1 /* Copyright (c) 2007-2023. 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"
9 #include "simgrid/Exception.hpp"
10 #include "simgrid/s4u/ConditionVariable.hpp"
11 #include "simgrid/s4u/Exec.hpp"
12 #include "simgrid/s4u/Mutex.hpp"
13 #include "smpi_comm.hpp"
14 #include "smpi_datatype.hpp"
15 #include "smpi_host.hpp"
16 #include "smpi_op.hpp"
17 #include "src/kernel/EngineImpl.hpp"
18 #include "src/kernel/activity/CommImpl.hpp"
19 #include "src/kernel/actor/ActorImpl.hpp"
20 #include "src/kernel/actor/SimcallObserver.hpp"
21 #include "src/mc/mc.h"
22 #include "src/mc/mc_replay.hpp"
23 #include "src/smpi/include/smpi_actor.hpp"
27 #include <mutex> // std::scoped_lock and std::unique_lock
29 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_request, smpi, "Logging specific to SMPI (request)");
31 static simgrid::config::Flag<double> smpi_iprobe_sleep(
32 "smpi/iprobe", "Minimum time to inject inside a call to MPI_Iprobe", 1e-4);
33 static simgrid::config::Flag<double> smpi_test_sleep(
34 "smpi/test", "Minimum time to inject inside a call to MPI_Test", 1e-4);
36 extern std::function<void(simgrid::kernel::activity::CommImpl*, void*, size_t)> smpi_comm_copy_data_callback;
38 namespace simgrid::smpi {
40 Request::Request(const void* buf, int count, MPI_Datatype datatype, aid_t src, aid_t dst, int tag, MPI_Comm comm,
41 unsigned flags, MPI_Op op)
42 : buf_(const_cast<void*>(buf))
45 , size_(datatype->size() * count)
55 if(op != MPI_REPLACE && op != MPI_OP_NULL)
59 detached_sender_ = nullptr;
61 // get src_host if it's available (src is valid)
62 if (auto src_process = simgrid::s4u::Actor::by_pid(src))
63 src_host_ = src_process->get_host();
65 unmatched_types_ = false;
68 if (flags & MPI_REQ_PERSISTENT)
81 void Request::unref(MPI_Request* request)
83 xbt_assert(*request != MPI_REQUEST_NULL, "freeing an already free request");
85 (*request)->refcount_--;
86 if ((*request)->refcount_ < 0) {
87 (*request)->print_request("wrong refcount");
88 xbt_die("Whoops, wrong refcount");
90 if ((*request)->refcount_ == 0) {
91 if ((*request)->flags_ & MPI_REQ_GENERALIZED) {
92 ((*request)->generalized_funcs)->free_fn(((*request)->generalized_funcs)->extra_state);
94 Comm::unref((*request)->comm_);
95 Datatype::unref((*request)->type_);
97 if ((*request)->op_ != MPI_REPLACE && (*request)->op_ != MPI_OP_NULL)
98 Op::unref(&(*request)->op_);
100 (*request)->print_request("Destroying");
101 F2C::free_f((*request)->f2c_id());
103 *request = MPI_REQUEST_NULL;
105 (*request)->print_request("Decrementing");
109 bool Request::match_types(MPI_Datatype stype, MPI_Datatype rtype){
111 if ((stype == rtype) ||
112 //byte and packed always match with anything
113 (stype == MPI_PACKED || rtype == MPI_PACKED || stype == MPI_BYTE || rtype == MPI_BYTE) ||
114 //complex datatypes - we don't properly match these yet, as it would mean checking each subtype recursively.
115 (stype->flags() & DT_FLAG_DERIVED || rtype->flags() & DT_FLAG_DERIVED) ||
116 //duplicated datatypes, check if underlying is ok
117 (stype->duplicated_datatype()!=MPI_DATATYPE_NULL && match_types(stype->duplicated_datatype(), rtype)) ||
118 (rtype->duplicated_datatype()!=MPI_DATATYPE_NULL && match_types(stype, rtype->duplicated_datatype())))
121 XBT_WARN("Mismatched datatypes : sending %s and receiving %s", stype->name().c_str(), rtype->name().c_str());
126 bool Request::match_common(MPI_Request req, MPI_Request sender, MPI_Request receiver)
128 xbt_assert(sender, "Cannot match against null sender");
129 xbt_assert(receiver, "Cannot match against null receiver");
130 XBT_DEBUG("Trying to match %s of sender src %ld against %ld, tag %d against %d, id %d against %d",
131 (req == receiver ? "send" : "recv"), sender->src_, receiver->src_, sender->tag_, receiver->tag_,
132 sender->comm_->id(), receiver->comm_->id());
134 if ((receiver->comm_->id() == MPI_UNDEFINED || sender->comm_->id() == MPI_UNDEFINED ||
135 receiver->comm_->id() == sender->comm_->id()) &&
136 ((receiver->src_ == MPI_ANY_SOURCE && (receiver->comm_->group()->rank(sender->src_) != MPI_UNDEFINED)) ||
137 receiver->src_ == sender->src_) &&
138 ((receiver->tag_ == MPI_ANY_TAG && sender->tag_ >= 0) || receiver->tag_ == sender->tag_)) {
139 // we match, we can transfer some values
140 if (receiver->src_ == MPI_ANY_SOURCE) {
141 receiver->real_src_ = sender->src_;
142 receiver->src_host_ = sender->src_host_;
144 if (receiver->tag_ == MPI_ANY_TAG)
145 receiver->real_tag_ = sender->tag_;
146 if ((receiver->flags_ & MPI_REQ_PROBE) == 0 && receiver->real_size_ < sender->real_size_) {
147 XBT_DEBUG("Truncating message - should not happen: receiver size : %zu < sender size : %zu", receiver->real_size_,
149 receiver->truncated_ = true;
151 //0-sized datatypes/counts should not interfere and match
152 if (sender->real_size_ != 0 && receiver->real_size_ != 0 && not match_types(sender->type_, receiver->type_))
153 receiver->unmatched_types_ = true;
154 if (sender->detached_)
155 receiver->detached_sender_ = sender; // tie the sender to the receiver, as it is detached and has to be freed in
157 req->flags_ |= MPI_REQ_MATCHED; // mark as impossible to cancel anymore
158 XBT_DEBUG("match succeeded");
164 void Request::init_buffer(int count){
165 // FIXME Handle the case of a partial shared malloc.
