1 /* Copyright (c) 2007-2021. 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"
23 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_request, smpi, "Logging specific to SMPI (request)");
25 static simgrid::config::Flag<double> smpi_iprobe_sleep(
26 "smpi/iprobe", "Minimum time to inject inside a call to MPI_Iprobe", 1e-4);
27 static simgrid::config::Flag<double> smpi_test_sleep(
28 "smpi/test", "Minimum time to inject inside a call to MPI_Test", 1e-4);
30 std::vector<s_smpi_factor_t> smpi_ois_values;
32 extern void (*smpi_comm_copy_data_callback)(simgrid::kernel::activity::CommImpl*, void*, size_t);
37 Request::Request(const void* buf, int count, MPI_Datatype datatype, int src, int dst, int tag, MPI_Comm comm,
38 unsigned flags, MPI_Op op)
39 : buf_(const_cast<void*>(buf))
41 , size_(datatype->size() * count)
51 if(op != MPI_REPLACE && op != MPI_OP_NULL)
55 detached_sender_ = nullptr;
60 if (flags & MPI_REQ_PERSISTENT)
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);
86 Comm::unref((*request)->comm_);
87 Datatype::unref((*request)->old_type_);
89 if ((*request)->op_!=MPI_REPLACE && (*request)->op_!=MPI_OP_NULL)
90 Op::unref(&(*request)->op_);
92 (*request)->print_request("Destroying");
94 *request = MPI_REQUEST_NULL;
96 (*request)->print_request("Decrementing");
99 xbt_die("freeing an already free request");
103 bool Request::match_common(MPI_Request req, MPI_Request sender, MPI_Request receiver)
105 xbt_assert(sender, "Cannot match against null sender");
106 xbt_assert(receiver, "Cannot match against null receiver");
107 XBT_DEBUG("Trying to match %s of sender src %d against %d, tag %d against %d, id %d against %d",
108 (req == receiver ? "send" : "recv"), sender->src_, receiver->src_, sender->tag_, receiver->tag_,
109 sender->comm_->id(), receiver->comm_->id());
111 if ((receiver->comm_->id() == MPI_UNDEFINED || sender->comm_->id() == MPI_UNDEFINED ||
112 receiver->comm_->id() == sender->comm_->id()) &&
113 ((receiver->src_ == MPI_ANY_SOURCE && (receiver->comm_->group()->rank(sender->src_) != MPI_UNDEFINED)) ||
114 receiver->src_ == sender->src_) &&
115 ((receiver->tag_ == MPI_ANY_TAG && sender->tag_ >= 0) || receiver->tag_ == sender->tag_)) {
116 // we match, we can transfer some values
117 if (receiver->src_ == MPI_ANY_SOURCE)
118 receiver->real_src_ = sender->src_;
119 if (receiver->tag_ == MPI_ANY_TAG)
120 receiver->real_tag_ = sender->tag_;
121 if (receiver->real_size_ < sender->real_size_){
122 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 auto ref = static_cast<MPI_Request>(a);
157 auto 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 auto ref = static_cast<MPI_Request>(a);
164 auto 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 std::array<MPI_Request, 2> requests;
341 std::array<MPI_Status, 2> stats;
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.data());
356 waitall(2, requests.data(), stats.data());
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 // we make a copy here, as the size is modified by simix, and we may reuse the request in another receive later
381 if ((flags_ & MPI_REQ_RECV) != 0) {
382 this->print_request("New recv");
384 simgrid::smpi::ActorExt* process = smpi_process_remote(simgrid::s4u::Actor::by_pid(dst_));
386 simgrid::s4u::MutexPtr mut = process->mailboxes_mutex();
387 if (smpi_cfg_async_small_thresh() != 0 || (flags_ & MPI_REQ_RMA) != 0)
390 if (smpi_cfg_async_small_thresh() == 0 && (flags_ & MPI_REQ_RMA) == 0) {
391 mailbox = process->mailbox();
392 } else if (((flags_ & MPI_REQ_RMA) != 0) || static_cast<int>(size_) < smpi_cfg_async_small_thresh()) {
393 //We have to check both mailboxes (because SSEND messages are sent to the large mbox).
