1 /* Copyright (c) 2007-2020. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "smpi_request.hpp"
10 #include "simgrid/Exception.hpp"
11 #include "simgrid/s4u/Exec.hpp"
12 #include "smpi_comm.hpp"
13 #include "smpi_datatype.hpp"
14 #include "smpi_host.hpp"
15 #include "smpi_op.hpp"
16 #include "src/kernel/activity/CommImpl.hpp"
17 #include "src/mc/mc_replay.hpp"
18 #include "src/smpi/include/smpi_actor.hpp"
22 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_request, smpi, "Logging specific to SMPI (request)");
24 static simgrid::config::Flag<double> smpi_iprobe_sleep(
25 "smpi/iprobe", "Minimum time to inject inside a call to MPI_Iprobe", 1e-4);
26 static simgrid::config::Flag<double> smpi_test_sleep(
27 "smpi/test", "Minimum time to inject inside a call to MPI_Test", 1e-4);
29 std::vector<s_smpi_factor_t> smpi_ois_values;
31 extern void (*smpi_comm_copy_data_callback)(simgrid::kernel::activity::CommImpl*, void*, size_t);
36 Request::Request(const void* buf, int count, MPI_Datatype datatype, int src, int dst, int tag, MPI_Comm comm,
37 unsigned flags, MPI_Op op)
38 : buf_(const_cast<void*>(buf))
40 , size_(datatype->size() * count)
50 if(op != MPI_REPLACE && op != MPI_OP_NULL)
54 detached_sender_ = nullptr;
59 if (flags & MPI_REQ_PERSISTENT)
64 generalized_funcs=nullptr;
65 nbc_requests_=nullptr;
74 void Request::unref(MPI_Request* request)
76 if((*request) != MPI_REQUEST_NULL){
77 (*request)->refcount_--;
78 if((*request)->refcount_ < 0) {
79 (*request)->print_request("wrong refcount");
80 xbt_die("Whoops, wrong refcount");
82 if((*request)->refcount_==0){
83 if ((*request)->flags_ & MPI_REQ_GENERALIZED){
84 ((*request)->generalized_funcs)->free_fn(((*request)->generalized_funcs)->extra_state);
85 delete (*request)->generalized_funcs;
87 Comm::unref((*request)->comm_);
88 Datatype::unref((*request)->old_type_);
90 if ((*request)->op_!=MPI_REPLACE && (*request)->op_!=MPI_OP_NULL)
91 Op::unref(&(*request)->op_);
93 (*request)->print_request("Destroying");
95 *request = MPI_REQUEST_NULL;
97 (*request)->print_request("Decrementing");
100 xbt_die("freeing an already free request");
104 bool Request::match_common(MPI_Request req, MPI_Request sender, MPI_Request receiver)
106 xbt_assert(sender, "Cannot match against null sender");
107 xbt_assert(receiver, "Cannot match against null receiver");
108 XBT_DEBUG("Trying to match %s of sender src %d against %d, tag %d against %d, id %d against %d",
109 (req == receiver ? "send" : "recv"), sender->src_, receiver->src_, sender->tag_, receiver->tag_,
110 sender->comm_->id(), receiver->comm_->id());
112 if ((receiver->comm_->id() == MPI_UNDEFINED || sender->comm_->id() == MPI_UNDEFINED ||
113 receiver->comm_->id() == sender->comm_->id()) &&
114 ((receiver->src_ == MPI_ANY_SOURCE && (receiver->comm_->group()->rank(sender->src_) != MPI_UNDEFINED)) ||
115 receiver->src_ == sender->src_) &&
116 ((receiver->tag_ == MPI_ANY_TAG && sender->tag_ >= 0) || receiver->tag_ == sender->tag_)) {
117 // we match, we can transfer some values
118 if (receiver->src_ == MPI_ANY_SOURCE)
119 receiver->real_src_ = sender->src_;
120 if (receiver->tag_ == MPI_ANY_TAG)
121 receiver->real_tag_ = sender->tag_;
122 if (receiver->real_size_ < sender->real_size_)
123 receiver->truncated_ = true;
124 if (sender->detached_)
125 receiver->detached_sender_ = sender; // tie the sender to the receiver, as it is detached and has to be freed in
127 if (req->cancelled_ == 0)
128 req->cancelled_ = -1; // mark as uncancelable
129 XBT_DEBUG("match succeeded");
135 void Request::init_buffer(int count){
136 void *old_buf = nullptr;
137 // FIXME Handle the case of a partial shared malloc.
