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/* -*- Mode: C; c-basic-offset:2 ; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2006 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2006 The Technical University of Chemnitz. All
* rights reserved.
* Copyright (c) 2014-2018 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* Copyright (c) 2015-2017 Los Alamos National Security, LLC. All rights
* reserved.
* Copyright (c) 2017 IBM Corporation. All rights reserved.
* Copyright (c) 2018 FUJITSU LIMITED. All rights reserved.
* Copyright (c) 2021 Cisco Systems, Inc. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* Author(s): Torsten Hoefler <htor@cs.indiana.edu>
*
*/
#include "nbc_internal.h"
static inline int a2av_sched_linear(int rank, int p, NBC_Schedule *schedule,
const void *sendbuf, const int *sendcounts,
const int *sdispls, MPI_Aint sndext, MPI_Datatype sendtype, const size_t sdtype_size,
void *recvbuf, const int *recvcounts,
const int *rdispls, MPI_Aint rcvext, MPI_Datatype recvtype, const size_t rdtype_size);
static inline int a2av_sched_pairwise(int rank, int p, NBC_Schedule *schedule,
const void *sendbuf, const int *sendcounts, const int *sdispls,
MPI_Aint sndext, MPI_Datatype sendtype, const size_t sdtype_size,
void *recvbuf, const int *recvcounts, const int *rdispls,
MPI_Aint rcvext, MPI_Datatype recvtype, const size_t rdtype_size);
static inline int a2av_sched_inplace(int rank, int p, NBC_Schedule *schedule,
void *buf, const int *counts, const int *displs,
MPI_Aint ext, MPI_Datatype type, const size_t dtype_size, ptrdiff_t gap);
/* an alltoallv schedule can not be cached easily because the contents
* of the recvcounts array may change, so a comparison of the address
* would not be sufficient ... we simply do not cache it */
/* simple linear Alltoallv */
static int nbc_alltoallv_init(const void* sendbuf, const int *sendcounts, const int *sdispls,
MPI_Datatype sendtype, void* recvbuf, const int *recvcounts, const int *rdispls,
MPI_Datatype recvtype, struct ompi_communicator_t *comm, ompi_request_t ** request,
mca_coll_base_module_t *module, bool persistent)
{
int rank, p, res;
size_t sdtype_size, rdtype_size;
MPI_Aint sndext, rcvext;
NBC_Schedule *schedule;
char *rbuf, *sbuf, inplace;
ptrdiff_t gap = 0, span;
void * tmpbuf = NULL;
ompi_coll_libnbc_module_t *libnbc_module = (ompi_coll_libnbc_module_t*) module;
NBC_IN_PLACE(sendbuf, recvbuf, inplace);
rank = ompi_comm_rank (comm);
p = ompi_comm_size (comm);
ompi_datatype_type_size(recvtype, &rdtype_size);
res = ompi_datatype_type_extent (recvtype, &rcvext);
if (MPI_SUCCESS != res) {
NBC_Error("MPI Error in ompi_datatype_type_extent() (%i)", res);
return res;
}
/* copy data to receivbuffer */
if (inplace) {
int count = 0;
for (int i = 0; i < p; i++) {
if (recvcounts[i] > count) {
count = recvcounts[i];
}
}
span = opal_datatype_span(&recvtype->super, count, &gap);
/**
* If this process has no data to send or receive it can bail out early,
* but it needs to increase the nonblocking tag to stay in sync with the
* rest of the processes.