394 //begin with the more appropriate one : the small one.
395 mailbox = process->mailbox_small();
396 XBT_DEBUG("Is there a corresponding send already posted in the small mailbox %s (in case of SSEND)?",
397 mailbox->get_cname());
398 simgrid::kernel::activity::ActivityImplPtr action = mailbox->iprobe(0, &match_recv, static_cast<void*>(this));
400 if (action == nullptr) {
401 mailbox = process->mailbox();
402 XBT_DEBUG("No, nothing in the small mailbox test the other one : %s", mailbox->get_cname());
403 action = mailbox->iprobe(0, &match_recv, static_cast<void*>(this));
404 if (action == nullptr) {
405 XBT_DEBUG("Still nothing, switch back to the small mailbox : %s", mailbox->get_cname());
406 mailbox = process->mailbox_small();
409 XBT_DEBUG("yes there was something for us in the large mailbox");
412 mailbox = process->mailbox_small();
413 XBT_DEBUG("Is there a corresponding send already posted the small mailbox?");
414 simgrid::kernel::activity::ActivityImplPtr action = mailbox->iprobe(0, &match_recv, static_cast<void*>(this));
416 if (action == nullptr) {
417 XBT_DEBUG("No, nothing in the permanent receive mailbox");
418 mailbox = process->mailbox();
420 XBT_DEBUG("yes there was something for us in the small mailbox");
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 size_t payload_size_ = size_ + 16;//MPI enveloppe size (tag+dest+communicator)
515 action_ = simcall_comm_isend(
516 simgrid::s4u::Actor::by_pid(src_)->get_impl(), mailbox->get_impl(), payload_size_, -1.0, buf, real_size_, &match_send,
517 &xbt_free_f, // how to free the userdata if a detached send fails
518 process->replaying() ? &smpi_comm_null_copy_buffer_callback : smpi_comm_copy_data_callback, this,
519 // detach if msg size < eager/rdv switch limit
521 XBT_DEBUG("send simcall posted");
523 /* FIXME: detached sends are not traceable (action_ == nullptr) */
524 if (action_ != nullptr) {
525 boost::static_pointer_cast<kernel::activity::CommImpl>(action_)->set_tracing_category(
526 smpi_process()->get_tracing_category());
529 if (smpi_cfg_async_small_thresh() != 0 || ((flags_ & MPI_REQ_RMA) != 0))
534 void Request::startall(int count, MPI_Request * requests)
536 if(requests== nullptr)
539 for(int i = 0; i < count; i++) {
540 requests[i]->start();
544 void Request::cancel()
548 if (this->action_ != nullptr)
549 (boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(this->action_))->cancel();
552 int Request::test(MPI_Request * request, MPI_Status * status, int* flag) {
553 // assume that *request is not MPI_REQUEST_NULL (filtered in PMPI_Test or testall before)
554 // to avoid deadlocks if used as a break condition, such as
555 // while (MPI_Test(request, flag, status) && flag) dostuff...
