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/s4u/Comm.hpp"
11 #include "simgrid/s4u/Engine.hpp"
12 #include "simgrid/s4u/Mailbox.hpp"
14 #include <simgrid/comm.h>
16 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_comm, s4u_activity, "S4U asynchronous communications");
20 xbt::signal<void(Comm const&, bool is_sender)> Comm::on_start;
21 xbt::signal<void(Comm const&)> Comm::on_completion;
23 void Comm::complete(Activity::State state)
25 Activity::complete(state);
31 if (state_ == State::STARTED && not detached_ &&
32 (pimpl_ == nullptr || pimpl_->state_ == kernel::activity::State::RUNNING)) {
33 XBT_INFO("Comm %p freed before its completion. Did you forget to detach it? (state: %s)", this, get_state_str());
34 if (pimpl_ != nullptr)
35 XBT_INFO("pimpl_->state: %s", pimpl_->get_state_str());
37 XBT_INFO("pimpl_ is null");
38 xbt_backtrace_display_current();
42 ssize_t Comm::wait_any_for(const std::vector<CommPtr>& comms, double timeout)
44 std::vector<kernel::activity::CommImpl*> rcomms(comms.size());
45 std::transform(begin(comms), end(comms), begin(rcomms),
46 [](const CommPtr& comm) { return static_cast<kernel::activity::CommImpl*>(comm->pimpl_.get()); });
47 ssize_t changed_pos = -1;
49 changed_pos = simcall_comm_waitany(rcomms.data(), rcomms.size(), timeout);
50 } catch (const NetworkFailureException& e) {
51 for (auto c : comms) {
52 if (c->pimpl_->state_ == kernel::activity::State::FAILED) {
53 c->complete(State::FAILED);
56 e.rethrow_nested(XBT_THROW_POINT, boost::core::demangle(typeid(e).name()) + " raised in kernel mode.");
58 if (changed_pos != -1)
59 comms.at(changed_pos)->complete(State::FINISHED);
63 void Comm::wait_all(const std::vector<CommPtr>& comms)
65 // TODO: this should be a simcall or something
66 for (auto& comm : comms)
70 size_t Comm::wait_all_for(const std::vector<CommPtr>& comms, double timeout)
77 double deadline = Engine::get_clock() + timeout;
78 std::vector<CommPtr> waited_comm(1, nullptr);
79 for (size_t i = 0; i < comms.size(); i++) {
80 double wait_timeout = std::max(0.0, deadline - Engine::get_clock());
81 waited_comm[0] = comms[i];
82 // Using wait_any_for() here (and not wait_for) because we don't want comms to be invalidated on timeout
83 if (wait_any_for(waited_comm, wait_timeout) == -1) {
84 XBT_DEBUG("Timeout (%g): i = %zu", wait_timeout, i);
91 CommPtr Comm::set_rate(double rate)
93 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
99 CommPtr Comm::set_src_data(void* buff)
101 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
103 xbt_assert(dst_buff_ == nullptr, "Cannot set the src and dst buffers at the same time");
108 CommPtr Comm::set_src_data_size(size_t size)
110 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
112 src_buff_size_ = size;
116 CommPtr Comm::set_src_data(void* buff, size_t size)
118 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
121 xbt_assert(dst_buff_ == nullptr, "Cannot set the src and dst buffers at the same time");
123 src_buff_size_ = size;
127 CommPtr Comm::set_dst_data(void** buff)
129 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
131 xbt_assert(src_buff_ == nullptr, "Cannot set the src and dst buffers at the same time");
135 void* Comm::get_dst_data()
140 size_t Comm::get_dst_data_size() const
142 return dst_buff_size_;
144 CommPtr Comm::set_dst_data(void** buff, size_t size)
146 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication started (not implemented)",