166 // This part handles the problem of non-contiguous memory (for the unserialization at the reception)
167 if (not smpi_process()->replaying() &&
168 ((((flags_ & MPI_REQ_RECV) != 0) && ((flags_ & MPI_REQ_ACCUMULATE) != 0)) || (type_->flags() & DT_FLAG_DERIVED))) {
169 // This part handles the problem of non-contiguous memory
174 buf_ = xbt_malloc(count*type_->size());
175 if ((type_->flags() & DT_FLAG_DERIVED) && ((flags_ & MPI_REQ_SEND) != 0)) {
176 type_->serialize(old_buf_, buf_, count);
182 bool Request::match_recv(void* a, void* b, simgrid::kernel::activity::CommImpl*)
184 auto ref = static_cast<MPI_Request>(a);
185 auto req = static_cast<MPI_Request>(b);
186 bool match = match_common(req, req, ref);
187 if (not match || ref->comm_ == MPI_COMM_UNINITIALIZED || ref->comm_->is_smp_comm())
190 if (ref->comm_->get_received_messages_count(ref->comm_->group()->rank(req->src_),
191 ref->comm_->group()->rank(req->dst_), req->tag_) == req->message_id_) {
192 if (((ref->flags_ & MPI_REQ_PROBE) == 0) && ((req->flags_ & MPI_REQ_PROBE) == 0)) {
193 XBT_DEBUG("increasing count in comm %p, which was %u from pid %ld, to pid %ld with tag %d", ref->comm_,
194 ref->comm_->get_received_messages_count(ref->comm_->group()->rank(req->src_),
195 ref->comm_->group()->rank(req->dst_), req->tag_),
196 req->src_, req->dst_, req->tag_);
197 ref->comm_->increment_received_messages_count(ref->comm_->group()->rank(req->src_),
198 ref->comm_->group()->rank(req->dst_), req->tag_);
199 if (ref->real_size_ > req->real_size_) {
200 ref->real_size_ = req->real_size_;
205 req->flags_ &= ~MPI_REQ_MATCHED;
206 ref->detached_sender_ = nullptr;
207 XBT_DEBUG("Refusing to match message, as its ID is not the one I expect. in comm %p, %u != %u, "
208 "from pid %ld to pid %ld, with tag %d",
210 ref->comm_->get_received_messages_count(ref->comm_->group()->rank(req->src_),
211 ref->comm_->group()->rank(req->dst_), req->tag_),
212 req->message_id_, req->src_, req->dst_, req->tag_);
217 bool Request::match_send(void* a, void* b, simgrid::kernel::activity::CommImpl*)
219 auto ref = static_cast<MPI_Request>(a);
220 auto req = static_cast<MPI_Request>(b);
221 return match_common(req, ref, req);
224 void Request::print_request(const char* message) const
226 XBT_VERB("%s request %p [buf = %p, size = %zu, src = %ld, dst = %ld, tag = %d, flags = %x]", message, this, buf_,
227 size_, src_, dst_, tag_, flags_);
230 /* factories, to hide the internal flags from the caller */
231 MPI_Request Request::bsend_init(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
233 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
234 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
235 MPI_REQ_PERSISTENT | MPI_REQ_SEND | MPI_REQ_PREPARED | MPI_REQ_BSEND);
238 MPI_Request Request::send_init(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
240 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
241 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
242 MPI_REQ_PERSISTENT | MPI_REQ_SEND | MPI_REQ_PREPARED);
245 MPI_Request Request::ssend_init(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
247 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
248 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
249 MPI_REQ_PERSISTENT | MPI_REQ_SSEND | MPI_REQ_SEND | MPI_REQ_PREPARED);
252 MPI_Request Request::isend_init(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
254 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
255 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
256 MPI_REQ_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SEND | MPI_REQ_PREPARED);
259 MPI_Request Request::rma_send_init(const void *buf, int count, MPI_Datatype datatype, int src, int dst, int tag, MPI_Comm comm,
264 request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, comm->group()->actor(src),
265 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
266 MPI_REQ_RMA | MPI_REQ_NON_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SEND | MPI_REQ_PREPARED);
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 |
277 MPI_Request Request::recv_init(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm)
279 aid_t source = MPI_PROC_NULL;
280 if (src == MPI_ANY_SOURCE)
281 source = MPI_ANY_SOURCE;
282 else if (src != MPI_PROC_NULL)
283 source = comm->group()->actor(src);
284 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype,
286 simgrid::s4u::this_actor::get_pid(), tag, comm,
287 MPI_REQ_PERSISTENT | MPI_REQ_RECV | MPI_REQ_PREPARED);
290 MPI_Request Request::rma_recv_init(void *buf, int count, MPI_Datatype datatype, int src, int dst, int tag, MPI_Comm comm,
293 aid_t source = MPI_PROC_NULL;
294 if (src == MPI_ANY_SOURCE)
295 source = MPI_ANY_SOURCE;
296 else if (src != MPI_PROC_NULL)
297 source = comm->group()->actor(src);
300 request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, source,
301 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
302 MPI_REQ_RMA | MPI_REQ_NON_PERSISTENT | MPI_REQ_RECV | MPI_REQ_PREPARED);
305 new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, source,
306 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
307 MPI_REQ_RMA | MPI_REQ_NON_PERSISTENT | MPI_REQ_RECV | MPI_REQ_PREPARED | MPI_REQ_ACCUMULATE, op);
312 MPI_Request Request::irecv_init(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm)
314 aid_t source = MPI_PROC_NULL;
315 if (src == MPI_ANY_SOURCE)
316 source = MPI_ANY_SOURCE;
317 else if (src != MPI_PROC_NULL)
318 source = comm->group()->actor(src);
319 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype,
320 source, simgrid::s4u::this_actor::get_pid(), tag, comm,
321 MPI_REQ_PERSISTENT | MPI_REQ_RECV | MPI_REQ_PREPARED);
324 MPI_Request Request::ibsend(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
326 auto request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
327 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
328 MPI_REQ_NON_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SEND | MPI_REQ_BSEND);
329 if(dst != MPI_PROC_NULL)
334 MPI_Request Request::isend(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
336 auto request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
337 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
338 MPI_REQ_NON_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SEND);
339 if(dst != MPI_PROC_NULL)
344 MPI_Request Request::issend(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
346 auto request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
347 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
348 MPI_REQ_NON_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SSEND | MPI_REQ_SEND);
349 if(dst != MPI_PROC_NULL)
354 MPI_Request Request::irecv(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm)
356 aid_t source = MPI_PROC_NULL;
357 if (src == MPI_ANY_SOURCE)
358 source = MPI_ANY_SOURCE;