556 // because the time will not normally advance when only calls to MPI_Test are made -> deadlock
557 // multiplier to the sleeptime, to increase speed of execution, each failed test will increase it
558 xbt_assert(*request != MPI_REQUEST_NULL);
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)->flags_ & MPI_REQ_GENERALIZED) && !((*request)->flags_ & MPI_REQ_COMPLETE))
592 finish_wait(request, status); // may invalidate *request
593 if (*request != MPI_REQUEST_NULL && ((*request)->flags_ & MPI_REQ_GENERALIZED)){
594 MPI_Status tmp_status;
595 MPI_Status* mystatus;
596 if (status == MPI_STATUS_IGNORE) {
597 mystatus = &tmp_status;
598 Status::empty(mystatus);
602 ret = ((*request)->generalized_funcs)->query_fn(((*request)->generalized_funcs)->extra_state, mystatus);
604 nsleeps=1;//reset the number of sleeps we will do next time
605 if (*request != MPI_REQUEST_NULL && ((*request)->flags_ & MPI_REQ_PERSISTENT) == 0)
606 *request = MPI_REQUEST_NULL;
607 } else if (smpi_cfg_grow_injected_times()) {
614 int Request::testsome(int incount, MPI_Request requests[], int *count, int *indices, MPI_Status status[])
620 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
623 for (int i = 0; i < incount; i++) {
624 if (requests[i] != MPI_REQUEST_NULL && not (requests[i]->flags_ & MPI_REQ_FINISHED)) {
625 int ret = test(&requests[i], pstat, &flag);
630 if (status != MPI_STATUSES_IGNORE)
631 status[*count] = *pstat;
633 if ((requests[i] != MPI_REQUEST_NULL) && (requests[i]->flags_ & MPI_REQ_NON_PERSISTENT))
634 requests[i] = MPI_REQUEST_NULL;
640 if(count_dead==incount)*count=MPI_UNDEFINED;
642 return MPI_ERR_IN_STATUS;
647 int Request::testany(int count, MPI_Request requests[], int *index, int* flag, MPI_Status * status)
649 std::vector<simgrid::kernel::activity::CommImpl*> comms;
650 comms.reserve(count);
654 int ret = MPI_SUCCESS;
655 *index = MPI_UNDEFINED;
657 std::vector<int> map; /** Maps all matching comms back to their location in requests **/
658 for(i = 0; i < count; i++) {
659 if ((requests[i] != MPI_REQUEST_NULL) && requests[i]->action_ && not(requests[i]->flags_ & MPI_REQ_PREPARED)) {
660 comms.push_back(static_cast<simgrid::kernel::activity::CommImpl*>(requests[i]->action_.get()));
664 if (not map.empty()) {
665 //multiplier to the sleeptime, to increase speed of execution, each failed testany will increase it
666 static int nsleeps = 1;
667 if(smpi_test_sleep > 0)
668 simgrid::s4u::this_actor::sleep_for(nsleeps * smpi_test_sleep);
670 i = simcall_comm_testany(comms.data(), comms.size()); // The i-th element in comms matches!
671 } catch (const Exception&) {
672 XBT_DEBUG("Exception in testany");
676 if (i != -1) { // -1 is not MPI_UNDEFINED but a SIMIX return code. (nothing matches)
678 if (requests[*index] != MPI_REQUEST_NULL &&
679 (requests[*index]->flags_ & MPI_REQ_GENERALIZED)
680 && !(requests[*index]->flags_ & MPI_REQ_COMPLETE)) {
683 finish_wait(&requests[*index],status);
684 if (requests[*index] != MPI_REQUEST_NULL && (requests[*index]->flags_ & MPI_REQ_GENERALIZED)){
685 MPI_Status tmp_status;
686 MPI_Status* mystatus;
687 if (status == MPI_STATUS_IGNORE) {
688 mystatus = &tmp_status;
689 Status::empty(mystatus);
693 ret=(requests[*index]->generalized_funcs)->query_fn((requests[*index]->generalized_funcs)->extra_state, mystatus);
696 if (requests[*index] != MPI_REQUEST_NULL && (requests[*index]->flags_ & MPI_REQ_NON_PERSISTENT))
697 requests[*index] = MPI_REQUEST_NULL;
698 XBT_DEBUG("Testany - returning with index %d", *index);
706 XBT_DEBUG("Testany on inactive handles, returning flag=1 but empty status");
707 //all requests are null or inactive, return true
709 *index = MPI_UNDEFINED;
710 Status::empty(status);
716 int Request::testall(int count, MPI_Request requests[], int* outflag, MPI_Status status[])
719 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
723 for(int i=0; i<count; i++){
724 if (requests[i] != MPI_REQUEST_NULL && not(requests[i]->flags_ & MPI_REQ_PREPARED)) {
725 int ret = test(&requests[i], pstat, &flag);
728 requests[i]=MPI_REQUEST_NULL;
732 if (ret != MPI_SUCCESS)
735 Status::empty(pstat);
737 if(status != MPI_STATUSES_IGNORE) {
742 return MPI_ERR_IN_STATUS;
747 void Request::probe(int source, int tag, MPI_Comm comm, MPI_Status* status){
749 //FIXME find another way to avoid busy waiting ?
