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/activity/CommImpl.hpp"
19 #include "src/kernel/actor/ActorImpl.hpp"
20 #include "src/kernel/actor/SimcallObserver.hpp"
21 #include "src/mc/mc_replay.hpp"
22 #include "src/smpi/include/smpi_actor.hpp"
27 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_request, smpi, "Logging specific to SMPI (request)");
29 static simgrid::config::Flag<double> smpi_iprobe_sleep(
30 "smpi/iprobe", "Minimum time to inject inside a call to MPI_Iprobe", 1e-4);
31 static simgrid::config::Flag<double> smpi_test_sleep(
32 "smpi/test", "Minimum time to inject inside a call to MPI_Test", 1e-4);
34 std::vector<s_smpi_factor_t> smpi_ois_values;
36 extern void (*smpi_comm_copy_data_callback)(simgrid::kernel::activity::CommImpl*, void*, size_t);
41 Request::Request(const void* buf, int count, MPI_Datatype datatype, aid_t src, aid_t dst, int tag, MPI_Comm comm,
42 unsigned flags, MPI_Op op)
43 : buf_(const_cast<void*>(buf))
46 , size_(datatype->size() * count)
56 if(op != MPI_REPLACE && op != MPI_OP_NULL)
60 detached_sender_ = nullptr;
62 // get src_host if it's available (src is valid)
63 auto src_process = simgrid::s4u::Actor::by_pid(src);
65 src_host_ = src_process->get_host();
67 unmatched_types_ = false;
70 if (flags & MPI_REQ_PERSISTENT)
83 void Request::unref(MPI_Request* request)
85 xbt_assert(*request != MPI_REQUEST_NULL, "freeing an already free request");
87 (*request)->refcount_--;
88 if ((*request)->refcount_ < 0) {
89 (*request)->print_request("wrong refcount");
90 xbt_die("Whoops, wrong refcount");
92 if ((*request)->refcount_ == 0) {
93 if ((*request)->flags_ & MPI_REQ_GENERALIZED) {
94 ((*request)->generalized_funcs)->free_fn(((*request)->generalized_funcs)->extra_state);
96 Comm::unref((*request)->comm_);
97 Datatype::unref((*request)->type_);
99 if ((*request)->op_ != MPI_REPLACE && (*request)->op_ != MPI_OP_NULL)
100 Op::unref(&(*request)->op_);
102 (*request)->print_request("Destroying");
103 F2C::free_f((*request)->f2c_id());
105 *request = MPI_REQUEST_NULL;
107 (*request)->print_request("Decrementing");
111 bool Request::match_types(MPI_Datatype stype, MPI_Datatype rtype){
113 if ((stype == rtype) ||
114 //byte and packed always match with anything
115 (stype == MPI_PACKED || rtype == MPI_PACKED || stype == MPI_BYTE || rtype == MPI_BYTE) ||
116 //complex datatypes - we don't properly match these yet, as it would mean checking each subtype recursively.
117 (stype->flags() & DT_FLAG_DERIVED || rtype->flags() & DT_FLAG_DERIVED) ||
118 //duplicated datatypes, check if underlying is ok
119 (stype->duplicated_datatype()!=MPI_DATATYPE_NULL && match_types(stype->duplicated_datatype(), rtype)) ||
120 (rtype->duplicated_datatype()!=MPI_DATATYPE_NULL && match_types(stype, rtype->duplicated_datatype())))
123 XBT_WARN("Mismatched datatypes : sending %s and receiving %s", stype->name().c_str(), rtype->name().c_str());
128 bool Request::match_common(MPI_Request req, MPI_Request sender, MPI_Request receiver)
130 xbt_assert(sender, "Cannot match against null sender");
131 xbt_assert(receiver, "Cannot match against null receiver");
132 XBT_DEBUG("Trying to match %s of sender src %ld against %ld, tag %d against %d, id %d against %d",
133 (req == receiver ? "send" : "recv"), sender->src_, receiver->src_, sender->tag_, receiver->tag_,
134 sender->comm_->id(), receiver->comm_->id());
136 if ((receiver->comm_->id() == MPI_UNDEFINED || sender->comm_->id() == MPI_UNDEFINED ||
137 receiver->comm_->id() == sender->comm_->id()) &&
138 ((receiver->src_ == MPI_ANY_SOURCE && (receiver->comm_->group()->rank(sender->src_) != MPI_UNDEFINED)) ||
139 receiver->src_ == sender->src_) &&
140 ((receiver->tag_ == MPI_ANY_TAG && sender->tag_ >= 0) || receiver->tag_ == sender->tag_)) {
141 // we match, we can transfer some values
142 if (receiver->src_ == MPI_ANY_SOURCE) {
143 receiver->real_src_ = sender->src_;
144 receiver->src_host_ = sender->src_host_;
146 if (receiver->tag_ == MPI_ANY_TAG)
147 receiver->real_tag_ = sender->tag_;
148 if ((receiver->flags_ & MPI_REQ_PROBE) == 0 && receiver->real_size_ < sender->real_size_) {
149 XBT_DEBUG("Truncating message - should not happen: receiver size : %zu < sender size : %zu", receiver->real_size_,
151 receiver->truncated_ = true;
153 //0-sized datatypes/counts should not interfere and match
154 if ( sender->real_size_ != 0 && receiver->real_size_ != 0 &&
155 !match_types(sender->type_, receiver->type_))
156 receiver->unmatched_types_ = true;
157 if (sender->detached_)
158 receiver->detached_sender_ = sender; // tie the sender to the receiver, as it is detached and has to be freed in
160 req->flags_ |= MPI_REQ_MATCHED; // mark as impossible to cancel anymore
161 XBT_DEBUG("match succeeded");
167 void Request::init_buffer(int count){
168 // FIXME Handle the case of a partial shared malloc.