359 else if (src != MPI_PROC_NULL)
360 source = comm->group()->actor(src);
361 auto request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, source,
362 simgrid::s4u::this_actor::get_pid(), tag, comm, MPI_REQ_NON_PERSISTENT | MPI_REQ_RECV);
363 if(src != MPI_PROC_NULL)
368 int Request::recv(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm, MPI_Status * status)
370 MPI_Request request = irecv(buf, count, datatype, src, tag, comm);
371 int retval = wait(&request,status);
376 void Request::bsend(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
378 auto request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
379 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
380 MPI_REQ_NON_PERSISTENT | MPI_REQ_SEND | MPI_REQ_BSEND);
382 if(dst != MPI_PROC_NULL)
384 wait(&request, MPI_STATUS_IGNORE);
388 void Request::send(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
390 auto request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
391 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
392 MPI_REQ_NON_PERSISTENT | MPI_REQ_SEND);
393 if(dst != MPI_PROC_NULL)
395 wait(&request, MPI_STATUS_IGNORE);
399 void Request::ssend(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
401 auto request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
402 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
403 MPI_REQ_NON_PERSISTENT | MPI_REQ_SSEND | MPI_REQ_SEND);
405 if(dst != MPI_PROC_NULL)
407 wait(&request,MPI_STATUS_IGNORE);
411 void Request::sendrecv(const void *sendbuf, int sendcount, MPI_Datatype sendtype,int dst, int sendtag,
412 void *recvbuf, int recvcount, MPI_Datatype recvtype, int src, int recvtag,
413 MPI_Comm comm, MPI_Status * status)
415 aid_t source = MPI_PROC_NULL;
416 if (src == MPI_ANY_SOURCE)
417 source = MPI_ANY_SOURCE;
418 else if (src != MPI_PROC_NULL)
419 source = comm->group()->actor(src);
420 aid_t destination = dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL;
422 std::array<MPI_Request, 2> requests;
423 std::array<MPI_Status, 2> stats;
424 if (aid_t myid = simgrid::s4u::this_actor::get_pid(); (destination == myid) && (source == myid)) {
425 Datatype::copy(sendbuf, sendcount, sendtype, recvbuf, recvcount, recvtype);
426 if (status != MPI_STATUS_IGNORE) {
427 status->MPI_SOURCE = source;
428 status->MPI_TAG = recvtag;
429 status->MPI_ERROR = MPI_SUCCESS;
430 status->count = sendcount * sendtype->size();
434 requests[0] = isend_init(sendbuf, sendcount, sendtype, dst, sendtag, comm);
435 requests[1] = irecv_init(recvbuf, recvcount, recvtype, src, recvtag, comm);
436 startall(2, requests.data());
437 waitall(2, requests.data(), stats.data());
440 if(status != MPI_STATUS_IGNORE) {
441 // Copy receive status
446 void Request::start()
448 s4u::Mailbox* mailbox;
450 xbt_assert(action_ == nullptr, "Cannot (re-)start unfinished communication");
451 //reinitialize temporary buffer for persistent requests
452 if(real_size_ > 0 && flags_ & MPI_REQ_FINISHED){
454 init_buffer(real_size_/type_->size());
456 flags_ &= ~MPI_REQ_PREPARED;
457 flags_ &= ~MPI_REQ_FINISHED;
460 // we make a copy here, as the size is modified by simix, and we may reuse the request in another receive later
462 if ((flags_ & MPI_REQ_RECV) != 0) {
463 this->print_request("New recv");
465 simgrid::smpi::ActorExt* process = smpi_process_remote(simgrid::s4u::Actor::by_pid(dst_));
467 std::unique_lock<s4u::Mutex> mut_lock;
468 if (smpi_cfg_async_small_thresh() != 0 || (flags_ & MPI_REQ_RMA) != 0)
469 mut_lock = std::unique_lock(*process->mailboxes_mutex());
471 bool is_probe = ((flags_ & MPI_REQ_PROBE) != 0);
472 flags_ |= MPI_REQ_PROBE;
474 if (smpi_cfg_async_small_thresh() == 0 && (flags_ & MPI_REQ_RMA) == 0) {
475 mailbox = process->mailbox();
476 } else if (((flags_ & MPI_REQ_RMA) != 0) || static_cast<int>(size_) < smpi_cfg_async_small_thresh()) {
477 //We have to check both mailboxes (because SSEND messages are sent to the large mbox).
478 //begin with the more appropriate one : the small one.
479 mailbox = process->mailbox_small();
480 XBT_DEBUG("Is there a corresponding send already posted in the small mailbox %s (in case of SSEND)?",
481 mailbox->get_cname());
482 simgrid::kernel::activity::ActivityImplPtr action = mailbox->iprobe(0, &match_recv, static_cast<void*>(this));
484 if (action == nullptr) {
485 mailbox = process->mailbox();
486 XBT_DEBUG("No, nothing in the small mailbox test the other one : %s", mailbox->get_cname());
487 action = mailbox->iprobe(0, &match_recv, static_cast<void*>(this));
488 if (action == nullptr) {
489 XBT_DEBUG("Still nothing, switch back to the small mailbox : %s", mailbox->get_cname());
490 mailbox = process->mailbox_small();
493 XBT_DEBUG("yes there was something for us in the small mailbox");
496 mailbox = process->mailbox_small();
497 XBT_DEBUG("Is there a corresponding send already posted the small mailbox?");
498 simgrid::kernel::activity::ActivityImplPtr action = mailbox->iprobe(0, &match_recv, static_cast<void*>(this));
500 if (action == nullptr) {
501 XBT_DEBUG("No, nothing in the permanent receive mailbox");
502 mailbox = process->mailbox();
504 XBT_DEBUG("yes there was something for us in the small mailbox");
508 flags_ &= ~MPI_REQ_PROBE;
509 kernel::actor::CommIrecvSimcall observer{process->get_actor()->get_impl(),
511 static_cast<unsigned char*>(buf_),
514 process->replaying() ? &smpi_comm_null_copy_buffer_callback
515 : smpi_comm_copy_data_callback,
518 observer.set_tag(tag_);
520 action_ = kernel::actor::simcall_answered([&observer] { return kernel::activity::CommImpl::irecv(&observer); },
523 XBT_DEBUG("recv simcall posted");
524 } else { /* the RECV flag was not set, so this is a send */
525 const simgrid::smpi::ActorExt* process = smpi_process_remote(simgrid::s4u::Actor::by_pid(dst_));
526 xbt_assert(process, "Actor pid=%ld is gone??", dst_);
527 if (TRACE_smpi_view_internals())
528 TRACE_smpi_send(src_, src_, dst_, tag_, size_);
529 this->print_request("New send");
531 message_id_=comm_->get_sent_messages_count(comm_->group()->rank(src_), comm_->group()->rank(dst_), tag_);
532 comm_->increment_sent_messages_count(comm_->group()->rank(src_), comm_->group()->rank(dst_), tag_);
535 if ((flags_ & MPI_REQ_SSEND) == 0 &&
536 ((flags_ & MPI_REQ_RMA) != 0 || (flags_ & MPI_REQ_BSEND) != 0 ||
537 static_cast<int>(size_) < smpi_cfg_detached_send_thresh())) {
538 void *oldbuf = nullptr;
540 XBT_DEBUG("Send request %p is detached", this);
542 if (not(type_->flags() & DT_FLAG_DERIVED)) {
544 if (not process->replaying() && oldbuf != nullptr && size_ != 0) {
545 if (smpi_switch_data_segment(simgrid::s4u::Actor::by_pid(src_), buf_))
546 XBT_DEBUG("Privatization : We are sending from a zone inside global memory. Switch data segment ");
548 //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
549 //so actually ... don't use manually attached buffer space.
