1 /* Copyright (c) 2006-2021. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 //#include "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"
18 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_comm, s4u_activity, "S4U asynchronous communications");
22 xbt::signal<void(Comm const&, bool is_sender)> Comm::on_start;
23 xbt::signal<void(Comm const&)> Comm::on_completion;
25 void Comm::complete(Activity::State state)
27 Activity::complete(state);
33 if (state_ == State::STARTED && not detached_ &&
34 (pimpl_ == nullptr || pimpl_->state_ == kernel::activity::State::RUNNING)) {
35 XBT_INFO("Comm %p freed before its completion. Did you forget to detach it? (state: %s)", this, get_state_str());
36 if (pimpl_ != nullptr)
37 XBT_INFO("pimpl_->state: %s", pimpl_->get_state_str());
39 XBT_INFO("pimpl_ is null");
40 xbt_backtrace_display_current();
44 ssize_t Comm::wait_any_for(const std::vector<CommPtr>& comms, double timeout)
46 std::vector<kernel::activity::CommImpl*> rcomms(comms.size());
47 std::transform(begin(comms), end(comms), begin(rcomms),
48 [](const CommPtr& comm) { return static_cast<kernel::activity::CommImpl*>(comm->pimpl_.get()); });
51 changed_pos = simcall_comm_waitany(rcomms.data(), rcomms.size(), timeout);
52 } catch (const NetworkFailureException& e) {
53 for (auto c : comms) {
54 if (c->pimpl_->state_ == kernel::activity::State::FAILED) {
55 c->complete(State::FAILED);
58 e.rethrow_nested(XBT_THROW_POINT, boost::core::demangle(typeid(e).name()) + " raised in kernel mode.");
60 if (changed_pos != -1)
61 comms.at(changed_pos)->complete(State::FINISHED);
65 void Comm::wait_all(const std::vector<CommPtr>& comms)
67 // TODO: this should be a simcall or something
68 for (auto& comm : comms)
72 size_t Comm::wait_all_for(const std::vector<CommPtr>& comms, double timeout)
79 double deadline = Engine::get_clock() + timeout;
80 std::vector<CommPtr> waited_comm(1, nullptr);
81 for (size_t i = 0; i < comms.size(); i++) {
82 double wait_timeout = std::max(0.0, deadline - Engine::get_clock());
83 waited_comm[0] = comms[i];
84 // Using wait_any_for() here (and not wait_for) because we don't want comms to be invalidated on timeout
85 if (wait_any_for(waited_comm, wait_timeout) == -1) {
86 XBT_DEBUG("Timeout (%g): i = %zu", wait_timeout, i);
93 CommPtr Comm::set_rate(double rate)
95 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
101 CommPtr Comm::set_src_data(void* buff)
103 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
105 xbt_assert(dst_buff_ == nullptr, "Cannot set the src and dst buffers at the same time");
110 CommPtr Comm::set_src_data_size(size_t size)
112 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
114 src_buff_size_ = size;
118 CommPtr Comm::set_src_data(void* buff, size_t size)
120 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
123 xbt_assert(dst_buff_ == nullptr, "Cannot set the src and dst buffers at the same time");
125 src_buff_size_ = size;
129 CommPtr Comm::set_dst_data(void** buff)
131 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
133 xbt_assert(src_buff_ == nullptr, "Cannot set the src and dst buffers at the same time");
137 void* Comm::get_dst_data()
142 size_t Comm::get_dst_data_size() const
144 return dst_buff_size_;
146 CommPtr Comm::set_dst_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(src_buff_ == nullptr, "Cannot set the src and dst buffers at the same time");
153 dst_buff_size_ = size;
156 CommPtr Comm::set_payload_size(uint64_t bytes)
158 Activity::set_remaining(bytes);
162 CommPtr Comm::sendto_init(Host* from, Host* to)
164 CommPtr res(new Comm());