169 // This part handles the problem of non-contiguous memory (for the unserialization at the reception)
170 if (not smpi_process()->replaying() &&
171 ((((flags_ & MPI_REQ_RECV) != 0) && ((flags_ & MPI_REQ_ACCUMULATE) != 0)) || (type_->flags() & DT_FLAG_DERIVED))) {
172 // This part handles the problem of non-contiguous memory
177 buf_ = xbt_malloc(count*type_->size());
178 if ((type_->flags() & DT_FLAG_DERIVED) && ((flags_ & MPI_REQ_SEND) != 0)) {
179 type_->serialize(old_buf_, buf_, count);
185 bool Request::match_recv(void* a, void* b, simgrid::kernel::activity::CommImpl*)
187 auto ref = static_cast<MPI_Request>(a);
188 auto req = static_cast<MPI_Request>(b);
189 bool match = match_common(req, req, ref);
190 if (not match || ref->comm_ == MPI_COMM_UNINITIALIZED || ref->comm_->is_smp_comm())
193 if (ref->comm_->get_received_messages_count(ref->comm_->group()->rank(req->src_),
194 ref->comm_->group()->rank(req->dst_), req->tag_) == req->message_id_) {
195 if (((ref->flags_ & MPI_REQ_PROBE) == 0) && ((req->flags_ & MPI_REQ_PROBE) == 0)) {
196 XBT_DEBUG("increasing count in comm %p, which was %u from pid %ld, to pid %ld with tag %d", ref->comm_,
197 ref->comm_->get_received_messages_count(ref->comm_->group()->rank(req->src_),
198 ref->comm_->group()->rank(req->dst_), req->tag_),
199 req->src_, req->dst_, req->tag_);
200 ref->comm_->increment_received_messages_count(ref->comm_->group()->rank(req->src_),
201 ref->comm_->group()->rank(req->dst_), req->tag_);
202 if (ref->real_size_ > req->real_size_) {
203 ref->real_size_ = req->real_size_;
208 req->flags_ &= ~MPI_REQ_MATCHED;
209 ref->detached_sender_ = nullptr;
210 XBT_DEBUG("Refusing to match message, as its ID is not the one I expect. in comm %p, %u != %u, "
211 "from pid %ld to pid %ld, with tag %d",
213 ref->comm_->get_received_messages_count(ref->comm_->group()->rank(req->src_),
214 ref->comm_->group()->rank(req->dst_), req->tag_),
215 req->message_id_, req->src_, req->dst_, req->tag_);
220 bool Request::match_send(void* a, void* b, simgrid::kernel::activity::CommImpl*)
222 auto ref = static_cast<MPI_Request>(a);
223 auto req = static_cast<MPI_Request>(b);
224 return match_common(req, ref, req);
227 void Request::print_request(const char* message) const
229 XBT_VERB("%s request %p [buf = %p, size = %zu, src = %ld, dst = %ld, tag = %d, flags = %x]", message, this, buf_,
230 size_, src_, dst_, tag_, flags_);
233 /* factories, to hide the internal flags from the caller */
234 MPI_Request Request::bsend_init(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
236 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
237 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
238 MPI_REQ_PERSISTENT | MPI_REQ_SEND | MPI_REQ_PREPARED | MPI_REQ_BSEND);
241 MPI_Request Request::send_init(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
243 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
244 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
245 MPI_REQ_PERSISTENT | MPI_REQ_SEND | MPI_REQ_PREPARED);
248 MPI_Request Request::ssend_init(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
250 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
251 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
252 MPI_REQ_PERSISTENT | MPI_REQ_SSEND | MPI_REQ_SEND | MPI_REQ_PREPARED);
255 MPI_Request Request::isend_init(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
257 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
258 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
259 MPI_REQ_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SEND | MPI_REQ_PREPARED);
262 MPI_Request Request::rma_send_init(const void *buf, int count, MPI_Datatype datatype, int src, int dst, int tag, MPI_Comm comm,
267 request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, comm->group()->actor(src),
268 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
269 MPI_REQ_RMA | MPI_REQ_NON_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SEND | MPI_REQ_PREPARED);
271 request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, comm->group()->actor(src),
272 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
273 MPI_REQ_RMA | MPI_REQ_NON_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SEND | MPI_REQ_PREPARED |
280 MPI_Request Request::recv_init(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm)
282 aid_t source = MPI_PROC_NULL;
283 if (src == MPI_ANY_SOURCE)
284 source = MPI_ANY_SOURCE;
285 else if (src != MPI_PROC_NULL)
286 source = comm->group()->actor(src);
287 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype,
289 simgrid::s4u::this_actor::get_pid(), tag, comm,
290 MPI_REQ_PERSISTENT | MPI_REQ_RECV | MPI_REQ_PREPARED);
293 MPI_Request Request::rma_recv_init(void *buf, int count, MPI_Datatype datatype, int src, int dst, int tag, MPI_Comm comm,
296 aid_t source = MPI_PROC_NULL;
297 if (src == MPI_ANY_SOURCE)
298 source = MPI_ANY_SOURCE;
299 else if (src != MPI_PROC_NULL)
300 source = comm->group()->actor(src);
303 request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, source,
304 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
305 MPI_REQ_RMA | MPI_REQ_NON_PERSISTENT | MPI_REQ_RECV | MPI_REQ_PREPARED);
308 new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, source,
309 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
310 MPI_REQ_RMA | MPI_REQ_NON_PERSISTENT | MPI_REQ_RECV | MPI_REQ_PREPARED | MPI_REQ_ACCUMULATE, op);
315 MPI_Request Request::irecv_init(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm)
317 aid_t source = MPI_PROC_NULL;
318 if (src == MPI_ANY_SOURCE)
319 source = MPI_ANY_SOURCE;
320 else if (src != MPI_PROC_NULL)
321 source = comm->group()->actor(src);
322 return new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype,
323 source, simgrid::s4u::this_actor::get_pid(), tag, comm,
324 MPI_REQ_PERSISTENT | MPI_REQ_RECV | MPI_REQ_PREPARED);
327 MPI_Request Request::ibsend(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
329 auto request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
330 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
331 MPI_REQ_NON_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SEND | MPI_REQ_BSEND);
332 if(dst != MPI_PROC_NULL)
337 MPI_Request Request::isend(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
339 auto request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
340 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
341 MPI_REQ_NON_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SEND);
342 if(dst != MPI_PROC_NULL)
347 MPI_Request Request::issend(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
349 auto request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
350 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
351 MPI_REQ_NON_PERSISTENT | MPI_REQ_ISEND | MPI_REQ_SSEND | MPI_REQ_SEND);
352 if(dst != MPI_PROC_NULL)
357 MPI_Request Request::irecv(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm)
359 aid_t source = MPI_PROC_NULL;
360 if (src == MPI_ANY_SOURCE)
