-/* Copyright (c) 2007, 2008, 2009, 2010. The SimGrid Team.
+/* Copyright (c) 2007-2013. The SimGrid Team.
* All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
#include "simix/smx_private.h"
#include "surf/surf.h"
#include "simgrid/sg_config.h"
-
+#include "colls/colls.h"
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_base, smpi, "Logging specific to SMPI (base)");
xbt_assert(ref, "Cannot match recv against null reference");
xbt_assert(req, "Cannot match recv against null request");
if((ref->src == MPI_ANY_SOURCE || req->src == ref->src)
- && (ref->tag == MPI_ANY_TAG || req->tag == ref->tag)){
+ && ((ref->tag == MPI_ANY_TAG && req->tag >=0) || req->tag == ref->tag)){
//we match, we can transfer some values
// FIXME : move this to the copy function ?
if(ref->src == MPI_ANY_SOURCE)ref->real_src = req->src;
if(req->detached==1){
ref->detached_sender=req; //tie the sender to the receiver, as it is detached and has to be freed in the receiver
}
+ XBT_DEBUG("match succeeded");
return 1;
}else return 0;
}
xbt_assert(req, "Cannot match send against null request");
if((req->src == MPI_ANY_SOURCE || req->src == ref->src)
- && (req->tag == MPI_ANY_TAG || req->tag == ref->tag))
+ && ((req->tag == MPI_ANY_TAG && ref->tag >=0)|| req->tag == ref->tag))
{
if(req->src == MPI_ANY_SOURCE)req->real_src = ref->src;
if(req->tag == MPI_ANY_TAG)req->real_tag = ref->tag;
if(ref->detached==1){
req->detached_sender=ref; //tie the sender to the receiver, as it is detached and has to be freed in the receiver
}
-
+ XBT_DEBUG("match succeeded");
return 1;
} else return 0;
}
MPI_Datatype datatype, int src, int dst,
int tag, MPI_Comm comm, unsigned flags)
{
- MPI_Request request;
+ MPI_Request request = NULL;
void *old_buf = NULL;
request->flags = flags;
request->detached = 0;
request->detached_sender = NULL;
+ request->real_src = 0;
request->truncated = 0;
request->real_size = 0;
MPI_Request smpi_mpi_send_init(void *buf, int count, MPI_Datatype datatype,
int dst, int tag, MPI_Comm comm)
{
- MPI_Request request =
- build_request(buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
- comm, PERSISTENT | SEND);
+ MPI_Request request = NULL;
+ request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
+ comm, PERSISTENT | SEND | PREPARED);
request->refcount++;
return request;
}
MPI_Request smpi_mpi_ssend_init(void *buf, int count, MPI_Datatype datatype,
int dst, int tag, MPI_Comm comm)
{
- MPI_Request request =
- build_request(buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
- comm, PERSISTENT | SSEND | SEND);
+ MPI_Request request = NULL;
+ request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
+ comm, PERSISTENT | SSEND | SEND | PREPARED);
request->refcount++;
return request;
}
MPI_Request smpi_mpi_recv_init(void *buf, int count, MPI_Datatype datatype,
int src, int tag, MPI_Comm comm)
{
- MPI_Request request =
- build_request(buf, count, datatype, src == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : smpi_group_index(smpi_comm_group(comm), src), smpi_process_index(), tag,
- comm, PERSISTENT | RECV);
+ MPI_Request request = NULL;
+ request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, src == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : smpi_group_index(smpi_comm_group(comm), src), smpi_process_index(), tag,
+ comm, PERSISTENT | RECV | PREPARED);
request->refcount++;
return request;
}
xbt_assert(!request->action,
"Cannot (re)start a non-finished communication");
+ if(request->flags & PREPARED)request->flags &= ~PREPARED;
if(request->flags & RECV) {
print_request("New recv", request);
+ //FIXME: if receive is posted with a large size, but send is smaller, mailboxes may not match !