550 buf = xbt_malloc(size_);
551 memcpy(buf,oldbuf,size_);
552 XBT_DEBUG("buf %p copied into %p",oldbuf,buf);
557 //if we are giving back the control to the user without waiting for completion, we have to inject timings
558 double sleeptime = 0.0;
559 if (detached_ || ((flags_ & (MPI_REQ_ISEND | MPI_REQ_SSEND)) != 0)) { // issend should be treated as isend
560 // isend and send timings may be different
562 ((flags_ & MPI_REQ_ISEND) != 0)
563 ? simgrid::s4u::Actor::self()->get_host()->extension<simgrid::smpi::Host>()->oisend(
564 size_, simgrid::s4u::Actor::by_pid(src_)->get_host(), simgrid::s4u::Actor::by_pid(dst_)->get_host())
565 : simgrid::s4u::Actor::self()->get_host()->extension<simgrid::smpi::Host>()->osend(
566 size_, simgrid::s4u::Actor::by_pid(src_)->get_host(),
567 simgrid::s4u::Actor::by_pid(dst_)->get_host());
571 simgrid::s4u::this_actor::sleep_for(sleeptime);
572 XBT_DEBUG("sending size of %zu : sleep %f ", size_, sleeptime);
575 std::unique_lock<s4u::Mutex> mut_lock;
576 if (smpi_cfg_async_small_thresh() != 0 || (flags_ & MPI_REQ_RMA) != 0)
577 mut_lock = std::unique_lock(*process->mailboxes_mutex());
579 if (not(smpi_cfg_async_small_thresh() != 0 || (flags_ & MPI_REQ_RMA) != 0)) {
580 mailbox = process->mailbox();
581 } else if (((flags_ & MPI_REQ_RMA) != 0) || static_cast<int>(size_) < smpi_cfg_async_small_thresh()) { // eager mode
582 bool is_probe = ((flags_ & MPI_REQ_PROBE) != 0);
583 flags_ |= MPI_REQ_PROBE;
585 mailbox = process->mailbox();
586 XBT_DEBUG("Is there a corresponding recv already posted in the large mailbox %s?", mailbox->get_cname());
587 if (not mailbox->iprobe(1, &match_send, static_cast<void*>(this))) {
588 if ((flags_ & MPI_REQ_SSEND) == 0) {
589 mailbox = process->mailbox_small();
590 XBT_DEBUG("No, nothing in the large mailbox, message is to be sent on the small one %s",
591 mailbox->get_cname());
593 mailbox = process->mailbox_small();
594 XBT_DEBUG("SSEND : Is there a corresponding recv already posted in the small mailbox %s?",
595 mailbox->get_cname());
596 if (not mailbox->iprobe(1, &match_send, static_cast<void*>(this))) {
597 XBT_DEBUG("No, we are first, send to large mailbox");
598 mailbox = process->mailbox();
602 XBT_DEBUG("Yes there was something for us in the large mailbox");
605 flags_ &= ~MPI_REQ_PROBE;
607 mailbox = process->mailbox();
608 XBT_DEBUG("Send request %p is in the large mailbox %s (buf: %p)", this, mailbox->get_cname(), buf_);
611 size_t payload_size_ = size_ + 16;//MPI enveloppe size (tag+dest+communicator)
612 kernel::actor::CommIsendSimcall observer{
613 simgrid::kernel::EngineImpl::get_instance()->get_actor_by_pid(src_), mailbox->get_impl(),
614 static_cast<double>(payload_size_), -1, static_cast<unsigned char*>(buf), real_size_, &match_send,
615 &xbt_free_f, // how to free the userdata if a detached send fails
616 process->replaying() ? &smpi_comm_null_copy_buffer_callback : smpi_comm_copy_data_callback, this,
617 // detach if msg size < eager/rdv switch limit
619 observer.set_tag(tag_);
620 action_ = kernel::actor::simcall_answered([&observer] { return kernel::activity::CommImpl::isend(&observer); },
622 XBT_DEBUG("send simcall posted");
624 /* FIXME: detached sends are not traceable (action_ == nullptr) */
625 if (action_ != nullptr) {
626 boost::static_pointer_cast<kernel::activity::CommImpl>(action_)->set_tracing_category(
627 smpi_process()->get_tracing_category());
632 void Request::startall(int count, MPI_Request * requests)
634 if(requests== nullptr)
637 for(int i = 0; i < count; i++) {
638 if(requests[i]->src_ != MPI_PROC_NULL && requests[i]->dst_ != MPI_PROC_NULL)
639 requests[i]->start();
643 void Request::cancel()
645 this->flags_ |= MPI_REQ_CANCELLED;
646 if (this->action_ != nullptr)
647 (boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(this->action_))->cancel();
650 int Request::test(MPI_Request * request, MPI_Status * status, int* flag) {
651 // assume that *request is not MPI_REQUEST_NULL (filtered in PMPI_Test or testall before)
652 // to avoid deadlocks if used as a break condition, such as
653 // while (MPI_Test(request, flag, status) && flag) dostuff...
