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COLL/UCC: add persistent collective calls for UCC #13374

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2dec57d
COLL/UCC: renaming <coll>_init to avoid naming conflicts
Aug 21, 2025
9305110
COLL/UCC: add persistent collective calls
Aug 21, 2025
4171fdb
COLL/UCC: add <coll>_init to -mca coll_ucc_cts parser
Aug 21, 2025
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103 changes: 103 additions & 0 deletions ompi/mca/coll/ucc/coll_ucc.h
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
/**
Copyright (c) 2021 Mellanox Technologies. All rights reserved.
Copyright (c) 2022 NVIDIA Corporation. All rights reserved.
Copyright (c) 2025 Fujitsu Limited. All rights reserved.
$COPYRIGHT$

Additional copyrights may follow
Expand Down Expand Up @@ -61,6 +62,7 @@ struct mca_coll_ucc_component_t {
ucc_lib_attr_t ucc_lib_attr;
ucc_coll_type_t cts_requested;
ucc_coll_type_t nb_cts_requested;
ucc_coll_type_t pc_cts_requested;
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does pc stand for persistent collective? maybe ps_cts_requested is better

ucc_context_h ucc_context;
opal_free_list_t requests;
};
Expand Down Expand Up @@ -132,6 +134,34 @@ struct mca_coll_ucc_module_t {
mca_coll_base_module_t* previous_scatter_module;
mca_coll_base_module_iscatter_fn_t previous_iscatter;
mca_coll_base_module_t* previous_iscatter_module;
mca_coll_base_module_allreduce_init_fn_t previous_allreduce_init;
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please keep alignment

mca_coll_base_module_t *previous_allreduce_init_module;
mca_coll_base_module_reduce_init_fn_t previous_reduce_init;
mca_coll_base_module_t *previous_reduce_init_module;
mca_coll_base_module_barrier_init_fn_t previous_barrier_init;
mca_coll_base_module_t *previous_barrier_init_module;
mca_coll_base_module_bcast_init_fn_t previous_bcast_init;
mca_coll_base_module_t *previous_bcast_init_module;
mca_coll_base_module_alltoall_init_fn_t previous_alltoall_init;
mca_coll_base_module_t *previous_alltoall_init_module;
mca_coll_base_module_alltoallv_init_fn_t previous_alltoallv_init;
mca_coll_base_module_t *previous_alltoallv_init_module;
mca_coll_base_module_allgather_init_fn_t previous_allgather_init;
mca_coll_base_module_t *previous_allgather_init_module;
mca_coll_base_module_allgatherv_init_fn_t previous_allgatherv_init;
mca_coll_base_module_t *previous_allgatherv_init_module;
mca_coll_base_module_gather_init_fn_t previous_gather_init;
mca_coll_base_module_t *previous_gather_init_module;
mca_coll_base_module_gatherv_init_fn_t previous_gatherv_init;
mca_coll_base_module_t *previous_gatherv_init_module;
mca_coll_base_module_reduce_scatter_block_init_fn_t previous_reduce_scatter_block_init;
mca_coll_base_module_t *previous_reduce_scatter_block_init_module;
mca_coll_base_module_reduce_scatter_init_fn_t previous_reduce_scatter_init;
mca_coll_base_module_t *previous_reduce_scatter_init_module;
mca_coll_base_module_scatterv_init_fn_t previous_scatterv_init;
mca_coll_base_module_t *previous_scatterv_init_module;
mca_coll_base_module_scatter_init_fn_t previous_scatter_init;
mca_coll_base_module_t *previous_scatter_init_module;
};
typedef struct mca_coll_ucc_module_t mca_coll_ucc_module_t;
OBJ_CLASS_DECLARATION(mca_coll_ucc_module_t);
Expand Down Expand Up @@ -305,5 +335,78 @@ int mca_coll_ucc_iscatter(const void *sbuf, size_t scount,
ompi_request_t** request,
mca_coll_base_module_t *module);

int mca_coll_ucc_allreduce_init(const void *sbuf, void *rbuf, size_t count,
struct ompi_datatype_t *dtype, struct ompi_op_t *op,
struct ompi_communicator_t *comm, struct ompi_info_t *info,
ompi_request_t **request, mca_coll_base_module_t *module);

int mca_coll_ucc_reduce_init(const void *sbuf, void *rbuf, size_t count,
struct ompi_datatype_t *dtype, struct ompi_op_t *op, int root,
struct ompi_communicator_t *comm, struct ompi_info_t *info,
ompi_request_t **request, mca_coll_base_module_t *module);