if (request->size < sg_cfg_get_int("smpi/async_small_thres"))
mailbox = smpi_process_mailbox_small();
else
// we make a copy here, as the size is modified by simix, and we may reuse the request in another receive later
request->real_size=request->size;
smpi_datatype_use(request->old_type);
+ smpi_comm_use(request->comm);
request->action = simcall_comm_irecv(mailbox, request->buf, &request->real_size, &match_recv, request);
//integrate pseudo-timing for buffering of small messages, do not bother to execute the simcall if 0
#ifdef HAVE_TRACING
int rank = smpi_process_index();
if (TRACE_smpi_view_internals()) {
- TRACE_smpi_send(rank, rank, receiver);
+ TRACE_smpi_send(rank, rank, receiver,request->size);
}
#endif
/* if(receiver == MPI_UNDEFINED) {*/
// we make a copy here, as the size is modified by simix, and we may reuse the request in another receive later
request->real_size=request->size;
smpi_datatype_use(request->old_type);
+ smpi_comm_use(request->comm);
//if we are giving back the control to the user without waiting for completion, we have to inject timings
double sleeptime =0.0;
void smpi_mpi_request_free(MPI_Request * request)
{
-
if((*request) != MPI_REQUEST_NULL){
(*request)->refcount--;
if((*request)->refcount<0) xbt_die("wrong refcount");
MPI_Request smpi_isend_init(void *buf, int count, MPI_Datatype datatype,
int dst, int tag, MPI_Comm comm)
{
- MPI_Request request =
- build_request(buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
- comm, NON_PERSISTENT | SEND);
-
+ MPI_Request request = NULL;
+ request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf , count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
+ comm, NON_PERSISTENT | ISEND | SEND | PREPARED);
return request;
}
MPI_Request smpi_mpi_isend(void *buf, int count, MPI_Datatype datatype,
int dst, int tag, MPI_Comm comm)
{
- MPI_Request request =
- build_request(buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
- comm, NON_PERSISTENT | ISEND | SEND);
-
+ MPI_Request request = NULL;
+ request = build_request(buf==MPI_BOTTOM?(void*)0:buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
+ comm, NON_PERSISTENT | ISEND | SEND);
smpi_mpi_start(request);
return request;
}
MPI_Request smpi_mpi_issend(void *buf, int count, MPI_Datatype datatype,
int dst, int tag, MPI_Comm comm)
{
- MPI_Request request =
- build_request(buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
- comm, NON_PERSISTENT | ISEND | SSEND | SEND);
+ MPI_Request request = NULL;
+ request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
+ comm, NON_PERSISTENT | ISEND | SSEND | SEND);
smpi_mpi_start(request);
return request;
}
MPI_Request smpi_irecv_init(void *buf, int count, MPI_Datatype datatype,
int src, int tag, MPI_Comm comm)
{
- MPI_Request request =
- build_request(buf, count, datatype, src == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : smpi_group_index(smpi_comm_group(comm), src), smpi_process_index(), tag,
- comm, NON_PERSISTENT | RECV);
+ MPI_Request request = NULL;
+ request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, src == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : smpi_group_index(smpi_comm_group(comm), src), smpi_process_index(), tag,
+ comm, NON_PERSISTENT | RECV | PREPARED);
return request;
}
MPI_Request smpi_mpi_irecv(void *buf, int count, MPI_Datatype datatype,
int src, int tag, MPI_Comm comm)
{
- MPI_Request request =
