1 /* Copyright (c) 2007-2022. 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/ConditionVariable.hpp"
12 #include "simgrid/s4u/Exec.hpp"
13 #include "simgrid/s4u/Mutex.hpp"
14 #include "smpi_comm.hpp"
15 #include "smpi_datatype.hpp"
16 #include "smpi_host.hpp"
17 #include "smpi_op.hpp"
18 #include "src/kernel/EngineImpl.hpp"
19 #include "src/kernel/activity/CommImpl.hpp"
20 #include "src/kernel/actor/ActorImpl.hpp"
21 #include "src/kernel/actor/SimcallObserver.hpp"
22 #include "src/mc/mc_replay.hpp"
23 #include "src/smpi/include/smpi_actor.hpp"
28 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_request, smpi, "Logging specific to SMPI (request)");
30 static simgrid::config::Flag<double> smpi_iprobe_sleep(
31 "smpi/iprobe", "Minimum time to inject inside a call to MPI_Iprobe", 1e-4);
32 static simgrid::config::Flag<double> smpi_test_sleep(
33 "smpi/test", "Minimum time to inject inside a call to MPI_Test", 1e-4);
35 std::vector<s_smpi_factor_t> smpi_ois_values;
37 extern std::function<void(simgrid::kernel::activity::CommImpl*, void*, size_t)> smpi_comm_copy_data_callback;
42 Request::Request(const void* buf, int count, MPI_Datatype datatype, aid_t src, aid_t dst, int tag, MPI_Comm comm,
43 unsigned flags, MPI_Op op)
44 : buf_(const_cast<void*>(buf))
47 , size_(datatype->size() * count)
57 if(op != MPI_REPLACE && op != MPI_OP_NULL)
61 detached_sender_ = nullptr;
63 // get src_host if it's available (src is valid)
64 auto src_process = simgrid::s4u::Actor::by_pid(src);
66 src_host_ = src_process->get_host();
68 unmatched_types_ = false;
71 if (flags & MPI_REQ_PERSISTENT)
84 void Request::unref(MPI_Request* request)
86 xbt_assert(*request != MPI_REQUEST_NULL, "freeing an already free request");
88 (*request)->refcount_--;
89 if ((*request)->refcount_ < 0) {
90 (*request)->print_request("wrong refcount");
91 xbt_die("Whoops, wrong refcount");
93 if ((*request)->refcount_ == 0) {
94 if ((*request)->flags_ & MPI_REQ_GENERALIZED) {
95 ((*request)->generalized_funcs)->free_fn(((*request)->generalized_funcs)->extra_state);
97 Comm::unref((*request)->comm_);
98 Datatype::unref((*request)->type_);
100 if ((*request)->op_ != MPI_REPLACE && (*request)->op_ != MPI_OP_NULL)
101 Op::unref(&(*request)->op_);
103 (*request)->print_request("Destroying");
104 F2C::free_f((*request)->f2c_id());
106 *request = MPI_REQUEST_NULL;
108 (*request)->print_request("Decrementing");
112 bool Request::match_types(MPI_Datatype stype, MPI_Datatype rtype){
114 if ((stype == rtype) ||
115 //byte and packed always match with anything
116 (stype == MPI_PACKED || rtype == MPI_PACKED || stype == MPI_BYTE || rtype == MPI_BYTE) ||
117 //complex datatypes - we don't properly match these yet, as it would mean checking each subtype recursively.
118 (stype->flags() & DT_FLAG_DERIVED || rtype->flags() & DT_FLAG_DERIVED) ||
119 //duplicated datatypes, check if underlying is ok
120 (stype->duplicated_datatype()!=MPI_DATATYPE_NULL && match_types(stype->duplicated_datatype(), rtype)) ||
121 (rtype->duplicated_datatype()!=MPI_DATATYPE_NULL && match_types(stype, rtype->duplicated_datatype())))
124 XBT_WARN("Mismatched datatypes : sending %s and receiving %s", stype->name().c_str(), rtype->name().c_str());
129 bool Request::match_common(MPI_Request req, MPI_Request sender, MPI_Request receiver)
131 xbt_assert(sender, "Cannot match against null sender");
132 xbt_assert(receiver, "Cannot match against null receiver");
133 XBT_DEBUG("Trying to match %s of sender src %ld against %ld, tag %d against %d, id %d against %d",
134 (req == receiver ? "send" : "recv"), sender->src_, receiver->src_, sender->tag_, receiver->tag_,
135 sender->comm_->id(), receiver->comm_->id());
137 if ((receiver->comm_->id() == MPI_UNDEFINED || sender->comm_->id() == MPI_UNDEFINED ||
138 receiver->comm_->id() == sender->comm_->id()) &&
139 ((receiver->src_ == MPI_ANY_SOURCE && (receiver->comm_->group()->rank(sender->src_) != MPI_UNDEFINED)) ||
140 receiver->src_ == sender->src_) &&
141 ((receiver->tag_ == MPI_ANY_TAG && sender->tag_ >= 0) || receiver->tag_ == sender->tag_)) {
142 // we match, we can transfer some values
143 if (receiver->src_ == MPI_ANY_SOURCE) {
144 receiver->real_src_ = sender->src_;
145 receiver->src_host_ = sender->src_host_;
147 if (receiver->tag_ == MPI_ANY_TAG)
148 receiver->real_tag_ = sender->tag_;
149 if ((receiver->flags_ & MPI_REQ_PROBE) == 0 && receiver->real_size_ < sender->real_size_) {
150 XBT_DEBUG("Truncating message - should not happen: receiver size : %zu < sender size : %zu", receiver->real_size_,
152 receiver->truncated_ = true;
154 //0-sized datatypes/counts should not interfere and match
155 if ( sender->real_size_ != 0 && receiver->real_size_ != 0 &&
156 !match_types(sender->type_, receiver->type_))
157 receiver->unmatched_types_ = true;
158 if (sender->detached_)
159 receiver->detached_sender_ = sender; // tie the sender to the receiver, as it is detached and has to be freed in
161 req->flags_ |= MPI_REQ_MATCHED; // mark as impossible to cancel anymore
162 XBT_DEBUG("match succeeded");
168 void Request::init_buffer(int count){
169 // FIXME Handle the case of a partial shared malloc.