750 // the issue here is that we have to wait on a nonexistent comm
752 iprobe(source, tag, comm, &flag, status);
753 XBT_DEBUG("Busy Waiting on probing : %d", flag);
757 void Request::iprobe(int source, int tag, MPI_Comm comm, int* flag, MPI_Status* status){
758 // to avoid deadlock, we have to sleep some time here, or the timer won't advance and we will only do iprobe simcalls
759 // especially when used as a break condition, such as while (MPI_Iprobe(...)) dostuff...
760 // nsleeps is a multiplier to the sleeptime, to increase speed of execution, each failed iprobe will increase it
761 // This can speed up the execution of certain applications by an order of magnitude, such as HPL
762 static int nsleeps = 1;
763 double speed = s4u::this_actor::get_host()->get_speed();
764 double maxrate = smpi_cfg_iprobe_cpu_usage();
765 auto request = new Request(nullptr, 0, MPI_CHAR,
766 source == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : comm->group()->actor(source)->get_pid(),
767 simgrid::s4u::this_actor::get_pid(), tag, comm, MPI_REQ_PERSISTENT | MPI_REQ_RECV);
768 if (smpi_iprobe_sleep > 0) {
769 /** Compute the number of flops we will sleep **/
770 s4u::this_actor::exec_init(/*nsleeps: See comment above */ nsleeps *
771 /*(seconds * flop/s -> total flops)*/ smpi_iprobe_sleep * speed * maxrate)
773 /* Not the entire CPU can be used when iprobing: This is important for
774 * the energy consumption caused by polling with iprobes.
775 * Note also that the number of flops that was
776 * computed above contains a maxrate factor and is hence reduced (maxrate < 1)
778 ->set_bound(maxrate*speed)
782 // behave like a receive, but don't do it
783 s4u::Mailbox* mailbox;
785 request->print_request("New iprobe");
786 // We have to test both mailboxes as we don't know if we will receive one or another
787 if (smpi_cfg_async_small_thresh() > 0) {
788 mailbox = smpi_process()->mailbox_small();
789 XBT_DEBUG("Trying to probe the perm recv mailbox");
790 request->action_ = mailbox->iprobe(0, &match_recv, static_cast<void*>(request));
793 if (request->action_ == nullptr){
794 mailbox = smpi_process()->mailbox();
795 XBT_DEBUG("trying to probe the other mailbox");
796 request->action_ = mailbox->iprobe(0, &match_recv, static_cast<void*>(request));
799 if (request->action_ != nullptr){
800 kernel::activity::CommImplPtr sync_comm = boost::static_pointer_cast<kernel::activity::CommImpl>(request->action_);
801 const Request* req = static_cast<MPI_Request>(sync_comm->src_data_);
803 if (status != MPI_STATUS_IGNORE && (req->flags_ & MPI_REQ_PREPARED) == 0) {
804 status->MPI_SOURCE = comm->group()->rank(req->src_);
805 status->MPI_TAG = req->tag_;
806 status->MPI_ERROR = MPI_SUCCESS;
807 status->count = req->real_size_;
809 nsleeps = 1;//reset the number of sleeps we will do next time
813 if (smpi_cfg_grow_injected_times())
817 xbt_assert(request == MPI_REQUEST_NULL);
820 void Request::finish_wait(MPI_Request* request, MPI_Status * status)
822 MPI_Request req = *request;
823 Status::empty(status);
825 if (req->cancelled_==1){
826 if (status!=MPI_STATUS_IGNORE)
828 if(req->detached_sender_ != nullptr)
829 unref(&(req->detached_sender_));
834 if ((req->flags_ & (MPI_REQ_PREPARED | MPI_REQ_GENERALIZED | MPI_REQ_FINISHED)) == 0) {
835 if(status != MPI_STATUS_IGNORE) {
836 int src = req->src_ == MPI_ANY_SOURCE ? req->real_src_ : req->src_;
837 status->MPI_SOURCE = req->comm_->group()->rank(src);
838 status->MPI_TAG = req->tag_ == MPI_ANY_TAG ? req->real_tag_ : req->tag_;
839 status->MPI_ERROR = req->truncated_ ? MPI_ERR_TRUNCATE : MPI_SUCCESS;
840 // this handles the case were size in receive differs from size in send
841 status->count = req->real_size_;
843 //detached send will be finished at the other end
844 if (not(req->detached_ && ((req->flags_ & MPI_REQ_SEND) != 0))) {
845 req->print_request("Finishing");
846 MPI_Datatype datatype = req->old_type_;
848 // FIXME Handle the case of a partial shared malloc.