138 // This part handles the problem of non-contiguous memory (for the unserialization at the reception)
139 if ((((flags_ & MPI_REQ_RECV) != 0) && ((flags_ & MPI_REQ_ACCUMULATE) != 0)) || (old_type_->flags() & DT_FLAG_DERIVED)) {
140 // This part handles the problem of non-contiguous memory
145 buf_ = xbt_malloc(count*old_type_->size());
146 if ((old_type_->flags() & DT_FLAG_DERIVED) && ((flags_ & MPI_REQ_SEND) != 0)) {
147 old_type_->serialize(old_buf, buf_, count);
154 bool Request::match_recv(void* a, void* b, simgrid::kernel::activity::CommImpl*)
156 MPI_Request ref = static_cast<MPI_Request>(a);
157 MPI_Request req = static_cast<MPI_Request>(b);
158 return match_common(req, req, ref);
161 bool Request::match_send(void* a, void* b, simgrid::kernel::activity::CommImpl*)
163 MPI_Request ref = static_cast<MPI_Request>(a);
164 MPI_Request req = static_cast<MPI_Request>(b);
165 return match_common(req, ref, req);
168 void Request::print_request(const char* message) const
170 XBT_VERB("%s request %p [buf = %p, size = %zu, src = %d, dst = %d, tag = %d, flags = %x]",
171 message, this, buf_, size_, src_, dst_, tag_, flags_);
174 /* factories, to hide the internal flags from the caller */
175 MPI_Request Request::bsend_init(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
177 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
178 comm->group()->actor(dst)->get_pid(), tag, comm,
179 MPI_REQ_PERSISTENT | MPI_REQ_SEND | MPI_REQ_PREPARED | MPI_REQ_BSEND);
182 MPI_Request Request::send_init(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
184 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
185 comm->group()->actor(dst)->get_pid(), tag, comm,
186 MPI_REQ_PERSISTENT | MPI_REQ_SEND | MPI_REQ_PREPARED);
189 MPI_Request Request::ssend_init(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
191 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
192 comm->group()->actor(dst)->get_pid(), tag, comm,
193 MPI_REQ_PERSISTENT | MPI_REQ_SSEND | MPI_REQ_SEND | MPI_REQ_PREPARED);
196 MPI_Request Request::isend_init(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
198 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
199 comm->group()->actor(dst)->get_pid(), tag, comm,
200 MPI_REQ_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SEND | MPI_REQ_PREPARED);
204 MPI_Request Request::rma_send_init(const void *buf, int count, MPI_Datatype datatype, int src, int dst, int tag, MPI_Comm comm,
207 MPI_Request request = nullptr; /* MC needs the comm to be set to nullptr during the call */
209 request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, comm->group()->actor(src)->get_pid(),
210 comm->group()->actor(dst)->get_pid(), tag, comm,
211 MPI_REQ_RMA | MPI_REQ_NON_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SEND | MPI_REQ_PREPARED);
213 request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, comm->group()->actor(src)->get_pid(),
214 comm->group()->actor(dst)->get_pid(), tag, comm,
215 MPI_REQ_RMA | MPI_REQ_NON_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SEND | MPI_REQ_PREPARED |
216 MPI_REQ_ACCUMULATE, op);
221 MPI_Request Request::recv_init(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm)
223 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype,
224 src == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : comm->group()->actor(src)->get_pid(),
225 simgrid::s4u::this_actor::get_pid(), tag, comm,
226 MPI_REQ_PERSISTENT | MPI_REQ_RECV | MPI_REQ_PREPARED);
229 MPI_Request Request::rma_recv_init(void *buf, int count, MPI_Datatype datatype, int src, int dst, int tag, MPI_Comm comm,
232 MPI_Request request = nullptr; /* MC needs the comm to be set to nullptr during the call */
234 request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, comm->group()->actor(src)->get_pid(),
235 comm->group()->actor(dst)->get_pid(), tag, comm,
236 MPI_REQ_RMA | MPI_REQ_NON_PERSISTENT | MPI_REQ_RECV | MPI_REQ_PREPARED);
238 request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, comm->group()->actor(src)->get_pid(),
239 comm->group()->actor(dst)->get_pid(), tag, comm,
240 MPI_REQ_RMA | MPI_REQ_NON_PERSISTENT | MPI_REQ_RECV | MPI_REQ_PREPARED | MPI_REQ_ACCUMULATE, op);
245 MPI_Request Request::irecv_init(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm)
247 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype,
248 src == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : comm->group()->actor(src)->get_pid(),
249 simgrid::s4u::this_actor::get_pid(), tag, comm,
250 MPI_REQ_PERSISTENT | MPI_REQ_RECV | MPI_REQ_PREPARED);
253 MPI_Request Request::ibsend(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
255 MPI_Request request = nullptr; /* MC needs the comm to be set to nullptr during the call */
256 request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
257 comm->group()->actor(dst)->get_pid(), tag, comm,
258 MPI_REQ_NON_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SEND | MPI_REQ_BSEND);
263 MPI_Request Request::isend(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
265 MPI_Request request = nullptr; /* MC needs the comm to be set to nullptr during the call */
266 request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
267 comm->group()->actor(dst)->get_pid(), tag, comm,
268 MPI_REQ_NON_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SEND);
273 MPI_Request Request::issend(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
275 MPI_Request request = nullptr; /* MC needs the comm to be set to nullptr during the call */
276 request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
277 comm->group()->actor(dst)->get_pid(), tag, comm,
278 MPI_REQ_NON_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SSEND | MPI_REQ_SEND);
284 MPI_Request Request::irecv(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm)
286 MPI_Request request = nullptr; /* MC needs the comm to be set to nullptr during the call */
287 request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype,
288 src == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : comm->group()->actor(src)->get_pid(),
289 simgrid::s4u::this_actor::get_pid(), tag, comm, MPI_REQ_NON_PERSISTENT | MPI_REQ_RECV);
294 void Request::recv(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm, MPI_Status * status)
