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/**
Copyright (c) 2011 Mellanox Technologies. All rights reserved.
Copyright (c) 2017 IBM Corporation. All rights reserved.
$COPYRIGHT$
Additional copyrights may follow
$HEADER$
*/
#include "ompi_config.h"
#include "ompi/constants.h"
#include "scoll_mpi.h"
#include "scoll_mpi_dtypes.h"
#define INCOMPATIBLE_SHMEM_OMPI_COLL_APIS 1
int mca_scoll_mpi_barrier(struct oshmem_group_t *group, long *pSync, int alg)
{
mca_scoll_mpi_module_t *mpi_module;
int rc;
MPI_COLL_VERBOSE(20,"RUNNING MPI BARRIER");
mpi_module = (mca_scoll_mpi_module_t *) group->g_scoll.scoll_barrier_module;
rc = mpi_module->comm->c_coll->coll_barrier(mpi_module->comm, mpi_module->comm->c_coll->coll_barrier_module);
if (OMPI_SUCCESS != rc){
MPI_COLL_VERBOSE(20,"RUNNING FALLBACK BARRIER");
PREVIOUS_SCOLL_FN(mpi_module, barrier, group,
pSync,
SCOLL_DEFAULT_ALG);
}
return rc;
}
int mca_scoll_mpi_broadcast(struct oshmem_group_t *group,
int PE_root,
void *target,
const void *source,
size_t nlong,
long *pSync,
bool nlong_type,
int alg)
{
mca_scoll_mpi_module_t *mpi_module;
ompi_datatype_t* dtype;
int rc;
void* buf;
int root;
MPI_COLL_VERBOSE(20,"RUNNING MPI BCAST");
mpi_module = (mca_scoll_mpi_module_t *) group->g_scoll.scoll_broadcast_module;
if (group->my_pe == PE_root) {
buf = (void *) source;
} else {
buf = target;
}
dtype = &ompi_mpi_char.dt;
root = oshmem_proc_group_find_id(group, PE_root);
/* Open SHMEM specification has the following constrains (page 85):
* "If using C/C++, nelems must be of type integer. If you are using Fortran, it must be a
* default integer value". And also fortran signature says "INTEGER".
* Since ompi coll components doesn't support size_t at the moment,
* and considering this contradiction, we cast size_t to int here
* in case if the value is less than INT_MAX and fallback to previous module otherwise. */
if (OPAL_UNLIKELY(!nlong_type || (INT_MAX < nlong))) {
#ifdef INCOMPATIBLE_SHMEM_OMPI_COLL_APIS
MPI_COLL_VERBOSE(20,"RUNNING FALLBACK BCAST");
PREVIOUS_SCOLL_FN(mpi_module, broadcast, group,
PE_root,
target,
source,
nlong,
pSync,
nlong_type,
SCOLL_DEFAULT_ALG);
return rc;
#else
MPI_COLL_ERROR(20, "variable broadcast length, or exceeds INT_MAX: %zu", nlong);
return OSHMEM_ERR_NOT_SUPPORTED;
#endif
}
/* Do nothing on zero-length request */
if (OPAL_UNLIKELY(!nlong)) {
return OSHMEM_SUCCESS;
}
rc = mpi_module->comm->c_coll->coll_bcast(buf, nlong, dtype, root, mpi_module->comm, mpi_module->comm->c_coll->coll_bcast_module);
if (OMPI_SUCCESS != rc){
MPI_COLL_VERBOSE(20,"RUNNING FALLBACK BCAST");
PREVIOUS_SCOLL_FN(mpi_module, broadcast, group,
PE_root,
target,
source,
nlong,
pSync,
nlong_type,
SCOLL_DEFAULT_ALG);
}
return rc;
}
int mca_scoll_mpi_collect(struct oshmem_group_t *group,
void *target,
const void *source,
size_t nlong,
long *pSync,
bool nlong_type,
int alg)
{
ompi_datatype_t* stype = &ompi_mpi_char.dt;
ompi_datatype_t* rtype = &ompi_mpi_char.dt;
mca_scoll_mpi_module_t *mpi_module;
int rc;
int len;
int i;
void *sbuf, *rbuf;
int *disps, *recvcounts;
MPI_COLL_VERBOSE(20,"RUNNING MPI ALLGATHER");
mpi_module = (mca_scoll_mpi_module_t *) group->g_scoll.scoll_collect_module;
if (nlong_type == true) {
/* Do nothing on zero-length request */
if (OPAL_UNLIKELY(!nlong)) {
return OSHMEM_SUCCESS;
}
sbuf = (void *) source;
rbuf = target;
/* Open SHMEM specification has the following constrains (page 85):
* "If using C/C++, nelems must be of type integer. If you are using Fortran, it must be a
* default integer value". And also fortran signature says "INTEGER".
