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/**
Copyright (c) 2021 Mellanox Technologies. All rights reserved.
$COPYRIGHT$
Additional copyrights may follow
$HEADER$
*/
#include "scoll_ucc.h"
#include "scoll_ucc_dtypes.h"
#include "scoll_ucc_common.h"
#include <ucc/api/ucc.h>
static inline ucc_status_t mca_scoll_ucc_alltoall_init(const void *sbuf, void *rbuf,
int count, size_t elem_size,
mca_scoll_ucc_module_t *ucc_module,
ucc_coll_req_h *req)
{
ucc_datatype_t dt;
if (elem_size == 8) {
dt = UCC_DT_INT64;
} else if (elem_size == 4) {
dt = UCC_DT_INT32;
} else {
dt = UCC_DT_INT8;
}
ucc_coll_args_t coll = {
.mask = UCC_COLL_ARGS_FIELD_FLAGS | UCC_COLL_ARGS_FIELD_GLOBAL_WORK_BUFFER,
.coll_type = UCC_COLL_TYPE_ALLTOALL,
.src.info = {
.buffer = (void *)sbuf,
.count = count * ucc_module->group->proc_count,
.datatype = dt,
.mem_type = UCC_MEMORY_TYPE_UNKNOWN
},
.dst.info = {
.buffer = rbuf,
.count = count * ucc_module->group->proc_count,
.datatype = dt,
.mem_type = UCC_MEMORY_TYPE_UNKNOWN
},
.flags = UCC_COLL_ARGS_FLAG_MEM_MAPPED_BUFFERS,
.global_work_buffer = ucc_module->pSync,
};
if (NULL == mca_scoll_ucc_component.ucc_context) {
if (OSHMEM_ERROR == mca_scoll_ucc_init_ctx(ucc_module->group)) {
return OSHMEM_ERROR;
}
}
if (NULL == ucc_module->ucc_team) {
if (OSHMEM_ERROR == mca_scoll_ucc_team_create(ucc_module, ucc_module->group)) {
return OSHMEM_ERROR;
}
}
SCOLL_UCC_REQ_INIT(req, coll, ucc_module);
return UCC_OK;
fallback:
return UCC_ERR_NOT_SUPPORTED;
}
int mca_scoll_ucc_alltoall(struct oshmem_group_t *group,
void *target,
const void *source,
ptrdiff_t dst, ptrdiff_t sst,
size_t nelems,
size_t element_size,
long *pSync,
int alg)
{
mca_scoll_ucc_module_t *ucc_module;
size_t count;
ucc_coll_req_h req;
int rc;
UCC_VERBOSE(3, "running ucc alltoall");
ucc_module = (mca_scoll_ucc_module_t *) group->g_scoll.scoll_alltoall_module;
count = nelems;
if ((sst != 1) || (dst != 1)) {
goto fallback;
}
/* Do nothing on zero-length request */
if (OPAL_UNLIKELY(!nelems)) {
return OSHMEM_SUCCESS;
}
SCOLL_UCC_CHECK(mca_scoll_ucc_alltoall_init(source, target, count,
element_size, ucc_module, &req));
SCOLL_UCC_CHECK(ucc_collective_post(req));
SCOLL_UCC_CHECK(scoll_ucc_req_wait(req));
return OSHMEM_SUCCESS;
fallback:
UCC_VERBOSE(3, "running fallback alltoall");
PREVIOUS_SCOLL_FN(ucc_module, alltoall, group, target, source,
dst, sst, nelems, element_size, pSync, alg);
return rc;
}
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