- build_request(buf, count, datatype, src == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : smpi_group_index(smpi_comm_group(comm), src), smpi_process_index(), tag,
- comm, NON_PERSISTENT | RECV);
-
+ MPI_Request request = NULL;
+ request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, src == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : smpi_group_index(smpi_comm_group(comm), src), smpi_process_index(), tag,
+ comm, NON_PERSISTENT | RECV);
smpi_mpi_start(request);
return request;
}
void smpi_mpi_recv(void *buf, int count, MPI_Datatype datatype, int src,
int tag, MPI_Comm comm, MPI_Status * status)
{
- MPI_Request request;
+ MPI_Request request = NULL;
request = smpi_mpi_irecv(buf, count, datatype, src, tag, comm);
smpi_mpi_wait(&request, status);
+ request = NULL;
}
void smpi_mpi_send(void *buf, int count, MPI_Datatype datatype, int dst,
int tag, MPI_Comm comm)
{
- MPI_Request request =
- build_request(buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
- comm, NON_PERSISTENT | SEND);
+ MPI_Request request = NULL;
+ request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
+ comm, NON_PERSISTENT | SEND);
+
smpi_mpi_start(request);
smpi_mpi_wait(&request, MPI_STATUS_IGNORE);
-
+ request = NULL;
}
void smpi_mpi_ssend(void *buf, int count, MPI_Datatype datatype,
int dst, int tag, MPI_Comm comm)
{
- MPI_Request request =
- build_request(buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
- comm, NON_PERSISTENT | SSEND | SEND);
+ MPI_Request request = NULL;
+ request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
+ comm, NON_PERSISTENT | SSEND | SEND);
smpi_mpi_start(request);
smpi_mpi_wait(&request, MPI_STATUS_IGNORE);
+ request = NULL;
}
void smpi_mpi_sendrecv(void *sendbuf, int sendcount, MPI_Datatype sendtype,
{
MPI_Request requests[2];
MPI_Status stats[2];
-
+ int myid=smpi_process_index();
+ if ((smpi_group_index(smpi_comm_group(comm), dst) == myid) && (smpi_group_index(smpi_comm_group(comm), src) == myid)) {
+ smpi_datatype_copy(sendbuf, sendcount, sendtype,
+ recvbuf, recvcount, recvtype);
+ return;
+ }
requests[0] =
smpi_isend_init(sendbuf, sendcount, sendtype, dst, sendtag, comm);
requests[1] =
if(status != MPI_STATUS_IGNORE)
smpi_empty_status(status);
- if(!(req->detached && req->flags & SEND)){
- if(status != MPI_STATUS_IGNORE) {
+ if(!(req->detached && req->flags & SEND) && !(req->flags & PREPARED)){
+ if(status != MPI_STATUS_IGNORE) {
int src = req->src == MPI_ANY_SOURCE ? req->real_src : req->src;
status->MPI_SOURCE = smpi_group_rank(smpi_comm_group(req->comm), src);
status->MPI_TAG = req->tag == MPI_ANY_TAG ? req->real_tag : req->tag;
}
if(req->detached == 0) free(req->buf);
}
+ smpi_comm_unuse(req->comm);
smpi_datatype_unuse(datatype);
}
if (TRACE_smpi_view_internals()) {
if(req->flags & RECV){
int rank = smpi_process_index();
- int src_traced = smpi_group_index(smpi_comm_group(req->comm), req->src == MPI_ANY_SOURCE ? req->real_src : req->src);
+ int src_traced = (req->src == MPI_ANY_SOURCE ? req->real_src : req->src);
TRACE_smpi_recv(rank, src_traced, rank);
}
}
*index = MPI_UNDEFINED;
flag = 0;
- if(count > 0) {
- comms = xbt_dynar_new(sizeof(smx_action_t), NULL);
- map = xbt_new(int, count);
- size = 0;
- for(i = 0; i < count; i++) {
- if((requests[i]!=MPI_REQUEST_NULL) && requests[i]->action) {
- xbt_dynar_push(comms, &requests[i]->action);
- map[size] = i;
- size++;
- }
