Esempio n. 1
0
/**
 * Shared memory reduction.
 *
 * Simply farms out to the associative or non-associative functions.
 */
int mca_coll_sm_reduce_intra(void *sbuf, void* rbuf, int count, 
                             struct ompi_datatype_t *dtype, 
                             struct ompi_op_t *op, 
                             int root, struct ompi_communicator_t *comm)
{
    size_t size;

    /* There are several possibilities:
     *

     * 0. If the datatype is larger than a segment, fall back to basic
     * 1. If the op is user-defined, use the strict order
     * 2. If the op is intrinsic:
     *    a. If the op is float-associative, use the unordered
     *    b. If the op is not float-asociative:
     *       i. if the data is floating point, use the strict order
     *       ii. if the data is not floating point, use the unordered
     */

    ompi_ddt_type_size(dtype, &size);
    if ((int)size > mca_coll_sm_component.sm_control_size) {
        return comm->c_coll_basic_module->coll_reduce(sbuf, rbuf, count,
                                                      dtype, op, root, comm);
    } 
#if WANT_REDUCE_NO_ORDER
    else if (!ompi_op_is_intrinsic(op) ||
        (ompi_op_is_intrinsic(op) && !ompi_op_is_float_assoc(op) &&
         0 != (dtype->flags & DT_FLAG_DATA_FLOAT))) {
        return reduce_inorder(sbuf, rbuf, count, dtype, op, root, comm);
    } else {
        return reduce_no_order(sbuf, rbuf, count, dtype, op, root, comm);
    }
#else
    else {
        return reduce_inorder(sbuf, rbuf, count, dtype, op, root, comm);
Esempio n. 2
0
/**
 * Shared memory reduction.
 *
 * Simply farms out to the associative or non-associative functions.
 */
int mca_coll_sm_reduce_intra(void *sbuf, void* rbuf, int count, 
                             struct ompi_datatype_t *dtype, 
                             struct ompi_op_t *op, 
                             int root, struct ompi_communicator_t *comm,
                             mca_coll_base_module_t *module)
{
    size_t size;
    mca_coll_sm_module_t *sm_module = (mca_coll_sm_module_t*) module;

    /* There are several possibilities:
     *
     * 0. If the datatype is larger than a segment, fall back to
     *    underlying module
     * 1. If the op is user-defined, use the strict order
     * 2. If the op is intrinsic:
     *    a. If the op is float-associative, use the unordered
     *    b. If the op is not float-associative:
     *       i. if the data is floating point, use the strict order
     *       ii. if the data is not floating point, use the unordered
     */

    ompi_ddt_type_size(dtype, &size);
    if ((int)size > mca_coll_sm_component.sm_control_size) {
        return sm_module->previous_reduce(sbuf, rbuf, count,
                                          dtype, op, root, comm,
                                          sm_module->previous_reduce_module);
    } 
#if WANT_REDUCE_NO_ORDER
    else {
        /* Lazily enable the module the first time we invoke a
           collective on it */
        if (!sm_module->enabled) {
            if (OMPI_SUCCESS != 
                (ret = ompi_coll_sm_lazy_enable(module, comm))) {
                return ret;
            }
        }
        
        if (!ompi_op_is_intrinsic(op) ||
            (ompi_op_is_intrinsic(op) && !ompi_op_is_float_assoc(op) &&
             0 != (dtype->flags & OMPI_DATATYPE_FLAG_DATA_FLOAT))) {
            return reduce_inorder(sbuf, rbuf, count, dtype, op, 
                                  root, comm, module);
        } else {
            return reduce_no_order(sbuf, rbuf, count, dtype, op, 
                                   root, comm, module);
        }
    }
#else
    else {
        /* Lazily enable the module the first time we invoke a
           collective on it */
        if (!sm_module->enabled) {