361 source = MPI_ANY_SOURCE;
362 else if (src != MPI_PROC_NULL)
363 source = comm->group()->actor(src);
364 auto request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, source,
365 simgrid::s4u::this_actor::get_pid(), tag, comm, MPI_REQ_NON_PERSISTENT | MPI_REQ_RECV);
366 if(src != MPI_PROC_NULL)
371 int Request::recv(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm, MPI_Status * status)
373 MPI_Request request = irecv(buf, count, datatype, src, tag, comm);
374 int retval = wait(&request,status);
379 void Request::bsend(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
381 auto request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
382 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
383 MPI_REQ_NON_PERSISTENT | MPI_REQ_SEND | MPI_REQ_BSEND);
385 if(dst != MPI_PROC_NULL)
387 wait(&request, MPI_STATUS_IGNORE);
391 void Request::send(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
393 auto request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
394 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
395 MPI_REQ_NON_PERSISTENT | MPI_REQ_SEND);
396 if(dst != MPI_PROC_NULL)
398 wait(&request, MPI_STATUS_IGNORE);
402 void Request::ssend(const void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm)
404 auto request = new Request(buf == MPI_BOTTOM ? nullptr : buf, count, datatype, simgrid::s4u::this_actor::get_pid(),
405 dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL, tag, comm,
406 MPI_REQ_NON_PERSISTENT | MPI_REQ_SSEND | MPI_REQ_SEND);
408 if(dst != MPI_PROC_NULL)
410 wait(&request,MPI_STATUS_IGNORE);
414 void Request::sendrecv(const void *sendbuf, int sendcount, MPI_Datatype sendtype,int dst, int sendtag,
415 void *recvbuf, int recvcount, MPI_Datatype recvtype, int src, int recvtag,
416 MPI_Comm comm, MPI_Status * status)
418 aid_t source = MPI_PROC_NULL;
419 if (src == MPI_ANY_SOURCE)
420 source = MPI_ANY_SOURCE;
421 else if (src != MPI_PROC_NULL)
422 source = comm->group()->actor(src);
423 aid_t destination = dst != MPI_PROC_NULL ? comm->group()->actor(dst) : MPI_PROC_NULL;
425 std::array<MPI_Request, 2> requests;
426 std::array<MPI_Status, 2> stats;
427 aid_t myid = simgrid::s4u::this_actor::get_pid();
428 if ((destination == myid) && (source == myid)) {
429 Datatype::copy(sendbuf, sendcount, sendtype, recvbuf, recvcount, recvtype);
430 if (status != MPI_STATUS_IGNORE) {
431 status->MPI_SOURCE = source;
432 status->MPI_TAG = recvtag;
433 status->MPI_ERROR = MPI_SUCCESS;
434 status->count = sendcount * sendtype->size();
438 requests[0] = isend_init(sendbuf, sendcount, sendtype, dst, sendtag, comm);
439 requests[1] = irecv_init(recvbuf, recvcount, recvtype, src, recvtag, comm);
440 startall(2, requests.data());
441 waitall(2, requests.data(), stats.data());
444 if(status != MPI_STATUS_IGNORE) {
445 // Copy receive status
450 void Request::start()
452 s4u::Mailbox* mailbox;
454 xbt_assert(action_ == nullptr, "Cannot (re-)start unfinished communication");
455 //reinitialize temporary buffer for persistent requests
456 if(real_size_ > 0 && flags_ & MPI_REQ_FINISHED){
458 init_buffer(real_size_/type_->size());
460 flags_ &= ~MPI_REQ_PREPARED;
461 flags_ &= ~MPI_REQ_FINISHED;
464 // we make a copy here, as the size is modified by simix, and we may reuse the request in another receive later
466 if ((flags_ & MPI_REQ_RECV) != 0) {
467 this->print_request("New recv");
469 simgrid::smpi::ActorExt* process = smpi_process_remote(simgrid::s4u::Actor::by_pid(dst_));
471 simgrid::s4u::MutexPtr mut = process->mailboxes_mutex();
472 if (smpi_cfg_async_small_thresh() != 0 || (flags_ & MPI_REQ_RMA) != 0)
475 bool is_probe = ((flags_ & MPI_REQ_PROBE) != 0);
476 flags_ |= MPI_REQ_PROBE;
478 if (smpi_cfg_async_small_thresh() == 0 && (flags_ & MPI_REQ_RMA) == 0) {
479 mailbox = process->mailbox();
480 } else if (((flags_ & MPI_REQ_RMA) != 0) || static_cast<int>(size_) < smpi_cfg_async_small_thresh()) {
481 //We have to check both mailboxes (because SSEND messages are sent to the large mbox).
482 //begin with the more appropriate one : the small one.
483 mailbox = process->mailbox_small();
484 XBT_DEBUG("Is there a corresponding send already posted in the small mailbox %s (in case of SSEND)?",
485 mailbox->get_cname());
486 simgrid::kernel::activity::ActivityImplPtr action = mailbox->iprobe(0, &match_recv, static_cast<void*>(this));
488 if (action == nullptr) {
489 mailbox = process->mailbox();
490 XBT_DEBUG("No, nothing in the small mailbox test the other one : %s", mailbox->get_cname());
491 action = mailbox->iprobe(0, &match_recv, static_cast<void*>(this));
492 if (action == nullptr) {
493 XBT_DEBUG("Still nothing, switch back to the small mailbox : %s", mailbox->get_cname());
494 mailbox = process->mailbox_small();
497 XBT_DEBUG("yes there was something for us in the small mailbox");
500 mailbox = process->mailbox_small();
501 XBT_DEBUG("Is there a corresponding send already posted the small mailbox?");
502 simgrid::kernel::activity::ActivityImplPtr action = mailbox->iprobe(0, &match_recv, static_cast<void*>(this));
504 if (action == nullptr) {
505 XBT_DEBUG("No, nothing in the permanent receive mailbox");
506 mailbox = process->mailbox();
508 XBT_DEBUG("yes there was something for us in the small mailbox");
512 flags_ &= ~MPI_REQ_PROBE;
513 kernel::actor::CommIrecvSimcall observer{process->get_actor()->get_impl(),
515 static_cast<unsigned char*>(buf_),
518 process->replaying() ? &smpi_comm_null_copy_buffer_callback
519 : smpi_comm_copy_data_callback,
523 action_ = kernel::actor::simcall([&observer] { return kernel::activity::CommImpl::irecv(&observer); }, &observer);
525 XBT_DEBUG("recv simcall posted");
527 if (smpi_cfg_async_small_thresh() != 0 || (flags_ & MPI_REQ_RMA) != 0)
529 } else { /* the RECV flag was not set, so this is a send */
530 const simgrid::smpi::ActorExt* process = smpi_process_remote(simgrid::s4u::Actor::by_pid(dst_));
531 xbt_assert(process, "Actor pid=%ld is gone??", dst_);
532 if (TRACE_smpi_view_internals())
533 TRACE_smpi_send(src_, src_, dst_, tag_, size_);
534 this->print_request("New send");
536 message_id_=comm_->get_sent_messages_count(comm_->group()->rank(src_), comm_->group()->rank(dst_), tag_);
537 comm_->increment_sent_messages_count(comm_->group()->rank(src_), comm_->group()->rank(dst_), tag_);
540 if ((flags_ & MPI_REQ_SSEND) == 0 &&
541 ((flags_ & MPI_REQ_RMA) != 0 || (flags_ & MPI_REQ_BSEND) != 0 ||
542 static_cast<int>(size_) < smpi_cfg_detached_send_thresh())) {
543 void *oldbuf = nullptr;
545 XBT_DEBUG("Send request %p is detached", this);
547 if (not(type_->flags() & DT_FLAG_DERIVED)) {
549 if (not process->replaying() && oldbuf != nullptr && size_ != 0) {
550 if (smpi_switch_data_segment(simgrid::s4u::Actor::by_pid(src_), buf_))
551 XBT_DEBUG("Privatization : We are sending from a zone inside global memory. Switch data segment ");
553 //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
554 //so actually ... don't use manually attached buffer space.
