1 /* Copyright (c) 2006-2022. 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 "src/msg/msg_private.hpp"
9 #include <simgrid/Exception.hpp>
10 #include <simgrid/comm.h>
11 #include <simgrid/s4u/Comm.hpp>
12 #include <simgrid/s4u/Engine.hpp>
13 #include <simgrid/s4u/Mailbox.hpp>
15 #include "src/kernel/activity/CommImpl.hpp"
16 #include "src/kernel/actor/ActorImpl.hpp"
17 #include "src/kernel/actor/SimcallObserver.hpp"
19 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_comm, s4u_activity, "S4U asynchronous communications");
23 xbt::signal<void(Comm const&)> Comm::on_send;
24 xbt::signal<void(Comm const&)> Comm::on_recv;
25 xbt::signal<void(Comm const&)> Comm::on_completion;
27 CommPtr Comm::set_copy_data_callback(void (*callback)(kernel::activity::CommImpl*, void*, size_t))
29 copy_data_function_ = callback;
33 void Comm::copy_buffer_callback(kernel::activity::CommImpl* comm, void* buff, size_t buff_size)
35 XBT_DEBUG("Copy the data over");
36 memcpy(comm->dst_buff_, buff, buff_size);
37 if (comm->detached()) { // if this is a detached send, the source buffer was duplicated by SMPI sender to make the
38 // original buffer available to the application ASAP
40 comm->src_buff_ = nullptr;
44 void Comm::copy_pointer_callback(kernel::activity::CommImpl* comm, void* buff, size_t buff_size)
46 xbt_assert((buff_size == sizeof(void*)), "Cannot copy %zu bytes: must be sizeof(void*)", buff_size);
47 *(void**)(comm->dst_buff_) = buff;
52 if (state_ == State::STARTED && not detached_ &&
53 (pimpl_ == nullptr || pimpl_->get_state() == kernel::activity::State::RUNNING)) {
54 XBT_INFO("Comm %p freed before its completion. Did you forget to detach it? (state: %s)", this, get_state_str());
55 if (pimpl_ != nullptr)
56 XBT_INFO("pimpl_->state: %s", pimpl_->get_state_str());
58 XBT_INFO("pimpl_ is null");
59 xbt_backtrace_display_current();
63 CommPtr Comm::sendto_init()
65 CommPtr res(new Comm());
66 res->sender_ = kernel::actor::ActorImpl::self();
70 CommPtr Comm::sendto_init(Host* from, Host* to)
72 auto res = Comm::sendto_init();
79 CommPtr Comm::sendto_async(Host* from, Host* to, uint64_t simulated_size_in_bytes)
81 auto res = Comm::sendto_init(from, to)->set_payload_size(simulated_size_in_bytes);
82 res->vetoable_start();
86 void Comm::sendto(Host* from, Host* to, uint64_t simulated_size_in_bytes)
88 sendto_async(from, to, simulated_size_in_bytes)->wait();
91 CommPtr Comm::set_source(Host* from)
93 xbt_assert(state_ == State::INITED || state_ == State::STARTING,
94 "Cannot change the source of a Comm once it's started (state: %s)", to_c_str(state_));
96 // Setting 'from_' may allow to start the activity, let's try
102 CommPtr Comm::set_destination(Host* to)
104 xbt_assert(state_ == State::INITED || state_ == State::STARTING,
105 "Cannot change the destination of a Comm once it's started (state: %s)", to_c_str(state_));
107 // Setting 'to_' may allow to start the activity, let's try
113 CommPtr Comm::set_rate(double rate)
115 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
121 CommPtr Comm::set_mailbox(Mailbox* mailbox)
123 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
129 CommPtr Comm::set_src_data(void* buff)
131 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
133 xbt_assert(dst_buff_ == nullptr, "Cannot set the src and dst buffers at the same time");
138 CommPtr Comm::set_src_data_size(size_t size)
140 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
142 src_buff_size_ = size;
146 CommPtr Comm::set_src_data(void* buff, size_t size)
148 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
151 xbt_assert(dst_buff_ == nullptr, "Cannot set the src and dst buffers at the same time");
153 src_buff_size_ = size;
157 CommPtr Comm::set_dst_data(void** buff)
159 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
