X-Git-Url: http://bilbo.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/77bbf3027c4240a2e833209a3a3f186589da8577..b7c53df18dcbf388f0dce6d7baa3086436028313:/src/kernel/activity/CommImpl.cpp diff --git a/src/kernel/activity/CommImpl.cpp b/src/kernel/activity/CommImpl.cpp index 7f19e426da..9b57df5743 100644 --- a/src/kernel/activity/CommImpl.cpp +++ b/src/kernel/activity/CommImpl.cpp @@ -1,126 +1,698 @@ -/* Copyright (c) 2007-2017. The SimGrid Team. All rights reserved. */ +/* Copyright (c) 2007-2021. The SimGrid Team. All rights reserved. */ /* This program is free software; you can redistribute it and/or modify it * under the terms of the license (GNU LGPL) which comes with this package. */ -#include "src/kernel/activity/CommImpl.hpp" +#include +#include +#include +#include -#include "simgrid/modelchecker.h" +#include "src/kernel/activity/CommImpl.hpp" +#include "src/kernel/activity/MailboxImpl.hpp" +#include "src/kernel/context/Context.hpp" #include "src/mc/mc_replay.hpp" -#include "src/simix/smx_network_private.hpp" -#include "src/surf/surf_interface.hpp" +#include "src/surf/cpu_interface.hpp" +#include "src/surf/network_interface.hpp" + +XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_network, simix, "SIMIX network-related synchronization"); + +XBT_PRIVATE void simcall_HANDLER_comm_send(smx_simcall_t simcall, smx_actor_t src, smx_mailbox_t mbox, double task_size, + double rate, unsigned char* src_buff, size_t src_buff_size, + bool (*match_fun)(void*, void*, simgrid::kernel::activity::CommImpl*), + void (*copy_data_fun)(simgrid::kernel::activity::CommImpl*, void*, size_t), + void* data, double timeout) +{ + simgrid::kernel::activity::ActivityImplPtr comm = simcall_HANDLER_comm_isend( + simcall, src, mbox, task_size, rate, src_buff, src_buff_size, match_fun, nullptr, copy_data_fun, data, false); + simcall->mc_value_ = 0; + comm->wait_for(simcall->issuer_, timeout); +} + +XBT_PRIVATE simgrid::kernel::activity::ActivityImplPtr simcall_HANDLER_comm_isend( + smx_simcall_t /*simcall*/, smx_actor_t src_proc, smx_mailbox_t mbox, double task_size, double rate, + unsigned char* src_buff, size_t src_buff_size, + bool (*match_fun)(void*, void*, simgrid::kernel::activity::CommImpl*), + void (*clean_fun)(void*), // used to free the synchro in case of problem after a detached send + void (*copy_data_fun)(simgrid::kernel::activity::CommImpl*, void*, size_t), // used to copy data if not default one + void* data, bool detached) +{ + XBT_DEBUG("send from mailbox %p", mbox); + + /* Prepare a synchro describing us, so that it gets passed to the user-provided filter of other side */ + simgrid::kernel::activity::CommImplPtr this_comm( + new simgrid::kernel::activity::CommImpl(simgrid::kernel::activity::CommImpl::Type::SEND)); + + /* Look for communication synchro matching our needs. We also provide a description of + * ourself so that the other side also gets a chance of choosing if it wants to match with us. + * + * If it is not found then push our communication into the rendez-vous point */ + simgrid::kernel::activity::CommImplPtr other_comm = + mbox->find_matching_comm(simgrid::kernel::activity::CommImpl::Type::RECEIVE, match_fun, data, this_comm, + /*done*/ false, /*remove_matching*/ true); + + if (not other_comm) { + other_comm = std::move(this_comm); + + if (mbox->is_permanent()) { + // this mailbox is for small messages, which have to be sent right now + other_comm->state_ = simgrid::kernel::activity::State::READY; + other_comm->dst_actor_ = mbox->get_permanent_receiver().get(); + mbox->push_done(other_comm); + XBT_DEBUG("pushing a message into the permanent receive list %p, comm %p", mbox, other_comm.get()); + + } else { + mbox->push(other_comm); + } + } else { + XBT_DEBUG("Receive already pushed"); + + other_comm->state_ = simgrid::kernel::activity::State::READY; + } + + if (detached) { + other_comm->detach(); + other_comm->clean_fun = clean_fun; + } else { + other_comm->clean_fun = nullptr; + src_proc->activities_.emplace_back(other_comm); + } + + /* Setup the communication synchro */ + other_comm->src_actor_ = src_proc; + other_comm->src_data_ = data; + (*other_comm).set_src_buff(src_buff, src_buff_size).set_size(task_size).set_rate(rate); + + other_comm->match_fun = match_fun; + other_comm->copy_data_fun = copy_data_fun; + + if (MC_is_active() || MC_record_replay_is_active()) + other_comm->state_ = simgrid::kernel::activity::State::RUNNING; + else + other_comm->start(); + + return (detached ? nullptr : other_comm); +} + +XBT_PRIVATE void simcall_HANDLER_comm_recv(smx_simcall_t simcall, smx_actor_t receiver, smx_mailbox_t mbox, + unsigned char* dst_buff, size_t* dst_buff_size, + bool (*match_fun)(void*, void*, simgrid::kernel::activity::CommImpl*), + void (*copy_data_fun)(simgrid::kernel::activity::CommImpl*, void*, size_t), + void* data, double timeout, double rate) +{ + simgrid::kernel::activity::ActivityImplPtr comm = simcall_HANDLER_comm_irecv( + simcall, receiver, mbox, dst_buff, dst_buff_size, match_fun, copy_data_fun, data, rate); + simcall->mc_value_ = 0; + comm->wait_for(simcall->issuer_, timeout); +} + +XBT_PRIVATE simgrid::kernel::activity::ActivityImplPtr +simcall_HANDLER_comm_irecv(smx_simcall_t /*simcall*/, smx_actor_t receiver, smx_mailbox_t mbox, unsigned char* dst_buff, + size_t* dst_buff_size, bool (*match_fun)(void*, void*, simgrid::kernel::activity::CommImpl*), + void (*copy_data_fun)(simgrid::kernel::activity::CommImpl*, void*, size_t), void* data, + double rate) +{ + simgrid::kernel::activity::CommImplPtr this_synchro( + new simgrid::kernel::activity::CommImpl(simgrid::kernel::activity::CommImpl::Type::RECEIVE)); + XBT_DEBUG("recv from mbox %p. this_synchro=%p", mbox, this_synchro.get()); + + simgrid::kernel::activity::CommImplPtr other_comm; + // communication already done, get it inside the list of completed comms + if (mbox->is_permanent() && mbox->has_some_done_comm()) { + XBT_DEBUG("We have a comm that has probably already been received, trying to match it, to skip the communication"); + // find a match in the list of already received comms + other_comm = mbox->find_matching_comm(simgrid::kernel::activity::CommImpl::Type::SEND, match_fun, data, + this_synchro, /*done*/ true, + /*remove_matching*/ true); + // if not found, assume the receiver came first, register it to the mailbox in the classical way + if (not other_comm) { + XBT_DEBUG("We have messages in the permanent receive list, but not the one we are looking for, pushing request " + "into list"); + other_comm = std::move(this_synchro); + mbox->push(other_comm); + } else { + if (other_comm->surf_action_ && other_comm->get_remaining() < 1e-12) { + XBT_DEBUG("comm %p has been already sent, and is finished, destroy it", other_comm.get()); + other_comm->state_ = simgrid::kernel::activity::State::DONE; + other_comm->set_mailbox(nullptr); + } + } + } else { + /* Prepare a comm describing us, so that it gets passed to the user-provided filter of other side */ + + /* Look for communication activity matching our needs. We also provide a description of + * ourself so that the other side also gets a chance of choosing if it wants to match with us. + * + * If it is not found then push our communication into the rendez-vous point */ + other_comm = mbox->find_matching_comm(simgrid::kernel::activity::CommImpl::Type::SEND, match_fun, data, + this_synchro, /*done*/ false, + /*remove_matching*/ true); + + if (other_comm == nullptr) { + XBT_DEBUG("Receive pushed first (%zu comm enqueued so far)", mbox->size()); + other_comm = std::move(this_synchro); + mbox->push(other_comm); + } else { + XBT_DEBUG("Match my %p with the existing %p", this_synchro.get(), other_comm.get()); + + other_comm->state_ = simgrid::kernel::activity::State::READY; + } + receiver->activities_.emplace_back(other_comm); + } + + /* Setup communication synchro */ + other_comm->dst_actor_ = receiver; + other_comm->dst_data_ = data; + other_comm->set_dst_buff(dst_buff, dst_buff_size); + + if (rate > -1.0 && (other_comm->get_rate() < 0.0 || rate < other_comm->get_rate())) + other_comm->set_rate(rate); + + other_comm->match_fun = match_fun; + other_comm->copy_data_fun = copy_data_fun; + + if (MC_is_active() || MC_record_replay_is_active()) { + other_comm->state_ = simgrid::kernel::activity::State::RUNNING; + return other_comm; + } + other_comm->start(); + return other_comm; +} + +void simcall_HANDLER_comm_wait(smx_simcall_t simcall, simgrid::kernel::activity::CommImpl* comm, double timeout) +{ + comm->wait_for(simcall->issuer_, timeout); +} + +bool simcall_HANDLER_comm_test(smx_simcall_t, simgrid::kernel::activity::CommImpl* comm) +{ + return comm->test(); +} + +ssize_t simcall_HANDLER_comm_testany(smx_simcall_t simcall, simgrid::kernel::activity::CommImpl* comms[], size_t count) +{ + std::vector comms_vec(comms, comms + count); + return simgrid::kernel::activity::CommImpl::test_any(simcall->issuer_, comms_vec); +} + +void simcall_HANDLER_comm_waitany(smx_simcall_t simcall, simgrid::kernel::activity::CommImpl* comms[], size_t count, + double timeout) +{ + std::vector comms_vec(comms, comms + count); + simgrid::kernel::activity::CommImpl::wait_any_for(simcall->issuer_, comms_vec, timeout); +} + +/******************************************************************************/ +/* SIMIX_comm_copy_data callbacks */ +/******************************************************************************/ +// XBT_ATTRIB_DEPRECATED_v333 +void SIMIX_comm_set_copy_data_callback(void (*callback)(simgrid::kernel::activity::CommImpl*, void*, size_t)) +{ + simgrid::kernel::activity::CommImpl::set_copy_data_callback(callback); +} + +void SIMIX_comm_copy_buffer_callback(simgrid::kernel::activity::CommImpl* comm, void* buff, size_t buff_size) +{ + XBT_DEBUG("Copy the data over"); + memcpy(comm->dst_buff_, buff, buff_size); + if (comm->detached()) { // if this is a detached send, the source buffer was duplicated by SMPI sender to make the + // original buffer available to the application ASAP + xbt_free(buff); + comm->src_buff_ = nullptr; + } +} + +void SIMIX_comm_copy_pointer_callback(simgrid::kernel::activity::CommImpl* comm, void* buff, size_t buff_size) +{ + xbt_assert((buff_size == sizeof(void*)), "Cannot copy %zu bytes: must be sizeof(void*)", buff_size); + *(void**)(comm->dst_buff_) = buff; +} + +namespace simgrid { +namespace kernel { +namespace activity { + +void (*CommImpl::copy_data_callback_)(CommImpl*, void*, size_t) = &SIMIX_comm_copy_pointer_callback; + +void CommImpl::set_copy_data_callback(void (*callback)(CommImpl*, void*, size_t)) +{ + copy_data_callback_ = callback; +} + +CommImpl& CommImpl::set_size(double size) +{ + size_ = size; + return *this; +} + +CommImpl& CommImpl::set_rate(double rate) +{ + rate_ = rate; + return *this; +} +CommImpl& CommImpl::set_mailbox(MailboxImpl* mbox) +{ + mbox_ = mbox; + return *this; +} + +CommImpl& CommImpl::set_src_buff(unsigned char* buff, size_t size) +{ + src_buff_ = buff; + src_buff_size_ = size; + return *this; +} + +CommImpl& CommImpl::set_dst_buff(unsigned char* buff, size_t* size) +{ + dst_buff_ = buff; + dst_buff_size_ = size; + return *this; +} -XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_network); +CommImpl& CommImpl::detach() +{ + detached_ = true; + return *this; +} -simgrid::kernel::activity::CommImpl::CommImpl(e_smx_comm_type_t _type) : type(_type) +CommImpl::CommImpl(s4u::Host* from, s4u::Host* to, double bytes) : size_(bytes), detached_(true), from_(from), to_(to) { - state = SIMIX_WAITING; - src_data = nullptr; - dst_data = nullptr; - XBT_DEBUG("Create comm activity %p", this); + state_ = State::READY; } -simgrid::kernel::activity::CommImpl::~CommImpl() +CommImpl::~CommImpl() { - XBT_DEBUG("Really free communication %p", this); + XBT_DEBUG("Really free communication %p in state %s (detached = %d)", this, get_state_str(), detached_); - cleanupSurf(); + cleanup_surf(); - if (detached && state != SIMIX_DONE) { + if (detached_ && state_ != State::DONE) { /* the communication has failed and was detached: * we have to free the buffer */ if (clean_fun) - clean_fun(src_buff); - src_buff = nullptr; + clean_fun(src_buff_); + src_buff_ = nullptr; + } else if (mbox_) { + mbox_->remove(this); } +} + +/** @brief