555 buf = xbt_malloc(size_);
556 memcpy(buf,oldbuf,size_);
557 XBT_DEBUG("buf %p copied into %p",oldbuf,buf);
562 //if we are giving back the control to the user without waiting for completion, we have to inject timings
563 double sleeptime = 0.0;
564 if (detached_ || ((flags_ & (MPI_REQ_ISEND | MPI_REQ_SSEND)) != 0)) { // issend should be treated as isend
565 // isend and send timings may be different
567 ((flags_ & MPI_REQ_ISEND) != 0)
568 ? simgrid::s4u::Actor::self()->get_host()->extension<simgrid::smpi::Host>()->oisend(
569 size_, simgrid::s4u::Actor::by_pid(src_)->get_host(), simgrid::s4u::Actor::by_pid(dst_)->get_host())
570 : simgrid::s4u::Actor::self()->get_host()->extension<simgrid::smpi::Host>()->osend(
571 size_, simgrid::s4u::Actor::by_pid(src_)->get_host(),
572 simgrid::s4u::Actor::by_pid(dst_)->get_host());
576 simgrid::s4u::this_actor::sleep_for(sleeptime);
577 XBT_DEBUG("sending size of %zu : sleep %f ", size_, sleeptime);
580 simgrid::s4u::MutexPtr mut = process->mailboxes_mutex();
582 if (smpi_cfg_async_small_thresh() != 0 || (flags_ & MPI_REQ_RMA) != 0)
585 if (not(smpi_cfg_async_small_thresh() != 0 || (flags_ & MPI_REQ_RMA) != 0)) {
586 mailbox = process->mailbox();
587 } else if (((flags_ & MPI_REQ_RMA) != 0) || static_cast<int>(size_) < smpi_cfg_async_small_thresh()) { // eager mode
588 bool is_probe = ((flags_ & MPI_REQ_PROBE) != 0);
589 flags_ |= MPI_REQ_PROBE;
591 mailbox = process->mailbox();
592 XBT_DEBUG("Is there a corresponding recv already posted in the large mailbox %s?", mailbox->get_cname());
593 simgrid::kernel::activity::ActivityImplPtr action = mailbox->iprobe(1, &match_send, static_cast<void*>(this));
594 if (action == nullptr) {
595 if ((flags_ & MPI_REQ_SSEND) == 0) {
596 mailbox = process->mailbox_small();
597 XBT_DEBUG("No, nothing in the large mailbox, message is to be sent on the small one %s",
598 mailbox->get_cname());
600 mailbox = process->mailbox_small();
601 XBT_DEBUG("SSEND : Is there a corresponding recv already posted in the small mailbox %s?",
602 mailbox->get_cname());
603 action = mailbox->iprobe(1, &match_send, static_cast<void*>(this));
604 if (action == nullptr) {
605 XBT_DEBUG("No, we are first, send to large mailbox");
606 mailbox = process->mailbox();
610 XBT_DEBUG("Yes there was something for us in the large mailbox");
613 flags_ &= ~MPI_REQ_PROBE;
615 mailbox = process->mailbox();
616 XBT_DEBUG("Send request %p is in the large mailbox %s (buf: %p)", this, mailbox->get_cname(), buf_);
619 size_t payload_size_ = size_ + 16;//MPI enveloppe size (tag+dest+communicator)
620 kernel::actor::CommIsendSimcall observer{
621 simgrid::kernel::actor::ActorImpl::by_pid(src_), mailbox->get_impl(), static_cast<double>(payload_size_), -1,
622 static_cast<unsigned char*>(buf), real_size_, &match_send,
623 &xbt_free_f, // how to free the userdata if a detached send fails
624 process->replaying() ? &smpi_comm_null_copy_buffer_callback : smpi_comm_copy_data_callback, this,
625 // detach if msg size < eager/rdv switch limit
627 action_ = kernel::actor::simcall([&observer] { return kernel::activity::CommImpl::isend(&observer); }, &observer);
628 XBT_DEBUG("send simcall posted");
630 /* FIXME: detached sends are not traceable (action_ == nullptr) */
631 if (action_ != nullptr) {
632 boost::static_pointer_cast<kernel::activity::CommImpl>(action_)->set_tracing_category(
633 smpi_process()->get_tracing_category());
636 if (smpi_cfg_async_small_thresh() != 0 || ((flags_ & MPI_REQ_RMA) != 0))
641 void Request::startall(int count, MPI_Request * requests)
643 if(requests== nullptr)
646 for(int i = 0; i < count; i++) {
647 if(requests[i]->src_ != MPI_PROC_NULL && requests[i]->dst_ != MPI_PROC_NULL)
648 requests[i]->start();
652 void Request::cancel()
654 this->flags_ |= MPI_REQ_CANCELLED;
655 if (this->action_ != nullptr)
656 (boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(this->action_))->cancel();
659 int Request::test(MPI_Request * request, MPI_Status * status, int* flag) {
660 // assume that *request is not MPI_REQUEST_NULL (filtered in PMPI_Test or testall before)
661 // to avoid deadlocks if used as a break condition, such as
662 // while (MPI_Test(request, flag, status) && flag) dostuff...