161 xbt_assert(src_buff_ == nullptr, "Cannot set the src and dst buffers at the same time");
166 CommPtr Comm::set_dst_data(void** buff, size_t size)
168 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
171 xbt_assert(src_buff_ == nullptr, "Cannot set the src and dst buffers at the same time");
173 dst_buff_size_ = size;
177 CommPtr Comm::set_payload_size(uint64_t bytes)
179 Activity::set_remaining(bytes);
183 Actor* Comm::get_sender() const
185 kernel::actor::ActorImplPtr sender = nullptr;
187 sender = boost::static_pointer_cast<kernel::activity::CommImpl>(pimpl_)->src_actor_;
188 return sender ? sender->get_ciface() : nullptr;
193 xbt_assert(get_state() == State::INITED || get_state() == State::STARTING,
194 "You cannot use %s() once your communication started (not implemented)", __FUNCTION__);
195 if (from_ != nullptr || to_ != nullptr) {
196 xbt_assert(from_ != nullptr && to_ != nullptr, "When either from_ or to_ is specified, both must be.");
197 xbt_assert(src_buff_ == nullptr && dst_buff_ == nullptr,
198 "Direct host-to-host communications cannot carry any data.");
199 pimpl_ = kernel::actor::simcall_answered([this] {
200 kernel::activity::CommImplPtr res(new kernel::activity::CommImpl(this->from_, this->to_, this->get_remaining()));
205 } else if (src_buff_ != nullptr) { // Sender side
207 kernel::actor::CommIsendSimcall observer{sender_,
208 mailbox_->get_impl(),
211 static_cast<unsigned char*>(src_buff_),
218 pimpl_ = kernel::actor::simcall_answered([&observer] { return kernel::activity::CommImpl::isend(&observer); },
220 } else if (dst_buff_ != nullptr) { // Receiver side
221 xbt_assert(not detached_, "Receive cannot be detached");
223 kernel::actor::CommIrecvSimcall observer{receiver_,
224 mailbox_->get_impl(),
225 static_cast<unsigned char*>(dst_buff_),
231 pimpl_ = kernel::actor::simcall_answered([&observer] { return kernel::activity::CommImpl::irecv(&observer); },
234 xbt_die("Cannot start a communication before specifying whether we are the sender or the receiver");
241 pimpl_->set_iface(this);
242 pimpl_->set_actor(sender_);
245 state_ = State::STARTED;
251 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication is %s (not implemented)",
252 __FUNCTION__, get_state_str());
253 xbt_assert(dst_buff_ == nullptr && dst_buff_size_ == 0, "You can only detach sends, not recvs");
259 ssize_t Comm::test_any(const std::vector<CommPtr>& comms)
261 std::vector<ActivityPtr> activities;
262 for (const auto& comm : comms)
263 activities.push_back(boost::dynamic_pointer_cast<Activity>(comm));
264 return Activity::test_any(activities);
267 /** @brief Block the calling actor until the communication is finished, or until timeout
269 * On timeout, an exception is thrown and the communication is invalidated.
271 * @param timeout the amount of seconds to wait for the comm termination.
272 * Negative values denote infinite wait times. 0 as a timeout returns immediately. */
273 Comm* Comm::wait_for(double timeout)
275 XBT_DEBUG("Calling Comm::wait_for with state %s", get_state_str());
276 kernel::actor::ActorImpl* issuer = nullptr;
278 case State::FINISHED:
281 throw NetworkFailureException(XBT_THROW_POINT, "Cannot wait for a failed communication");
283 case State::STARTING: // It's not started yet. Do it in one simcall if it's a regular communication
284 if (from_ != nullptr || to_ != nullptr) {
285 return vetoable_start()->wait_for(timeout); // In the case of host2host comm, do it in two simcalls
286 } else if (src_buff_ != nullptr) {
288 simcall_comm_send(sender_, mailbox_->get_impl(), remains_, rate_, src_buff_, src_buff_size_, match_fun_,
289 copy_data_function_, get_data<void>(), timeout);
293 simcall_comm_recv(receiver_, mailbox_->get_impl(), dst_buff_, &dst_buff_size_, match_fun_, copy_data_function_,
294 get_data<void>(), timeout, rate_);