170 // This part handles the problem of non-contiguous memory (for the unserialization at the reception)
171 if (not smpi_process()->replaying() &&
172 ((((flags_ & MPI_REQ_RECV) != 0) && ((flags_ & MPI_REQ_ACCUMULATE) != 0)) || (type_->flags() & DT_FLAG_DERIVED))) {
173 // This part handles the problem of non-contiguous memory
178 buf_ = xbt_malloc(count*type_->size());
179 if ((type_->flags() & DT_FLAG_DERIVED) && ((flags_ & MPI_REQ_SEND) != 0)) {
180 type_->serialize(old_buf_, buf_, count);
186 bool Request::match_recv(void* a, void* b, simgrid::kernel::activity::CommImpl*)
188 auto ref = static_cast<MPI_Request>(a);
189 auto req = static_cast<MPI_Request>(b);
190 bool match = match_common(req, req, ref);
191 if (not match || ref->comm_ == MPI_COMM_UNINITIALIZED || ref->comm_->is_smp_comm())
194 if (ref->comm_->get_received_messages_count(ref->comm_->group()->rank(req->src_),
195 ref->comm_->group()->rank(req->dst_), req->tag_) == req->message_id_) {
196 if (((ref->flags_ & MPI_REQ_PROBE) == 0) && ((req->flags_ & MPI_REQ_PROBE) == 0)) {
197 XBT_DEBUG("increasing count in comm %p, which was %u from pid %ld, to pid %ld with tag %d", ref->comm_,
198 ref->comm_->get_received_messages_count(ref->comm_->group()->rank(req->src_),
199 ref->comm_->group()->rank(req->dst_), req->tag_),
200 req->src_, req->dst_, req->tag_);
201 ref->comm_->increment_received_messages_count(ref->comm_->group()->rank(req->src_),
202 ref->comm_->group()->rank(req->dst_), req->tag_);
203 if (ref->real_size_ > req->real_size_) {
204 ref->real_size_ = req->real_size_;
209 req->flags_ &= ~MPI_REQ_MATCHED;
210 ref->detached_sender_ = nullptr;
211 XBT_DEBUG("Refusing to match message, as its ID is not the one I expect. in comm %p, %u != %u, "
212 "from pid %ld to pid %ld, with tag %d",
214 ref->comm_->get_received_messages_count(ref->comm_->group()->rank(req->src_),
215 ref->comm_->group()->rank(req->dst_), req->tag_),
216 req->message_id_, req->src_, req->dst_, req->tag_);
221 bool Request::match_send(void* a, void* b, simgrid::kernel::activity::CommImpl*)
223 auto ref = static_cast<MPI_Request>(a);
224 auto req = static_cast<MPI_Request>(b);
225 return match_common(req, ref, req);
228 void Request::print_request(const char* message) const
230 XBT_VERB("%s request %p [buf = %p, size = %zu, src = %ld, dst = %ld, tag = %d, flags = %x]", message, this, buf_,
231 size_, src_, dst_, tag_, flags_);
234 /* factories, to hide the internal flags from the caller */
235 MPI_Request Request::bsend_init(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
237 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
238 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
239 MPI_REQ_PERSISTENT | MPI_REQ_SEND | MPI_REQ_PREPARED | MPI_REQ_BSEND);
242 MPI_Request Request::send_init(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
244 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
245 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
246 MPI_REQ_PERSISTENT | MPI_REQ_SEND | MPI_REQ_PREPARED);
249 MPI_Request Request::ssend_init(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
251 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
252 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
253 MPI_REQ_PERSISTENT | MPI_REQ_SSEND | MPI_REQ_SEND | MPI_REQ_PREPARED);
256 MPI_Request Request::isend_init(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
258 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
259 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
260 MPI_REQ_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SEND | MPI_REQ_PREPARED);
263 MPI_Request Request::rma_send_init(const void *buf, int count, MPI_Datatype datatype, int src, int dst, int tag, MPI_Comm comm,
268 request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, comm->group()->actor(src),
269 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
270 MPI_REQ_RMA | MPI_REQ_NON_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SEND | MPI_REQ_PREPARED);
272 request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, comm->group()->actor(src),
273 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
274 MPI_REQ_RMA | MPI_REQ_NON_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SEND | MPI_REQ_PREPARED |
281 MPI_Request Request::recv_init(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm)
283 aid_t source = MPI_PROC_NULL;
284 if (src == MPI_ANY_SOURCE)
285 source = MPI_ANY_SOURCE;
286 else if (src != MPI_PROC_NULL)
287 source = comm->group()->actor(src);
288 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype,
290 simgrid::s4u::this_actor::get_pid(), tag, comm,
291 MPI_REQ_PERSISTENT | MPI_REQ_RECV | MPI_REQ_PREPARED);
294 MPI_Request Request::rma_recv_init(void *buf, int count, MPI_Datatype datatype, int src, int dst, int tag, MPI_Comm comm,
297 aid_t source = MPI_PROC_NULL;
298 if (src == MPI_ANY_SOURCE)
299 source = MPI_ANY_SOURCE;
300 else if (src != MPI_PROC_NULL)
301 source = comm->group()->actor(src);
304 request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, source,
305 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
306 MPI_REQ_RMA | MPI_REQ_NON_PERSISTENT | MPI_REQ_RECV | MPI_REQ_PREPARED);
309 new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, source,
310 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
311 MPI_REQ_RMA | MPI_REQ_NON_PERSISTENT | MPI_REQ_RECV | MPI_REQ_PREPARED | MPI_REQ_ACCUMULATE, op);
316 MPI_Request Request::irecv_init(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm)
318 aid_t source = MPI_PROC_NULL;
319 if (src == MPI_ANY_SOURCE)
320 source = MPI_ANY_SOURCE;
321 else if (src != MPI_PROC_NULL)
322 source = comm->group()->actor(src);
323 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype,
324 source, simgrid::s4u::this_actor::get_pid(), tag, comm,
325 MPI_REQ_PERSISTENT | MPI_REQ_RECV | MPI_REQ_PREPARED);
328 MPI_Request Request::ibsend(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
330 auto request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
331 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
332 MPI_REQ_NON_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SEND | MPI_REQ_BSEND);
333 if(dst != MPI_PROC_NULL)
338 MPI_Request Request::isend(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
340 auto request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
341 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
342 MPI_REQ_NON_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SEND);
343 if(dst != MPI_PROC_NULL)
348 MPI_Request Request::issend(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
350 auto request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
351 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
352 MPI_REQ_NON_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SSEND | MPI_REQ_SEND);
353 if(dst != MPI_PROC_NULL)
358 MPI_Request Request::irecv(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm)
360 aid_t source = MPI_PROC_NULL;