663 // because the time will not normally advance when only calls to MPI_Test are made -> deadlock
664 // multiplier to the sleeptime, to increase speed of execution, each failed test will increase it
665 xbt_assert(*request != MPI_REQUEST_NULL);
667 static int nsleeps = 1;
668 int ret = MPI_SUCCESS;
670 if(smpi_test_sleep > 0)
671 simgrid::s4u::this_actor::sleep_for(nsleeps * smpi_test_sleep);
673 Status::empty(status);
676 if ((*request)->flags_ & MPI_REQ_NBC){
677 *flag = finish_nbc_requests(request, 1);
680 if (((*request)->flags_ & (MPI_REQ_PREPARED | MPI_REQ_FINISHED)) == 0) {
681 if ((*request)->action_ != nullptr && ((*request)->flags_ & MPI_REQ_CANCELLED) == 0){
683 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
684 kernel::actor::ActivityTestSimcall observer{issuer, (*request)->action_.get()};
685 *flag = kernel::actor::simcall([&observer] { return observer.get_activity()->test(observer.get_issuer()); },
687 } catch (const Exception&) {
692 if (((*request)->flags_ & MPI_REQ_GENERALIZED) && not((*request)->flags_ & MPI_REQ_COMPLETE))
695 finish_wait(request, status); // may invalidate *request
696 if (*request != MPI_REQUEST_NULL && ((*request)->flags_ & MPI_REQ_GENERALIZED)){
697 MPI_Status tmp_status;
698 MPI_Status* mystatus;
699 if (status == MPI_STATUS_IGNORE) {
700 mystatus = &tmp_status;
701 Status::empty(mystatus);
705 ret = ((*request)->generalized_funcs)->query_fn(((*request)->generalized_funcs)->extra_state, mystatus);
707 nsleeps=1;//reset the number of sleeps we will do next time
708 if (*request != MPI_REQUEST_NULL && ((*request)->flags_ & MPI_REQ_PERSISTENT) == 0)
709 *request = MPI_REQUEST_NULL;
710 } else if (smpi_cfg_grow_injected_times()) {
717 int Request::testsome(int incount, MPI_Request requests[], int *count, int *indices, MPI_Status status[])
723 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
726 for (int i = 0; i < incount; i++) {
727 if (requests[i] != MPI_REQUEST_NULL && not (requests[i]->flags_ & MPI_REQ_FINISHED)) {
728 int ret = test(&requests[i], pstat, &flag);
733 if (status != MPI_STATUSES_IGNORE)
734 status[*count] = *pstat;
736 if ((requests[i] != MPI_REQUEST_NULL) && (requests[i]->flags_ & MPI_REQ_NON_PERSISTENT))
737 requests[i] = MPI_REQUEST_NULL;
743 if(count_dead==incount)*count=MPI_UNDEFINED;
745 return MPI_ERR_IN_STATUS;
750 int Request::testany(int count, MPI_Request requests[], int *index, int* flag, MPI_Status * status)
752 std::vector<simgrid::kernel::activity::ActivityImpl*> comms;
753 comms.reserve(count);
756 int ret = MPI_SUCCESS;
757 *index = MPI_UNDEFINED;
759 std::vector<int> map; /** Maps all matching comms back to their location in requests **/
760 for (int i = 0; i < count; i++) {
761 if ((requests[i] != MPI_REQUEST_NULL) && requests[i]->action_ && not(requests[i]->flags_ & MPI_REQ_PREPARED)) {
762 comms.push_back(requests[i]->action_.get());
766 if (not map.empty()) {
767 //multiplier to the sleeptime, to increase speed of execution, each failed testany will increase it
768 static int nsleeps = 1;
769 if(smpi_test_sleep > 0)
770 simgrid::s4u::this_actor::sleep_for(nsleeps * smpi_test_sleep);
773 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
774 kernel::actor::ActivityTestanySimcall observer{issuer, comms};
775 i = kernel::actor::simcall(
777 return kernel::activity::ActivityImpl::test_any(observer.get_issuer(), observer.get_activities());
780 } catch (const Exception&) {
781 XBT_DEBUG("Exception in testany");
785 if (i != -1) { // -1 is not MPI_UNDEFINED but a SIMIX return code. (nothing matches)
787 if (requests[*index] != MPI_REQUEST_NULL && (requests[*index]->flags_ & MPI_REQ_GENERALIZED) &&
788 not(requests[*index]->flags_ & MPI_REQ_COMPLETE)) {
791 finish_wait(&requests[*index],status);
792 if (requests[*index] != MPI_REQUEST_NULL && (requests[*index]->flags_ & MPI_REQ_GENERALIZED)){
793 MPI_Status tmp_status;
794 MPI_Status* mystatus;
795 if (status == MPI_STATUS_IGNORE) {
796 mystatus = &tmp_status;
797 Status::empty(mystatus);
801 ret=(requests[*index]->generalized_funcs)->query_fn((requests[*index]->generalized_funcs)->extra_state, mystatus);
804 if (requests[*index] != MPI_REQUEST_NULL && requests[*index]->flags_ & MPI_REQ_NBC){
805 *flag = finish_nbc_requests(&requests[*index] , 1);
808 if (requests[*index] != MPI_REQUEST_NULL && (requests[*index]->flags_ & MPI_REQ_NON_PERSISTENT))
809 requests[*index] = MPI_REQUEST_NULL;
810 XBT_DEBUG("Testany - returning with index %d", *index);
818 XBT_DEBUG("Testany on inactive handles, returning flag=1 but empty status");
819 //all requests are null or inactive, return true
821 *index = MPI_UNDEFINED;
822 Status::empty(status);
828 int Request::testall(int count, MPI_Request requests[], int* outflag, MPI_Status status[])
831 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
835 for(int i=0; i<count; i++){
836 if (requests[i] != MPI_REQUEST_NULL && not(requests[i]->flags_ & MPI_REQ_PREPARED)) {
837 int ret = test(&requests[i], pstat, &flag);
843 if (ret != MPI_SUCCESS)
846 Status::empty(pstat);
848 if(status != MPI_STATUSES_IGNORE) {
853 return MPI_ERR_IN_STATUS;
858 void Request::probe(int source, int tag, MPI_Comm comm, MPI_Status* status){
860 //FIXME find another way to avoid busy waiting ?
861 // the issue here is that we have to wait on a nonexistent comm
863 iprobe(source, tag, comm, &flag, status);
864 XBT_DEBUG("Busy Waiting on probing : %d", flag);
868 void Request::iprobe(int source, int tag, MPI_Comm comm, int* flag, MPI_Status* status){
869 // to avoid deadlock, we have to sleep some time here, or the timer won't advance and we will only do iprobe simcalls
870 // especially when used as a break condition, such as while (MPI_Iprobe(...)) dostuff...
871 // nsleeps is a multiplier to the sleeptime, to increase speed of execution, each failed iprobe will increase it
872 // This can speed up the execution of certain applications by an order of magnitude, such as HPL
873 static int nsleeps = 1;
874 double speed = s4u::this_actor::get_host()->get_speed();
875 double maxrate = smpi_cfg_iprobe_cpu_usage();
877 new Request(nullptr, 0, MPI_CHAR, source == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : comm->group()->actor(source),
878 simgrid::s4u::this_actor::get_pid(), tag, comm, MPI_REQ_PERSISTENT | MPI_REQ_RECV | MPI_REQ_PROBE);
879 if (smpi_iprobe_sleep > 0) {
880 /** Compute the number of flops we will sleep **/
881 s4u::this_actor::exec_init(/*nsleeps: See comment above */ nsleeps *
882 /*(seconds * flop/s -> total flops)*/ smpi_iprobe_sleep * speed * maxrate)
884 /* Not the entire CPU can be used when iprobing: This is important for
885 * the energy consumption caused by polling with iprobes.