849 if (((req->flags_ & MPI_REQ_ACCUMULATE) != 0) ||
850 (datatype->flags() & DT_FLAG_DERIVED)) { // && (not smpi_is_shared(req->old_buf_))){
851 if (not smpi_process()->replaying() && smpi_cfg_privatization() != SmpiPrivStrategies::NONE &&
852 static_cast<char*>(req->old_buf_) >= smpi_data_exe_start &&
853 static_cast<char*>(req->old_buf_) < smpi_data_exe_start + smpi_data_exe_size) {
854 XBT_VERB("Privatization : We are unserializing to a zone in global memory Switch data segment ");
855 smpi_switch_data_segment(simgrid::s4u::Actor::self());
858 if(datatype->flags() & DT_FLAG_DERIVED){
859 // This part handles the problem of non-contiguous memory the unserialization at the reception
860 if ((req->flags_ & MPI_REQ_RECV) && datatype->size() != 0)
861 datatype->unserialize(req->buf_, req->old_buf_, req->real_size_/datatype->size() , req->op_);
864 } else if (req->flags_ & MPI_REQ_RECV) { // apply op on contiguous buffer for accumulate
865 if (datatype->size() != 0) {
866 int n = req->real_size_ / datatype->size();
867 req->op_->apply(req->buf_, req->old_buf_, &n, datatype);
876 if (TRACE_smpi_view_internals() && ((req->flags_ & MPI_REQ_RECV) != 0)) {
877 int rank = simgrid::s4u::this_actor::get_pid();
878 int src_traced = (req->src_ == MPI_ANY_SOURCE ? req->real_src_ : req->src_);
879 TRACE_smpi_recv(src_traced, rank,req->tag_);
881 if(req->detached_sender_ != nullptr){
882 //integrate pseudo-timing for buffering of small messages, do not bother to execute the simcall if 0
884 simgrid::s4u::Actor::self()->get_host()->extension<simgrid::smpi::Host>()->orecv(req->real_size());
885 if (sleeptime > 0.0) {
886 simgrid::s4u::this_actor::sleep_for(sleeptime);
887 XBT_DEBUG("receiving size of %zu : sleep %f ", req->real_size_, sleeptime);
889 unref(&(req->detached_sender_));
891 if (req->flags_ & MPI_REQ_PERSISTENT)
892 req->action_ = nullptr;
893 req->flags_ |= MPI_REQ_FINISHED;
895 if (req->truncated_) {
896 char error_string[MPI_MAX_ERROR_STRING];
898 PMPI_Error_string(MPI_ERR_TRUNCATE, error_string, &error_size);
899 MPI_Errhandler err = (req->comm_) ? (req->comm_)->errhandler() : MPI_ERRHANDLER_NULL;
900 if (err == MPI_ERRHANDLER_NULL || err == MPI_ERRORS_RETURN)
901 XBT_WARN("recv - returned %.*s instead of MPI_SUCCESS", error_size, error_string);
902 else if (err == MPI_ERRORS_ARE_FATAL)
903 xbt_die("recv - returned %.*s instead of MPI_SUCCESS", error_size, error_string);
905 err->call((req->comm_), MPI_ERR_TRUNCATE);
906 if (err != MPI_ERRHANDLER_NULL)
907 simgrid::smpi::Errhandler::unref(err);
908 MC_assert(not MC_is_active()); /* Only fail in MC mode */
914 int Request::wait(MPI_Request * request, MPI_Status * status)
916 // assume that *request is not MPI_REQUEST_NULL (filtered in PMPI_Wait before)
917 xbt_assert(*request != MPI_REQUEST_NULL);
920 // Are we waiting on a request meant for non blocking collectives ?