654 // because the time will not normally advance when only calls to MPI_Test are made -> deadlock
655 // multiplier to the sleeptime, to increase speed of execution, each failed test will increase it
656 xbt_assert(*request != MPI_REQUEST_NULL);
658 static int nsleeps = 1;
659 int ret = MPI_SUCCESS;
661 if(smpi_test_sleep > 0)
662 simgrid::s4u::this_actor::sleep_for(nsleeps * smpi_test_sleep);
664 Status::empty(status);
667 if ((*request)->flags_ & MPI_REQ_NBC){
668 *flag = finish_nbc_requests(request, 1);
671 if (((*request)->flags_ & (MPI_REQ_PREPARED | MPI_REQ_FINISHED)) == 0) {
672 if ((*request)->action_ != nullptr && ((*request)->flags_ & MPI_REQ_CANCELLED) == 0){
674 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
675 kernel::actor::ActivityTestSimcall observer{issuer, (*request)->action_.get()};
676 *flag = kernel::actor::simcall_answered(
677 [&observer] { return observer.get_activity()->test(observer.get_issuer()); }, &observer);
678 } catch (const Exception&) {
683 if (((*request)->flags_ & MPI_REQ_GENERALIZED) && not((*request)->flags_ & MPI_REQ_COMPLETE))
686 finish_wait(request, status); // may invalidate *request
687 if (*request != MPI_REQUEST_NULL && ((*request)->flags_ & MPI_REQ_GENERALIZED)){
688 MPI_Status tmp_status;
689 MPI_Status* mystatus;
690 if (status == MPI_STATUS_IGNORE) {
691 mystatus = &tmp_status;
692 Status::empty(mystatus);
696 ret = ((*request)->generalized_funcs)->query_fn(((*request)->generalized_funcs)->extra_state, mystatus);
698 nsleeps=1;//reset the number of sleeps we will do next time
699 if (*request != MPI_REQUEST_NULL && ((*request)->flags_ & MPI_REQ_PERSISTENT) == 0)
700 *request = MPI_REQUEST_NULL;
701 } else if (smpi_cfg_grow_injected_times()) {
708 int Request::testsome(int incount, MPI_Request requests[], int *count, int *indices, MPI_Status status[])
714 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
717 for (int i = 0; i < incount; i++) {
718 if (requests[i] != MPI_REQUEST_NULL && not (requests[i]->flags_ & MPI_REQ_FINISHED)) {
719 if (test(&requests[i], pstat, &flag) != MPI_SUCCESS)
723 if (status != MPI_STATUSES_IGNORE)
724 status[*count] = *pstat;
726 if ((requests[i] != MPI_REQUEST_NULL) && (requests[i]->flags_ & MPI_REQ_NON_PERSISTENT))
727 requests[i] = MPI_REQUEST_NULL;
733 if(count_dead==incount)*count=MPI_UNDEFINED;
735 return MPI_ERR_IN_STATUS;
740 int Request::testany(int count, MPI_Request requests[], int *index, int* flag, MPI_Status * status)
742 std::vector<simgrid::kernel::activity::ActivityImpl*> comms;
743 comms.reserve(count);
746 int ret = MPI_SUCCESS;
747 *index = MPI_UNDEFINED;
749 std::vector<int> map; /** Maps all matching comms back to their location in requests **/
750 for (int i = 0; i < count; i++) {
751 if ((requests[i] != MPI_REQUEST_NULL) && requests[i]->action_ && not(requests[i]->flags_ & MPI_REQ_PREPARED)) {
752 comms.push_back(requests[i]->action_.get());
756 if (not map.empty()) {
757 //multiplier to the sleeptime, to increase speed of execution, each failed testany will increase it
758 static int nsleeps = 1;
759 if(smpi_test_sleep > 0)
760 simgrid::s4u::this_actor::sleep_for(nsleeps * smpi_test_sleep);
763 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
764 kernel::actor::ActivityTestanySimcall observer{issuer, comms};
765 i = kernel::actor::simcall_answered(
767 return kernel::activity::ActivityImpl::test_any(observer.get_issuer(), observer.get_activities());
770 } catch (const Exception&) {
771 XBT_DEBUG("Exception in testany");
775 if (i != -1) { // -1 is not MPI_UNDEFINED but a SIMIX return code. (nothing matches)
777 if (requests[*index] != MPI_REQUEST_NULL && (requests[*index]->flags_ & MPI_REQ_GENERALIZED) &&
778 not(requests[*index]->flags_ & MPI_REQ_COMPLETE)) {
781 finish_wait(&requests[*index],status);
782 if (requests[*index] != MPI_REQUEST_NULL && (requests[*index]->flags_ & MPI_REQ_GENERALIZED)){
783 MPI_Status tmp_status;
784 MPI_Status* mystatus;
785 if (status == MPI_STATUS_IGNORE) {
786 mystatus = &tmp_status;
787 Status::empty(mystatus);
791 ret=(requests[*index]->generalized_funcs)->query_fn((requests[*index]->generalized_funcs)->extra_state, mystatus);
794 if (requests[*index] != MPI_REQUEST_NULL && requests[*index]->flags_ & MPI_REQ_NBC){
795 *flag = finish_nbc_requests(&requests[*index] , 1);
798 if (requests[*index] != MPI_REQUEST_NULL && (requests[*index]->flags_ & MPI_REQ_NON_PERSISTENT))
799 requests[*index] = MPI_REQUEST_NULL;
800 XBT_DEBUG("Testany - returning with index %d", *index);
808 XBT_DEBUG("Testany on inactive handles, returning flag=1 but empty status");
809 //all requests are null or inactive, return true
811 *index = MPI_UNDEFINED;
812 Status::empty(status);
818 int Request::testall(int count, MPI_Request requests[], int* outflag, MPI_Status status[])
821 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
825 for(int i=0; i<count; i++){
826 if (requests[i] != MPI_REQUEST_NULL && not(requests[i]->flags_ & MPI_REQ_PREPARED)) {
827 int ret = test(&requests[i], pstat, &flag);
833 if (ret != MPI_SUCCESS)
836 Status::empty(pstat);
838 if(status != MPI_STATUSES_IGNORE) {
843 return MPI_ERR_IN_STATUS;
848 void Request::probe(int source, int tag, MPI_Comm comm, MPI_Status* status){
850 //FIXME find another way to avoid busy waiting ?
851 // the issue here is that we have to wait on a nonexistent comm
853 iprobe(source, tag, comm, &flag, status);
854 XBT_DEBUG("Busy Waiting on probing : %d", flag);
858 void Request::iprobe(int source, int tag, MPI_Comm comm, int* flag, MPI_Status* status){
859 // to avoid deadlock, we have to sleep some time here, or the timer won't advance and we will only do iprobe simcalls
860 // especially when used as a break condition, such as while (MPI_Iprobe(...)) dostuff...
861 // nsleeps is a multiplier to the sleeptime, to increase speed of execution, each failed iprobe will increase it
862 // This can speed up the execution of certain applications by an order of magnitude, such as HPL
863 static int nsleeps = 1;
864 double speed = s4u::this_actor::get_host()->get_speed();
865 double maxrate = smpi_cfg_iprobe_cpu_usage();
867 new Request(nullptr, 0, MPI_CHAR, source == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : comm->group()->actor(source),
868 simgrid::s4u::this_actor::get_pid(), tag, comm, MPI_REQ_PERSISTENT | MPI_REQ_RECV | MPI_REQ_PROBE);
869 if (smpi_iprobe_sleep > 0) {
870 /** Compute the number of flops we will sleep **/
871 s4u::this_actor::exec_init(/*nsleeps: See comment above */ nsleeps *
872 /*(seconds * flop/s -> total flops)*/ smpi_iprobe_sleep * speed * maxrate)
874 /* Not the entire CPU can be used when iprobing: This is important for
875 * the energy consumption caused by polling with iprobes.
