codelet_zgemm.c

/**
 *
 * @file starpu/codelet_zgemm.c
 *
 * @copyright 2009-2014 The University of Tennessee and The University of
 *                      Tennessee Research Foundation. All rights reserved.
 * @copyright 2012-2022 Bordeaux INP, CNRS (LaBRI UMR 5800), Inria,
 *                      Univ. Bordeaux. All rights reserved.
 *
 ***
 *
 * @brief Chameleon zgemm StarPU codelet
 *
 * @version 1.2.0
 * @author Hatem Ltaief
 * @author Jakub Kurzak
 * @author Mathieu Faverge
 * @author Emmanuel Agullo
 * @author Cedric Castagnede
 * @author Lucas Barros de Assis
 * @author Florent Pruvost
 * @author Gwenole Lucas
 * @date 2022-02-22
 * @precisions normal z -> c d s
 *
 */
#include "chameleon_starpu.h"
#include "runtime_codelet_z.h"

struct cl_zgemm_args_s {
    cham_trans_t transA;
    cham_trans_t transB;
    int m;
    int n;
    int k;
    CHAMELEON_Complex64_t alpha;
    CHAM_tile_t *tileA;
    CHAM_tile_t *tileB;
    CHAMELEON_Complex64_t beta;
    CHAM_tile_t *tileC;
};

#if !defined(CHAMELEON_SIMULATION)
static void
cl_zgemm_cpu_func( void *descr[], void *cl_arg )
{
    struct cl_zgemm_args_s *clargs = (struct cl_zgemm_args_s *)cl_arg;
    CHAM_tile_t *tileA;
    CHAM_tile_t *tileB;
    CHAM_tile_t *tileC;

    tileA = cti_interface_get(descr[0]);
    tileB = cti_interface_get(descr[1]);
    tileC = cti_interface_get(descr[2]);

    TCORE_zgemm( clargs->transA, clargs->transB,
                 clargs->m, clargs->n, clargs->k,
                 clargs->alpha, tileA, tileB,
                 clargs->beta,  tileC );
}

#ifdef CHAMELEON_USE_CUDA
static void
cl_zgemm_cuda_func( void *descr[], void *cl_arg )
{
    struct cl_zgemm_args_s *clargs = (struct cl_zgemm_args_s *)cl_arg;
    cublasHandle_t          handle = starpu_cublas_get_local_handle();
    CHAM_tile_t *tileA;
    CHAM_tile_t *tileB;
    CHAM_tile_t *tileC;

    tileA = cti_interface_get(descr[0]);
    tileB = cti_interface_get(descr[1]);
    tileC = cti_interface_get(descr[2]);

    assert( tileA->format & CHAMELEON_TILE_FULLRANK );
    assert( tileB->format & CHAMELEON_TILE_FULLRANK );
    assert( tileC->format & CHAMELEON_TILE_FULLRANK );

    CUDA_zgemm(
        clargs->transA, clargs->transB,
        clargs->m, clargs->n, clargs->k,
        (cuDoubleComplex*)&(clargs->alpha),
        tileA->mat, tileA->ld,
        tileB->mat, tileB->ld,
        (cuDoubleComplex*)&(clargs->beta),
        tileC->mat, tileC->ld,
        handle );

    return;
}
#endif /* defined(CHAMELEON_USE_CUDA) */
#endif /* !defined(CHAMELEON_SIMULATION) */

/*
 * Codelet definition
 */
CODELETS( zgemm, cl_zgemm_cpu_func, cl_zgemm_cuda_func, STARPU_CUDA_ASYNC )

void INSERT_TASK_zgemm( const RUNTIME_option_t *options,
                        cham_trans_t transA, cham_trans_t transB,
                        int m, int n, int k, int nb,
                        CHAMELEON_Complex64_t alpha, const CHAM_desc_t *A, int Am, int An,
                                                     const CHAM_desc_t *B, int Bm, int Bn,
                        CHAMELEON_Complex64_t beta,  const CHAM_desc_t *C, int Cm, int Cn )
{
    if ( alpha == 0. ) {
        return INSERT_TASK_zlascal( options, ChamUpperLower, m, n, nb,
                                    beta, C, Cm, Cn );
    }

    struct cl_zgemm_args_s  *clargs = NULL;
    void (*callback)(void*);
    int                      accessC;
    int                      exec = 0;
    char                    *cl_name = "zgemm";

    /* Handle cache */
    CHAMELEON_BEGIN_ACCESS_DECLARATION;
    CHAMELEON_ACCESS_R(A, Am, An);
    CHAMELEON_ACCESS_R(B, Bm, Bn);
    CHAMELEON_ACCESS_RW(C, Cm, Cn);
    exec = __chameleon_need_exec;
    CHAMELEON_END_ACCESS_DECLARATION;

    if ( exec ) {
        clargs = malloc( sizeof( struct cl_zgemm_args_s ) );
        clargs->transA = transA;
        clargs->transB = transB;
        clargs->m      = m;
        clargs->n      = n;
        clargs->k      = k;
        clargs->alpha  = alpha;
        clargs->tileA  = A->get_blktile( A, Am, An );
        clargs->tileB  = B->get_blktile( B, Bm, Bn );
        clargs->beta   = beta;
        clargs->tileC  = C->get_blktile( C, Cm, Cn );
    }

    /* Callback for profiling information */
    callback = options->profiling ? cl_zgemm_callback : NULL;

    /* Reduce the C access if needed */
    accessC = ( beta == 0. ) ? STARPU_W : STARPU_RW;

#if defined(CHAMELEON_KERNELS_TRACE)
    {
        char *cl_fullname;
        chameleon_asprintf( &cl_fullname, "%s( %s, %s, %s )", cl_name, clargs->tileA->name, clargs->tileB->name, clargs->tileC->name );
        cl_name = cl_fullname;
    }
#endif

    /* Insert the task */
    rt_starpu_insert_task(
        &cl_zgemm,
        /* Task codelet arguments */
        STARPU_CL_ARGS, clargs, sizeof(struct cl_zgemm_args_s),

        /* Task handles */
        STARPU_R, RTBLKADDR(A, CHAMELEON_Complex64_t, Am, An),
        STARPU_R, RTBLKADDR(B, CHAMELEON_Complex64_t, Bm, Bn),
        accessC,  RTBLKADDR(C, CHAMELEON_Complex64_t, Cm, Cn),

        /* Common task arguments */
        STARPU_PRIORITY,          options->priority,
        STARPU_CALLBACK,          callback,
        STARPU_EXECUTE_ON_WORKER, options->workerid,
#if defined(CHAMELEON_CODELETS_HAVE_NAME)
        STARPU_NAME,              cl_name,
#endif

        0 );

    (void)nb;
}