*/
if (OPAL_UNLIKELY(0 == span)) {
ompi_coll_base_nbc_reserve_tags(comm, 1);
return nbc_get_noop_request(persistent, request);
}
tmpbuf = malloc(span);
if (OPAL_UNLIKELY(NULL == tmpbuf)) {
return OMPI_ERR_OUT_OF_RESOURCE;
}
sendcounts = recvcounts;
sdispls = rdispls;
sndext = rcvext;
sdtype_size = rdtype_size;
} else {
ompi_datatype_type_size(sendtype, &sdtype_size);
res = ompi_datatype_type_extent (sendtype, &sndext);
if (MPI_SUCCESS != res) {
NBC_Error("MPI Error in ompi_datatype_type_extent() (%i)", res);
return res;
}
}
schedule = OBJ_NEW(NBC_Schedule);
if (OPAL_UNLIKELY(NULL == schedule)) {
free(tmpbuf);
return OMPI_ERR_OUT_OF_RESOURCE;
}
if (!inplace && 0 < sendcounts[rank] && 0 < sdtype_size) {
rbuf = (char *) recvbuf + rdispls[rank] * rcvext;
sbuf = (char *) sendbuf + sdispls[rank] * sndext;
res = NBC_Sched_copy (sbuf, false, sendcounts[rank], sendtype,
rbuf, false, recvcounts[rank], recvtype, schedule, false);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
OBJ_RELEASE(schedule);
return res;
}
}
if (inplace) {
res = a2av_sched_inplace(rank, p, schedule, recvbuf, recvcounts, rdispls, rcvext, recvtype,
rdtype_size, gap);
} else {
res = a2av_sched_linear(rank, p, schedule,
sendbuf, sendcounts, sdispls, sndext, sendtype, sdtype_size,
recvbuf, recvcounts, rdispls, rcvext, recvtype, rdtype_size);
}
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
OBJ_RELEASE(schedule);
free(tmpbuf);
return res;
}
res = NBC_Sched_commit (schedule);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
OBJ_RELEASE(schedule);
free(tmpbuf);
return res;
}
res = NBC_Schedule_request(schedule, comm, libnbc_module, persistent, request, tmpbuf);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
OBJ_RELEASE(schedule);
free(tmpbuf);
return res;
}
return OMPI_SUCCESS;
}
int ompi_coll_libnbc_ialltoallv(const void* sendbuf, const int *sendcounts, const int *sdispls,
MPI_Datatype sendtype, void* recvbuf, const int *recvcounts, const int *rdispls,
MPI_Datatype recvtype, struct ompi_communicator_t *comm, ompi_request_t ** request,
mca_coll_base_module_t *module) {
int res = nbc_alltoallv_init(sendbuf, sendcounts, sdispls, sendtype,
recvbuf, recvcounts, rdispls, recvtype,
comm, request, module, false);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
return res;
}
res = NBC_Start(*(ompi_coll_libnbc_request_t **)request);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
NBC_Return_handle (*(ompi_coll_libnbc_request_t **)request);
*request = &ompi_request_null.request;
return res;
}
return OMPI_SUCCESS;
}
/* simple linear Alltoallv */
static int nbc_alltoallv_inter_init (const void* sendbuf, const int *sendcounts, const int *sdispls,
MPI_Datatype sendtype, void* recvbuf, const int *recvcounts, const int *rdispls,
MPI_Datatype recvtype, struct ompi_communicator_t *comm, ompi_request_t ** request,
mca_coll_base_module_t *module, bool persistent)
{
int res, rsize;
size_t sdtype_size, rdtype_size;
MPI_Aint sndext, rcvext;
NBC_Schedule *schedule;
ompi_coll_libnbc_module_t *libnbc_module = (ompi_coll_libnbc_module_t*) module;
ompi_datatype_type_size(sendtype, &sdtype_size);
ompi_datatype_type_size(recvtype, &rdtype_size);
res = ompi_datatype_type_extent(sendtype, &sndext);
if (MPI_SUCCESS != res) {
NBC_Error("MPI Error in ompi_datatype_type_extent() (%i)", res);
return res;
}
res = ompi_datatype_type_extent(recvtype, &rcvext);
if (MPI_SUCCESS != res) {
NBC_Error("MPI Error in ompi_datatype_type_extent() (%i)", res);
return res;
}
rsize = ompi_comm_remote_size (comm);
schedule = OBJ_NEW(NBC_Schedule);