+ comms = xbt_dynar_new(sizeof(smx_action_t), NULL);
+ map = xbt_new(int, count);
+ size = 0;
+ for(i = 0; i < count; i++) {
+ if((requests[i]!=MPI_REQUEST_NULL) && requests[i]->action) {
+ xbt_dynar_push(comms, &requests[i]->action);
+ map[size] = i;
+ size++;
}
- if(size > 0) {
- i = simcall_comm_testany(comms);
- // not MPI_UNDEFINED, as this is a simix return code
- if(i != -1) {
- *index = map[i];
- finish_wait(&requests[*index], status);
- flag = 1;
- }
- }else{
- //all requests are null or inactive, return true
- flag=1;
- smpi_empty_status(status);
+ }
+ if(size > 0) {
+ i = simcall_comm_testany(comms);
+ // not MPI_UNDEFINED, as this is a simix return code
+ if(i != -1) {
+ *index = map[i];
+ finish_wait(&requests[*index], status);
+ flag = 1;
}
- xbt_free(map);
- xbt_dynar_free(&comms);
+ }else{
+ //all requests are null or inactive, return true
+ flag=1;
+ smpi_empty_status(status);
}
+ xbt_free(map);
+ xbt_dynar_free(&comms);
return flag;
}
if(requests[i]!= MPI_REQUEST_NULL){
if (smpi_mpi_test(&requests[i], pstat)!=1){
flag=0;
+ }else{
+ requests[i]=MPI_REQUEST_NULL;
}
}else{
smpi_empty_status(pstat);
if(request->action){
MPI_Request req = (MPI_Request)SIMIX_comm_get_src_data(request->action);
*flag = 1;
- if(status != MPI_STATUS_IGNORE) {
+ if(status != MPI_STATUS_IGNORE && !(req->flags & PREPARED)) {
status->MPI_SOURCE = smpi_group_rank(smpi_comm_group(comm), req->src);
status->MPI_TAG = req->tag;
status->MPI_ERROR = MPI_SUCCESS;
if ((*request)->action != NULL) { // this is not a detached send
simcall_comm_wait((*request)->action, -1.0);
}
- finish_wait(request, status);
+#ifdef HAVE_MC
+ if(MC_is_active())
+ (*request)->action->comm.dst_data = NULL; // dangling pointer : dst_data is freed with a wait, need to set it to NULL for system state comparison
+#endif
+
+ finish_wait(request, status);
+ request=MPI_REQUEST_NULL;
// FIXME for a detached send, finish_wait is not called:
}
for(i = 0; i < incount; i++) {
if((requests[i] != MPI_REQUEST_NULL)) {
if(smpi_mpi_test(&requests[i], pstat)) {
- indices[count] = i;
+ indices[i] = 1;
count++;
if(status != MPI_STATUSES_IGNORE) {
status[i] = *pstat;
void *recvbuf, int recvcount, MPI_Datatype recvtype,
int root, MPI_Comm comm)
{
- int system_tag = 666;
+ int system_tag = COLL_TAG_GATHER;
int rank, size, src, index;
MPI_Aint lb = 0, recvext = 0;
MPI_Request *requests;
int i, size, count;
int *displs;
int rank = smpi_process_index();
+ void *tmpbuf;
+
/* arbitrarily choose root as rank 0 */
size = smpi_comm_size(comm);
count = 0;
displs[i] = count;
count += recvcounts[i];
}
- mpi_coll_reduce_fun(sendbuf, recvbuf, count, datatype, op, 0, comm);
- smpi_mpi_scatterv(recvbuf, recvcounts, displs, datatype, recvbuf,
+ tmpbuf=(void*)xbt_malloc(count*smpi_datatype_get_extent(datatype));
+ mpi_coll_reduce_fun(sendbuf, tmpbuf, count, datatype, op, 0, comm);
+ smpi_mpi_scatterv(tmpbuf, recvcounts, displs, datatype, recvbuf,
recvcounts[rank], datatype, 0, comm);
xbt_free(displs);
+ xbt_free(tmpbuf);
}
void smpi_mpi_gatherv(void *sendbuf, int sendcount, MPI_Datatype sendtype,
void *recvbuf, int *recvcounts, int *displs,
MPI_Datatype recvtype, int root, MPI_Comm comm)
{
- int system_tag = 666;
+ int system_tag = COLL_TAG_GATHERV;
int rank, size, src, index;
MPI_Aint lb = 0, recvext = 0;
MPI_Request *requests;
int recvcount, MPI_Datatype recvtype,
MPI_Comm comm)
{
- int system_tag = 666;