361 if (src == MPI_ANY_SOURCE)
362 source = MPI_ANY_SOURCE;
363 else if (src != MPI_PROC_NULL)
364 source = comm->group()->actor(src);
365 auto request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, source,
366 simgrid::s4u::this_actor::get_pid(), tag, comm, MPI_REQ_NON_PERSISTENT | MPI_REQ_RECV);
367 if(src != MPI_PROC_NULL)
372 int Request::recv(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm, MPI_Status * status)
374 MPI_Request request = irecv(buf, count, datatype, src, tag, comm);
375 int retval = wait(&request,status);
380 void Request::bsend(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
382 auto request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
383 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
384 MPI_REQ_NON_PERSISTENT | MPI_REQ_SEND | MPI_REQ_BSEND);
386 if(dst != MPI_PROC_NULL)
388 wait(&request, MPI_STATUS_IGNORE);
392 void Request::send(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
394 auto request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
395 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
396 MPI_REQ_NON_PERSISTENT | MPI_REQ_SEND);
397 if(dst != MPI_PROC_NULL)
399 wait(&request, MPI_STATUS_IGNORE);
403 void Request::ssend(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
405 auto request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
406 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
407 MPI_REQ_NON_PERSISTENT | MPI_REQ_SSEND | MPI_REQ_SEND);
409 if(dst != MPI_PROC_NULL)
411 wait(&request,MPI_STATUS_IGNORE);
415 void Request::sendrecv(const void *sendbuf, int sendcount, MPI_Datatype sendtype,int dst, int sendtag,
416 void *recvbuf, int recvcount, MPI_Datatype recvtype, int src, int recvtag,
417 MPI_Comm comm, MPI_Status * status)
419 aid_t source = MPI_PROC_NULL;
420 if (src == MPI_ANY_SOURCE)
421 source = MPI_ANY_SOURCE;
422 else if (src != MPI_PROC_NULL)
423 source = comm->group()->actor(src);
424 aid_t destination = dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL;
426 std::array<MPI_Request, 2> requests;
427 std::array<MPI_Status, 2> stats;
428 aid_t myid = simgrid::s4u::this_actor::get_pid();
429 if ((destination == myid) && (source == myid)) {
430 Datatype::copy(sendbuf, sendcount, sendtype, recvbuf, recvcount, recvtype);
431 if (status != MPI_STATUS_IGNORE) {
432 status->MPI_SOURCE = source;
433 status->MPI_TAG = recvtag;
434 status->MPI_ERROR = MPI_SUCCESS;
435 status->count = sendcount * sendtype->size();
439 requests[0] = isend_init(sendbuf, sendcount, sendtype, dst, sendtag, comm);
440 requests[1] = irecv_init(recvbuf, recvcount, recvtype, src, recvtag, comm);
441 startall(2, requests.data());
442 waitall(2, requests.data(), stats.data());
445 if(status != MPI_STATUS_IGNORE) {
446 // Copy receive status
451 void Request::start()
453 s4u::Mailbox* mailbox;
455 xbt_assert(action_ == nullptr, "Cannot (re-)start unfinished communication");
456 //reinitialize temporary buffer for persistent requests
457 if(real_size_ > 0 && flags_ & MPI_REQ_FINISHED){
459 init_buffer(real_size_/type_->size());
461 flags_ &= ~MPI_REQ_PREPARED;
462 flags_ &= ~MPI_REQ_FINISHED;
465 // we make a copy here, as the size is modified by simix, and we may reuse the request in another receive later
467 if ((flags_ & MPI_REQ_RECV) != 0) {
468 this->print_request("New recv");
470 simgrid::smpi::ActorExt* process = smpi_process_remote(simgrid::s4u::Actor::by_pid(dst_));
472 simgrid::s4u::MutexPtr mut = process->mailboxes_mutex();
473 if (smpi_cfg_async_small_thresh() != 0 || (flags_ & MPI_REQ_RMA) != 0)
476 bool is_probe = ((flags_ & MPI_REQ_PROBE) != 0);
477 flags_ |= MPI_REQ_PROBE;
479 if (smpi_cfg_async_small_thresh() == 0 && (flags_ & MPI_REQ_RMA) == 0) {
480 mailbox = process->mailbox();
481 } else if (((flags_ & MPI_REQ_RMA) != 0) || static_cast<int>(size_) < smpi_cfg_async_small_thresh()) {
482 //We have to check both mailboxes (because SSEND messages are sent to the large mbox).
483 //begin with the more appropriate one : the small one.
484 mailbox = process->mailbox_small();
485 XBT_DEBUG("Is there a corresponding send already posted in the small mailbox %s (in case of SSEND)?",
486 mailbox->get_cname());
487 simgrid::kernel::activity::ActivityImplPtr action = mailbox->iprobe(0, &match_recv, static_cast<void*>(this));
489 if (action == nullptr) {
490 mailbox = process->mailbox();
491 XBT_DEBUG("No, nothing in the small mailbox test the other one : %s", mailbox->get_cname());
492 action = mailbox->iprobe(0, &match_recv, static_cast<void*>(this));
493 if (action == nullptr) {
494 XBT_DEBUG("Still nothing, switch back to the small mailbox : %s", mailbox->get_cname());
495 mailbox = process->mailbox_small();
498 XBT_DEBUG("yes there was something for us in the small mailbox");
501 mailbox = process->mailbox_small();
502 XBT_DEBUG("Is there a corresponding send already posted the small mailbox?");
503 simgrid::kernel::activity::ActivityImplPtr action = mailbox->iprobe(0, &match_recv, static_cast<void*>(this));
505 if (action == nullptr) {
506 XBT_DEBUG("No, nothing in the permanent receive mailbox");
507 mailbox = process->mailbox();
509 XBT_DEBUG("yes there was something for us in the small mailbox");
513 flags_ &= ~MPI_REQ_PROBE;
514 kernel::actor::CommIrecvSimcall observer{process->get_actor()->get_impl(),
516 static_cast<unsigned char*>(buf_),
519 process->replaying() ? &smpi_comm_null_copy_buffer_callback
520 : smpi_comm_copy_data_callback,
523 observer.set_tag(tag_);
525 action_ = kernel::actor::simcall_answered([&observer] { return kernel::activity::CommImpl::irecv(&observer); },
528 XBT_DEBUG("recv simcall posted");
530 if (smpi_cfg_async_small_thresh() != 0 || (flags_ & MPI_REQ_RMA) != 0)
532 } else { /* the RECV flag was not set, so this is a send */
533 const simgrid::smpi::ActorExt* process = smpi_process_remote(simgrid::s4u::Actor::by_pid(dst_));
534 xbt_assert(process, "Actor pid=%ld is gone??", dst_);
535 if (TRACE_smpi_view_internals())
536 TRACE_smpi_send(src_, src_, dst_, tag_, size_);
537 this->print_request("New send");
539 message_id_=comm_->get_sent_messages_count(comm_->group()->rank(src_), comm_->group()->rank(dst_), tag_);
540 comm_->increment_sent_messages_count(comm_->group()->rank(src_), comm_->group()->rank(dst_), tag_);
543 if ((flags_ & MPI_REQ_SSEND) == 0 &&
544 ((flags_ & MPI_REQ_RMA) != 0 || (flags_ & MPI_REQ_BSEND) != 0 ||
545 static_cast<int>(size_) < smpi_cfg_detached_send_thresh())) {
546 void *oldbuf = nullptr;
548 XBT_DEBUG("Send request %p is detached", this);
550 if (not(type_->flags() & DT_FLAG_DERIVED)) {
552 if (not process->replaying() && oldbuf != nullptr && size_ != 0) {
553 if (smpi_switch_data_segment(simgrid::s4u::Actor::by_pid(src_), buf_))
554 XBT_DEBUG("Privatization : We are sending from a zone inside global memory. Switch data segment ");
556 //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
557 //so actually ... don't use manually attached buffer space.