876 * Note also that the number of flops that was
877 * computed above contains a maxrate factor and is hence reduced (maxrate < 1)
879 ->set_bound(maxrate * speed)
883 // behave like a receive, but don't do it
884 s4u::Mailbox* mailbox;
886 request->print_request("New iprobe");
887 // We have to test both mailboxes as we don't know if we will receive one or another
888 if (smpi_cfg_async_small_thresh() > 0) {
889 mailbox = smpi_process()->mailbox_small();
890 XBT_DEBUG("Trying to probe the perm recv mailbox");
891 request->action_ = mailbox->iprobe(0, &match_recv, static_cast<void*>(request));
894 if (request->action_ == nullptr){
895 mailbox = smpi_process()->mailbox();
896 XBT_DEBUG("trying to probe the other mailbox");
897 request->action_ = mailbox->iprobe(0, &match_recv, static_cast<void*>(request));
900 if (request->action_ != nullptr){
901 kernel::activity::CommImplPtr sync_comm = boost::static_pointer_cast<kernel::activity::CommImpl>(request->action_);
902 const Request* req = static_cast<MPI_Request>(sync_comm->src_data_);
904 if (status != MPI_STATUS_IGNORE && (req->flags_ & MPI_REQ_PREPARED) == 0) {
905 status->MPI_SOURCE = comm->group()->rank(req->src_);
906 status->MPI_TAG = req->tag_;
907 status->MPI_ERROR = MPI_SUCCESS;
908 status->count = req->real_size_;
910 nsleeps = 1;//reset the number of sleeps we will do next time
914 if (smpi_cfg_grow_injected_times())
918 xbt_assert(request == MPI_REQUEST_NULL);
921 int Request::finish_nbc_requests(MPI_Request* request, int test){
925 ret = waitall((*request)->nbc_requests_.size(), (*request)->nbc_requests_.data(), MPI_STATUSES_IGNORE);
927 ret = testall((*request)->nbc_requests_.size(), (*request)->nbc_requests_.data(), &flag, MPI_STATUSES_IGNORE);
930 xbt_die("Failure when waiting on non blocking collective sub-requests");
932 XBT_DEBUG("Finishing non blocking collective request with %zu sub-requests", (*request)->nbc_requests_.size());
933 for(auto& req: (*request)->nbc_requests_){
934 if((*request)->buf_!=nullptr && req!=MPI_REQUEST_NULL){//reduce case
935 void * buf=req->buf_;
936 if((*request)->type_->flags() & DT_FLAG_DERIVED)
938 if(req->flags_ & MPI_REQ_RECV ){
939 if((*request)->op_!=MPI_OP_NULL){
940 int count=(*request)->size_/ (*request)->type_->size();
941 (*request)->op_->apply(buf, (*request)->buf_, &count, (*request)->type_);
943 smpi_free_tmp_buffer(static_cast<unsigned char*>(buf));
946 if(req!=MPI_REQUEST_NULL)
947 Request::unref(&req);
949 (*request)->nbc_requests_.clear();
954 void Request::finish_wait(MPI_Request* request, MPI_Status * status)
956 MPI_Request req = *request;
957 Status::empty(status);
958 if((req->flags_ & MPI_REQ_CANCELLED) != 0 && (req->flags_ & MPI_REQ_MATCHED) == 0) {
959 if (status!=MPI_STATUS_IGNORE)
961 if(req->detached_sender_ != nullptr)
962 unref(&(req->detached_sender_));
967 if ((req->flags_ & (MPI_REQ_PREPARED | MPI_REQ_GENERALIZED | MPI_REQ_FINISHED)) == 0) {
968 if (status != MPI_STATUS_IGNORE) {
969 if (req->src_== MPI_PROC_NULL || req->dst_== MPI_PROC_NULL){
970 Status::empty(status);
971 status->MPI_SOURCE = MPI_PROC_NULL;
973 aid_t src = req->src_ == MPI_ANY_SOURCE ? req->real_src_ : req->src_;
974 status->MPI_SOURCE = req->comm_->group()->rank(src);
975 status->MPI_TAG = req->tag_ == MPI_ANY_TAG ? req->real_tag_ : req->tag_;
976 status->MPI_ERROR = req->truncated_ ? MPI_ERR_TRUNCATE : MPI_SUCCESS;
978 // this handles the case were size in receive differs from size in send
979 status->count = req->real_size_;
981 //detached send will be finished at the other end
982 if (not(req->detached_ && ((req->flags_ & MPI_REQ_SEND) != 0))) {
983 req->print_request("Finishing");
984 MPI_Datatype datatype = req->type_;
986 // FIXME Handle the case of a partial shared malloc.