if (OPAL_UNLIKELY(NULL == schedule)) {
return OMPI_ERR_OUT_OF_RESOURCE;
}
for (int i = 0; i < rsize; i++) {
/* post all sends */
if (0 < sendcounts[i] && 0 < sdtype_size) {
char *sbuf = (char *) sendbuf + sdispls[i] * sndext;
res = NBC_Sched_send (sbuf, false, sendcounts[i], sendtype, i, schedule, false);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
OBJ_RELEASE(schedule);
return res;
}
}
/* post all receives */
if (0 < recvcounts[i] && 0 < rdtype_size) {
char *rbuf = (char *) recvbuf + rdispls[i] * rcvext;
res = NBC_Sched_recv (rbuf, false, recvcounts[i], recvtype, i, schedule, false);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
OBJ_RELEASE(schedule);
return res;
}
}
}
res = NBC_Sched_commit(schedule);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
OBJ_RELEASE(schedule);
return res;
}
res = NBC_Schedule_request(schedule, comm, libnbc_module, persistent, request, NULL);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
OBJ_RELEASE(schedule);
return res;
}
return OMPI_SUCCESS;
}
int ompi_coll_libnbc_ialltoallv_inter (const void* sendbuf, const int *sendcounts, const int *sdispls,
MPI_Datatype sendtype, void* recvbuf, const int *recvcounts, const int *rdispls,
MPI_Datatype recvtype, struct ompi_communicator_t *comm, ompi_request_t ** request,
mca_coll_base_module_t *module) {
int res = nbc_alltoallv_inter_init(sendbuf, sendcounts, sdispls, sendtype,
recvbuf, recvcounts, rdispls, recvtype,
comm, request, module, false);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
return res;
}
res = NBC_Start(*(ompi_coll_libnbc_request_t **)request);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
NBC_Return_handle (*(ompi_coll_libnbc_request_t **)request);
*request = &ompi_request_null.request;
return res;
}
return OMPI_SUCCESS;
}
__opal_attribute_unused__
static inline int a2av_sched_linear(int rank, int p, NBC_Schedule *schedule,
const void *sendbuf, const int *sendcounts, const int *sdispls,
MPI_Aint sndext, MPI_Datatype sendtype, const size_t sdtype_size,
void *recvbuf, const int *recvcounts, const int *rdispls,
MPI_Aint rcvext, MPI_Datatype recvtype, const size_t rdtype_size) {
int res;
for (int i = 0 ; i < p ; ++i) {
if (i == rank) {
continue;
}
/* post send */
if (0 < sendcounts[i] && 0 < sdtype_size) {
char *sbuf = ((char *) sendbuf) + (sdispls[i] * sndext);
res = NBC_Sched_send(sbuf, false, sendcounts[i], sendtype, i, schedule, false);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
return res;
}
}
/* post receive */
if (0 < recvcounts[i] && 0 < rdtype_size) {
char *rbuf = ((char *) recvbuf) + (rdispls[i] * rcvext);
res = NBC_Sched_recv(rbuf, false, recvcounts[i], recvtype, i, schedule, false);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
return res;
}
}
}
return OMPI_SUCCESS;
}
__opal_attribute_unused__
static inline int a2av_sched_pairwise(int rank, int p, NBC_Schedule *schedule,
const void *sendbuf, const int *sendcounts, const int *sdispls,
MPI_Aint sndext, MPI_Datatype sendtype, const size_t sdtype_size,
void *recvbuf, const int *recvcounts, const int *rdispls,
MPI_Aint rcvext, MPI_Datatype recvtype, const size_t rdtype_size) {
int res;
for (int i = 1 ; i < p ; ++i) {
int sndpeer = (rank + i) % p;
int rcvpeer = (rank + p - i) %p;
/* post send */
if (0 < sendcounts[sndpeer] && 0 < sdtype_size) {
char *sbuf = ((char *) sendbuf) + (sdispls[sndpeer] * sndext);
res = NBC_Sched_send(sbuf, false, sendcounts[sndpeer], sendtype, sndpeer, schedule, false);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
return res;