558 buf = xbt_malloc(size_);
559 memcpy(buf,oldbuf,size_);
560 XBT_DEBUG("buf %p copied into %p",oldbuf,buf);
565 //if we are giving back the control to the user without waiting for completion, we have to inject timings
566 double sleeptime = 0.0;
567 if (detached_ || ((flags_ & (MPI_REQ_ISEND | MPI_REQ_SSEND)) != 0)) { // issend should be treated as isend
568 // isend and send timings may be different
570 ((flags_ & MPI_REQ_ISEND) != 0)
571 ? simgrid::s4u::Actor::self()->get_host()->extension<simgrid::smpi::Host>()->oisend(
572 size_, simgrid::s4u::Actor::by_pid(src_)->get_host(), simgrid::s4u::Actor::by_pid(dst_)->get_host())
573 : simgrid::s4u::Actor::self()->get_host()->extension<simgrid::smpi::Host>()->osend(
574 size_, simgrid::s4u::Actor::by_pid(src_)->get_host(),
575 simgrid::s4u::Actor::by_pid(dst_)->get_host());
579 simgrid::s4u::this_actor::sleep_for(sleeptime);
580 XBT_DEBUG("sending size of %zu : sleep %f ", size_, sleeptime);
583 simgrid::s4u::MutexPtr mut = process->mailboxes_mutex();
585 if (smpi_cfg_async_small_thresh() != 0 || (flags_ & MPI_REQ_RMA) != 0)
588 if (not(smpi_cfg_async_small_thresh() != 0 || (flags_ & MPI_REQ_RMA) != 0)) {
589 mailbox = process->mailbox();
590 } else if (((flags_ & MPI_REQ_RMA) != 0) || static_cast<int>(size_) < smpi_cfg_async_small_thresh()) { // eager mode
591 bool is_probe = ((flags_ & MPI_REQ_PROBE) != 0);
592 flags_ |= MPI_REQ_PROBE;
594 mailbox = process->mailbox();
595 XBT_DEBUG("Is there a corresponding recv already posted in the large mailbox %s?", mailbox->get_cname());
596 if (not mailbox->iprobe(1, &match_send, static_cast<void*>(this))) {
597 if ((flags_ & MPI_REQ_SSEND) == 0) {
598 mailbox = process->mailbox_small();
599 XBT_DEBUG("No, nothing in the large mailbox, message is to be sent on the small one %s",
600 mailbox->get_cname());
602 mailbox = process->mailbox_small();
603 XBT_DEBUG("SSEND : Is there a corresponding recv already posted in the small mailbox %s?",
604 mailbox->get_cname());
605 if (not mailbox->iprobe(1, &match_send, static_cast<void*>(this))) {
606 XBT_DEBUG("No, we are first, send to large mailbox");
607 mailbox = process->mailbox();
611 XBT_DEBUG("Yes there was something for us in the large mailbox");
614 flags_ &= ~MPI_REQ_PROBE;
616 mailbox = process->mailbox();
617 XBT_DEBUG("Send request %p is in the large mailbox %s (buf: %p)", this, mailbox->get_cname(), buf_);
620 size_t payload_size_ = size_ + 16;//MPI enveloppe size (tag+dest+communicator)
621 kernel::actor::CommIsendSimcall observer{
622 simgrid::kernel::EngineImpl::get_instance()->get_actor_by_pid(src_), mailbox->get_impl(),
623 static_cast<double>(payload_size_), -1, static_cast<unsigned char*>(buf), real_size_, &match_send,
624 &xbt_free_f, // how to free the userdata if a detached send fails
625 process->replaying() ? &smpi_comm_null_copy_buffer_callback : smpi_comm_copy_data_callback, this,
626 // detach if msg size < eager/rdv switch limit
628 observer.set_tag(tag_);
629 action_ = kernel::actor::simcall_answered([&observer] { return kernel::activity::CommImpl::isend(&observer); },
631 XBT_DEBUG("send simcall posted");
633 /* FIXME: detached sends are not traceable (action_ == nullptr) */
634 if (action_ != nullptr) {
635 boost::static_pointer_cast<kernel::activity::CommImpl>(action_)->set_tracing_category(
636 smpi_process()->get_tracing_category());
639 if (smpi_cfg_async_small_thresh() != 0 || ((flags_ & MPI_REQ_RMA) != 0))
644 void Request::startall(int count, MPI_Request * requests)
646 if(requests== nullptr)
649 for(int i = 0; i < count; i++) {
650 if(requests[i]->src_ != MPI_PROC_NULL && requests[i]->dst_ != MPI_PROC_NULL)
651 requests[i]->start();
655 void Request::cancel()
657 this->flags_ |= MPI_REQ_CANCELLED;
658 if (this->action_ != nullptr)
659 (boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(this->action_))->cancel();
662 int Request::test(MPI_Request * request, MPI_Status * status, int* flag) {
663 // assume that *request is not MPI_REQUEST_NULL (filtered in PMPI_Test or testall before)
664 // to avoid deadlocks if used as a break condition, such as
665 // while (MPI_Test(request, flag, status) && flag) dostuff...