921 // If so, wait for all the subrequests.
922 if ((*request)->nbc_requests_size_>0){
923 ret = waitall((*request)->nbc_requests_size_, (*request)->nbc_requests_, MPI_STATUSES_IGNORE);
924 for (int i = 0; i < (*request)->nbc_requests_size_; i++) {
925 if((*request)->buf_!=nullptr && (*request)->nbc_requests_[i]!=MPI_REQUEST_NULL){//reduce case
926 void * buf=(*request)->nbc_requests_[i]->buf_;
927 if((*request)->old_type_->flags() & DT_FLAG_DERIVED)
928 buf=(*request)->nbc_requests_[i]->old_buf_;
929 if((*request)->nbc_requests_[i]->flags_ & MPI_REQ_RECV ){
930 if((*request)->op_!=MPI_OP_NULL){
931 int count=(*request)->size_/ (*request)->old_type_->size();
932 (*request)->op_->apply(buf, (*request)->buf_, &count, (*request)->old_type_);
934 smpi_free_tmp_buffer(static_cast<unsigned char*>(buf));
937 if((*request)->nbc_requests_[i]!=MPI_REQUEST_NULL)
938 Request::unref(&((*request)->nbc_requests_[i]));
940 delete[] (*request)->nbc_requests_;
941 (*request)->nbc_requests_size_=0;
943 (*request)=MPI_REQUEST_NULL;
947 (*request)->print_request("Waiting");
948 if ((*request)->flags_ & (MPI_REQ_PREPARED | MPI_REQ_FINISHED)) {
949 Status::empty(status);
953 if ((*request)->action_ != nullptr){
955 // this is not a detached send
956 simcall_comm_wait((*request)->action_.get(), -1.0);
957 } catch (const Exception&) {
958 XBT_VERB("Request cancelled");
962 if ((*request)->flags_ & MPI_REQ_GENERALIZED) {
963 if(!((*request)->flags_ & MPI_REQ_COMPLETE)){
964 ((*request)->generalized_funcs)->mutex->lock();
965 ((*request)->generalized_funcs)->cond->wait(((*request)->generalized_funcs)->mutex);
966 ((*request)->generalized_funcs)->mutex->unlock();
968 MPI_Status tmp_status;
969 MPI_Status* mystatus;
970 if (status == MPI_STATUS_IGNORE) {
971 mystatus = &tmp_status;
972 Status::empty(mystatus);
976 ret = ((*request)->generalized_funcs)->query_fn(((*request)->generalized_funcs)->extra_state, mystatus);
979 finish_wait(request, status); // may invalidate *request
980 if (*request != MPI_REQUEST_NULL && (((*request)->flags_ & MPI_REQ_NON_PERSISTENT) != 0))
981 *request = MPI_REQUEST_NULL;
985 int Request::waitany(int count, MPI_Request requests[], MPI_Status * status)
987 int index = MPI_UNDEFINED;
990 // Wait for a request to complete
991 std::vector<simgrid::kernel::activity::CommImpl*> comms;
992 std::vector<int> map;
993 XBT_DEBUG("Wait for one of %d", count);
994 for(int i = 0; i < count; i++) {
995 if (requests[i] != MPI_REQUEST_NULL && not(requests[i]->flags_ & MPI_REQ_PREPARED) &&
996 not(requests[i]->flags_ & MPI_REQ_FINISHED)) {
997 if (requests[i]->action_ != nullptr) {
998 XBT_DEBUG("Waiting any %p ", requests[i]);
999 comms.push_back(static_cast<simgrid::kernel::activity::CommImpl*>(requests[i]->action_.get()));
1002 // This is a finished detached request, let's return this one
1003 comms.clear(); // don't do the waitany call afterwards
1005 finish_wait(&requests[i], status); // cleanup if refcount = 0
1006 if (requests[i] != MPI_REQUEST_NULL && (requests[i]->flags_ & MPI_REQ_NON_PERSISTENT))
1007 requests[i] = MPI_REQUEST_NULL; // set to null
1012 if (not comms.empty()) {
1013 XBT_DEBUG("Enter waitany for %zu comms", comms.size());
1016 i = simcall_comm_waitany(comms.data(), comms.size(), -1);
1017 } catch (const Exception&) {
1018 XBT_INFO("request cancelled");
1022 // not MPI_UNDEFINED, as this is a simix return code
1025 //in case of an accumulate, we have to wait the end of all requests to apply the operation, ordered correctly.