296 MPI_Request request = nullptr; /* MC needs the comm to be set to nullptr during the call */
297 request = irecv(buf, count, datatype, src, tag, comm);
298 wait(&request,status);
302 void Request::bsend(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
304 MPI_Request request = nullptr; /* MC needs the comm to be set to nullptr during the call */
305 request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
306 comm->group()->actor(dst)->get_pid(), tag, comm, MPI_REQ_NON_PERSISTENT | MPI_REQ_SEND | MPI_REQ_BSEND);
309 wait(&request, MPI_STATUS_IGNORE);
313 void Request::send(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
315 MPI_Request request = nullptr; /* MC needs the comm to be set to nullptr during the call */
316 request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
317 comm->group()->actor(dst)->get_pid(), tag, comm, MPI_REQ_NON_PERSISTENT | MPI_REQ_SEND);
320 wait(&request, MPI_STATUS_IGNORE);
324 void Request::ssend(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
326 MPI_Request request = nullptr; /* MC needs the comm to be set to nullptr during the call */
327 request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
328 comm->group()->actor(dst)->get_pid(), tag, comm,
329 MPI_REQ_NON_PERSISTENT | MPI_REQ_SSEND | MPI_REQ_SEND);
332 wait(&request,MPI_STATUS_IGNORE);
336 void Request::sendrecv(const void *sendbuf, int sendcount, MPI_Datatype sendtype,int dst, int sendtag,
337 void *recvbuf, int recvcount, MPI_Datatype recvtype, int src, int recvtag,
338 MPI_Comm comm, MPI_Status * status)
340 MPI_Request requests[2];
342 int myid = simgrid::s4u::this_actor::get_pid();
343 if ((comm->group()->actor(dst)->get_pid() == myid) && (comm->group()->actor(src)->get_pid() == myid)) {
344 Datatype::copy(sendbuf, sendcount, sendtype, recvbuf, recvcount, recvtype);
345 if (status != MPI_STATUS_IGNORE) {
346 status->MPI_SOURCE = src;
347 status->MPI_TAG = recvtag;
348 status->MPI_ERROR = MPI_SUCCESS;
349 status->count = sendcount * sendtype->size();
353 requests[0] = isend_init(sendbuf, sendcount, sendtype, dst, sendtag, comm);
354 requests[1] = irecv_init(recvbuf, recvcount, recvtype, src, recvtag, comm);
355 startall(2, requests);
356 waitall(2, requests, stats);
359 if(status != MPI_STATUS_IGNORE) {
360 // Copy receive status
365 void Request::start()
367 s4u::Mailbox* mailbox;
369 xbt_assert(action_ == nullptr, "Cannot (re-)start unfinished communication");
370 //reinitialize temporary buffer for persistent requests
371 if(real_size_ > 0 && flags_ & MPI_REQ_FINISHED){
373 init_buffer(real_size_/old_type_->size());
375 flags_ &= ~MPI_REQ_PREPARED;
376 flags_ &= ~MPI_REQ_FINISHED;
379 if ((flags_ & MPI_REQ_RECV) != 0) {
380 this->print_request("New recv");
382 simgrid::smpi::ActorExt* process = smpi_process_remote(simgrid::s4u::Actor::by_pid(dst_));
384 simgrid::s4u::MutexPtr mut = process->mailboxes_mutex();
385 if (smpi_cfg_async_small_thresh() != 0 || (flags_ & MPI_REQ_RMA) != 0)
388 if (smpi_cfg_async_small_thresh() == 0 && (flags_ & MPI_REQ_RMA) == 0) {
389 mailbox = process->mailbox();
390 } else if (((flags_ & MPI_REQ_RMA) != 0) || static_cast<int>(size_) < smpi_cfg_async_small_thresh()) {
391 //We have to check both mailboxes (because SSEND messages are sent to the large mbox).
392 //begin with the more appropriate one : the small one.
393 mailbox = process->mailbox_small();
394 XBT_DEBUG("Is there a corresponding send already posted in the small mailbox %s (in case of SSEND)?",
395 mailbox->get_cname());
396 simgrid::kernel::activity::ActivityImplPtr action = mailbox->iprobe(0, &match_recv, static_cast<void*>(this));
398 if (action == nullptr) {
399 mailbox = process->mailbox();
400 XBT_DEBUG("No, nothing in the small mailbox test the other one : %s", mailbox->get_cname());
401 action = mailbox->iprobe(0, &match_recv, static_cast<void*>(this));
402 if (action == nullptr) {
403 XBT_DEBUG("Still nothing, switch back to the small mailbox : %s", mailbox->get_cname());
404 mailbox = process->mailbox_small();
407 XBT_DEBUG("yes there was something for us in the large mailbox");
410 mailbox = process->mailbox_small();
411 XBT_DEBUG("Is there a corresponding send already posted the small mailbox?");
412 simgrid::kernel::activity::ActivityImplPtr action = mailbox->iprobe(0, &match_recv, static_cast<void*>(this));
414 if (action == nullptr) {
415 XBT_DEBUG("No, nothing in the permanent receive mailbox");
416 mailbox = process->mailbox();
418 XBT_DEBUG("yes there was something for us in the small mailbox");
422 // we make a copy here, as the size is modified by simix, and we may reuse the request in another receive later
424 action_ = simcall_comm_irecv(
425 process->get_actor()->get_impl(), mailbox->get_impl(), buf_, &real_size_, &match_recv,
426 process->replaying() ? &smpi_comm_null_copy_buffer_callback : smpi_comm_copy_data_callback, this, -1.0);
427 XBT_DEBUG("recv simcall posted");
429 if (smpi_cfg_async_small_thresh() != 0 || (flags_ & MPI_REQ_RMA) != 0)
431 } else { /* the RECV flag was not set, so this is a send */
432 const simgrid::smpi::ActorExt* process = smpi_process_remote(simgrid::s4u::Actor::by_pid(dst_));
433 xbt_assert(process, "Actor pid=%d is gone??", dst_);
435 if (TRACE_smpi_view_internals()) {
436 TRACE_smpi_send(rank, rank, dst_, tag_, size_);
438 this->print_request("New send");
441 if ((flags_ & MPI_REQ_SSEND) == 0 &&
442 ((flags_ & MPI_REQ_RMA) != 0 || (flags_ & MPI_REQ_BSEND) != 0 ||
443 static_cast<int>(size_) < smpi_cfg_detached_send_thresh())) {
444 void *oldbuf = nullptr;
446 XBT_DEBUG("Send request %p is detached", this);
448 if (not(old_type_->flags() & DT_FLAG_DERIVED)) {
450 if (not process->replaying() && oldbuf != nullptr && size_ != 0) {
451 if ((smpi_cfg_privatization() != SmpiPrivStrategies::NONE) &&
452 (static_cast<char*>(buf_) >= smpi_data_exe_start) &&
453 (static_cast<char*>(buf_) < smpi_data_exe_start + smpi_data_exe_size)) {
454 XBT_DEBUG("Privatization : We are sending from a zone inside global memory. Switch data segment ");
455 smpi_switch_data_segment(simgrid::s4u::Actor::by_pid(src_));
457 //we need this temporary buffer even for bsend, as it will be released in the copy callback and we don't have a way to differentiate it
458 //so actually ... don't use manually attached buffer space.