int mca_coll_ucc_barrier_init(struct ompi_communicator_t *comm, struct ompi_info_t *info,
ompi_request_t **request, mca_coll_base_module_t *module);

int mca_coll_ucc_bcast_init(void *buff, size_t count, struct ompi_datatype_t *datatype, int root,
struct ompi_communicator_t *comm, struct ompi_info_t *info,
ompi_request_t **request, mca_coll_base_module_t *module);

int mca_coll_ucc_alltoall_init(const void *sbuf, size_t scount, struct ompi_datatype_t *sdtype,
void *rbuf, size_t rcount, struct ompi_datatype_t *rdtype,
struct ompi_communicator_t *comm, struct ompi_info_t *info,
ompi_request_t **request, mca_coll_base_module_t *module);

int mca_coll_ucc_alltoallv_init(const void *sbuf, ompi_count_array_t scounts,
ompi_disp_array_t sdisps, struct ompi_datatype_t *sdtype,
void *rbuf, ompi_count_array_t rcounts, ompi_disp_array_t rdisps,
struct ompi_datatype_t *rdtype, struct ompi_communicator_t *comm,
struct ompi_info_t *info, ompi_request_t **request,
mca_coll_base_module_t *module);

int mca_coll_ucc_allgather_init(const void *sbuf, size_t scount, struct ompi_datatype_t *sdtype,
void *rbuf, size_t rcount, struct ompi_datatype_t *rdtype,
struct ompi_communicator_t *comm, struct ompi_info_t *info,
ompi_request_t **request, mca_coll_base_module_t *module);

int mca_coll_ucc_allgatherv_init(const void *sbuf, size_t scount, struct ompi_datatype_t *sdtype,
void *rbuf, ompi_count_array_t rcounts, ompi_disp_array_t disps,
struct ompi_datatype_t *rdtype, struct ompi_communicator_t *comm,
struct ompi_info_t *info, ompi_request_t **request,
mca_coll_base_module_t *module);

int mca_coll_ucc_gather_init(const void *sbuf, size_t scount, struct ompi_datatype_t *sdtype,
void *rbuf, size_t rcount, struct ompi_datatype_t *rdtype, int root,
struct ompi_communicator_t *comm, struct ompi_info_t *info,
ompi_request_t **request, mca_coll_base_module_t *module);

int mca_coll_ucc_gatherv_init(const void *sbuf, size_t scount, struct ompi_datatype_t *sdtype,
void *rbuf, ompi_count_array_t rcounts, ompi_disp_array_t disps,
struct ompi_datatype_t *rdtype, int root,
struct ompi_communicator_t *comm, struct ompi_info_t *info,
ompi_request_t **request, mca_coll_base_module_t *module);

int 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,
struct ompi_communicator_t *comm,
struct ompi_info_t *info, ompi_request_t **request,
mca_coll_base_module_t *module);

int mca_coll_ucc_reduce_scatter_init(const void *sbuf, void *rbuf, ompi_count_array_t rcounts,
struct ompi_datatype_t *dtype, struct ompi_op_t *op,
struct ompi_communicator_t *comm, struct ompi_info_t *info,
ompi_request_t **request, mca_coll_base_module_t *module);

int mca_coll_ucc_scatterv_init(const void *sbuf, ompi_count_array_t scounts,
ompi_disp_array_t disps, struct ompi_datatype_t *sdtype, void *rbuf,
size_t rcount, struct ompi_datatype_t *rdtype, int root,
struct ompi_communicator_t *comm, struct ompi_info_t *info,
ompi_request_t **request, mca_coll_base_module_t *module);

int mca_coll_ucc_scatter_init(const void *sbuf, size_t scount, struct ompi_datatype_t *sdtype,
void *rbuf, size_t rcount, struct ompi_datatype_t *rdtype, int root,
struct ompi_communicator_t *comm, struct ompi_info_t *info,
ompi_request_t **request, mca_coll_base_module_t *module);

END_C_DECLS
#endif
46 changes: 37 additions & 9 deletions ompi/mca/coll/ucc/coll_ucc_allgather.c
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@

/**
* Copyright (c) 2021 Mellanox Technologies. All rights reserved.
* Copyright (c) 2025 Fujitsu Limited. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
Expand All @@ -9,11 +10,11 @@