171 CommPtr Comm::sendto_async(Host* from, Host* to, uint64_t simulated_size_in_bytes)
173 auto res = Comm::sendto_init(from, to)->set_payload_size(simulated_size_in_bytes);
174 res->vetoable_start();
178 void Comm::sendto(Host* from, Host* to, uint64_t simulated_size_in_bytes)
180 sendto_async(from, to, simulated_size_in_bytes)->wait();
185 xbt_assert(get_state() == State::INITED || get_state() == State::STARTING,
186 "You cannot use %s() once your communication started (not implemented)", __FUNCTION__);
187 if (from_ != nullptr || to_ != nullptr) {
188 xbt_assert(from_ != nullptr && to_ != nullptr, "When either from_ or to_ is specified, both must be.");
189 xbt_assert(src_buff_ == nullptr && dst_buff_ == nullptr,
190 "Direct host-to-host communications cannot carry any data.");
191 pimpl_ = kernel::actor::simcall([this] {
192 kernel::activity::CommImplPtr res(new kernel::activity::CommImpl(this->from_, this->to_, this->get_remaining()));
197 } else if (src_buff_ != nullptr) { // Sender side
198 on_start(*this, true /* is_sender*/);
199 pimpl_ = simcall_comm_isend(sender_, mailbox_->get_impl(), remains_, rate_, src_buff_, src_buff_size_, match_fun_,
200 clean_fun_, copy_data_function_, get_user_data(), detached_);
201 } else if (dst_buff_ != nullptr) { // Receiver side
202 xbt_assert(not detached_, "Receive cannot be detached");
203 on_start(*this, false /*is_sender*/);
204 pimpl_ = simcall_comm_irecv(receiver_, mailbox_->get_impl(), dst_buff_, &dst_buff_size_, match_fun_,
205 copy_data_function_, get_user_data(), rate_);
208 xbt_die("Cannot start a communication before specifying whether we are the sender or the receiver");
214 state_ = State::STARTED;
218 /** @brief Block the calling actor until the communication is finished, or until timeout
220 * On timeout, an exception is thrown and the communication is invalidated.
222 * @param timeout the amount of seconds to wait for the comm termination.
223 * Negative values denote infinite wait times. 0 as a timeout returns immediately. */
224 Comm* Comm::wait_for(double timeout)
227 case State::FINISHED:
230 throw NetworkFailureException(XBT_THROW_POINT, "Cannot wait for a failed communication");
233 case State::STARTING: // It's not started yet. Do it in one simcall if it's a regular communication
234 if (from_ != nullptr || to_ != nullptr) {
235 return vetoable_start()->wait_for(timeout); // In the case of host2host comm, do it in two simcalls
236 } else if (src_buff_ != nullptr) {
237 on_start(*this, true /*is_sender*/);
238 simcall_comm_send(sender_, mailbox_->get_impl(), remains_, rate_, src_buff_, src_buff_size_, match_fun_,
239 copy_data_function_, get_user_data(), timeout);
242 on_start(*this, false /*is_sender*/);
243 simcall_comm_recv(receiver_, mailbox_->get_impl(), dst_buff_, &dst_buff_size_, match_fun_, copy_data_function_,
244 get_user_data(), timeout, rate_);
250 simcall_comm_wait(get_impl(), timeout);
251 } catch (const NetworkFailureException& e) {
252 complete(State::FAILED);
253 e.rethrow_nested(XBT_THROW_POINT, boost::core::demangle(typeid(e).name()) + " raised in kernel mode.");
257 case State::CANCELED:
258 throw CancelException(XBT_THROW_POINT, "Communication canceled");
263 complete(State::FINISHED);
267 ssize_t Comm::test_any(const std::vector<CommPtr>& comms)
269 std::vector<kernel::activity::CommImpl*> rcomms(comms.size());
270 std::transform(begin(comms), end(comms), begin(rcomms),
271 [](const CommPtr& comm) { return static_cast<kernel::activity::CommImpl*>(comm->pimpl_.get()); });
272 ssize_t changed_pos = simcall_comm_testany(rcomms.data(), rcomms.size());
273 if (changed_pos != -1)