666 // because the time will not normally advance when only calls to MPI_Test are made -> deadlock
667 // multiplier to the sleeptime, to increase speed of execution, each failed test will increase it
668 xbt_assert(*request != MPI_REQUEST_NULL);
670 static int nsleeps = 1;
671 int ret = MPI_SUCCESS;
673 if(smpi_test_sleep > 0)
674 simgrid::s4u::this_actor::sleep_for(nsleeps * smpi_test_sleep);
676 Status::empty(status);
679 if ((*request)->flags_ & MPI_REQ_NBC){
680 *flag = finish_nbc_requests(request, 1);
683 if (((*request)->flags_ & (MPI_REQ_PREPARED | MPI_REQ_FINISHED)) == 0) {
684 if ((*request)->action_ != nullptr && ((*request)->flags_ & MPI_REQ_CANCELLED) == 0){
686 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
687 kernel::actor::ActivityTestSimcall observer{issuer, (*request)->action_.get()};
688 *flag = kernel::actor::simcall_answered(
689 [&observer] { return observer.get_activity()->test(observer.get_issuer()); }, &observer);
690 } catch (const Exception&) {
695 if (((*request)->flags_ & MPI_REQ_GENERALIZED) && not((*request)->flags_ & MPI_REQ_COMPLETE))
698 finish_wait(request, status); // may invalidate *request
699 if (*request != MPI_REQUEST_NULL && ((*request)->flags_ & MPI_REQ_GENERALIZED)){
700 MPI_Status tmp_status;
701 MPI_Status* mystatus;
702 if (status == MPI_STATUS_IGNORE) {
703 mystatus = &tmp_status;
704 Status::empty(mystatus);
708 ret = ((*request)->generalized_funcs)->query_fn(((*request)->generalized_funcs)->extra_state, mystatus);
710 nsleeps=1;//reset the number of sleeps we will do next time
711 if (*request != MPI_REQUEST_NULL && ((*request)->flags_ & MPI_REQ_PERSISTENT) == 0)
712 *request = MPI_REQUEST_NULL;
713 } else if (smpi_cfg_grow_injected_times()) {
720 int Request::testsome(int incount, MPI_Request requests[], int *count, int *indices, MPI_Status status[])
726 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
729 for (int i = 0; i < incount; i++) {
730 if (requests[i] != MPI_REQUEST_NULL && not (requests[i]->flags_ & MPI_REQ_FINISHED)) {
731 if (test(&requests[i], pstat, &flag) != MPI_SUCCESS)
735 if (status != MPI_STATUSES_IGNORE)
736 status[*count] = *pstat;
738 if ((requests[i] != MPI_REQUEST_NULL) && (requests[i]->flags_ & MPI_REQ_NON_PERSISTENT))
739 requests[i] = MPI_REQUEST_NULL;
745 if(count_dead==incount)*count=MPI_UNDEFINED;
747 return MPI_ERR_IN_STATUS;
752 int Request::testany(int count, MPI_Request requests[], int *index, int* flag, MPI_Status * status)
754 std::vector<simgrid::kernel::activity::ActivityImpl*> comms;
755 comms.reserve(count);
758 int ret = MPI_SUCCESS;
759 *index = MPI_UNDEFINED;
761 std::vector<int> map; /** Maps all matching comms back to their location in requests **/
762 for (int i = 0; i < count; i++) {
763 if ((requests[i] != MPI_REQUEST_NULL) && requests[i]->action_ && not(requests[i]->flags_ & MPI_REQ_PREPARED)) {
764 comms.push_back(requests[i]->action_.get());
768 if (not map.empty()) {
769 //multiplier to the sleeptime, to increase speed of execution, each failed testany will increase it
770 static int nsleeps = 1;
771 if(smpi_test_sleep > 0)
772 simgrid::s4u::this_actor::sleep_for(nsleeps * smpi_test_sleep);
775 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
776 kernel::actor::ActivityTestanySimcall observer{issuer, comms};
777 i = kernel::actor::simcall_answered(
779 return kernel::activity::ActivityImpl::test_any(observer.get_issuer(), observer.get_activities());
782 } catch (const Exception&) {
783 XBT_DEBUG("Exception in testany");
787 if (i != -1) { // -1 is not MPI_UNDEFINED but a SIMIX return code. (nothing matches)
789 if (requests[*index] != MPI_REQUEST_NULL && (requests[*index]->flags_ & MPI_REQ_GENERALIZED) &&
790 not(requests[*index]->flags_ & MPI_REQ_COMPLETE)) {
793 finish_wait(&requests[*index],status);
794 if (requests[*index] != MPI_REQUEST_NULL && (requests[*index]->flags_ & MPI_REQ_GENERALIZED)){
795 MPI_Status tmp_status;
796 MPI_Status* mystatus;
797 if (status == MPI_STATUS_IGNORE) {
798 mystatus = &tmp_status;
799 Status::empty(mystatus);
803 ret=(requests[*index]->generalized_funcs)->query_fn((requests[*index]->generalized_funcs)->extra_state, mystatus);
806 if (requests[*index] != MPI_REQUEST_NULL && requests[*index]->flags_ & MPI_REQ_NBC){
807 *flag = finish_nbc_requests(&requests[*index] , 1);
810 if (requests[*index] != MPI_REQUEST_NULL && (requests[*index]->flags_ & MPI_REQ_NON_PERSISTENT))
811 requests[*index] = MPI_REQUEST_NULL;
812 XBT_DEBUG("Testany - returning with index %d", *index);
820 XBT_DEBUG("Testany on inactive handles, returning flag=1 but empty status");
821 //all requests are null or inactive, return true
823 *index = MPI_UNDEFINED;
824 Status::empty(status);
830 int Request::testall(int count, MPI_Request requests[], int* outflag, MPI_Status status[])
833 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
837 for(int i=0; i<count; i++){
838 if (requests[i] != MPI_REQUEST_NULL && not(requests[i]->flags_ & MPI_REQ_PREPARED)) {
839 int ret = test(&requests[i], pstat, &flag);
845 if (ret != MPI_SUCCESS)
848 Status::empty(pstat);
850 if(status != MPI_STATUSES_IGNORE) {
855 return MPI_ERR_IN_STATUS;
860 void Request::probe(int source, int tag, MPI_Comm comm, MPI_Status* status){
862 //FIXME find another way to avoid busy waiting ?
863 // the issue here is that we have to wait on a nonexistent comm
865 iprobe(source, tag, comm, &flag, status);
866 XBT_DEBUG("Busy Waiting on probing : %d", flag);
870 void Request::iprobe(int source, int tag, MPI_Comm comm, int* flag, MPI_Status* status){
871 // to avoid deadlock, we have to sleep some time here, or the timer won't advance and we will only do iprobe simcalls
872 // especially when used as a break condition, such as while (MPI_Iprobe(...)) dostuff...
873 // nsleeps is a multiplier to the sleeptime, to increase speed of execution, each failed iprobe will increase it
874 // This can speed up the execution of certain applications by an order of magnitude, such as HPL
875 static int nsleeps = 1;
876 double speed = s4u::this_actor::get_host()->get_speed();
877 double maxrate = smpi_cfg_iprobe_cpu_usage();
879 new Request(nullptr, 0, MPI_CHAR, source == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : comm->group()->actor(source),
880 simgrid::s4u::this_actor::get_pid(), tag, comm, MPI_REQ_PERSISTENT | MPI_REQ_RECV | MPI_REQ_PROBE);
881 if (smpi_iprobe_sleep > 0) {
882 /** Compute the number of flops we will sleep **/
883 s4u::this_actor::exec_init(/*nsleeps: See comment above */ nsleeps *
884 /*(seconds * flop/s -> total flops)*/ smpi_iprobe_sleep * speed * maxrate)
886 /* Not the entire CPU can be used when iprobing: This is important for
887 * the energy consumption caused by polling with iprobes.
