OpenMPI  0.1.1
coll_sm_allreduce.c File Reference
#include "ompi_config.h"
#include "ompi/constants.h"
#include "ompi/communicator/communicator.h"
#include "coll_sm.h"

Functions

int mca_coll_sm_allreduce_intra (void *sbuf, void *rbuf, int count, struct ompi_datatype_t *dtype, struct ompi_op_t *op, struct ompi_communicator_t *comm, mca_coll_base_module_t *module)
 Shared memory allreduce. More...
 

Function Documentation

int mca_coll_sm_allreduce_intra ( void *  sbuf,
void *  rbuf,
int  count,
struct ompi_datatype_t dtype,
struct ompi_op_t op,
struct ompi_communicator_t comm,
mca_coll_base_module_t module 
)

Shared memory allreduce.

For the moment, all we're doing is a reduce to root==0 and then a broadcast. It is possible that we'll do something better someday.

References mca_coll_sm_bcast_intra(), and mca_coll_sm_reduce_intra().