299 issuer = kernel::actor::ActorImpl::self();
300 kernel::actor::ActivityWaitSimcall observer{issuer, pimpl_.get(), timeout};
301 if (kernel::actor::simcall_blocking(
302 [&observer] { observer.get_activity()->wait_for(observer.get_issuer(), observer.get_timeout()); },
304 throw TimeoutException(XBT_THROW_POINT, "Timeouted");
306 } catch (const NetworkFailureException& e) {
307 issuer->simcall_.observer_ = nullptr; // Comm failed on network failure, reset the observer to nullptr
308 complete(State::FAILED);
309 e.rethrow_nested(XBT_THROW_POINT, boost::core::demangle(typeid(e).name()) + " raised in kernel mode.");
313 case State::CANCELED:
314 throw CancelException(XBT_THROW_POINT, "Communication canceled");
319 complete(State::FINISHED);
322 ssize_t Comm::wait_any_for(const std::vector<CommPtr>& comms, double timeout)
324 std::vector<ActivityPtr> activities;
325 for (const auto& comm : comms)
326 activities.push_back(boost::dynamic_pointer_cast<Activity>(comm));
329 changed_pos = Activity::wait_any_for(activities, timeout);
330 } catch (const NetworkFailureException& e) {
332 for (auto c : comms) {
333 if (c->pimpl_->get_state() == kernel::activity::State::FAILED) {
334 c->complete(State::FAILED);
337 e.rethrow_nested(XBT_THROW_POINT, boost::core::demangle(typeid(e).name()) + " raised in kernel mode.");
342 void Comm::wait_all(const std::vector<CommPtr>& comms)
344 // TODO: this should be a simcall or something
345 for (auto& comm : comms)
349 size_t Comm::wait_all_for(const std::vector<CommPtr>& comms, double timeout)
356 double deadline = Engine::get_clock() + timeout;
357 std::vector<CommPtr> waited_comm(1, nullptr);
358 for (size_t i = 0; i < comms.size(); i++) {
359 double wait_timeout = std::max(0.0, deadline - Engine::get_clock());
360 waited_comm[0] = comms[i];
361 // Using wait_any_for() here (and not wait_for) because we don't want comms to be invalidated on timeout
362 if (wait_any_for(waited_comm, wait_timeout) == -1) {
363 XBT_DEBUG("Timeout (%g): i = %zu", wait_timeout, i);
370 } // namespace simgrid
371 /* **************************** Public C interface *************************** */
372 void sg_comm_detach(sg_comm_t comm, void (*clean_function)(void*))
374 comm->detach(clean_function);
377 void sg_comm_unref(sg_comm_t comm)
381 int sg_comm_test(sg_comm_t comm)
383 bool finished = comm->test();
389 sg_error_t sg_comm_wait(sg_comm_t comm)
391 return sg_comm_wait_for(comm, -1);
394 sg_error_t sg_comm_wait_for(sg_comm_t comm, double timeout)
396 sg_error_t status = SG_OK;
398 simgrid::s4u::CommPtr s4u_comm(comm, false);
400 s4u_comm->wait_for(timeout);
401 } catch (const simgrid::TimeoutException&) {
402 status = SG_ERROR_TIMEOUT;
403 } catch (const simgrid::CancelException&) {
404 status = SG_ERROR_CANCELED;
405 } catch (const simgrid::NetworkFailureException&) {
406 status = SG_ERROR_NETWORK;
411 void sg_comm_wait_all(sg_comm_t* comms, size_t count)
413 sg_comm_wait_all_for(comms, count, -1);
416 size_t sg_comm_wait_all_for(sg_comm_t* comms, size_t count, double timeout)
418 std::vector<simgrid::s4u::CommPtr> s4u_comms;
419 for (size_t i = 0; i < count; i++)
420 s4u_comms.emplace_back(comms[i], false);
422 size_t pos = simgrid::s4u::Comm::wait_all_for(s4u_comms, timeout);
423 for (size_t i = pos; i < count; i++)
424 s4u_comms[i]->add_ref();
428 ssize_t sg_comm_wait_any(sg_comm_t* comms, size_t count)
430 return sg_comm_wait_any_for(comms, count, -1);
433 ssize_t sg_comm_wait_any_for(sg_comm_t* comms, size_t count, double timeout)
435 std::vector<simgrid::s4u::CommPtr> s4u_comms;
436 for (size_t i = 0; i < count; i++)
437 s4u_comms.emplace_back(comms[i], false);
439 ssize_t pos = simgrid::s4u::Comm::wait_any_for(s4u_comms, timeout);
440 for (size_t i = 0; i < count; i++) {
441 if (pos != -1 && static_cast<size_t>(pos) != i)
442 s4u_comms[i]->add_ref();