888 * Note also that the number of flops that was
889 * computed above contains a maxrate factor and is hence reduced (maxrate < 1)
891 ->set_bound(maxrate * speed)
895 // behave like a receive, but don't do it
896 s4u::Mailbox* mailbox;
898 request->print_request("New iprobe");
899 // We have to test both mailboxes as we don't know if we will receive one or another
900 if (smpi_cfg_async_small_thresh() > 0) {
901 mailbox = smpi_process()->mailbox_small();
902 XBT_DEBUG("Trying to probe the perm recv mailbox");
903 request->action_ = mailbox->iprobe(0, &match_recv, static_cast<void*>(request));
906 if (request->action_ == nullptr){
907 mailbox = smpi_process()->mailbox();
908 XBT_DEBUG("trying to probe the other mailbox");
909 request->action_ = mailbox->iprobe(0, &match_recv, static_cast<void*>(request));
912 if (request->action_ != nullptr){
913 kernel::activity::CommImplPtr sync_comm = boost::static_pointer_cast<kernel::activity::CommImpl>(request->action_);
914 const Request* req = static_cast<MPI_Request>(sync_comm->src_data_);
916 if (status != MPI_STATUS_IGNORE && (req->flags_ & MPI_REQ_PREPARED) == 0) {
917 status->MPI_SOURCE = comm->group()->rank(req->src_);
918 status->MPI_TAG = req->tag_;
919 status->MPI_ERROR = MPI_SUCCESS;
920 status->count = req->real_size_;
922 nsleeps = 1;//reset the number of sleeps we will do next time
926 if (smpi_cfg_grow_injected_times())
930 xbt_assert(request == MPI_REQUEST_NULL);
933 int Request::finish_nbc_requests(MPI_Request* request, int test){
937 ret = waitall((*request)->nbc_requests_.size(), (*request)->nbc_requests_.data(), MPI_STATUSES_IGNORE);
939 ret = testall((*request)->nbc_requests_.size(), (*request)->nbc_requests_.data(), &flag, MPI_STATUSES_IGNORE);
942 xbt_die("Failure when waiting on non blocking collective sub-requests");
944 XBT_DEBUG("Finishing non blocking collective request with %zu sub-requests", (*request)->nbc_requests_.size());
945 for(auto& req: (*request)->nbc_requests_){
946 if((*request)->buf_!=nullptr && req!=MPI_REQUEST_NULL){//reduce case
947 void * buf=req->buf_;
948 if((*request)->type_->flags() & DT_FLAG_DERIVED)
950 if(req->flags_ & MPI_REQ_RECV ){
951 if((*request)->op_!=MPI_OP_NULL){
952 int count=(*request)->size_/ (*request)->type_->size();
953 (*request)->op_->apply(buf, (*request)->buf_, &count, (*request)->type_);
955 smpi_free_tmp_buffer(static_cast<unsigned char*>(buf));
958 if(req!=MPI_REQUEST_NULL)
959 Request::unref(&req);
961 (*request)->nbc_requests_.clear();
966 void Request::finish_wait(MPI_Request* request, MPI_Status * status)
968 MPI_Request req = *request;
969 Status::empty(status);
970 if((req->flags_ & MPI_REQ_CANCELLED) != 0 && (req->flags_ & MPI_REQ_MATCHED) == 0) {
971 if (status!=MPI_STATUS_IGNORE)
973 if(req->detached_sender_ != nullptr)
974 unref(&(req->detached_sender_));
979 if ((req->flags_ & (MPI_REQ_PREPARED | MPI_REQ_GENERALIZED | MPI_REQ_FINISHED)) == 0) {
980 if (status != MPI_STATUS_IGNORE) {
981 if (req->src_== MPI_PROC_NULL || req->dst_== MPI_PROC_NULL){
982 Status::empty(status);
983 status->MPI_SOURCE = MPI_PROC_NULL;
985 aid_t src = req->src_ == MPI_ANY_SOURCE ? req->real_src_ : req->src_;
986 status->MPI_SOURCE = req->comm_->group()->rank(src);
987 status->MPI_TAG = req->tag_ == MPI_ANY_TAG ? req->real_tag_ : req->tag_;
988 status->MPI_ERROR = req->truncated_ ? MPI_ERR_TRUNCATE : MPI_SUCCESS;
990 // this handles the case were size in receive differs from size in send
991 status->count = req->real_size_;
993 //detached send will be finished at the other end
994 if (not(req->detached_ && ((req->flags_ & MPI_REQ_SEND) != 0))) {
995 req->print_request("Finishing");
996 MPI_Datatype datatype = req->type_;
998 // FIXME Handle the case of a partial shared malloc.