459 buf = xbt_malloc(size_);
460 memcpy(buf,oldbuf,size_);
461 XBT_DEBUG("buf %p copied into %p",oldbuf,buf);
466 //if we are giving back the control to the user without waiting for completion, we have to inject timings
467 double sleeptime = 0.0;
468 if (detached_ || ((flags_ & (MPI_REQ_ISEND | MPI_REQ_SSEND)) != 0)) { // issend should be treated as isend
469 // isend and send timings may be different
470 sleeptime = ((flags_ & MPI_REQ_ISEND) != 0)
471 ? simgrid::s4u::Actor::self()->get_host()->extension<simgrid::smpi::Host>()->oisend(size_)
472 : simgrid::s4u::Actor::self()->get_host()->extension<simgrid::smpi::Host>()->osend(size_);
476 simgrid::s4u::this_actor::sleep_for(sleeptime);
477 XBT_DEBUG("sending size of %zu : sleep %f ", size_, sleeptime);
480 simgrid::s4u::MutexPtr mut = process->mailboxes_mutex();
482 if (smpi_cfg_async_small_thresh() != 0 || (flags_ & MPI_REQ_RMA) != 0)
485 if (not(smpi_cfg_async_small_thresh() != 0 || (flags_ & MPI_REQ_RMA) != 0)) {
486 mailbox = process->mailbox();
487 } else if (((flags_ & MPI_REQ_RMA) != 0) || static_cast<int>(size_) < smpi_cfg_async_small_thresh()) { // eager mode
488 mailbox = process->mailbox();
489 XBT_DEBUG("Is there a corresponding recv already posted in the large mailbox %s?", mailbox->get_cname());
490 simgrid::kernel::activity::ActivityImplPtr action = mailbox->iprobe(1, &match_send, static_cast<void*>(this));
491 if (action == nullptr) {
492 if ((flags_ & MPI_REQ_SSEND) == 0) {
493 mailbox = process->mailbox_small();
494 XBT_DEBUG("No, nothing in the large mailbox, message is to be sent on the small one %s",
495 mailbox->get_cname());
497 mailbox = process->mailbox_small();
498 XBT_DEBUG("SSEND : Is there a corresponding recv already posted in the small mailbox %s?",
499 mailbox->get_cname());
500 action = mailbox->iprobe(1, &match_send, static_cast<void*>(this));
501 if (action == nullptr) {
502 XBT_DEBUG("No, we are first, send to large mailbox");
503 mailbox = process->mailbox();
507 XBT_DEBUG("Yes there was something for us in the large mailbox");
510 mailbox = process->mailbox();
511 XBT_DEBUG("Send request %p is in the large mailbox %s (buf: %p)", this, mailbox->get_cname(), buf_);
514 // we make a copy here, as the size is modified by simix, and we may reuse the request in another receive later
516 size_t payload_size_ = size_ + 16;//MPI enveloppe size (tag+dest+communicator)
517 action_ = simcall_comm_isend(
518 simgrid::s4u::Actor::by_pid(src_)->get_impl(), mailbox->get_impl(), payload_size_, -1.0, buf, real_size_, &match_send,
519 &xbt_free_f, // how to free the userdata if a detached send fails
520 process->replaying() ? &smpi_comm_null_copy_buffer_callback : smpi_comm_copy_data_callback, this,
521 // detach if msg size < eager/rdv switch limit
523 XBT_DEBUG("send simcall posted");
525 /* FIXME: detached sends are not traceable (action_ == nullptr) */
526 if (action_ != nullptr) {
527 boost::static_pointer_cast<kernel::activity::CommImpl>(action_)->set_tracing_category(
528 smpi_process()->get_tracing_category());
531 if (smpi_cfg_async_small_thresh() != 0 || ((flags_ & MPI_REQ_RMA) != 0))
536 void Request::startall(int count, MPI_Request * requests)
538 if(requests== nullptr)
541 for(int i = 0; i < count; i++) {
542 requests[i]->start();
546 void Request::cancel()
550 if (this->action_ != nullptr)
551 (boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(this->action_))->cancel();
554 int Request::test(MPI_Request * request, MPI_Status * status, int* flag) {
555 //assume that request is not MPI_REQUEST_NULL (filtered in PMPI_Test or testall before)
556 // to avoid deadlocks if used as a break condition, such as
557 // while (MPI_Test(request, flag, status) && flag) dostuff...
558 // because the time will not normally advance when only calls to MPI_Test are made -> deadlock
559 // multiplier to the sleeptime, to increase speed of execution, each failed test will increase it
560 static int nsleeps = 1;
561 int ret = MPI_SUCCESS;
563 // Are we testing a request meant for non blocking collectives ?
564 // If so, test all the subrequests.