1026 if ((requests[index] == MPI_REQUEST_NULL) ||
1027 (not((requests[index]->flags_ & MPI_REQ_ACCUMULATE) && (requests[index]->flags_ & MPI_REQ_RECV)))) {
1028 finish_wait(&requests[index],status);
1029 if (requests[index] != MPI_REQUEST_NULL && (requests[index]->flags_ & MPI_REQ_NON_PERSISTENT))
1030 requests[index] = MPI_REQUEST_NULL;
1036 if (index==MPI_UNDEFINED)
1037 Status::empty(status);
1042 static int sort_accumulates(const Request* a, const Request* b)
1044 return (a->tag() > b->tag());
1047 int Request::waitall(int count, MPI_Request requests[], MPI_Status status[])
1049 std::vector<MPI_Request> accumulates;
1052 MPI_Status *pstat = (status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat);
1053 int retvalue = MPI_SUCCESS;
1054 //tag invalid requests in the set
1055 if (status != MPI_STATUSES_IGNORE) {
1056 for (int c = 0; c < count; c++) {
1057 if (requests[c] == MPI_REQUEST_NULL || requests[c]->dst_ == MPI_PROC_NULL ||
1058 (requests[c]->flags_ & MPI_REQ_PREPARED)) {
1059 Status::empty(&status[c]);
1060 } else if (requests[c]->src_ == MPI_PROC_NULL) {
1061 Status::empty(&status[c]);
1062 status[c].MPI_SOURCE = MPI_PROC_NULL;
1066 for (int c = 0; c < count; c++) {
1067 if (MC_is_active() || MC_record_replay_is_active()) {
1068 wait(&requests[c],pstat);
1071 index = waitany(count, requests, pstat);
1073 if (index == MPI_UNDEFINED)
1076 if (requests[index] != MPI_REQUEST_NULL && (requests[index]->flags_ & MPI_REQ_RECV) &&
1077 (requests[index]->flags_ & MPI_REQ_ACCUMULATE))
1078 accumulates.push_back(requests[index]);
1079 if (requests[index] != MPI_REQUEST_NULL && (requests[index]->flags_ & MPI_REQ_NON_PERSISTENT))
1080 requests[index] = MPI_REQUEST_NULL;
1082 if (status != MPI_STATUSES_IGNORE) {
1083 status[index] = *pstat;
1084 if (status[index].MPI_ERROR == MPI_ERR_TRUNCATE)
1085 retvalue = MPI_ERR_IN_STATUS;
1089 if (not accumulates.empty()) {
1090 std::sort(accumulates.begin(), accumulates.end(), sort_accumulates);
1091 for (auto& req : accumulates) {
1092 finish_wait(&req, status);
1099 int Request::waitsome(int incount, MPI_Request requests[], int *indices, MPI_Status status[])
1105 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
1106 index = waitany(incount, requests, pstat);
1107 if(index==MPI_UNDEFINED) return MPI_UNDEFINED;
1108 if(status != MPI_STATUSES_IGNORE) {
1109 status[count] = *pstat;
1111 indices[count] = index;
1113 for (int i = 0; i < incount; i++) {
1114 if (i!=index && requests[i] != MPI_REQUEST_NULL
1115 && not(requests[i]->flags_ & MPI_REQ_FINISHED)) {
1116 test(&requests[i], pstat,&flag);
1119 if(status != MPI_STATUSES_IGNORE) {
1120 status[count] = *pstat;