999 if (not smpi_process()->replaying() &&
1000 (((req->flags_ & MPI_REQ_ACCUMULATE) != 0) || (datatype->flags() & DT_FLAG_DERIVED))) {
1001 if (smpi_switch_data_segment(simgrid::s4u::Actor::self(), req->old_buf_))
1002 XBT_VERB("Privatization : We are unserializing to a zone in global memory Switch data segment ");
1004 if(datatype->flags() & DT_FLAG_DERIVED){
1005 // This part handles the problem of non-contiguous memory the unserialization at the reception
1006 if ((req->flags_ & MPI_REQ_RECV) && datatype->size() != 0)
1007 datatype->unserialize(req->buf_, req->old_buf_, req->real_size_/datatype->size() , req->op_);
1008 xbt_free(req->buf_);
1010 } else if (req->flags_ & MPI_REQ_RECV) { // apply op on contiguous buffer for accumulate
1011 if (datatype->size() != 0) {
1012 int n = req->real_size_ / datatype->size();
1013 req->op_->apply(req->buf_, req->old_buf_, &n, datatype);
1015 xbt_free(req->buf_);
1022 if (TRACE_smpi_view_internals() && ((req->flags_ & MPI_REQ_RECV) != 0)) {
1023 aid_t rank = simgrid::s4u::this_actor::get_pid();
1024 aid_t src_traced = (req->src_ == MPI_ANY_SOURCE ? req->real_src_ : req->src_);
1025 TRACE_smpi_recv(src_traced, rank,req->tag_);
1027 if(req->detached_sender_ != nullptr){
1028 //integrate pseudo-timing for buffering of small messages, do not bother to execute the simcall if 0
1029 simgrid::s4u::Host* dst_host = simgrid::s4u::Actor::by_pid(req->dst_)->get_host();
1030 double sleeptime = simgrid::s4u::Actor::self()->get_host()->extension<simgrid::smpi::Host>()->orecv(
1031 req->real_size(), req->src_host_, dst_host);
1032 if (sleeptime > 0.0) {
1033 simgrid::s4u::this_actor::sleep_for(sleeptime);
1034 XBT_DEBUG("receiving size of %zu : sleep %f ", req->real_size_, sleeptime);
1036 unref(&(req->detached_sender_));
1038 if (req->flags_ & MPI_REQ_PERSISTENT)
1039 req->action_ = nullptr;
1040 req->flags_ |= MPI_REQ_FINISHED;
1042 if (req->truncated_ || req->unmatched_types_) {
1043 char error_string[MPI_MAX_ERROR_STRING];
1046 if(req->truncated_ )
1047 errkind = MPI_ERR_TRUNCATE;
1049 errkind = MPI_ERR_TYPE;
1050 PMPI_Error_string(errkind, error_string, &error_size);
1051 MPI_Errhandler err = (req->comm_) ? (req->comm_)->errhandler() : MPI_ERRHANDLER_NULL;
1052 if (err == MPI_ERRHANDLER_NULL || err == MPI_ERRORS_RETURN)
1053 XBT_WARN("recv - returned %.*s instead of MPI_SUCCESS", error_size, error_string);
1054 else if (err == MPI_ERRORS_ARE_FATAL)
1055 xbt_die("recv - returned %.*s instead of MPI_SUCCESS", error_size, error_string);
1057 err->call((req->comm_), errkind);
1058 if (err != MPI_ERRHANDLER_NULL)
1059 simgrid::smpi::Errhandler::unref(err);
1060 MC_assert(not MC_is_active()); /* Only fail in MC mode */
1062 if(req->src_ != MPI_PROC_NULL && req->dst_ != MPI_PROC_NULL)
1066 int Request::wait(MPI_Request * request, MPI_Status * status)
1068 // assume that *request is not MPI_REQUEST_NULL (filtered in PMPI_Wait before)
1069 xbt_assert(*request != MPI_REQUEST_NULL);
1071 int ret=MPI_SUCCESS;
1073 if((*request)->src_ == MPI_PROC_NULL || (*request)->dst_ == MPI_PROC_NULL){
1074 if (status != MPI_STATUS_IGNORE) {
1075 Status::empty(status);
1076 status->MPI_SOURCE = MPI_PROC_NULL;
1078 (*request)=MPI_REQUEST_NULL;
1082 (*request)->print_request("Waiting");
1083 if ((*request)->flags_ & (MPI_REQ_PREPARED | MPI_REQ_FINISHED)) {
1084 Status::empty(status);
1088 if ((*request)->action_ != nullptr){
1090 // this is not a detached send
1091 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
1092 kernel::actor::ActivityWaitSimcall observer{issuer, (*request)->action_.get(), -1};
1093 kernel::actor::simcall_blocking([issuer, &observer] { observer.get_activity()->wait_for(issuer, -1); },
1095 } catch (const CancelException&) {
1096 XBT_VERB("Request cancelled");
1100 if ((*request)->flags_ & MPI_REQ_GENERALIZED) {
1101 if (not((*request)->flags_ & MPI_REQ_COMPLETE)) {
1102 ((*request)->generalized_funcs)->mutex->lock();
1103 ((*request)->generalized_funcs)->cond->wait(((*request)->generalized_funcs)->mutex);
1104 ((*request)->generalized_funcs)->mutex->unlock();
1106 MPI_Status tmp_status;
1107 MPI_Status* mystatus;
1108 if (status == MPI_STATUS_IGNORE) {
1109 mystatus = &tmp_status;
1110 Status::empty(mystatus);
1114 ret = ((*request)->generalized_funcs)->query_fn(((*request)->generalized_funcs)->extra_state, mystatus);
1117 if ((*request)->truncated_)
1118 ret = MPI_ERR_TRUNCATE;
1120 if ((*request)->flags_ & MPI_REQ_NBC)
1121 finish_nbc_requests(request, 0);
1123 finish_wait(request, status); // may invalidate *request
1124 if (*request != MPI_REQUEST_NULL && (((*request)->flags_ & MPI_REQ_NON_PERSISTENT) != 0))
1125 *request = MPI_REQUEST_NULL;
1129 int Request::waitany(int count, MPI_Request requests[], MPI_Status * status)
1131 int index = MPI_UNDEFINED;
1134 // Wait for a request to complete
1135 std::vector<simgrid::kernel::activity::ActivityImpl*> comms;
1136 std::vector<int> map;
1137 XBT_DEBUG("Wait for one of %d", count);
1138 for(int i = 0; i < count; i++) {
1139 if (requests[i] != MPI_REQUEST_NULL && not(requests[i]->flags_ & MPI_REQ_PREPARED) &&
1140 not(requests[i]->flags_ & MPI_REQ_FINISHED)) {
1141 if (requests[i]->action_ != nullptr) {
1142 XBT_DEBUG("Waiting any %p ", requests[i]);
1143 comms.push_back(requests[i]->action_.get());
1146 // This is a finished detached request, let's return this one
1147 comms.clear(); // don't do the waitany call afterwards
1149 if (requests[index]->flags_ & MPI_REQ_NBC)
1150 finish_nbc_requests(&requests[index], 0);
1151 finish_wait(&requests[i], status); // cleanup if refcount = 0
1152 if (requests[i] != MPI_REQUEST_NULL && (requests[i]->flags_ & MPI_REQ_NON_PERSISTENT))
1153 requests[i] = MPI_REQUEST_NULL; // set to null
1158 if (not comms.empty()) {
1159 XBT_DEBUG("Enter waitany for %zu comms", comms.size());
1162 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
1163 kernel::actor::ActivityWaitanySimcall observer{issuer, comms, -1};
1164 i = kernel::actor::simcall_blocking(
1166 kernel::activity::ActivityImpl::wait_any_for(observer.get_issuer(), observer.get_activities(),
1167 observer.get_timeout());
1170 } catch (const CancelException&) {
1171 XBT_INFO("request cancelled");
1175 // not MPI_UNDEFINED, as this is a simix return code
1178 //in case of an accumulate, we have to wait the end of all requests to apply the operation, ordered correctly.