565 if ((*request)->nbc_requests_size_>0){
566 ret = testall((*request)->nbc_requests_size_, (*request)->nbc_requests_, flag, MPI_STATUSES_IGNORE);
568 delete[] (*request)->nbc_requests_;
569 (*request)->nbc_requests_size_=0;
575 if(smpi_test_sleep > 0)
576 simgrid::s4u::this_actor::sleep_for(nsleeps * smpi_test_sleep);
578 Status::empty(status);
580 if (((*request)->flags_ & (MPI_REQ_PREPARED | MPI_REQ_FINISHED)) == 0) {
581 if ((*request)->action_ != nullptr && (*request)->cancelled_ != 1){
583 *flag = simcall_comm_test((*request)->action_.get());
584 } catch (const Exception&) {
589 if (*request != MPI_REQUEST_NULL &&
590 ((*request)->flags_ & MPI_REQ_GENERALIZED)
591 && !((*request)->flags_ & MPI_REQ_COMPLETE))
594 finish_wait(request,status);
595 if (*request != MPI_REQUEST_NULL && ((*request)->flags_ & MPI_REQ_GENERALIZED)){
596 MPI_Status* mystatus;
597 if(status==MPI_STATUS_IGNORE){
598 mystatus=new MPI_Status();
599 Status::empty(mystatus);
603 ret = ((*request)->generalized_funcs)->query_fn(((*request)->generalized_funcs)->extra_state, mystatus);
604 if(status==MPI_STATUS_IGNORE)
607 nsleeps=1;//reset the number of sleeps we will do next time
608 if (*request != MPI_REQUEST_NULL && ((*request)->flags_ & MPI_REQ_PERSISTENT) == 0)
609 *request = MPI_REQUEST_NULL;
610 } else if (smpi_cfg_grow_injected_times()) {
617 int Request::testsome(int incount, MPI_Request requests[], int *count, int *indices, MPI_Status status[])
623 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
626 for (int i = 0; i < incount; i++) {
627 if (requests[i] != MPI_REQUEST_NULL && not (requests[i]->flags_ & MPI_REQ_FINISHED)) {
628 int ret = test(&requests[i], pstat, &flag);
633 if (status != MPI_STATUSES_IGNORE)
634 status[*count] = *pstat;
636 if ((requests[i] != MPI_REQUEST_NULL) && (requests[i]->flags_ & MPI_REQ_NON_PERSISTENT))
637 requests[i] = MPI_REQUEST_NULL;
643 if(count_dead==incount)*count=MPI_UNDEFINED;
645 return MPI_ERR_IN_STATUS;
650 int Request::testany(int count, MPI_Request requests[], int *index, int* flag, MPI_Status * status)
652 std::vector<simgrid::kernel::activity::CommImpl*> comms;
653 comms.reserve(count);
657 int ret = MPI_SUCCESS;
658 *index = MPI_UNDEFINED;
660 std::vector<int> map; /** Maps all matching comms back to their location in requests **/
661 for(i = 0; i < count; i++) {
662 if ((requests[i] != MPI_REQUEST_NULL) && requests[i]->action_ && not(requests[i]->flags_ & MPI_REQ_PREPARED)) {
663 comms.push_back(static_cast<simgrid::kernel::activity::CommImpl*>(requests[i]->action_.get()));
667 if (not map.empty()) {
668 //multiplier to the sleeptime, to increase speed of execution, each failed testany will increase it
669 static int nsleeps = 1;
670 if(smpi_test_sleep > 0)
671 simgrid::s4u::this_actor::sleep_for(nsleeps * smpi_test_sleep);
673 i = simcall_comm_testany(comms.data(), comms.size()); // The i-th element in comms matches!
674 } catch (const Exception&) {
675 XBT_DEBUG("Exception in testany");
679 if (i != -1) { // -1 is not MPI_UNDEFINED but a SIMIX return code. (nothing matches)
681 if (requests[*index] != MPI_REQUEST_NULL &&
682 (requests[*index]->flags_ & MPI_REQ_GENERALIZED)
683 && !(requests[*index]->flags_ & MPI_REQ_COMPLETE)) {
686 finish_wait(&requests[*index],status);
687 if (requests[*index] != MPI_REQUEST_NULL && (requests[*index]->flags_ & MPI_REQ_GENERALIZED)){
688 MPI_Status* mystatus;
689 if(status==MPI_STATUS_IGNORE){
690 mystatus=new MPI_Status();
691 Status::empty(mystatus);
695 ret=(requests[*index]->generalized_funcs)->query_fn((requests[*index]->generalized_funcs)->extra_state, mystatus);
696 if(status==MPI_STATUS_IGNORE)
700 if (requests[*index] != MPI_REQUEST_NULL && (requests[*index]->flags_ & MPI_REQ_NON_PERSISTENT))
701 requests[*index] = MPI_REQUEST_NULL;
702 XBT_DEBUG("Testany - returning with index %d", *index);
710 XBT_DEBUG("Testany on inactive handles, returning flag=1 but empty status");
711 //all requests are null or inactive, return true
713 *index = MPI_UNDEFINED;
714 Status::empty(status);
720 int Request::testall(int count, MPI_Request requests[], int* outflag, MPI_Status status[])
723 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
727 for(int i=0; i<count; i++){
728 if (requests[i] != MPI_REQUEST_NULL && not(requests[i]->flags_ & MPI_REQ_PREPARED)) {
729 int ret = test(&requests[i], pstat, &flag);
732 requests[i]=MPI_REQUEST_NULL;
736 if (ret != MPI_SUCCESS)
739 Status::empty(pstat);
741 if(status != MPI_STATUSES_IGNORE) {
746 return MPI_ERR_IN_STATUS;
751 void Request::probe(int source, int tag, MPI_Comm comm, MPI_Status* status){
753 //FIXME find another way to avoid busy waiting ?
754 // the issue here is that we have to wait on a nonexistent comm
756 iprobe(source, tag, comm, &flag, status);
757 XBT_DEBUG("Busy Waiting on probing : %d", flag);
761 void Request::iprobe(int source, int tag, MPI_Comm comm, int* flag, MPI_Status* status){
762 // to avoid deadlock, we have to sleep some time here, or the timer won't advance and we will only do iprobe simcalls
763 // especially when used as a break condition, such as while (MPI_Iprobe(...)) dostuff...
764 // nsleeps is a multiplier to the sleeptime, to increase speed of execution, each failed iprobe will increase it
765 // This can speed up the execution of certain applications by an order of magnitude, such as HPL
766 static int nsleeps = 1;
767 double speed = s4u::this_actor::get_host()->get_speed();
768 double maxrate = smpi_cfg_iprobe_cpu_usage();
769 MPI_Request request = new Request(nullptr, 0, MPI_CHAR,
770 source == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : comm->group()->actor(source)->get_pid(),
771 simgrid::s4u::this_actor::get_pid(), tag, comm, MPI_REQ_PERSISTENT | MPI_REQ_RECV);
772 if (smpi_iprobe_sleep > 0) {
773 /** Compute the number of flops we will sleep **/
774 s4u::this_actor::exec_init(/*nsleeps: See comment above */ nsleeps *
775 /*(seconds * flop/s -> total flops)*/ smpi_iprobe_sleep * speed * maxrate)
777 /* Not the entire CPU can be used when iprobing: This is important for
778 * the energy consumption caused by polling with iprobes.