* Since ompi coll components doesn't support size_t at the moment,
* and considering this contradiction, we cast size_t to int here
* in case if the value is less than INT_MAX and fallback to previous module otherwise. */
#ifdef INCOMPATIBLE_SHMEM_OMPI_COLL_APIS
if (INT_MAX < nlong) {
MPI_COLL_VERBOSE(20,"RUNNING FALLBACK COLLECT");
PREVIOUS_SCOLL_FN(mpi_module, collect, group,
target,
source,
nlong,
pSync,
nlong_type,
SCOLL_DEFAULT_ALG);
return rc;
}
rc = mpi_module->comm->c_coll->coll_allgather(sbuf, (int)nlong, stype, rbuf, (int)nlong, rtype, mpi_module->comm, mpi_module->comm->c_coll->coll_allgather_module);
#else
rc = mpi_module->comm->c_coll->coll_allgather(sbuf, nlong, stype, rbuf, nlong, rtype, mpi_module->comm, mpi_module->comm->c_coll->coll_allgather_module);
#endif
if (OMPI_SUCCESS != rc){
MPI_COLL_VERBOSE(20,"RUNNING FALLBACK FCOLLECT");
PREVIOUS_SCOLL_FN(mpi_module, collect, group,
target,
source,
nlong,
pSync,
nlong_type,
SCOLL_DEFAULT_ALG);
}
} else {
if (INT_MAX < nlong) {
MPI_COLL_VERBOSE(20,"RUNNING FALLBACK COLLECT");
PREVIOUS_SCOLL_FN(mpi_module, collect, group,
target,
source,
nlong,
pSync,
nlong_type,
SCOLL_DEFAULT_ALG);
return rc;
}
len = nlong;
disps = malloc(group->proc_count * sizeof(*disps));
if (disps == NULL) {
rc = OSHMEM_ERR_OUT_OF_RESOURCE;
goto complete;
}
recvcounts = malloc(group->proc_count * sizeof(*recvcounts));
if (recvcounts == NULL) {
rc = OSHMEM_ERR_OUT_OF_RESOURCE;
goto failed_mem;
}
rc = mpi_module->comm->c_coll->coll_allgather(&len, sizeof(len), stype, recvcounts,
sizeof(len), rtype, mpi_module->comm,
mpi_module->comm->c_coll->coll_allgather_module);
if (rc != OSHMEM_SUCCESS) {
goto failed_allgather;
}
disps[0] = 0;
for (i = 1; i < group->proc_count; i++) {
disps[i] = disps[i - 1] + recvcounts[i - 1];
}
rc = mpi_module->comm->c_coll->coll_allgatherv(source, nlong, stype, target, recvcounts,
disps, rtype, mpi_module->comm,
mpi_module->comm->c_coll->coll_allgatherv_module);
failed_allgather:
free(recvcounts);
failed_mem:
free(disps);
}
complete:
return rc;
}
int mca_scoll_mpi_reduce(struct oshmem_group_t *group,
struct oshmem_op_t *op,
void *target,
const void *source,
size_t nlong,
long *pSync,
void *pWrk,
int alg)
{
mca_scoll_mpi_module_t *mpi_module;
struct ompi_datatype_t* dtype;
struct ompi_op_t *h_op;
int rc;
size_t count;
MPI_COLL_VERBOSE(20,"RUNNING MPI REDUCE");
void *sbuf, *rbuf;
mpi_module = (mca_scoll_mpi_module_t *) group->g_scoll.scoll_reduce_module;
dtype = shmem_dtype_to_ompi_dtype(op);
h_op = shmem_op_to_ompi_op(op->op);
count = nlong/op->dt_size;
rbuf = target;
sbuf = (source == target) ? MPI_IN_PLACE : (void*)source;
/* Do nothing on zero-length request */
if (OPAL_UNLIKELY(!nlong)) {
return OSHMEM_SUCCESS;
}
/* Open SHMEM specification has the following constrains (page 85):
* "If using C/C++, nelems must be of type integer. If you are using Fortran, it must be a
* default integer value". And also fortran signature says "INTEGER".
* Since ompi coll components doesn't support size_t at the moment,
* and considering this contradiction, we cast size_t to int here
* in case if the value is less than INT_MAX and fallback to previous module otherwise. */
#ifdef INCOMPATIBLE_SHMEM_OMPI_COLL_APIS
if (INT_MAX < count) {
MPI_COLL_VERBOSE(20,"RUNNING FALLBACK REDUCE");
PREVIOUS_SCOLL_FN(mpi_module, reduce, group,
op,
target,
source,
nlong,
pSync,
pWrk,
SCOLL_DEFAULT_ALG);
return rc;
}
rc = mpi_module->comm->c_coll->coll_allreduce(sbuf, rbuf, (int)count, dtype, h_op, mpi_module->comm, mpi_module->comm->c_coll->coll_allreduce_module);
#else
rc = mpi_module->comm->c_coll->coll_allreduce(sbuf, rbuf, count, dtype, h_op, mpi_module->comm, mpi_module->comm->c_coll->coll_allreduce_module);
#endif
if (OMPI_SUCCESS != rc){
MPI_COLL_VERBOSE(20,"RUNNING FALLBACK REDUCE");
PREVIOUS_SCOLL_FN(mpi_module, reduce, group,
op,
target,
source,
nlong,
pSync,
pWrk,
SCOLL_DEFAULT_ALG);
}
return rc;
}
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