886 * Note also that the number of flops that was
887 * computed above contains a maxrate factor and is hence reduced (maxrate < 1)
889 ->set_bound(maxrate * speed)
893 // behave like a receive, but don't do it
894 s4u::Mailbox* mailbox;
896 request->print_request("New iprobe");
897 // We have to test both mailboxes as we don't know if we will receive one or another
898 if (smpi_cfg_async_small_thresh() > 0) {
899 mailbox = smpi_process()->mailbox_small();
900 XBT_DEBUG("Trying to probe the perm recv mailbox");
901 request->action_ = mailbox->iprobe(0, &match_recv, static_cast<void*>(request));
904 if (request->action_ == nullptr){
905 mailbox = smpi_process()->mailbox();
906 XBT_DEBUG("trying to probe the other mailbox");
907 request->action_ = mailbox->iprobe(0, &match_recv, static_cast<void*>(request));
910 if (request->action_ != nullptr){
911 kernel::activity::CommImplPtr sync_comm = boost::static_pointer_cast<kernel::activity::CommImpl>(request->action_);
912 const Request* req = static_cast<MPI_Request>(sync_comm->src_data_);
914 if (status != MPI_STATUS_IGNORE && (req->flags_ & MPI_REQ_PREPARED) == 0) {
915 status->MPI_SOURCE = comm->group()->rank(req->src_);
916 status->MPI_TAG = req->tag_;
917 status->MPI_ERROR = MPI_SUCCESS;
918 status->count = req->real_size_;
920 nsleeps = 1;//reset the number of sleeps we will do next time
924 if (smpi_cfg_grow_injected_times())
928 xbt_assert(request == MPI_REQUEST_NULL);
931 int Request::finish_nbc_requests(MPI_Request* request, int test){
935 ret = waitall((*request)->nbc_requests_.size(), (*request)->nbc_requests_.data(), MPI_STATUSES_IGNORE);
937 ret = testall((*request)->nbc_requests_.size(), (*request)->nbc_requests_.data(), &flag, MPI_STATUSES_IGNORE);
940 xbt_die("Failure when waiting on non blocking collective sub-requests");
942 XBT_DEBUG("Finishing non blocking collective request with %zu sub-requests", (*request)->nbc_requests_.size());
943 for(auto& req: (*request)->nbc_requests_){
944 if((*request)->buf_!=nullptr && req!=MPI_REQUEST_NULL){//reduce case
945 void * buf=req->buf_;
946 if((*request)->type_->flags() & DT_FLAG_DERIVED)
948 if(req->flags_ & MPI_REQ_RECV ){
949 if((*request)->op_!=MPI_OP_NULL){
950 int count=(*request)->size_/ (*request)->type_->size();
951 (*request)->op_->apply(buf, (*request)->buf_, &count, (*request)->type_);
953 smpi_free_tmp_buffer(static_cast<unsigned char*>(buf));
956 if(req!=MPI_REQUEST_NULL)
957 Request::unref(&req);
959 (*request)->nbc_requests_.clear();
964 void Request::finish_wait(MPI_Request* request, MPI_Status * status)
966 MPI_Request req = *request;
967 Status::empty(status);
968 if((req->flags_ & MPI_REQ_CANCELLED) != 0 && (req->flags_ & MPI_REQ_MATCHED) == 0) {
969 if (status!=MPI_STATUS_IGNORE)
971 if(req->detached_sender_ != nullptr)
972 unref(&(req->detached_sender_));
977 if ((req->flags_ & (MPI_REQ_PREPARED | MPI_REQ_GENERALIZED | MPI_REQ_FINISHED)) == 0) {
978 if (status != MPI_STATUS_IGNORE) {
979 if (req->src_== MPI_PROC_NULL || req->dst_== MPI_PROC_NULL){
980 Status::empty(status);
981 status->MPI_SOURCE = MPI_PROC_NULL;
983 aid_t src = req->src_ == MPI_ANY_SOURCE ? req->real_src_ : req->src_;
984 status->MPI_SOURCE = req->comm_->group()->rank(src);
985 status->MPI_TAG = req->tag_ == MPI_ANY_TAG ? req->real_tag_ : req->tag_;
986 status->MPI_ERROR = req->truncated_ ? MPI_ERR_TRUNCATE : MPI_SUCCESS;
988 // this handles the case were size in receive differs from size in send
989 status->count = req->real_size_;
991 //detached send will be finished at the other end
992 if (not(req->detached_ && ((req->flags_ & MPI_REQ_SEND) != 0))) {
993 req->print_request("Finishing");
994 MPI_Datatype datatype = req->type_;
996 // FIXME Handle the case of a partial shared malloc.