779 * Note also that the number of flops that was
780 * computed above contains a maxrate factor and is hence reduced (maxrate < 1)
782 ->set_bound(maxrate*speed)
786 // behave like a receive, but don't do it
787 s4u::Mailbox* mailbox;
789 request->print_request("New iprobe");
790 // We have to test both mailboxes as we don't know if we will receive one or another
791 if (smpi_cfg_async_small_thresh() > 0) {
792 mailbox = smpi_process()->mailbox_small();
793 XBT_DEBUG("Trying to probe the perm recv mailbox");
794 request->action_ = mailbox->iprobe(0, &match_recv, static_cast<void*>(request));
797 if (request->action_ == nullptr){
798 mailbox = smpi_process()->mailbox();
799 XBT_DEBUG("trying to probe the other mailbox");
800 request->action_ = mailbox->iprobe(0, &match_recv, static_cast<void*>(request));
803 if (request->action_ != nullptr){
804 kernel::activity::CommImplPtr sync_comm = boost::static_pointer_cast<kernel::activity::CommImpl>(request->action_);
805 const Request* req = static_cast<MPI_Request>(sync_comm->src_data_);
807 if (status != MPI_STATUS_IGNORE && (req->flags_ & MPI_REQ_PREPARED) == 0) {
808 status->MPI_SOURCE = comm->group()->rank(req->src_);
809 status->MPI_TAG = req->tag_;
810 status->MPI_ERROR = MPI_SUCCESS;
811 status->count = req->real_size_;
813 nsleeps = 1;//reset the number of sleeps we will do next time
817 if (smpi_cfg_grow_injected_times())
821 xbt_assert(request == MPI_REQUEST_NULL);
824 void Request::finish_wait(MPI_Request* request, MPI_Status * status)
826 MPI_Request req = *request;
827 Status::empty(status);
829 if (req->cancelled_==1){
830 if (status!=MPI_STATUS_IGNORE)
832 if(req->detached_sender_ != nullptr)
833 unref(&(req->detached_sender_));
838 if ((req->flags_ & (MPI_REQ_PREPARED | MPI_REQ_GENERALIZED | MPI_REQ_FINISHED)) == 0) {
839 if(status != MPI_STATUS_IGNORE) {
840 int src = req->src_ == MPI_ANY_SOURCE ? req->real_src_ : req->src_;
841 status->MPI_SOURCE = req->comm_->group()->rank(src);
842 status->MPI_TAG = req->tag_ == MPI_ANY_TAG ? req->real_tag_ : req->tag_;
843 status->MPI_ERROR = req->truncated_ ? MPI_ERR_TRUNCATE : MPI_SUCCESS;
844 // this handles the case were size in receive differs from size in send
845 status->count = req->real_size_;
847 //detached send will be finished at the other end
848 if (not(req->detached_ && ((req->flags_ & MPI_REQ_SEND) != 0))) {
849 req->print_request("Finishing");
850 MPI_Datatype datatype = req->old_type_;
852 // FIXME Handle the case of a partial shared malloc.
853 if (((req->flags_ & MPI_REQ_ACCUMULATE) != 0) ||
854 (datatype->flags() & DT_FLAG_DERIVED)) { // && (not smpi_is_shared(req->old_buf_))){
855 if (not smpi_process()->replaying() && smpi_cfg_privatization() != SmpiPrivStrategies::NONE &&
856 static_cast<char*>(req->old_buf_) >= smpi_data_exe_start &&
857 static_cast<char*>(req->old_buf_) < smpi_data_exe_start + smpi_data_exe_size) {
858 XBT_VERB("Privatization : We are unserializing to a zone in global memory Switch data segment ");
859 smpi_switch_data_segment(simgrid::s4u::Actor::self());
862 if(datatype->flags() & DT_FLAG_DERIVED){
863 // This part handles the problem of non-contiguous memory the unserialization at the reception
864 if ((req->flags_ & MPI_REQ_RECV) && datatype->size() != 0)
865 datatype->unserialize(req->buf_, req->old_buf_, req->real_size_/datatype->size() , req->op_);
868 } else if (req->flags_ & MPI_REQ_RECV) { // apply op on contiguous buffer for accumulate
869 if (datatype->size() != 0) {
870 int n = req->real_size_ / datatype->size();
871 req->op_->apply(req->buf_, req->old_buf_, &n, datatype);
880 if (TRACE_smpi_view_internals() && ((req->flags_ & MPI_REQ_RECV) != 0)) {
881 int rank = simgrid::s4u::this_actor::get_pid();
882 int src_traced = (req->src_ == MPI_ANY_SOURCE ? req->real_src_ : req->src_);
883 TRACE_smpi_recv(src_traced, rank,req->tag_);
885 if(req->detached_sender_ != nullptr){
886 //integrate pseudo-timing for buffering of small messages, do not bother to execute the simcall if 0
888 simgrid::s4u::Actor::self()->get_host()->extension<simgrid::smpi::Host>()->orecv(req->real_size());
889 if (sleeptime > 0.0) {
890 simgrid::s4u::this_actor::sleep_for(sleeptime);
891 XBT_DEBUG("receiving size of %zu : sleep %f ", req->real_size_, sleeptime);
893 unref(&(req->detached_sender_));
895 if (req->flags_ & MPI_REQ_PERSISTENT)
896 req->action_ = nullptr;
897 req->flags_ |= MPI_REQ_FINISHED;
901 int Request::wait(MPI_Request * request, MPI_Status * status)
904 // Are we waiting on a request meant for non blocking collectives ?