1122 if (requests[i] != MPI_REQUEST_NULL && (requests[i]->flags_ & MPI_REQ_NON_PERSISTENT))
1123 requests[i]=MPI_REQUEST_NULL;
1131 MPI_Request Request::f2c(int id)
1133 if(id==MPI_FORTRAN_REQUEST_NULL)
1134 return MPI_REQUEST_NULL;
1135 return static_cast<MPI_Request>(F2C::lookup()->at(id));
1138 void Request::free_f(int id)
1140 if (id != MPI_FORTRAN_REQUEST_NULL) {
1141 F2C::lookup()->erase(id);
1145 int Request::get_status(const Request* req, int* flag, MPI_Status* status)
1149 if(req != MPI_REQUEST_NULL && req->action_ != nullptr) {
1150 req->iprobe(req->src_, req->tag_, req->comm_, flag, status);
1154 if (req != MPI_REQUEST_NULL &&
1155 (req->flags_ & MPI_REQ_GENERALIZED)
1156 && !(req->flags_ & MPI_REQ_COMPLETE)) {
1162 if(req != MPI_REQUEST_NULL &&
1163 status != MPI_STATUS_IGNORE) {
1164 int src = req->src_ == MPI_ANY_SOURCE ? req->real_src_ : req->src_;
1165 status->MPI_SOURCE = req->comm_->group()->rank(src);
1166 status->MPI_TAG = req->tag_ == MPI_ANY_TAG ? req->real_tag_ : req->tag_;
1167 status->MPI_ERROR = req->truncated_ ? MPI_ERR_TRUNCATE : MPI_SUCCESS;
1168 status->count = req->real_size_;
1173 int Request::grequest_start(MPI_Grequest_query_function* query_fn, MPI_Grequest_free_function* free_fn,
1174 MPI_Grequest_cancel_function* cancel_fn, void* extra_state, MPI_Request* request)
1176 *request = new Request();
1177 (*request)->flags_ |= MPI_REQ_GENERALIZED;
1178 (*request)->flags_ |= MPI_REQ_PERSISTENT;
1179 (*request)->refcount_ = 1;
1180 ((*request)->generalized_funcs) = std::make_unique<smpi_mpi_generalized_request_funcs_t>();
1181 ((*request)->generalized_funcs)->query_fn=query_fn;
1182 ((*request)->generalized_funcs)->free_fn=free_fn;
1183 ((*request)->generalized_funcs)->cancel_fn=cancel_fn;
1184 ((*request)->generalized_funcs)->extra_state=extra_state;
1185 ((*request)->generalized_funcs)->cond = simgrid::s4u::ConditionVariable::create();
1186 ((*request)->generalized_funcs)->mutex = simgrid::s4u::Mutex::create();
1190 int Request::grequest_complete(MPI_Request request)
1192 if ((!(request->flags_ & MPI_REQ_GENERALIZED)) || request->generalized_funcs->mutex == nullptr)
1193 return MPI_ERR_REQUEST;
1194 request->generalized_funcs->mutex->lock();
1195 request->flags_ |= MPI_REQ_COMPLETE; // in case wait would be called after complete
1196 request->generalized_funcs->cond->notify_one();
1197 request->generalized_funcs->mutex->unlock();
1201 void Request::set_nbc_requests(MPI_Request* reqs, int size){
1202 nbc_requests_size_ = size;
1204 nbc_requests_ = reqs;
1207 nbc_requests_ = nullptr;
1211 int Request::get_nbc_requests_size() const
1213 return nbc_requests_size_;
1216 MPI_Request* Request::get_nbc_requests() const
1218 return nbc_requests_;