987 if (not smpi_process()->replaying() &&
988 (((req->flags_ & MPI_REQ_ACCUMULATE) != 0) || (datatype->flags() & DT_FLAG_DERIVED))) {
989 if (smpi_switch_data_segment(simgrid::s4u::Actor::self(), req->old_buf_))
990 XBT_VERB("Privatization : We are unserializing to a zone in global memory Switch data segment ");
992 if(datatype->flags() & DT_FLAG_DERIVED){
993 // This part handles the problem of non-contiguous memory the unserialization at the reception
994 if ((req->flags_ & MPI_REQ_RECV) && datatype->size() != 0)
995 datatype->unserialize(req->buf_, req->old_buf_, req->real_size_/datatype->size() , req->op_);
998 } else if (req->flags_ & MPI_REQ_RECV) { // apply op on contiguous buffer for accumulate
999 if (datatype->size() != 0) {
1000 int n = req->real_size_ / datatype->size();
1001 req->op_->apply(req->buf_, req->old_buf_, &n, datatype);
1003 xbt_free(req->buf_);
1010 if (TRACE_smpi_view_internals() && ((req->flags_ & MPI_REQ_RECV) != 0)) {
1011 aid_t rank = simgrid::s4u::this_actor::get_pid();
1012 aid_t src_traced = (req->src_ == MPI_ANY_SOURCE ? req->real_src_ : req->src_);
1013 TRACE_smpi_recv(src_traced, rank,req->tag_);
1015 if(req->detached_sender_ != nullptr){
1016 //integrate pseudo-timing for buffering of small messages, do not bother to execute the simcall if 0
1017 simgrid::s4u::Host* dst_host = simgrid::s4u::Actor::by_pid(req->dst_)->get_host();
1018 if (double sleeptime = simgrid::s4u::Actor::self()->get_host()->extension<simgrid::smpi::Host>()->orecv(
1019 req->real_size(), req->src_host_, dst_host);
1021 simgrid::s4u::this_actor::sleep_for(sleeptime);
1022 XBT_DEBUG("receiving size of %zu : sleep %f ", req->real_size_, sleeptime);
1024 unref(&(req->detached_sender_));
1026 if (req->flags_ & MPI_REQ_PERSISTENT)
1027 req->action_ = nullptr;
1028 req->flags_ |= MPI_REQ_FINISHED;
1030 if (req->truncated_ || req->unmatched_types_) {
1031 char error_string[MPI_MAX_ERROR_STRING];
1034 if(req->truncated_ )
1035 errkind = MPI_ERR_TRUNCATE;
1037 errkind = MPI_ERR_TYPE;
1038 PMPI_Error_string(errkind, error_string, &error_size);
1039 MPI_Errhandler err = (req->comm_) ? (req->comm_)->errhandler() : MPI_ERRHANDLER_NULL;
1040 if (err == MPI_ERRHANDLER_NULL || err == MPI_ERRORS_RETURN)
1041 XBT_WARN("recv - returned %.*s instead of MPI_SUCCESS", error_size, error_string);
1042 else if (err == MPI_ERRORS_ARE_FATAL)
1043 xbt_die("recv - returned %.*s instead of MPI_SUCCESS", error_size, error_string);
1045 err->call((req->comm_), errkind);
1046 if (err != MPI_ERRHANDLER_NULL)
1047 simgrid::smpi::Errhandler::unref(err);
1048 MC_assert(not MC_is_active()); /* Only fail in MC mode */
1050 if(req->src_ != MPI_PROC_NULL && req->dst_ != MPI_PROC_NULL)
1054 int Request::wait(MPI_Request * request, MPI_Status * status)
1056 // assume that *request is not MPI_REQUEST_NULL (filtered in PMPI_Wait before)
1057 xbt_assert(*request != MPI_REQUEST_NULL);
1059 int ret=MPI_SUCCESS;
1061 if((*request)->src_ == MPI_PROC_NULL || (*request)->dst_ == MPI_PROC_NULL){
1062 if (status != MPI_STATUS_IGNORE) {
1063 Status::empty(status);
1064 status->MPI_SOURCE = MPI_PROC_NULL;
1066 (*request)=MPI_REQUEST_NULL;
1070 (*request)->print_request("Waiting");
1071 if ((*request)->flags_ & (MPI_REQ_PREPARED | MPI_REQ_FINISHED)) {
1072 Status::empty(status);
1076 if ((*request)->action_ != nullptr){
1078 // this is not a detached send
1079 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
1080 kernel::actor::ActivityWaitSimcall observer{issuer, (*request)->action_.get(), -1};
1081 kernel::actor::simcall_blocking([issuer, &observer] { observer.get_activity()->wait_for(issuer, -1); },
1083 } catch (const CancelException&) {
1084 XBT_VERB("Request cancelled");
1088 if ((*request)->flags_ & MPI_REQ_GENERALIZED) {
1089 if (not((*request)->flags_ & MPI_REQ_COMPLETE)) {
1090 const std::scoped_lock lock(*(*request)->generalized_funcs->mutex);
1091 (*request)->generalized_funcs->cond->wait((*request)->generalized_funcs->mutex);
1093 MPI_Status tmp_status;
1094 MPI_Status* mystatus;
1095 if (status == MPI_STATUS_IGNORE) {
1096 mystatus = &tmp_status;
1097 Status::empty(mystatus);
1101 ret = ((*request)->generalized_funcs)->query_fn(((*request)->generalized_funcs)->extra_state, mystatus);
1104 if ((*request)->truncated_)
1105 ret = MPI_ERR_TRUNCATE;
1107 if ((*request)->flags_ & MPI_REQ_NBC)
1108 finish_nbc_requests(request, 0);
1110 finish_wait(request, status); // may invalidate *request
1111 if (*request != MPI_REQUEST_NULL && (((*request)->flags_ & MPI_REQ_NON_PERSISTENT) != 0))
1112 *request = MPI_REQUEST_NULL;
1116 int Request::waitany(int count, MPI_Request requests[], MPI_Status * status)
1118 int index = MPI_UNDEFINED;
1121 // Wait for a request to complete
1122 std::vector<simgrid::kernel::activity::ActivityImpl*> comms;
1123 std::vector<int> map;
1124 XBT_DEBUG("Wait for one of %d", count);
1125 for(int i = 0; i < count; i++) {
1126 if (requests[i] != MPI_REQUEST_NULL && not(requests[i]->flags_ & MPI_REQ_PREPARED) &&
1127 not(requests[i]->flags_ & MPI_REQ_FINISHED)) {
1128 if (requests[i]->action_ != nullptr) {
1129 XBT_DEBUG("Waiting any %p ", requests[i]);
1130 comms.push_back(requests[i]->action_.get());
1133 // This is a finished detached request, let's return this one
1134 comms.clear(); // don't do the waitany call afterwards
1136 if (requests[index]->flags_ & MPI_REQ_NBC)
1137 finish_nbc_requests(&requests[index], 0);
1138 finish_wait(&requests[i], status); // cleanup if refcount = 0
1139 if (requests[i] != MPI_REQUEST_NULL && (requests[i]->flags_ & MPI_REQ_NON_PERSISTENT))
1140 requests[i] = MPI_REQUEST_NULL; // set to null
1145 if (not comms.empty()) {
1146 XBT_DEBUG("Enter waitany for %zu comms", comms.size());
1149 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
1150 kernel::actor::ActivityWaitanySimcall observer{issuer, comms, -1};
1151 i = kernel::actor::simcall_blocking(
1153 kernel::activity::ActivityImpl::wait_any_for(observer.get_issuer(), observer.get_activities(),
1154 observer.get_timeout());
1157 } catch (const CancelException&) {
1158 XBT_INFO("request cancelled");
1162 // not MPI_UNDEFINED, as this is a simix return code
1165 //in case of an accumulate, we have to wait the end of all requests to apply the operation, ordered correctly.