1179 if ((requests[index] == MPI_REQUEST_NULL) ||
1180 (not((requests[index]->flags_ & MPI_REQ_ACCUMULATE) && (requests[index]->flags_ & MPI_REQ_RECV)))) {
1181 finish_wait(&requests[index],status);
1182 if (requests[index] != MPI_REQUEST_NULL && (requests[index]->flags_ & MPI_REQ_NON_PERSISTENT))
1183 requests[index] = MPI_REQUEST_NULL;
1190 if (index==MPI_UNDEFINED)
1191 Status::empty(status);
1196 static int sort_accumulates(const Request* a, const Request* b)
1198 return (a->tag() > b->tag());
1201 int Request::waitall(int count, MPI_Request requests[], MPI_Status status[])
1203 std::vector<MPI_Request> accumulates;
1206 MPI_Status *pstat = (status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat);
1207 int retvalue = MPI_SUCCESS;
1208 //tag invalid requests in the set
1209 if (status != MPI_STATUSES_IGNORE) {
1210 for (int c = 0; c < count; c++) {
1211 if (requests[c] == MPI_REQUEST_NULL || requests[c]->dst_ == MPI_PROC_NULL ||
1212 (requests[c]->flags_ & MPI_REQ_PREPARED)) {
1213 Status::empty(&status[c]);
1214 } else if (requests[c]->src_ == MPI_PROC_NULL) {
1215 Status::empty(&status[c]);
1216 status[c].MPI_SOURCE = MPI_PROC_NULL;
1220 for (int c = 0; c < count; c++) {
1221 if (MC_is_active() || MC_record_replay_is_active()) {
1222 wait(&requests[c],pstat);
1225 index = waitany(count, requests, pstat);
1227 if (index == MPI_UNDEFINED)
1230 if (requests[index] != MPI_REQUEST_NULL && (requests[index]->flags_ & MPI_REQ_RECV) &&
1231 (requests[index]->flags_ & MPI_REQ_ACCUMULATE))
1232 accumulates.push_back(requests[index]);
1233 if (requests[index] != MPI_REQUEST_NULL && (requests[index]->flags_ & MPI_REQ_NON_PERSISTENT))
1234 requests[index] = MPI_REQUEST_NULL;
1236 if (status != MPI_STATUSES_IGNORE) {
1237 status[index] = *pstat;
1238 if (status[index].MPI_ERROR == MPI_ERR_TRUNCATE)
1239 retvalue = MPI_ERR_IN_STATUS;
1243 std::sort(accumulates.begin(), accumulates.end(), sort_accumulates);
1244 for (auto& req : accumulates)
1245 finish_wait(&req, status);
1250 int Request::waitsome(int incount, MPI_Request requests[], int *indices, MPI_Status status[])
1256 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
1257 index = waitany(incount, requests, pstat);
1258 if(index==MPI_UNDEFINED) return MPI_UNDEFINED;
1259 if(status != MPI_STATUSES_IGNORE) {
1260 status[count] = *pstat;
1262 indices[count] = index;
1264 for (int i = 0; i < incount; i++) {
1265 if (i != index && requests[i] != MPI_REQUEST_NULL && not(requests[i]->flags_ & MPI_REQ_FINISHED)) {
1266 test(&requests[i], pstat,&flag);
1269 if(status != MPI_STATUSES_IGNORE) {
1270 status[count] = *pstat;
1272 if (requests[i] != MPI_REQUEST_NULL && (requests[i]->flags_ & MPI_REQ_NON_PERSISTENT))
1273 requests[i]=MPI_REQUEST_NULL;
1281 MPI_Request Request::f2c(int id)
1283 if(id==MPI_FORTRAN_REQUEST_NULL)
1284 return MPI_REQUEST_NULL;
1285 return static_cast<MPI_Request>(F2C::lookup()->at(id));
1288 void Request::free_f(int id)
1290 if (id != MPI_FORTRAN_REQUEST_NULL) {
1291 F2C::lookup()->erase(id);
1295 int Request::get_status(const Request* req, int* flag, MPI_Status* status)
1299 if(req != MPI_REQUEST_NULL && req->action_ != nullptr) {
1300 req->iprobe(req->comm_->group()->rank(req->src_), req->tag_, req->comm_, flag, status);
1304 if (req != MPI_REQUEST_NULL && (req->flags_ & MPI_REQ_GENERALIZED) && not(req->flags_ & MPI_REQ_COMPLETE)) {
1310 if(req != MPI_REQUEST_NULL &&
1311 status != MPI_STATUS_IGNORE) {
1312 aid_t src = req->src_ == MPI_ANY_SOURCE ? req->real_src_ : req->src_;
1313 status->MPI_SOURCE = req->comm_->group()->rank(src);
1314 status->MPI_TAG = req->tag_ == MPI_ANY_TAG ? req->real_tag_ : req->tag_;
1315 status->MPI_ERROR = req->truncated_ ? MPI_ERR_TRUNCATE : MPI_SUCCESS;
1316 status->count = req->real_size_;
1321 int Request::grequest_start(MPI_Grequest_query_function* query_fn, MPI_Grequest_free_function* free_fn,
1322 MPI_Grequest_cancel_function* cancel_fn, void* extra_state, MPI_Request* request)
1324 *request = new Request();
1325 (*request)->flags_ |= MPI_REQ_GENERALIZED;
1326 (*request)->flags_ |= MPI_REQ_PERSISTENT;
1327 (*request)->refcount_ = 1;
1328 ((*request)->generalized_funcs) = std::make_unique<smpi_mpi_generalized_request_funcs_t>();
1329 ((*request)->generalized_funcs)->query_fn=query_fn;
1330 ((*request)->generalized_funcs)->free_fn=free_fn;
1331 ((*request)->generalized_funcs)->cancel_fn=cancel_fn;
1332 ((*request)->generalized_funcs)->extra_state=extra_state;
1333 ((*request)->generalized_funcs)->cond = simgrid::s4u::ConditionVariable::create();
1334 ((*request)->generalized_funcs)->mutex = simgrid::s4u::Mutex::create();
1338 int Request::grequest_complete(MPI_Request request)
1340 if ((not(request->flags_ & MPI_REQ_GENERALIZED)) || request->generalized_funcs->mutex == nullptr)
1341 return MPI_ERR_REQUEST;
1342 request->generalized_funcs->mutex->lock();
1343 request->flags_ |= MPI_REQ_COMPLETE; // in case wait would be called after complete
1344 request->generalized_funcs->cond->notify_one();
1345 request->generalized_funcs->mutex->unlock();
1349 void Request::start_nbc_requests(std::vector<MPI_Request> reqs){
1350 if (not reqs.empty()) {
1351 nbc_requests_ = reqs;
1352 Request::startall(reqs.size(), reqs.data());
1356 std::vector<MPI_Request> Request::get_nbc_requests() const
1358 return nbc_requests_;