149 xbt_assert(src_buff_ == nullptr, "Cannot set the src and dst buffers at the same time");
151 dst_buff_size_ = size;
154 CommPtr Comm::set_payload_size(uint64_t bytes)
156 Activity::set_remaining(bytes);
160 CommPtr Comm::sendto_init(Host* from, Host* to)
162 CommPtr res(new Comm());
169 CommPtr Comm::sendto_async(Host* from, Host* to, uint64_t simulated_size_in_bytes)
171 auto res = Comm::sendto_init(from, to)->set_payload_size(simulated_size_in_bytes);
172 res->vetoable_start();
176 void Comm::sendto(Host* from, Host* to, uint64_t simulated_size_in_bytes)
178 sendto_async(from, to, simulated_size_in_bytes)->wait();
183 xbt_assert(get_state() == State::INITED || get_state() == State::STARTING,
184 "You cannot use %s() once your communication started (not implemented)", __FUNCTION__);
185 if (from_ != nullptr || to_ != nullptr) {
186 xbt_assert(from_ != nullptr && to_ != nullptr, "When either from_ or to_ is specified, both must be.");
187 xbt_assert(src_buff_ == nullptr && dst_buff_ == nullptr,
188 "Direct host-to-host communications cannot carry any data.");
189 pimpl_ = kernel::actor::simcall([this] {
190 kernel::activity::CommImplPtr res(new kernel::activity::CommImpl(this->from_, this->to_, this->get_remaining()));
195 } else if (src_buff_ != nullptr) { // Sender side
196 on_start(*this, true /* is_sender*/);
197 pimpl_ = simcall_comm_isend(sender_, mailbox_->get_impl(), remains_, rate_, src_buff_, src_buff_size_, match_fun_,
198 clean_fun_, copy_data_function_, get_user_data(), detached_);
199 } else if (dst_buff_ != nullptr) { // Receiver side
200 xbt_assert(not detached_, "Receive cannot be detached");
201 on_start(*this, false /*is_sender*/);
202 pimpl_ = simcall_comm_irecv(receiver_, mailbox_->get_impl(), dst_buff_, &dst_buff_size_, match_fun_,
203 copy_data_function_, get_user_data(), rate_);
206 xbt_die("Cannot start a communication before specifying whether we are the sender or the receiver");
212 state_ = State::STARTED;
216 /** @brief Block the calling actor until the communication is finished, or until timeout
218 * On timeout, an exception is thrown and the communication is invalidated.
220 * @param timeout the amount of seconds to wait for the comm termination.
221 * Negative values denote infinite wait times. 0 as a timeout returns immediately. */
222 Comm* Comm::wait_for(double timeout)
225 case State::FINISHED:
228 throw NetworkFailureException(XBT_THROW_POINT, "Cannot wait for a failed communication");
231 case State::STARTING: // It's not started yet. Do it in one simcall if it's a regular communication
232 if (from_ != nullptr || to_ != nullptr) {
233 return vetoable_start()->wait_for(timeout); // In the case of host2host comm, do it in two simcalls
234 } else if (src_buff_ != nullptr) {
235 on_start(*this, true /*is_sender*/);
236 simcall_comm_send(sender_, mailbox_->get_impl(), remains_, rate_, src_buff_, src_buff_size_, match_fun_,
237 copy_data_function_, get_user_data(), timeout);
240 on_start(*this, false /*is_sender*/);
241 simcall_comm_recv(receiver_, mailbox_->get_impl(), dst_buff_, &dst_buff_size_, match_fun_, copy_data_function_,
242 get_user_data(), timeout, rate_);
248 simcall_comm_wait(get_impl(), timeout);
249 } catch (const NetworkFailureException& e) {
250 complete(State::FAILED);
251 e.rethrow_nested(XBT_THROW_POINT, boost::core::demangle(typeid(e).name()) + " raised in kernel mode.");
255 case State::CANCELED:
256 throw CancelException(XBT_THROW_POINT, "Communication canceled");
261 complete(State::FINISHED);
265 ssize_t Comm::test_any(const std::vector<CommPtr>& comms)
267 std::vector<kernel::activity::CommImpl*> rcomms(comms.size());
268 std::transform(begin(comms), end(comms), begin(rcomms),
269 [](const CommPtr& comm) { return static_cast<kernel::activity::CommImpl*>(comm->pimpl_.get()); });
270 ssize_t changed_pos = simcall_comm_testany(rcomms.data(), rcomms.size());
271 if (changed_pos != -1)
272 comms.at(changed_pos)->complete(State::FINISHED);
278 xbt_assert(state_ == State::INITED, "You cannot use %s() once your communication is %s (not implemented)",
279 __FUNCTION__, get_state_str());
280 xbt_assert(dst_buff_ == nullptr && dst_buff_size_ == 0, "You can only detach sends, not recvs");
286 bool Comm::test() // TODO: merge with Activity::test, once modernized
288 xbt_assert(state_ == State::INITED || state_ == State::STARTED || state_ == State::STARTING ||
289 state_ == State::CANCELED || state_ == State::FINISHED);
291 if (state_ == State::CANCELED || state_ == State::FINISHED)
294 if (state_ == State::INITED || state_ == State::STARTING)
295 this->vetoable_start();
297 if (simcall_comm_test(get_impl())) {
298 complete(State::FINISHED);
304 Mailbox* Comm::get_mailbox() const
309 Actor* Comm::get_sender() const
311 kernel::actor::ActorImplPtr sender = nullptr;
313 sender = boost::static_pointer_cast<kernel::activity::CommImpl>(pimpl_)->src_actor_;
314 return sender ? sender->get_ciface() : nullptr;
317 CommPtr Comm::set_copy_data_callback(void (*callback)(kernel::activity::CommImpl*, void*, size_t))
319 copy_data_function_ = callback;
324 } // namespace simgrid
325 /* **************************** Public C interface *************************** */
326 void sg_comm_detach(sg_comm_t comm, void (*clean_function)(void*))
328 comm->detach(clean_function);
331 void sg_comm_unref(sg_comm_t comm)
335 int sg_comm_test(sg_comm_t comm)
337 bool finished = comm->test();
343 sg_error_t sg_comm_wait(sg_comm_t comm)
345 return sg_comm_wait_for(comm, -1);
348 sg_error_t sg_comm_wait_for(sg_comm_t comm, double timeout)
350 sg_error_t status = SG_OK;
352 simgrid::s4u::CommPtr s4u_comm(comm, false);
354 s4u_comm->wait_for(timeout);
355 } catch (const simgrid::TimeoutException&) {
356 status = SG_ERROR_TIMEOUT;
357 } catch (const simgrid::CancelException&) {
358 status = SG_ERROR_CANCELED;
359 } catch (const simgrid::NetworkFailureException&) {
360 status = SG_ERROR_NETWORK;
365 void sg_comm_wait_all(sg_comm_t* comms, size_t count)
367 sg_comm_wait_all_for(comms, count, -1);
370 size_t sg_comm_wait_all_for(sg_comm_t* comms, size_t count, double timeout)
372 std::vector<simgrid::s4u::CommPtr> s4u_comms;
373 for (size_t i = 0; i < count; i++)
374 s4u_comms.emplace_back(comms[i], false);
376 size_t pos = simgrid::s4u::Comm::wait_all_for(s4u_comms, timeout);
377 for (size_t i = pos; i < count; i++)
378 s4u_comms[i]->add_ref();
382 ssize_t sg_comm_wait_any(sg_comm_t* comms, size_t count)
384 return sg_comm_wait_any_for(comms, count, -1);
387 ssize_t sg_comm_wait_any_for(sg_comm_t* comms, size_t count, double timeout)
389 std::vector<simgrid::s4u::CommPtr> s4u_comms;
390 for (size_t i = 0; i < count; i++)
391 s4u_comms.emplace_back(comms[i], false);
393 ssize_t pos = simgrid::s4u::Comm::wait_any_for(s4u_comms, timeout);
394 for (size_t i = 0; i < count; i++) {
395 if (pos != -1 && static_cast<size_t>(pos) != i)
396 s4u_comms[i]->add_ref();