997 if (not smpi_process()->replaying() &&
998 (((req->flags_ & MPI_REQ_ACCUMULATE) != 0) || (datatype->flags() & DT_FLAG_DERIVED))) {
999 if (smpi_switch_data_segment(simgrid::s4u::Actor::self(), req->old_buf_))
1000 XBT_VERB("Privatization : We are unserializing to a zone in global memory Switch data segment ");
1002 if(datatype->flags() & DT_FLAG_DERIVED){
1003 // This part handles the problem of non-contiguous memory the unserialization at the reception
1004 if ((req->flags_ & MPI_REQ_RECV) && datatype->size() != 0)
1005 datatype->unserialize(req->buf_, req->old_buf_, req->real_size_/datatype->size() , req->op_);
1006 xbt_free(req->buf_);
1008 } else if (req->flags_ & MPI_REQ_RECV) { // apply op on contiguous buffer for accumulate
1009 if (datatype->size() != 0) {
1010 int n = req->real_size_ / datatype->size();
1011 req->op_->apply(req->buf_, req->old_buf_, &n, datatype);
1013 xbt_free(req->buf_);
1020 if (TRACE_smpi_view_internals() && ((req->flags_ & MPI_REQ_RECV) != 0)) {
1021 aid_t rank = simgrid::s4u::this_actor::get_pid();
1022 aid_t src_traced = (req->src_ == MPI_ANY_SOURCE ? req->real_src_ : req->src_);
1023 TRACE_smpi_recv(src_traced, rank,req->tag_);
1025 if(req->detached_sender_ != nullptr){
1026 //integrate pseudo-timing for buffering of small messages, do not bother to execute the simcall if 0
1027 simgrid::s4u::Host* dst_host = simgrid::s4u::Actor::by_pid(req->dst_)->get_host();
1028 double sleeptime = simgrid::s4u::Actor::self()->get_host()->extension<simgrid::smpi::Host>()->orecv(
1029 req->real_size(), req->src_host_, dst_host);
1030 if (sleeptime > 0.0) {
1031 simgrid::s4u::this_actor::sleep_for(sleeptime);
1032 XBT_DEBUG("receiving size of %zu : sleep %f ", req->real_size_, sleeptime);
1034 unref(&(req->detached_sender_));
1036 if (req->flags_ & MPI_REQ_PERSISTENT)
1037 req->action_ = nullptr;
1038 req->flags_ |= MPI_REQ_FINISHED;
1040 if (req->truncated_ || req->unmatched_types_) {
1041 char error_string[MPI_MAX_ERROR_STRING];
1044 if(req->truncated_ )
1045 errkind = MPI_ERR_TRUNCATE;
1047 errkind = MPI_ERR_TYPE;
1048 PMPI_Error_string(errkind, error_string, &error_size);
1049 MPI_Errhandler err = (req->comm_) ? (req->comm_)->errhandler() : MPI_ERRHANDLER_NULL;
1050 if (err == MPI_ERRHANDLER_NULL || err == MPI_ERRORS_RETURN)
1051 XBT_WARN("recv - returned %.*s instead of MPI_SUCCESS", error_size, error_string);
1052 else if (err == MPI_ERRORS_ARE_FATAL)
1053 xbt_die("recv - returned %.*s instead of MPI_SUCCESS", error_size, error_string);
1055 err->call((req->comm_), errkind);
1056 if (err != MPI_ERRHANDLER_NULL)
1057 simgrid::smpi::Errhandler::unref(err);
1058 MC_assert(not MC_is_active()); /* Only fail in MC mode */
1060 if(req->src_ != MPI_PROC_NULL && req->dst_ != MPI_PROC_NULL)
1064 int Request::wait(MPI_Request * request, MPI_Status * status)
1066 // assume that *request is not MPI_REQUEST_NULL (filtered in PMPI_Wait before)
1067 xbt_assert(*request != MPI_REQUEST_NULL);
1069 int ret=MPI_SUCCESS;
1071 if((*request)->src_ == MPI_PROC_NULL || (*request)->dst_ == MPI_PROC_NULL){
1072 if (status != MPI_STATUS_IGNORE) {
1073 Status::empty(status);
1074 status->MPI_SOURCE = MPI_PROC_NULL;
1076 (*request)=MPI_REQUEST_NULL;
1080 (*request)->print_request("Waiting");
1081 if ((*request)->flags_ & (MPI_REQ_PREPARED | MPI_REQ_FINISHED)) {
1082 Status::empty(status);
1086 if ((*request)->action_ != nullptr){
1088 // this is not a detached send
1089 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
1090 kernel::actor::ActivityWaitSimcall observer{issuer, (*request)->action_.get(), -1};
1091 kernel::actor::simcall_blocking(
1092 [&observer] { observer.get_activity()->wait_for(observer.get_issuer(), observer.get_timeout()); },
1094 } catch (const CancelException&) {
1095 XBT_VERB("Request cancelled");
1099 if ((*request)->flags_ & MPI_REQ_GENERALIZED) {
1100 if (not((*request)->flags_ & MPI_REQ_COMPLETE)) {
1101 ((*request)->generalized_funcs)->mutex->lock();
1102 ((*request)->generalized_funcs)->cond->wait(((*request)->generalized_funcs)->mutex);
1103 ((*request)->generalized_funcs)->mutex->unlock();
1105 MPI_Status tmp_status;
1106 MPI_Status* mystatus;
1107 if (status == MPI_STATUS_IGNORE) {
1108 mystatus = &tmp_status;
1109 Status::empty(mystatus);
1113 ret = ((*request)->generalized_funcs)->query_fn(((*request)->generalized_funcs)->extra_state, mystatus);
1116 if ((*request)->truncated_)
1117 ret = MPI_ERR_TRUNCATE;
1119 if ((*request)->flags_ & MPI_REQ_NBC)
1120 finish_nbc_requests(request, 0);
1122 finish_wait(request, status); // may invalidate *request
1123 if (*request != MPI_REQUEST_NULL && (((*request)->flags_ & MPI_REQ_NON_PERSISTENT) != 0))
1124 *request = MPI_REQUEST_NULL;
1128 int Request::waitany(int count, MPI_Request requests[], MPI_Status * status)
1130 int index = MPI_UNDEFINED;
1133 // Wait for a request to complete
1134 std::vector<simgrid::kernel::activity::ActivityImpl*> comms;
1135 std::vector<int> map;
1136 XBT_DEBUG("Wait for one of %d", count);
1137 for(int i = 0; i < count; i++) {
1138 if (requests[i] != MPI_REQUEST_NULL && not(requests[i]->flags_ & MPI_REQ_PREPARED) &&
1139 not(requests[i]->flags_ & MPI_REQ_FINISHED)) {
1140 if (requests[i]->action_ != nullptr) {
1141 XBT_DEBUG("Waiting any %p ", requests[i]);
1142 comms.push_back(requests[i]->action_.get());
1145 // This is a finished detached request, let's return this one
1146 comms.clear(); // don't do the waitany call afterwards
1148 if (requests[index]->flags_ & MPI_REQ_NBC)
1149 finish_nbc_requests(&requests[index], 0);
1150 finish_wait(&requests[i], status); // cleanup if refcount = 0
1151 if (requests[i] != MPI_REQUEST_NULL && (requests[i]->flags_ & MPI_REQ_NON_PERSISTENT))
1152 requests[i] = MPI_REQUEST_NULL; // set to null
1157 if (not comms.empty()) {
1158 XBT_DEBUG("Enter waitany for %zu comms", comms.size());
1161 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
1162 kernel::actor::ActivityWaitanySimcall observer{issuer, comms, -1};
1163 i = kernel::actor::simcall_blocking(
1165 kernel::activity::ActivityImpl::wait_any_for(observer.get_issuer(), observer.get_activities(),
1166 observer.get_timeout());
1169 } catch (const CancelException&) {
1170 XBT_INFO("request cancelled");
1174 // not MPI_UNDEFINED, as this is a simix return code
1177 //in case of an accumulate, we have to wait the end of all requests to apply the operation, ordered correctly.