+ int system_tag = COLL_TAG_ALLGATHER;
int rank, size, other, index;
MPI_Aint lb = 0, recvext = 0;
MPI_Request *requests;
int *recvcounts, int *displs,
MPI_Datatype recvtype, MPI_Comm comm)
{
- int system_tag = 666;
+ int system_tag = COLL_TAG_ALLGATHERV;
int rank, size, other, index;
MPI_Aint lb = 0, recvext = 0;
MPI_Request *requests;
void *recvbuf, int recvcount, MPI_Datatype recvtype,
int root, MPI_Comm comm)
{
- int system_tag = 666;
+ int system_tag = COLL_TAG_SCATTER;
int rank, size, dst, index;
MPI_Aint lb = 0, sendext = 0;
MPI_Request *requests;
// FIXME: check for errors
smpi_datatype_extent(sendtype, &lb, &sendext);
// Local copy from root
- smpi_datatype_copy((char *)sendbuf + root * sendcount * sendext,
- sendcount, sendtype, recvbuf, recvcount, recvtype);
+ if(recvbuf!=MPI_IN_PLACE){
+ smpi_datatype_copy((char *)sendbuf + root * sendcount * sendext,
+ sendcount, sendtype, recvbuf, recvcount, recvtype);
+ }
// Send buffers to receivers
requests = xbt_new(MPI_Request, size - 1);
index = 0;
MPI_Datatype sendtype, void *recvbuf, int recvcount,
MPI_Datatype recvtype, int root, MPI_Comm comm)
{
- int system_tag = 666;
+ int system_tag = COLL_TAG_SCATTERV;
int rank, size, dst, index;
MPI_Aint lb = 0, sendext = 0;
MPI_Request *requests;
// FIXME: check for errors
smpi_datatype_extent(sendtype, &lb, &sendext);
// Local copy from root
- smpi_datatype_copy((char *)sendbuf + displs[root] * sendext, sendcounts[root],
+ if(recvbuf!=MPI_IN_PLACE){
+ smpi_datatype_copy((char *)sendbuf + displs[root] * sendext, sendcounts[root],
sendtype, recvbuf, recvcount, recvtype);
+ }
// Send buffers to receivers
requests = xbt_new(MPI_Request, size - 1);
index = 0;
MPI_Datatype datatype, MPI_Op op, int root,
MPI_Comm comm)
{
- int system_tag = 666;
+ int system_tag = COLL_TAG_REDUCE;
int rank, size, src, index;
MPI_Aint lb = 0, dataext = 0;
MPI_Request *requests;
void **tmpbufs;
+
+ char* sendtmpbuf = (char*) sendbuf;
+ if( sendbuf == MPI_IN_PLACE ) {
+ sendtmpbuf = (char *)xbt_malloc(count*smpi_datatype_get_extent(datatype));
+ smpi_datatype_copy(recvbuf, count, datatype,sendtmpbuf, count, datatype);
+ }
+
rank = smpi_comm_rank(comm);
size = smpi_comm_size(comm);
+ //non commutative case, use a working algo from openmpi
+ if(!smpi_op_is_commute(op)){
+ smpi_coll_tuned_reduce_ompi_basic_linear(sendtmpbuf, recvbuf, count,
+ datatype, op, root, comm);
+ return;
+ }
+
if(rank != root) {
// Send buffer to root
- smpi_mpi_send(sendbuf, count, datatype, root, system_tag, comm);
+ smpi_mpi_send(sendtmpbuf, count, datatype, root, system_tag, comm);
} else {
// FIXME: check for errors
smpi_datatype_extent(datatype, &lb, &dataext);
// Local copy from root
- if (sendbuf && recvbuf)
- smpi_datatype_copy(sendbuf, count, datatype, recvbuf, count, datatype);
+ if (sendtmpbuf && recvbuf)
+ smpi_datatype_copy(sendtmpbuf, count, datatype, recvbuf, count, datatype);
// Receive buffers from senders
//TODO: make a MPI_barrier here ?
requests = xbt_new(MPI_Request, size - 1);
}
xbt_free(tmpbufs);
xbt_free(requests);
+
+ if( sendbuf == MPI_IN_PLACE ) {
+ xbt_free(sendtmpbuf);
+ }
}
}
void smpi_mpi_scan(void *sendbuf, void *recvbuf, int count,
MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
{
- int system_tag = 666;
+ int system_tag = -888;
int rank, size, other, index;
MPI_Aint lb = 0, dataext = 0;
MPI_Request *requests;
}
// Wait for completion of all comms.