274 comms.at(changed_pos)->complete(State::FINISHED);
280 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication is %s (not implemented)",
281 __FUNCTION__, get_state_str());
282 xbt_assert(dst_buff_ == nullptr && dst_buff_size_ == 0, "You can only detach sends, not recvs");
288 bool Comm::test() // TODO: merge with Activity::test, once modernized
290 xbt_assert(state_ == State::INITED || state_ == State::STARTED || state_ == State::STARTING ||
291 state_ == State::CANCELED || state_ == State::FINISHED);
293 if (state_ == State::CANCELED || state_ == State::FINISHED)
296 if (state_ == State::INITED || state_ == State::STARTING)
297 this->vetoable_start();
299 if (simcall_comm_test(get_impl())) {
300 complete(State::FINISHED);
306 Mailbox* Comm::get_mailbox() const
311 Actor* Comm::get_sender() const
313 kernel::actor::ActorImplPtr sender = nullptr;
315 sender = boost::static_pointer_cast<kernel::activity::CommImpl>(pimpl_)->src_actor_;
316 return sender ? sender->get_ciface() : nullptr;
319 CommPtr Comm::set_copy_data_callback(void (*callback)(kernel::activity::CommImpl*, void*, size_t))
321 copy_data_function_ = callback;
324 void Comm::copy_buffer_callback(kernel::activity::CommImpl* comm, void* buff, size_t buff_size)
326 XBT_DEBUG("Copy the data over");
327 memcpy(comm->dst_buff_, buff, buff_size);
328 if (comm->detached()) { // if this is a detached send, the source buffer was duplicated by SMPI sender to make the
329 // original buffer available to the application ASAP
331 comm->src_buff_ = nullptr;
335 void Comm::copy_pointer_callback(kernel::activity::CommImpl* comm, void* buff, size_t buff_size)
337 xbt_assert((buff_size == sizeof(void*)), "Cannot copy %zu bytes: must be sizeof(void*)", buff_size);
338 *(void**)(comm->dst_buff_) = buff;
342 } // namespace simgrid
343 /* **************************** Public C interface *************************** */
344 void sg_comm_detach(sg_comm_t comm, void (*clean_function)(void*))
346 comm->detach(clean_function);
349 void sg_comm_unref(sg_comm_t comm)
353 int sg_comm_test(sg_comm_t comm)
355 bool finished = comm->test();
361 sg_error_t sg_comm_wait(sg_comm_t comm)
363 return sg_comm_wait_for(comm, -1);
366 sg_error_t sg_comm_wait_for(sg_comm_t comm, double timeout)
368 sg_error_t status = SG_OK;
370 simgrid::s4u::CommPtr s4u_comm(comm, false);
372 s4u_comm->wait_for(timeout);
373 } catch (const simgrid::TimeoutException&) {
374 status = SG_ERROR_TIMEOUT;
375 } catch (const simgrid::CancelException&) {
376 status = SG_ERROR_CANCELED;
377 } catch (const simgrid::NetworkFailureException&) {
378 status = SG_ERROR_NETWORK;
383 void sg_comm_wait_all(sg_comm_t* comms, size_t count)
385 sg_comm_wait_all_for(comms, count, -1);
388 size_t sg_comm_wait_all_for(sg_comm_t* comms, size_t count, double timeout)
390 std::vector<simgrid::s4u::CommPtr> s4u_comms;
391 for (size_t i = 0; i < count; i++)
392 s4u_comms.emplace_back(comms[i], false);
394 size_t pos = simgrid::s4u::Comm::wait_all_for(s4u_comms, timeout);
395 for (size_t i = pos; i < count; i++)
396 s4u_comms[i]->add_ref();
400 ssize_t sg_comm_wait_any(sg_comm_t* comms, size_t count)
402 return sg_comm_wait_any_for(comms, count, -1);
405 ssize_t sg_comm_wait_any_for(sg_comm_t* comms, size_t count, double timeout)
407 std::vector<simgrid::s4u::CommPtr> s4u_comms;
408 for (size_t i = 0; i < count; i++)
409 s4u_comms.emplace_back(comms[i], false);
411 ssize_t pos = simgrid::s4u::Comm::wait_any_for(s4u_comms, timeout);
412 for (size_t i = 0; i < count; i++) {
413 if (pos != -1 && static_cast<size_t>(pos) != i)
414 s4u_comms[i]->add_ref();