}
}
/* post receive */
if (0 < recvcounts[rcvpeer] && 0 < rdtype_size) {
char *rbuf = ((char *) recvbuf) + (rdispls[rcvpeer] * rcvext);
res = NBC_Sched_recv(rbuf, false, recvcounts[rcvpeer], recvtype, rcvpeer, schedule, true);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
return res;
}
}
}
return OMPI_SUCCESS;
}
static inline int a2av_sched_inplace(int rank, int p, NBC_Schedule *schedule,
void *buf, const int *counts, const int *displs,
MPI_Aint ext, MPI_Datatype type, const size_t dtype_size, ptrdiff_t gap) {
int res;
for (int i = 1; i < (p+1)/2; i++) {
int speer = (rank + i) % p;
int rpeer = (rank + p - i) % p;
char *sbuf = (char *) buf + displs[speer] * ext;
char *rbuf = (char *) buf + displs[rpeer] * ext;
if (0 == dtype_size) {
/* Nothing to exchange */
return OMPI_SUCCESS;
}
if (0 < counts[rpeer]) {
res = NBC_Sched_copy (rbuf, false, counts[rpeer], type,
(void *)(-gap), true, counts[rpeer], type,
schedule, true);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
return res;
}
}
if (0 < counts[speer]) {
res = NBC_Sched_send (sbuf, false , counts[speer], type, speer, schedule, false);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
return res;
}
}
if (0 < counts[rpeer]) {
res = NBC_Sched_recv (rbuf, false , counts[rpeer], type, rpeer, schedule, true);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
return res;
}
}
if (0 < counts[rpeer]) {
res = NBC_Sched_send ((void *)(-gap), true, counts[rpeer], type, rpeer, schedule, false);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
return res;
}
}
if (0 < counts[speer]) {
res = NBC_Sched_recv (sbuf, false, counts[speer], type, speer, schedule, true);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
return res;
}
}
}
if (0 == (p%2)) {
int peer = (rank + p/2) % p;
char *tbuf = (char *) buf + displs[peer] * ext;
if (0 < counts[peer]) {
res = NBC_Sched_copy(tbuf, false, counts[peer], type, (void *) (-gap), true, counts[peer],
type, schedule, true);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
return res;
}
}
if (0 < counts[peer]) {
res = NBC_Sched_send ((void *)(-gap), true , counts[peer], type, peer, schedule, false);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
return res;
}
res = NBC_Sched_recv (tbuf, false , counts[peer], type, peer, schedule, true);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
return res;
}
}
}
return OMPI_SUCCESS;
}
int ompi_coll_libnbc_alltoallv_init(const void* sendbuf, const int *sendcounts, const int *sdispls,
MPI_Datatype sendtype, void* recvbuf, const int *recvcounts, const int *rdispls,
MPI_Datatype recvtype, struct ompi_communicator_t *comm, MPI_Info info, ompi_request_t ** request,
mca_coll_base_module_t *module) {
int res = nbc_alltoallv_init(sendbuf, sendcounts, sdispls, sendtype, recvbuf, recvcounts, rdispls, recvtype,
comm, request, module, true);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
return res;
}
return OMPI_SUCCESS;
}
int ompi_coll_libnbc_alltoallv_inter_init(const void* sendbuf, const int *sendcounts, const int *sdispls,
MPI_Datatype sendtype, void* recvbuf, const int *recvcounts, const int *rdispls,
MPI_Datatype recvtype, struct ompi_communicator_t *comm, MPI_Info info, ompi_request_t ** request,
mca_coll_base_module_t *module) {
int res = nbc_alltoallv_inter_init(sendbuf, sendcounts, sdispls, sendtype, recvbuf, recvcounts, rdispls, recvtype,
comm, request, module, true);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
return res;
}
return OMPI_SUCCESS;
}
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