905 // If so, wait for all the subrequests.
906 if ((*request)->nbc_requests_size_>0){
907 ret = waitall((*request)->nbc_requests_size_, (*request)->nbc_requests_, MPI_STATUSES_IGNORE);
908 for (int i = 0; i < (*request)->nbc_requests_size_; i++) {
909 if((*request)->buf_!=nullptr && (*request)->nbc_requests_[i]!=MPI_REQUEST_NULL){//reduce case
910 void * buf=(*request)->nbc_requests_[i]->buf_;
911 if((*request)->old_type_->flags() & DT_FLAG_DERIVED)
912 buf=(*request)->nbc_requests_[i]->old_buf_;
913 if((*request)->nbc_requests_[i]->flags_ & MPI_REQ_RECV ){
914 if((*request)->op_!=MPI_OP_NULL){
915 int count=(*request)->size_/ (*request)->old_type_->size();
916 (*request)->op_->apply(buf, (*request)->buf_, &count, (*request)->old_type_);
918 smpi_free_tmp_buffer(static_cast<unsigned char*>(buf));
921 if((*request)->nbc_requests_[i]!=MPI_REQUEST_NULL)
922 Request::unref(&((*request)->nbc_requests_[i]));
924 delete[] (*request)->nbc_requests_;
925 (*request)->nbc_requests_size_=0;
927 (*request)=MPI_REQUEST_NULL;
931 (*request)->print_request("Waiting");
932 if ((*request)->flags_ & (MPI_REQ_PREPARED | MPI_REQ_FINISHED)) {
933 Status::empty(status);
937 if ((*request)->action_ != nullptr){
939 // this is not a detached send
940 simcall_comm_wait((*request)->action_.get(), -1.0);
941 } catch (const Exception&) {
942 XBT_VERB("Request cancelled");
946 if (*request != MPI_REQUEST_NULL && ((*request)->flags_ & MPI_REQ_GENERALIZED)){
947 MPI_Status* mystatus;
948 if(!((*request)->flags_ & MPI_REQ_COMPLETE)){
949 ((*request)->generalized_funcs)->mutex->lock();
950 ((*request)->generalized_funcs)->cond->wait(((*request)->generalized_funcs)->mutex);
951 ((*request)->generalized_funcs)->mutex->unlock();
953 if(status==MPI_STATUS_IGNORE){
954 mystatus=new MPI_Status();
955 Status::empty(mystatus);
959 ret = ((*request)->generalized_funcs)->query_fn(((*request)->generalized_funcs)->extra_state, mystatus);
960 if(status==MPI_STATUS_IGNORE)
964 finish_wait(request,status);
965 if (*request != MPI_REQUEST_NULL && (((*request)->flags_ & MPI_REQ_NON_PERSISTENT) != 0))
966 *request = MPI_REQUEST_NULL;
970 int Request::waitany(int count, MPI_Request requests[], MPI_Status * status)
972 std::vector<simgrid::kernel::activity::CommImpl*> comms;
973 comms.reserve(count);
974 int index = MPI_UNDEFINED;
977 // Wait for a request to complete
978 std::vector<int> map;
979 XBT_DEBUG("Wait for one of %d", count);
980 for(int i = 0; i < count; i++) {
981 if (requests[i] != MPI_REQUEST_NULL && not(requests[i]->flags_ & MPI_REQ_PREPARED) &&
982 not(requests[i]->flags_ & MPI_REQ_FINISHED)) {
983 if (requests[i]->action_ != nullptr) {
984 XBT_DEBUG("Waiting any %p ", requests[i]);
985 comms.push_back(static_cast<simgrid::kernel::activity::CommImpl*>(requests[i]->action_.get()));
988 // This is a finished detached request, let's return this one
989 comms.clear(); // so we free don't do the waitany call
991 finish_wait(&requests[i], status); // cleanup if refcount = 0
992 if (requests[i] != MPI_REQUEST_NULL && (requests[i]->flags_ & MPI_REQ_NON_PERSISTENT))
993 requests[i] = MPI_REQUEST_NULL; // set to null
998 if (not comms.empty()) {
999 XBT_DEBUG("Enter waitany for %zu comms", comms.size());
1000 int i=MPI_UNDEFINED;
1002 // this is not a detached send
1003 i = simcall_comm_waitany(comms.data(), comms.size(), -1);
1004 } catch (const Exception&) {
1005 XBT_INFO("request %d cancelled ", i);
1009 // not MPI_UNDEFINED, as this is a simix return code
1012 //in case of an accumulate, we have to wait the end of all requests to apply the operation, ordered correctly.