1178 if ((requests[index] == MPI_REQUEST_NULL) ||
1179 (not((requests[index]->flags_ & MPI_REQ_ACCUMULATE) && (requests[index]->flags_ & MPI_REQ_RECV)))) {
1180 finish_wait(&requests[index],status);
1181 if (requests[index] != MPI_REQUEST_NULL && (requests[index]->flags_ & MPI_REQ_NON_PERSISTENT))
1182 requests[index] = MPI_REQUEST_NULL;
1189 if (index==MPI_UNDEFINED)
1190 Status::empty(status);
1195 static int sort_accumulates(const Request* a, const Request* b)
1197 return (a->tag() > b->tag());
1200 int Request::waitall(int count, MPI_Request requests[], MPI_Status status[])
1202 std::vector<MPI_Request> accumulates;
1205 MPI_Status *pstat = (status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat);
1206 int retvalue = MPI_SUCCESS;
1207 //tag invalid requests in the set
1208 if (status != MPI_STATUSES_IGNORE) {
1209 for (int c = 0; c < count; c++) {
1210 if (requests[c] == MPI_REQUEST_NULL || requests[c]->dst_ == MPI_PROC_NULL ||
1211 (requests[c]->flags_ & MPI_REQ_PREPARED)) {
1212 Status::empty(&status[c]);
1213 } else if (requests[c]->src_ == MPI_PROC_NULL) {
1214 Status::empty(&status[c]);
1215 status[c].MPI_SOURCE = MPI_PROC_NULL;
1219 for (int c = 0; c < count; c++) {
1220 if (MC_is_active() || MC_record_replay_is_active()) {
1221 wait(&requests[c],pstat);
1224 index = waitany(count, requests, pstat);
1226 if (index == MPI_UNDEFINED)
1229 if (requests[index] != MPI_REQUEST_NULL && (requests[index]->flags_ & MPI_REQ_RECV) &&
1230 (requests[index]->flags_ & MPI_REQ_ACCUMULATE))
1231 accumulates.push_back(requests[index]);
1232 if (requests[index] != MPI_REQUEST_NULL && (requests[index]->flags_ & MPI_REQ_NON_PERSISTENT))
1233 requests[index] = MPI_REQUEST_NULL;
1235 if (status != MPI_STATUSES_IGNORE) {
1236 status[index] = *pstat;
1237 if (status[index].MPI_ERROR == MPI_ERR_TRUNCATE)
1238 retvalue = MPI_ERR_IN_STATUS;
1242 std::sort(accumulates.begin(), accumulates.end(), sort_accumulates);
1243 for (auto& req : accumulates)
1244 finish_wait(&req, status);
1249 int Request::waitsome(int incount, MPI_Request requests[], int *indices, MPI_Status status[])
1255 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
1256 index = waitany(incount, requests, pstat);
1257 if(index==MPI_UNDEFINED) return MPI_UNDEFINED;
1258 if(status != MPI_STATUSES_IGNORE) {
1259 status[count] = *pstat;
1261 indices[count] = index;
1263 for (int i = 0; i < incount; i++) {
1264 if (i != index && requests[i] != MPI_REQUEST_NULL && not(requests[i]->flags_ & MPI_REQ_FINISHED)) {
1265 test(&requests[i], pstat,&flag);
1268 if(status != MPI_STATUSES_IGNORE) {
1269 status[count] = *pstat;
1271 if (requests[i] != MPI_REQUEST_NULL && (requests[i]->flags_ & MPI_REQ_NON_PERSISTENT))
1272 requests[i]=MPI_REQUEST_NULL;
1280 MPI_Request Request::f2c(int id)
1282 if(id==MPI_FORTRAN_REQUEST_NULL)
1283 return MPI_REQUEST_NULL;
1284 return static_cast<MPI_Request>(F2C::lookup()->at(id));
1287 void Request::free_f(int id)
1289 if (id != MPI_FORTRAN_REQUEST_NULL) {
1290 F2C::lookup()->erase(id);
1294 int Request::get_status(const Request* req, int* flag, MPI_Status* status)
1298 if(req != MPI_REQUEST_NULL && req->action_ != nullptr) {
1299 req->iprobe(req->comm_->group()->rank(req->src_), req->tag_, req->comm_, flag, status);
1303 if (req != MPI_REQUEST_NULL && (req->flags_ & MPI_REQ_GENERALIZED) && not(req->flags_ & MPI_REQ_COMPLETE)) {
1309 if(req != MPI_REQUEST_NULL &&
1310 status != MPI_STATUS_IGNORE) {
1311 aid_t src = req->src_ == MPI_ANY_SOURCE ? req->real_src_ : req->src_;
1312 status->MPI_SOURCE = req->comm_->group()->rank(src);
1313 status->MPI_TAG = req->tag_ == MPI_ANY_TAG ? req->real_tag_ : req->tag_;
1314 status->MPI_ERROR = req->truncated_ ? MPI_ERR_TRUNCATE : MPI_SUCCESS;
1315 status->count = req->real_size_;
1320 int Request::grequest_start(MPI_Grequest_query_function* query_fn, MPI_Grequest_free_function* free_fn,
1321 MPI_Grequest_cancel_function* cancel_fn, void* extra_state, MPI_Request* request)
1323 *request = new Request();
1324 (*request)->flags_ |= MPI_REQ_GENERALIZED;
1325 (*request)->flags_ |= MPI_REQ_PERSISTENT;
1326 (*request)->refcount_ = 1;
1327 ((*request)->generalized_funcs) = std::make_unique<smpi_mpi_generalized_request_funcs_t>();
1328 ((*request)->generalized_funcs)->query_fn=query_fn;
1329 ((*request)->generalized_funcs)->free_fn=free_fn;
1330 ((*request)->generalized_funcs)->cancel_fn=cancel_fn;
1331 ((*request)->generalized_funcs)->extra_state=extra_state;
1332 ((*request)->generalized_funcs)->cond = simgrid::s4u::ConditionVariable::create();
1333 ((*request)->generalized_funcs)->mutex = simgrid::s4u::Mutex::create();
1337 int Request::grequest_complete(MPI_Request request)
1339 if ((not(request->flags_ & MPI_REQ_GENERALIZED)) || request->generalized_funcs->mutex == nullptr)
1340 return MPI_ERR_REQUEST;
1341 request->generalized_funcs->mutex->lock();
1342 request->flags_ |= MPI_REQ_COMPLETE; // in case wait would be called after complete
1343 request->generalized_funcs->cond->notify_one();
1344 request->generalized_funcs->mutex->unlock();
1348 void Request::start_nbc_requests(std::vector<MPI_Request> reqs){
1349 if (not reqs.empty()) {
1350 nbc_requests_ = reqs;
1351 Request::startall(reqs.size(), reqs.data());
1355 std::vector<MPI_Request> Request::get_nbc_requests() const
1357 return nbc_requests_;