#include "coll_ucc_common.h"

static inline ucc_status_t mca_coll_ucc_allgather_init(const void *sbuf, size_t scount, struct ompi_datatype_t *sdtype,
void* rbuf, size_t rcount, struct ompi_datatype_t *rdtype,
mca_coll_ucc_module_t *ucc_module,
ucc_coll_req_h *req,
mca_coll_ucc_req_t *coll_req)
static inline ucc_status_t
mca_coll_ucc_allgather_iniz(const void *sbuf, size_t scount, struct ompi_datatype_t *sdtype,
void *rbuf, size_t rcount, struct ompi_datatype_t *rdtype,
bool persistent, mca_coll_ucc_module_t *ucc_module, ucc_coll_req_h *req,
mca_coll_ucc_req_t *coll_req)
{
ucc_datatype_t ucc_sdt = UCC_DT_INT8, ucc_rdt = UCC_DT_INT8;
bool is_inplace = (MPI_IN_PLACE == sbuf);
Expand Down Expand Up @@ -59,6 +60,10 @@ static inline ucc_status_t mca_coll_ucc_allgather_init(const void *sbuf, size_t
coll.mask = UCC_COLL_ARGS_FIELD_FLAGS;
coll.flags = UCC_COLL_ARGS_FLAG_IN_PLACE;
}
if (true == persistent) {
coll.mask |= UCC_COLL_ARGS_FIELD_FLAGS;
coll.flags |= UCC_COLL_ARGS_FLAG_PERSISTENT;
}
COLL_UCC_REQ_INIT(coll_req, req, coll, ucc_module);
return UCC_OK;
fallback:
Expand All @@ -74,8 +79,7 @@ int mca_coll_ucc_allgather(const void *sbuf, size_t scount, struct ompi_datatype
ucc_coll_req_h req;

UCC_VERBOSE(3, "running ucc allgather");
COLL_UCC_CHECK(mca_coll_ucc_allgather_init(sbuf, scount, sdtype,
rbuf, rcount, rdtype,
COLL_UCC_CHECK(mca_coll_ucc_allgather_iniz(sbuf, scount, sdtype, rbuf, rcount, rdtype, false,
ucc_module, &req, NULL));
COLL_UCC_POST_AND_CHECK(req);
COLL_UCC_CHECK(coll_ucc_req_wait(req));
Expand All @@ -98,8 +102,7 @@ int mca_coll_ucc_iallgather(const void *sbuf, size_t scount, struct ompi_datatyp

UCC_VERBOSE(3, "running ucc iallgather");
COLL_UCC_GET_REQ(coll_req);
COLL_UCC_CHECK(mca_coll_ucc_allgather_init(sbuf, scount, sdtype,
rbuf, rcount, rdtype,
COLL_UCC_CHECK(mca_coll_ucc_allgather_iniz(sbuf, scount, sdtype, rbuf, rcount, rdtype, false,
ucc_module, &req, coll_req));
COLL_UCC_POST_AND_CHECK(req);
*request = &coll_req->super;
Expand All @@ -112,3 +115,28 @@ int mca_coll_ucc_iallgather(const void *sbuf, size_t scount, struct ompi_datatyp
return ucc_module->previous_iallgather(sbuf, scount, sdtype, rbuf, rcount, rdtype,
comm, request, ucc_module->previous_iallgather_module);
}

int mca_coll_ucc_allgather_init(const void *sbuf, size_t scount, struct ompi_datatype_t *sdtype,
void *rbuf, size_t rcount, struct ompi_datatype_t *rdtype,
struct ompi_communicator_t *comm, struct ompi_info_t *info,
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;

COLL_UCC_GET_REQ_PC(coll_req);
UCC_VERBOSE(3, "allgather_init init %p", coll_req);
COLL_UCC_CHECK(mca_coll_ucc_allgather_iniz(sbuf, scount, sdtype, rbuf, rcount, rdtype, true,
ucc_module, &req, coll_req));
*request = &coll_req->super;
return OMPI_SUCCESS;
fallback:
UCC_VERBOSE(3, "running fallback allgather_init");
if (coll_req) {
mca_coll_ucc_req_free((ompi_request_t **) &coll_req);
}
return ucc_module->previous_allgather_init(sbuf, scount, sdtype, rbuf, rcount, rdtype, comm,
info, request,
ucc_module->previous_allgather_init_module);
}
54 changes: 41 additions & 13 deletions ompi/mca/coll/ucc/coll_ucc_allgatherv.c
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@

/**
* Copyright (c) 2021 Mellanox Technologies. All rights reserved.
* Copyright (c) 2025 Fujitsu Limited. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
Expand All @@ -9,13 +10,12 @@