smpi_mpi_startall(size - 1, requests);
- for(other = 0; other < size - 1; other++) {
- index = smpi_mpi_waitany(size - 1, requests, MPI_STATUS_IGNORE);
- if(index == MPI_UNDEFINED) {
- break;
+
+ if(smpi_op_is_commute(op)){
+ for(other = 0; other < size - 1; other++) {
+ index = smpi_mpi_waitany(size - 1, requests, MPI_STATUS_IGNORE);
+ if(index == MPI_UNDEFINED) {
+ break;
+ }
+ if(index < rank) {
+ // #Request is below rank: it's a irecv
+ smpi_op_apply(op, tmpbufs[index], recvbuf, &count, &datatype);
+ }
+ }
+ }else{
+ //non commutative case, wait in order
+ for(other = 0; other < size - 1; other++) {
+ smpi_mpi_wait(&(requests[other]), MPI_STATUS_IGNORE);
+ if(index < rank) {
+ smpi_op_apply(op, tmpbufs[other], recvbuf, &count, &datatype);
+ }
}
- if(index < rank) {
- // #Request is below rank: it's a irecv
- smpi_op_apply(op, tmpbufs[index], recvbuf, &count, &datatype);
+ }
+ for(index = 0; index < rank; index++) {
+ xbt_free(tmpbufs[index]);
+ }
+ xbt_free(tmpbufs);
+ xbt_free(requests);
+}
+
+void smpi_mpi_exscan(void *sendbuf, void *recvbuf, int count,
+ MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
+{
+ int system_tag = -888;
+ int rank, size, other, index;
+ MPI_Aint lb = 0, dataext = 0;
+ MPI_Request *requests;
+ void **tmpbufs;
+ int recvbuf_is_empty=1;
+ rank = smpi_comm_rank(comm);
+ size = smpi_comm_size(comm);
+
+ // FIXME: check for errors
+ smpi_datatype_extent(datatype, &lb, &dataext);
+
+ // Send/Recv buffers to/from others;
+ requests = xbt_new(MPI_Request, size - 1);
+ tmpbufs = xbt_new(void *, rank);
+ index = 0;
+ for(other = 0; other < rank; other++) {
+ // FIXME: possibly overkill we we have contiguous/noncontiguous data
+ // mapping...
+ tmpbufs[index] = xbt_malloc(count * dataext);
+ requests[index] =
+ smpi_irecv_init(tmpbufs[index], count, datatype, other, system_tag,
+ comm);
+ index++;
+ }
+ for(other = rank + 1; other < size; other++) {
+ requests[index] =
+ smpi_isend_init(sendbuf, count, datatype, other, system_tag, comm);
+ index++;
+ }
+ // Wait for completion of all comms.
+ smpi_mpi_startall(size - 1, requests);
+ if(smpi_op_is_commute(op)){
+ for(other = 0; other < size - 1; other++) {
+ index = smpi_mpi_waitany(size - 1, requests, MPI_STATUS_IGNORE);
+ if(index == MPI_UNDEFINED) {
+ break;
+ }
+ if(index < rank) {
+ if(recvbuf_is_empty){
+ smpi_datatype_copy(tmpbufs[index], count, datatype, recvbuf, count, datatype);
+ recvbuf_is_empty=0;
+ }else
+ // #Request is below rank: it's a irecv
+ smpi_op_apply(op, tmpbufs[index], recvbuf, &count, &datatype);
+ }
+ }
+ }else{
+ //non commutative case, wait in order
+ for(other = 0; other < size - 1; other++) {
+ smpi_mpi_wait(&(requests[other]), MPI_STATUS_IGNORE);
+ if(index < rank) {
+ if(recvbuf_is_empty){
+ smpi_datatype_copy(tmpbufs[other], count, datatype, recvbuf, count, datatype);
+ recvbuf_is_empty=0;
+ }else smpi_op_apply(op, tmpbufs[other], recvbuf, &count, &datatype);
+ }
}
}
for(index = 0; index < rank; index++) {
