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/**
* Copyright (c) 2021 Mellanox Technologies. All rights reserved.
* Copyright (c) 2022 NVIDIA Corporation. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
*/
#include "coll_ucc_common.h"
static inline
ucc_status_t mca_coll_ucc_reduce_scatter_block_init(const void *sbuf, void *rbuf,
size_t rcount,
struct ompi_datatype_t *dtype,
struct ompi_op_t *op,
mca_coll_ucc_module_t *ucc_module,
ucc_coll_req_h *req,
mca_coll_ucc_req_t *coll_req)
{
ucc_datatype_t ucc_dt;
ucc_reduction_op_t ucc_op;
int comm_size = ompi_comm_size(ucc_module->comm);
if (MPI_IN_PLACE == sbuf) {
/* TODO: UCC defines inplace differently:
data in rbuf of rank R is shifted by R * rcount */
UCC_VERBOSE(5, "inplace reduce_scatter_block is not supported");
return UCC_ERR_NOT_SUPPORTED;
}
ucc_dt = ompi_dtype_to_ucc_dtype(dtype);
ucc_op = ompi_op_to_ucc_op(op);
if (OPAL_UNLIKELY(COLL_UCC_DT_UNSUPPORTED == ucc_dt)) {
UCC_VERBOSE(5, "ompi_datatype is not supported: dtype = %s",
dtype->super.name);
goto fallback;
}
if (OPAL_UNLIKELY(COLL_UCC_OP_UNSUPPORTED == ucc_op)) {
UCC_VERBOSE(5, "ompi_op is not supported: op = %s",
op->o_name);
goto fallback;
}
ucc_coll_args_t coll = {
.mask = 0,
.flags = 0,
.coll_type = UCC_COLL_TYPE_REDUCE_SCATTER,
.src.info = {
.buffer = (void*)sbuf,
.count = ((size_t)rcount) * comm_size,
.datatype = ucc_dt,
.mem_type = UCC_MEMORY_TYPE_UNKNOWN
},
.dst.info = {
.buffer = rbuf,
.count = rcount,
.datatype = ucc_dt,
.mem_type = UCC_MEMORY_TYPE_UNKNOWN
},
.op = ucc_op,
};
COLL_UCC_REQ_INIT(coll_req, req, coll, ucc_module);
return UCC_OK;
fallback:
return UCC_ERR_NOT_SUPPORTED;
}
int mca_coll_ucc_reduce_scatter_block(const void *sbuf, void *rbuf, int rcount,
struct ompi_datatype_t *dtype,
struct ompi_op_t *op,
struct ompi_communicator_t *comm,
mca_coll_base_module_t *module)
{
mca_coll_ucc_module_t *ucc_module = (mca_coll_ucc_module_t*)module;
ucc_coll_req_h req;
UCC_VERBOSE(3, "running ucc reduce scatter block");
COLL_UCC_CHECK(mca_coll_ucc_reduce_scatter_block_init(sbuf, rbuf, rcount,
dtype, op, ucc_module,
&req, NULL));
COLL_UCC_POST_AND_CHECK(req);
COLL_UCC_CHECK(coll_ucc_req_wait(req));
return OMPI_SUCCESS;
fallback:
UCC_VERBOSE(3, "running fallback reduce_scatter_block");
return mca_coll_ucc_call_previous(reduce_scatter_block, ucc_module,
sbuf, rbuf, rcount, dtype, op, comm);
}
int mca_coll_ucc_ireduce_scatter_block(const void *sbuf, void *rbuf, int rcount,
struct ompi_datatype_t *dtype,
struct ompi_op_t *op,
struct ompi_communicator_t *comm,
ompi_request_t** request,
mca_coll_base_module_t *module)
{
mca_coll_ucc_module_t *ucc_module = (mca_coll_ucc_module_t*)module;
ucc_coll_req_h req;
mca_coll_ucc_req_t *coll_req = NULL;
UCC_VERBOSE(3, "running ucc ireduce_scatter_block");
COLL_UCC_GET_REQ(coll_req);
COLL_UCC_CHECK(mca_coll_ucc_reduce_scatter_block_init(sbuf, rbuf, rcount,
dtype, op, ucc_module,
&req, coll_req));
COLL_UCC_POST_AND_CHECK(req);
*request = &coll_req->super;
return OMPI_SUCCESS;
fallback:
UCC_VERBOSE(3, "running fallback ireduce_scatter_block");
if (coll_req) {
mca_coll_ucc_req_free((ompi_request_t **)&coll_req);
}
return mca_coll_ucc_call_previous(ireduce_scatter_block, ucc_module,
sbuf, rbuf, rcount, dtype, op, comm, request);
}
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