1013 if ((requests[index] == MPI_REQUEST_NULL) ||
1014 (not((requests[index]->flags_ & MPI_REQ_ACCUMULATE) && (requests[index]->flags_ & MPI_REQ_RECV)))) {
1015 finish_wait(&requests[index],status);
1016 if (requests[index] != MPI_REQUEST_NULL && (requests[index]->flags_ & MPI_REQ_NON_PERSISTENT))
1017 requests[index] = MPI_REQUEST_NULL;
1023 if (index==MPI_UNDEFINED)
1024 Status::empty(status);
1029 static int sort_accumulates(const Request* a, const Request* b)
1031 return (a->tag() > b->tag());
1034 int Request::waitall(int count, MPI_Request requests[], MPI_Status status[])
1036 std::vector<MPI_Request> accumulates;
1039 MPI_Status *pstat = (status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat);
1040 int retvalue = MPI_SUCCESS;
1041 //tag invalid requests in the set
1042 if (status != MPI_STATUSES_IGNORE) {
1043 for (int c = 0; c < count; c++) {
1044 if (requests[c] == MPI_REQUEST_NULL || requests[c]->dst_ == MPI_PROC_NULL ||
1045 (requests[c]->flags_ & MPI_REQ_PREPARED)) {
1046 Status::empty(&status[c]);
1047 } else if (requests[c]->src_ == MPI_PROC_NULL) {
1048 Status::empty(&status[c]);
1049 status[c].MPI_SOURCE = MPI_PROC_NULL;
1053 for (int c = 0; c < count; c++) {
1054 if (MC_is_active() || MC_record_replay_is_active()) {
1055 wait(&requests[c],pstat);
1058 index = waitany(count, requests, pstat);
1060 if (index == MPI_UNDEFINED)
1063 if (requests[index] != MPI_REQUEST_NULL && (requests[index]->flags_ & MPI_REQ_RECV) &&
1064 (requests[index]->flags_ & MPI_REQ_ACCUMULATE))
1065 accumulates.push_back(requests[index]);
1066 if (requests[index] != MPI_REQUEST_NULL && (requests[index]->flags_ & MPI_REQ_NON_PERSISTENT))
1067 requests[index] = MPI_REQUEST_NULL;
1069 if (status != MPI_STATUSES_IGNORE) {
1070 status[index] = *pstat;
1071 if (status[index].MPI_ERROR == MPI_ERR_TRUNCATE)
1072 retvalue = MPI_ERR_IN_STATUS;
1076 if (not accumulates.empty()) {
1077 std::sort(accumulates.begin(), accumulates.end(), sort_accumulates);
1078 for (auto& req : accumulates) {
1079 finish_wait(&req, status);
1086 int Request::waitsome(int incount, MPI_Request requests[], int *indices, MPI_Status status[])
1092 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
1093 index = waitany(incount, requests, pstat);
1094 if(index==MPI_UNDEFINED) return MPI_UNDEFINED;
1095 if(status != MPI_STATUSES_IGNORE) {
1096 status[count] = *pstat;
1098 indices[count] = index;
1100 for (int i = 0; i < incount; i++) {
1101 if (i!=index && requests[i] != MPI_REQUEST_NULL
1102 && not(requests[i]->flags_ & MPI_REQ_FINISHED)) {
1103 test(&requests[i], pstat,&flag);
1106 if(status != MPI_STATUSES_IGNORE) {
1107 status[count] = *pstat;
1109 if (requests[i] != MPI_REQUEST_NULL && (requests[i]->flags_ & MPI_REQ_NON_PERSISTENT))
1110 requests[i]=MPI_REQUEST_NULL;
1118 MPI_Request Request::f2c(int id)
1121 if(id==MPI_FORTRAN_REQUEST_NULL)
1122 return MPI_REQUEST_NULL;
1123 return static_cast<MPI_Request>(F2C::f2c_lookup()->at(get_key(key,id)));
1126 void Request::free_f(int id)
1128 if (id != MPI_FORTRAN_REQUEST_NULL) {
1130 F2C::f2c_lookup()->erase(get_key(key, id));
1134 int Request::get_status(const Request* req, int* flag, MPI_Status* status)
1138 if(req != MPI_REQUEST_NULL && req->action_ != nullptr) {
1139 req->iprobe(req->src_, req->tag_, req->comm_, flag, status);
1143 if (req != MPI_REQUEST_NULL &&
1144 (req->flags_ & MPI_REQ_GENERALIZED)
1145 && !(req->flags_ & MPI_REQ_COMPLETE)) {
1151 if(req != MPI_REQUEST_NULL &&
1152 status != MPI_STATUS_IGNORE) {
1153 int src = req->src_ == MPI_ANY_SOURCE ? req->real_src_ : req->src_;
1154 status->MPI_SOURCE = req->comm_->group()->rank(src);
1155 status->MPI_TAG = req->tag_ == MPI_ANY_TAG ? req->real_tag_ : req->tag_;
1156 status->MPI_ERROR = req->truncated_ ? MPI_ERR_TRUNCATE : MPI_SUCCESS;
1157 status->count = req->real_size_;
1162 int Request::grequest_start(MPI_Grequest_query_function* query_fn, MPI_Grequest_free_function* free_fn,
1163 MPI_Grequest_cancel_function* cancel_fn, void* extra_state, MPI_Request* request)
1165 *request = new Request();
1166 (*request)->flags_ |= MPI_REQ_GENERALIZED;
1167 (*request)->flags_ |= MPI_REQ_PERSISTENT;
1168 (*request)->refcount_ = 1;
1169 ((*request)->generalized_funcs) = new s_smpi_mpi_generalized_request_funcs_t;
1170 ((*request)->generalized_funcs)->query_fn=query_fn;
1171 ((*request)->generalized_funcs)->free_fn=free_fn;
1172 ((*request)->generalized_funcs)->cancel_fn=cancel_fn;
1173 ((*request)->generalized_funcs)->extra_state=extra_state;
1174 ((*request)->generalized_funcs)->cond = simgrid::s4u::ConditionVariable::create();
1175 ((*request)->generalized_funcs)->mutex = simgrid::s4u::Mutex::create();
1179 int Request::grequest_complete(MPI_Request request)
1181 if ((!(request->flags_ & MPI_REQ_GENERALIZED)) || request->generalized_funcs->mutex==NULL)
1182 return MPI_ERR_REQUEST;
1183 request->generalized_funcs->mutex->lock();
1184 request->flags_ |= MPI_REQ_COMPLETE; // in case wait would be called after complete
1185 request->generalized_funcs->cond->notify_one();
1186 request->generalized_funcs->mutex->unlock();
1190 void Request::set_nbc_requests(MPI_Request* reqs, int size){
1191 nbc_requests_size_ = size;
1193 nbc_requests_ = reqs;
1196 nbc_requests_ = nullptr;
1200 int Request::get_nbc_requests_size() const
1202 return nbc_requests_size_;
1205 MPI_Request* Request::get_nbc_requests() const
1207 return nbc_requests_;