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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.
*
* Author(s): Torsten Hoefler <htor@cs.indiana.edu>
*
* Copyright (c) 2012 Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2013-2015 Los Alamos National Security, LLC. All rights
* reserved.
* Copyright (c) 2014-2018 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* Copyright (c) 2017 IBM Corporation. All rights reserved.
* Copyright (c) 2018 FUJITSU LIMITED. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
*/
#include "nbc_internal.h"
/* an allgatherv 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 MPI_Iallgatherv
* the algorithm uses p-1 rounds
* first round:
* each node sends to it's left node (rank+1)%p sendcount elements
* each node begins with it's right node (rank-11)%p and receives from it recvcounts[(rank+1)%p] elements
* second round:
* each node sends to node (rank+2)%p sendcount elements
* each node receives from node (rank-2)%p recvcounts[(rank+2)%p] elements */
static int nbc_allgatherv_init(const void* sendbuf, int sendcount, MPI_Datatype sendtype, void* recvbuf, const int *recvcounts, const int *displs,
MPI_Datatype recvtype, struct ompi_communicator_t *comm, ompi_request_t ** request,
mca_coll_base_module_t *module, bool persistent)
{
int rank, p, res, speer, rpeer;
MPI_Aint rcvext;
NBC_Schedule *schedule;
char *rbuf, *sbuf, inplace;
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);
res = ompi_datatype_type_extent (recvtype, &rcvext);
if (OPAL_UNLIKELY(MPI_SUCCESS != res)) {
NBC_Error ("MPI Error in ompi_datatype_type_extent() (%i)", res);
return res;
}
if (inplace) {
sendtype = recvtype;
sendcount = recvcounts[rank];
} else if (!persistent) { /* for persistent, the copy must be scheduled */
/* copy my data to receive buffer */
rbuf = (char *) recvbuf + displs[rank] * rcvext;
res = NBC_Copy (sendbuf, sendcount, sendtype, rbuf, recvcounts[rank], recvtype, comm);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
return res;
}
}
schedule = OBJ_NEW(NBC_Schedule);
if (NULL == schedule) {
return OMPI_ERR_OUT_OF_RESOURCE;
}
sbuf = (char *) recvbuf + displs[rank] * rcvext;
if (persistent && !inplace) { /* for nonblocking, data has been copied already */
/* copy my data to receive buffer (= send buffer of NBC_Sched_send) */
res = NBC_Sched_copy ((void *)sendbuf, false, sendcount, sendtype,
sbuf, false, recvcounts[rank], recvtype, schedule, true);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
OBJ_RELEASE(schedule);
return res;
}
}
/* do p-1 rounds */
for (int r = 1 ; r < p ; ++r) {
speer = (rank + r) % p;
rpeer = (rank - r + p) % p;
rbuf = (char *)recvbuf + displs[rpeer] * rcvext;
res = NBC_Sched_recv (rbuf, false, recvcounts[rpeer], recvtype, rpeer, schedule, false);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
OBJ_RELEASE(schedule);
return res;
}
/* send to rank r - not from the sendbuf to optimize MPI_IN_PLACE */
res = NBC_Sched_send (sbuf, false, recvcounts[rank], recvtype, speer, 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_iallgatherv(const void* sendbuf, int sendcount, MPI_Datatype sendtype, void* recvbuf, const int *recvcounts, const int *displs,
MPI_Datatype recvtype, struct ompi_communicator_t *comm, ompi_request_t ** request,
mca_coll_base_module_t *module) {
int res = nbc_allgatherv_init(sendbuf, sendcount, sendtype, recvbuf, recvcounts, displs, 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;
}
static int nbc_allgatherv_inter_init(const void* sendbuf, int sendcount, MPI_Datatype sendtype, void* recvbuf, const int *recvcounts, const int *displs,
MPI_Datatype recvtype, struct ompi_communicator_t *comm, ompi_request_t ** request,
mca_coll_base_module_t *module, bool persistent)
{
int res, rsize;
MPI_Aint rcvext;
NBC_Schedule *schedule;
ompi_coll_libnbc_module_t *libnbc_module = (ompi_coll_libnbc_module_t*) module;
rsize = ompi_comm_remote_size (comm);
res = ompi_datatype_type_extent(recvtype, &rcvext);
if (OPAL_UNLIKELY(MPI_SUCCESS != res)) {
NBC_Error ("MPI Error in ompi_datatype_type_extent() (%i)", res);
return res;
}
schedule = OBJ_NEW(NBC_Schedule);
if (NULL == schedule) {
return OMPI_ERR_OUT_OF_RESOURCE;
}
/* do rsize rounds */
for (int r = 0 ; r < rsize ; ++r) {
char *rbuf = (char *) recvbuf + displs[r] * rcvext;
if (recvcounts[r]) {
res = NBC_Sched_recv (rbuf, false, recvcounts[r], recvtype, r, schedule, false);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
OBJ_RELEASE(schedule);
return res;
}
}
}
if (sendcount) {
for (int r = 0 ; r < rsize ; ++r) {
res = NBC_Sched_send (sendbuf, false, sendcount, sendtype, r, 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_iallgatherv_inter(const void* sendbuf, int sendcount, MPI_Datatype sendtype, void* recvbuf, const int *recvcounts, const int *displs,
MPI_Datatype recvtype, struct ompi_communicator_t *comm, ompi_request_t ** request,
mca_coll_base_module_t *module) {
int res = nbc_allgatherv_inter_init(sendbuf, sendcount, sendtype, recvbuf, recvcounts, displs, 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;
}
int ompi_coll_libnbc_allgatherv_init(const void* sendbuf, int sendcount, MPI_Datatype sendtype, void* recvbuf, const int *recvcounts, const int *displs,
MPI_Datatype recvtype, struct ompi_communicator_t *comm, MPI_Info info, ompi_request_t ** request,
mca_coll_base_module_t *module) {
int res = nbc_allgatherv_init(sendbuf, sendcount, sendtype, recvbuf, recvcounts, displs, recvtype,
comm, request, module, true);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
return res;
}
return OMPI_SUCCESS;
}
int ompi_coll_libnbc_allgatherv_inter_init(const void* sendbuf, int sendcount, MPI_Datatype sendtype, void* recvbuf, const int *recvcounts, const int *displs,
MPI_Datatype recvtype, struct ompi_communicator_t *comm, MPI_Info info, ompi_request_t ** request,
mca_coll_base_module_t *module) {
int res = nbc_allgatherv_inter_init(sendbuf, sendcount, sendtype, recvbuf, recvcounts, displs, recvtype,
comm, request, module, true);
if (OPAL_UNLIKELY(OMPI_SUCCESS != res)) {
return res;
}
return OMPI_SUCCESS;
}
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