#include "coll_ucc_common.h"

static inline ucc_status_t mca_coll_ucc_allgatherv_init(const void *sbuf, size_t scount,
struct ompi_datatype_t *sdtype,
void* rbuf, ompi_count_array_t rcounts, ompi_disp_array_t rdisps,
struct ompi_datatype_t *rdtype,
mca_coll_ucc_module_t *ucc_module,
ucc_coll_req_h *req,
mca_coll_ucc_req_t *coll_req)
static inline ucc_status_t
mca_coll_ucc_allgatherv_iniz(const void *sbuf, size_t scount, struct ompi_datatype_t *sdtype,
void *rbuf, ompi_count_array_t rcounts, ompi_disp_array_t rdisps,
struct ompi_datatype_t *rdtype, bool persistent,
mca_coll_ucc_module_t *ucc_module, ucc_coll_req_h *req,
mca_coll_ucc_req_t *coll_req)
{
ucc_datatype_t ucc_sdt = UCC_DT_INT8, ucc_rdt = UCC_DT_INT8;
bool is_inplace = (MPI_IN_PLACE == sbuf);
Expand Down Expand Up @@ -57,6 +57,10 @@ static inline ucc_status_t mca_coll_ucc_allgatherv_init(const void *sbuf, size_t
}
};

if (true == persistent) {
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maybe make it part of line 37 where other flags are set?

coll.mask |= UCC_COLL_ARGS_FIELD_FLAGS;
coll.flags |= UCC_COLL_ARGS_FLAG_PERSISTENT;
}
COLL_UCC_REQ_INIT(coll_req, req, coll, ucc_module);
return UCC_OK;
fallback:
Expand All @@ -75,9 +79,8 @@ int mca_coll_ucc_allgatherv(const void *sbuf, size_t scount,

UCC_VERBOSE(3, "running ucc allgatherv");

COLL_UCC_CHECK(mca_coll_ucc_allgatherv_init(sbuf, scount, sdtype,
rbuf, rcounts, rdisps, rdtype,
ucc_module, &req, NULL));
COLL_UCC_CHECK(mca_coll_ucc_allgatherv_iniz(sbuf, scount, sdtype, rbuf, rcounts, rdisps, rdtype,
false, ucc_module, &req, NULL));
COLL_UCC_POST_AND_CHECK(req);
COLL_UCC_CHECK(coll_ucc_req_wait(req));
return OMPI_SUCCESS;
Expand All @@ -102,9 +105,8 @@ int mca_coll_ucc_iallgatherv(const void *sbuf, size_t scount,

UCC_VERBOSE(3, "running ucc iallgatherv");
COLL_UCC_GET_REQ(coll_req);
COLL_UCC_CHECK(mca_coll_ucc_allgatherv_init(sbuf, scount, sdtype,
rbuf, rcounts, rdisps, rdtype,
ucc_module, &req, coll_req));
COLL_UCC_CHECK(mca_coll_ucc_allgatherv_iniz(sbuf, scount, sdtype, rbuf, rcounts, rdisps, rdtype,
false, ucc_module, &req, coll_req));
COLL_UCC_POST_AND_CHECK(req);
*request = &coll_req->super;
return OMPI_SUCCESS;
Expand All @@ -117,3 +119,29 @@ int mca_coll_ucc_iallgatherv(const void *sbuf, size_t scount,
rbuf, rcounts, rdisps, rdtype,
comm, request, ucc_module->previous_iallgatherv_module);
}

int mca_coll_ucc_allgatherv_init(const void *sbuf, size_t scount, struct ompi_datatype_t *sdtype,
void *rbuf, ompi_count_array_t rcounts, ompi_disp_array_t rdisps,
struct ompi_datatype_t *rdtype, struct ompi_communicator_t *comm,
struct ompi_info_t *info, 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;

COLL_UCC_GET_REQ_PC(coll_req);
UCC_VERBOSE(3, "allgatherv_init init %p", coll_req);
COLL_UCC_CHECK(mca_coll_ucc_allgatherv_iniz(sbuf, scount, sdtype, rbuf, rcounts, rdisps, rdtype,
true, ucc_module, &req, coll_req));
*request = &coll_req->super;
return OMPI_SUCCESS;
fallback:
UCC_VERBOSE(3, "running fallback allgatherv_init");
if (coll_req) {
mca_coll_ucc_req_free((ompi_request_t **) &coll_req);
}
return ucc_module->previous_allgatherv_init(sbuf, scount, sdtype, rbuf, rcounts, rdisps, rdtype,
comm, info, request,
ucc_module->previous_allgatherv_init_module);
}
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