1166 if ((requests[index] == MPI_REQUEST_NULL) ||
1167 (not((requests[index]->flags_ & MPI_REQ_ACCUMULATE) && (requests[index]->flags_ & MPI_REQ_RECV)))) {
1168 finish_wait(&requests[index],status);
1169 if (requests[index] != MPI_REQUEST_NULL && (requests[index]->flags_ & MPI_REQ_NON_PERSISTENT))
1170 requests[index] = MPI_REQUEST_NULL;
1177 if (index==MPI_UNDEFINED)
1178 Status::empty(status);
1183 static int sort_accumulates(const Request* a, const Request* b)
1185 return (a->tag() > b->tag());
1188 int Request::waitall(int count, MPI_Request requests[], MPI_Status status[])
1190 std::vector<MPI_Request> accumulates;
1193 MPI_Status *pstat = (status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat);
1194 int retvalue = MPI_SUCCESS;
1195 //tag invalid requests in the set
1196 if (status != MPI_STATUSES_IGNORE) {
1197 for (int c = 0; c < count; c++) {
1198 if (requests[c] == MPI_REQUEST_NULL || requests[c]->dst_ == MPI_PROC_NULL ||
1199 (requests[c]->flags_ & MPI_REQ_PREPARED)) {
1200 Status::empty(&status[c]);
1201 } else if (requests[c]->src_ == MPI_PROC_NULL) {
1202 Status::empty(&status[c]);
1203 status[c].MPI_SOURCE = MPI_PROC_NULL;
1207 for (int c = 0; c < count; c++) {
1208 if (MC_is_active() || MC_record_replay_is_active()) {
1209 wait(&requests[c],pstat);
1212 index = waitany(count, requests, pstat);
1214 if (index == MPI_UNDEFINED)
1217 if (requests[index] != MPI_REQUEST_NULL && (requests[index]->flags_ & MPI_REQ_RECV) &&
1218 (requests[index]->flags_ & MPI_REQ_ACCUMULATE))
1219 accumulates.push_back(requests[index]);
1220 if (requests[index] != MPI_REQUEST_NULL && (requests[index]->flags_ & MPI_REQ_NON_PERSISTENT))
1221 requests[index] = MPI_REQUEST_NULL;
1223 if (status != MPI_STATUSES_IGNORE) {
1224 status[index] = *pstat;
1225 if (status[index].MPI_ERROR == MPI_ERR_TRUNCATE)
1226 retvalue = MPI_ERR_IN_STATUS;
1230 std::sort(accumulates.begin(), accumulates.end(), sort_accumulates);
1231 for (auto& req : accumulates)
1232 finish_wait(&req, status);
1237 int Request::waitsome(int incount, MPI_Request requests[], int *indices, MPI_Status status[])
1243 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
1244 index = waitany(incount, requests, pstat);
1245 if(index==MPI_UNDEFINED) return MPI_UNDEFINED;
1246 if(status != MPI_STATUSES_IGNORE) {
1247 status[count] = *pstat;
1249 indices[count] = index;
1251 for (int i = 0; i < incount; i++) {
1252 if (i != index && requests[i] != MPI_REQUEST_NULL && not(requests[i]->flags_ & MPI_REQ_FINISHED)) {
1253 test(&requests[i], pstat,&flag);
1256 if(status != MPI_STATUSES_IGNORE) {
1257 status[count] = *pstat;
1259 if (requests[i] != MPI_REQUEST_NULL && (requests[i]->flags_ & MPI_REQ_NON_PERSISTENT))
1260 requests[i]=MPI_REQUEST_NULL;
1268 MPI_Request Request::f2c(int id)
1270 if(id==MPI_FORTRAN_REQUEST_NULL)
1271 return MPI_REQUEST_NULL;
1272 return static_cast<MPI_Request>(F2C::lookup()->at(id));
1275 void Request::free_f(int id)
1277 if (id != MPI_FORTRAN_REQUEST_NULL) {
1278 F2C::lookup()->erase(id);
1282 int Request::get_status(const Request* req, int* flag, MPI_Status* status)
1284 if(req != MPI_REQUEST_NULL && req->action_ != nullptr) {
1285 req->iprobe(req->comm_->group()->rank(req->src_), req->tag_, req->comm_, flag, status);
1289 if (req != MPI_REQUEST_NULL && (req->flags_ & MPI_REQ_GENERALIZED) && not(req->flags_ & MPI_REQ_COMPLETE)) {
1295 if(req != MPI_REQUEST_NULL &&
1296 status != MPI_STATUS_IGNORE) {
1297 aid_t src = req->src_ == MPI_ANY_SOURCE ? req->real_src_ : req->src_;
1298 status->MPI_SOURCE = req->comm_->group()->rank(src);
1299 status->MPI_TAG = req->tag_ == MPI_ANY_TAG ? req->real_tag_ : req->tag_;
1300 status->MPI_ERROR = req->truncated_ ? MPI_ERR_TRUNCATE : MPI_SUCCESS;
1301 status->count = req->real_size_;
1306 int Request::grequest_start(MPI_Grequest_query_function* query_fn, MPI_Grequest_free_function* free_fn,
1307 MPI_Grequest_cancel_function* cancel_fn, void* extra_state, MPI_Request* request)
1309 *request = new Request();
1310 (*request)->flags_ |= MPI_REQ_GENERALIZED;
1311 (*request)->flags_ |= MPI_REQ_PERSISTENT;
1312 (*request)->refcount_ = 1;
1313 ((*request)->generalized_funcs) = std::make_unique<smpi_mpi_generalized_request_funcs_t>();
1314 ((*request)->generalized_funcs)->query_fn=query_fn;
1315 ((*request)->generalized_funcs)->free_fn=free_fn;
1316 ((*request)->generalized_funcs)->cancel_fn=cancel_fn;
1317 ((*request)->generalized_funcs)->extra_state=extra_state;
1318 ((*request)->generalized_funcs)->cond = simgrid::s4u::ConditionVariable::create();
1319 ((*request)->generalized_funcs)->mutex = simgrid::s4u::Mutex::create();
1323 int Request::grequest_complete(MPI_Request request)
1325 if ((not(request->flags_ & MPI_REQ_GENERALIZED)) || request->generalized_funcs->mutex == nullptr)
1326 return MPI_ERR_REQUEST;
1327 const std::scoped_lock lock(*request->generalized_funcs->mutex);
1328 request->flags_ |= MPI_REQ_COMPLETE; // in case wait would be called after complete
1329 request->generalized_funcs->cond->notify_one();
1333 void Request::start_nbc_requests(std::vector<MPI_Request> reqs){
1334 if (not reqs.empty()) {
1335 nbc_requests_ = reqs;
1336 Request::startall(reqs.size(), reqs.data());
1340 std::vector<MPI_Request> Request::get_nbc_requests() const
1342 return nbc_requests_;
1344 } // namespace simgrid::smpi