================================================== */
            gpu_time = magma_wtime();
            magma_dgesv( 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_dgesv returned error %d: %s.\n",
                       (int) info, magma_strerror( info ));
            
            //=====================================================================
            // Residual
            //=====================================================================
            Anorm = lapackf77_dlange("I", &N, &N,    h_A, &lda, work);
            Xnorm = lapackf77_dlange("I", &N, &nrhs, h_X, &ldb, work);
            
            blasf77_dgemm( MagmaNoTransStr, MagmaNoTransStr, &N, &nrhs, &N,
                           &c_one,     h_A, &lda,
                                       h_X, &ldb,
                           &c_neg_one, h_B, &ldb);
            
            Rnorm = lapackf77_dlange("I", &N, &nrhs, h_B, &ldb, work);
            error = Rnorm/(N*Anorm*Xnorm);
            status += ! (error < tol);
            
            /* ====================================================================
               Performs operation using LAPACK
               =================================================================== */
            if ( opts.lapack ) {
                cpu_time = magma_wtime();
                lapackf77_dgesv( &N, &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_dgesv returned error %d: %s.\n",
                           (int) info, magma_strerror( info ));
                
                printf( "%5d %5d   %7.2f (%7.2f)   %7.2f (%7.2f)   %8.2e   %s\n",
                        (int) N, (int) nrhs, cpu_perf, cpu_time, gpu_perf, gpu_time,
                        error, (error < tol ? "ok" : "failed"));
            }
            else {
                printf( "%5d %5d     ---   (  ---  )   %7.2f (%7.2f)   %8.2e   %s\n",
                        (int) N, (int) nrhs, gpu_perf, gpu_time,
                        error, (error < tol ? "ok" : "failed"));
            }
            
            TESTING_FREE_CPU( h_A  );
            TESTING_FREE_CPU( h_LU );
            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" );
        }
    }

    TESTING_FINALIZE();
    return status;
}
コード例 #3
0
ファイル: testing_dgesv.cpp プロジェクト: cjy7117/DVFS-MAGMA
/* ////////////////////////////////////////////////////////////////////////////
   -- Testing dgesv
*/
int main(int argc , char **argv)
{
    TESTING_CUDA_INIT();

    real_Double_t   gflops, gpu_perf, gpu_time;
    double          Rnorm, Anorm, Xnorm, *work;
    double c_one     = MAGMA_D_ONE;
    double c_neg_one = MAGMA_D_NEG_ONE;
    double *h_A, *h_LU, *h_B, *h_X;
    magma_int_t *ipiv;
    magma_int_t lda, ldb;
    magma_int_t i, info, szeA, szeB;
    magma_int_t ione     = 1;
    magma_int_t N        = 0;
    magma_int_t NRHS     = 100;
    magma_int_t ISEED[4] = {0,0,0,1};
    const int MAXTESTS   = 10;
    magma_int_t size[MAXTESTS] = { 1024, 2048, 3072, 4032, 5184, 6016, 7040, 8064, 9088, 10112 };
    
    // process command line arguments
    printf( "\nUsage: %s -N <matrix size> -R <right hand sides>\n", argv[0] );
    printf( "  -N can be repeated up to %d times\n\n", MAXTESTS );
    int ntest = 0;
    for( int i = 1; i < argc; ++i ) {
        if ( strcmp("-N", argv[i]) == 0 && i+1 < argc ) {
            magma_assert( ntest < MAXTESTS, "error: -N repeated more than maximum %d tests\n", MAXTESTS );
            size[ntest] = atoi( argv[++i] );
            magma_assert( size[ntest] > 0, "error: -N %s is invalid; must be > 0.\n", argv[i] );
            N = max( N, size[ntest] );
            ntest++;
        }
        else if ( strcmp("-R", argv[i]) == 0 && i+1 < argc ) {
            NRHS = atoi( argv[++i] );
            magma_assert( NRHS > 0, "error: -R %is is invalid; must be > 0.\n", argv[i] );
        }
        else {
            printf( "invalid argument: %s\n", argv[i] );
            exit(1);
        }
    }
    if ( ntest == 0 ) {
        ntest = MAXTESTS;
        N = size[ntest-1];
    }
    
    // allocate maximum amount of memory required
    lda = ldb = N;
    TESTING_MALLOC( h_A,  double, lda*N    );
    TESTING_MALLOC( h_LU, double, lda*N    );
    TESTING_MALLOC( h_B,  double, ldb*NRHS );
    TESTING_MALLOC( h_X,  double, ldb*NRHS );
    TESTING_MALLOC( work, double,          N        );
    TESTING_MALLOC( ipiv, magma_int_t,     N        );

    printf("    N   NRHS   GPU GFlop/s (sec)   ||B - AX|| / ||A||*||X||\n");
    printf("===========================================================\n");

    for( i = 0; i < ntest; ++i ) {
        N   = size[i];
        lda = ldb = N;
        gflops = ( FLOPS_DGETRF( (double)N, (double)N ) +
                   FLOPS_DGETRS( (double)N, (double)NRHS ) ) / 1e9;

        /* Initialize the matrices */
        szeA = lda*N;
        szeB = ldb*NRHS;
        lapackf77_dlarnv( &ione, ISEED, &szeA, h_A );
        lapackf77_dlarnv( &ione, ISEED, &szeB, h_B );
        
        // copy A to LU and B to X; save A and B for residual
        lapackf77_dlacpy( "F", &N, &N,    h_A, &lda, h_LU, &lda );
        lapackf77_dlacpy( "F", &N, &NRHS, h_B, &ldb, h_X,  &ldb );

        //=====================================================================
        // Solve Ax = b through an LU factorization
        //=====================================================================
        gpu_time = magma_wtime();
        magma_dgesv( N, NRHS, h_LU, lda, ipiv, h_X, ldb, &info );
        gpu_time = magma_wtime() - gpu_time;
        if (info != 0)
            printf("magma_dgesv returned error %d.\n", (int) info);

        gpu_perf = gflops / gpu_time;

        //=====================================================================
        // Residual
        //=====================================================================
        Anorm = lapackf77_dlange("I", &N, &N,    h_A, &lda, work);
        Xnorm = lapackf77_dlange("I", &N, &NRHS, h_X, &ldb, work);

        blasf77_dgemm( MagmaNoTransStr, MagmaNoTransStr, &N, &NRHS, &N, 
                       &c_one,     h_A, &lda, 
                                   h_X, &ldb, 
                       &c_neg_one, h_B, &ldb);
        
        Rnorm = lapackf77_dlange("I", &N, &NRHS, h_B, &ldb, work);

        printf( "%5d  %5d   %7.2f (%7.2f)   %8.2e\n",
                (int) N, (int) NRHS, gpu_perf, gpu_time, Rnorm/(Anorm*Xnorm) );
    }

    /* Memory clean up */
    TESTING_FREE( h_A  );
    TESTING_FREE( h_LU );
    TESTING_FREE( h_B  );
    TESTING_FREE( h_X  );
    TESTING_FREE( work );
    TESTING_FREE( ipiv );

    /* Shutdown */
    TESTING_CUDA_FINALIZE();
}