Starts the simulation of a communication synchro. */ +CommImpl* CommImpl::start() +{ + /* If both the sender and the receiver are already there, start the communication */ + if (state_ == State::READY) { + from_ = from_ != nullptr ? from_ : src_actor_->get_host(); + to_ = to_ != nullptr ? to_ : dst_actor_->get_host(); - if (mbox) - mbox->remove(this); + /* Getting the network_model from the origin host + * Valid while we have a single network model, otherwise we would need to change this function to first get the + * routes and later create the respective surf actions */ + auto net_model = from_->get_netpoint()->get_englobing_zone()->get_network_model(); + + surf_action_ = net_model->communicate(from_, to_, size_, rate_); + surf_action_->set_activity(this); + surf_action_->set_category(get_tracing_category()); + state_ = State::RUNNING; + + XBT_DEBUG("Starting communication %p from '%s' to '%s' (surf_action: %p; state: %s)", this, from_->get_cname(), + to_->get_cname(), surf_action_, get_state_str()); + + /* If a link is failed, detect it immediately */ + if (surf_action_->get_state() == resource::Action::State::FAILED) { + XBT_DEBUG("Communication from '%s' to '%s' failed to start because of a link failure", from_->get_cname(), + to_->get_cname()); + state_ = State::LINK_FAILURE; + post(); + + } else if ((src_actor_ != nullptr && src_actor_->is_suspended()) || + (dst_actor_ != nullptr && dst_actor_->is_suspended())) { + /* If any of the actor is suspended, create the synchro but stop its execution, + it will be restarted when the sender actor resume */ + if (src_actor_->is_suspended()) + XBT_DEBUG("The communication is suspended on startup because src (%s@%s) was suspended since it initiated the " + "communication", + src_actor_->get_cname(), src_actor_->get_host()->get_cname()); + else + XBT_DEBUG("The communication is suspended on startup because dst (%s@%s) was suspended since it initiated the " + "communication", + dst_actor_->get_cname(), dst_actor_->get_host()->get_cname()); + + surf_action_->suspend(); + } + } + + return this; } -void simgrid::kernel::activity::CommImpl::suspend() +/** @brief Copy the communication data from the sender's buffer to the receiver's one */ +void CommImpl::copy_data() { - /* FIXME: shall we suspend also the timeout synchro? */ - if (surf_comm) - surf_comm->suspend(); - /* in the other case, the action will be suspended on creation, in SIMIX_comm_start() */ + size_t buff_size = src_buff_size_; + /* If there is no data to copy then return */ + if (not src_buff_ || not dst_buff_ || copied_) + return; + + XBT_DEBUG("Copying comm %p data from %s (%p) -> %s (%p) (%zu bytes)", this, + src_actor_ ? src_actor_->get_host()->get_cname() : "a finished actor", src_buff_, + dst_actor_ ? dst_actor_->get_host()->get_cname() : "a finished actor", dst_buff_, buff_size); + + /* Copy at most dst_buff_size bytes of the message to receiver's buffer */ + if (dst_buff_size_) { + buff_size = std::min(buff_size, *dst_buff_size_); + + /* Update the receiver's buffer size to the copied amount */ + *dst_buff_size_ = buff_size; + } + + if (buff_size > 0) { + if (copy_data_fun) + copy_data_fun(this, src_buff_, buff_size); + else + copy_data_callback_(this, src_buff_, buff_size); + } + + /* Set the copied flag so we copy data only once */ + /* (this function might be called from both communication ends) */ + copied_ = true; } -void simgrid::kernel::activity::CommImpl::resume() +bool CommImpl::test() { - /*FIXME: check what happen with the timeouts */ - if (surf_comm) - surf_comm->resume(); - /* in the other case, the synchro were not really suspended yet, see SIMIX_comm_suspend() and SIMIX_comm_start() */ + if ((MC_is_active() || MC_record_replay_is_active()) && src_actor_ && dst_actor_) + state_ = State::DONE; + return ActivityImpl::test(); } -void simgrid::kernel::activity::CommImpl::cancel() +void CommImpl::wait_for(actor::ActorImpl* issuer, double timeout) { - /* if the synchro is a waiting state means that it is still in a mbox */ - /* so remove from it and delete it */ - if (state == SIMIX_WAITING) { - mbox->remove(this); - state = SIMIX_CANCELED; - } else if (not MC_is_active() /* when running the MC there are no surf actions */ - && not MC_record_replay_is_active() && (state == SIMIX_READY || state == SIMIX_RUNNING)) { + XBT_DEBUG("CommImpl::wait_for(%g), %p, state %s", timeout, this, to_c_str(state_)); + + /* Associate this simcall to the wait synchro */ + register_simcall(&issuer->simcall_); - surf_comm->cancel(); + if (MC_is_active() || MC_record_replay_is_active()) { + int idx = issuer->simcall_.mc_value_; + if (idx == 0) { + state_ = State::DONE; + } else { + /* If we reached this point, the wait simcall must have a timeout */ + /* Otherwise it shouldn't be enabled and executed by the MC */ + if (timeout < 0.0) + THROW_IMPOSSIBLE; + state_ = (issuer == src_actor_ ? State::SRC_TIMEOUT : State::DST_TIMEOUT); + } + finish(); + return; + } + + /* If the synchro has already finish perform the error handling, */ + /* otherwise set up a waiting timeout on the right side */ + if (state_ != State::WAITING && state_ != State::RUNNING) { + finish(); + } else { /* we need a sleep action (even when there is no timeout) to be notified of host failures */ + resource::Action* sleep = issuer->get_host()->get_cpu()->sleep(timeout); + sleep->set_activity(this); + + if (issuer == src_actor_) + src_timeout_ = sleep; + else + dst_timeout_ = sleep; } } -/** @brief get the amount remaining from the communication */ -double simgrid::kernel::activity::CommImpl::remains() +ssize_t CommImpl::test_any(const actor::ActorImpl* issuer, const std::vector& comms) { - if (state == SIMIX_RUNNING) - return surf_comm->getRemains(); + if (MC_is_active() || MC_record_replay_is_active()) { + int idx = issuer->simcall_.mc_value_; + xbt_assert(idx == -1 || comms[idx]->test()); + return idx; + } - /* FIXME: check what should be returned in the other cases */ - return 0; + for (std::size_t i = 0; i < comms.size(); ++i) { + if (comms[i]->test()) + return i; + } + return -1; } -/** @brief This is part of the cleanup process, probably an internal command */ -void simgrid::kernel::activity::CommImpl::cleanupSurf() +void CommImpl::wait_any_for(actor::ActorImpl* issuer, const std::vector& comms, double timeout) +{ + if (MC_is_active() || MC_record_replay_is_active()) { + xbt_assert(timeout <= 0.0, "Timeout not implemented for waitany in the model-checker"); + int idx = issuer->simcall_.mc_value_; + auto* comm = comms[idx]; + comm->simcalls_.push_back(&issuer->simcall_); + simcall_comm_waitany__set__result(&issuer->simcall_, idx); + comm->state_ = State::DONE; + comm->finish(); + return; + } + + if (timeout < 0.0) { + issuer->simcall_.timeout_cb_ = nullptr; + } else { + issuer->simcall_.timeout_cb_ = timer::Timer::set(s4u::Engine::get_clock() + timeout, [issuer, comms]() { + // FIXME: Vector `comms' is copied here. Use a reference once its lifetime is extended (i.e. when the simcall is + // modernized). + issuer->simcall_.timeout_cb_ = nullptr; + for (auto* comm : comms) + comm->unregister_simcall(&issuer->simcall_); + simcall_comm_waitany__set__result(&issuer->simcall_, -1); + issuer->simcall_answer(); + }); + } + + for (auto* comm : comms) { + /* associate this simcall to the the synchro */ + comm->simcalls_.push_back(&issuer->simcall_); + + /* see if the synchro is already finished */ + if (comm->state_ != State::WAITING && comm->state_ != State::RUNNING) { + comm->finish(); + break; + } + } +} + +void CommImpl::suspend() +{ + /* FIXME: shall we suspend also the timeout synchro? */ + if (surf_action_) + surf_action_->suspend(); + /* if not created yet, the action will be suspended on creation, in CommImpl::start() */ +} + +void CommImpl::resume() { - if (surf_comm) { - surf_comm->unref(); - surf_comm = nullptr; + /*FIXME: check what happen with the timeouts */ + if (surf_action_) + surf_action_->resume(); + /* in the other case, the synchro were not really suspended yet, see CommImpl::suspend() and CommImpl::start() */ +} + +void CommImpl::cancel() +{ + /* if the synchro is a waiting state means that it is still in a mbox so remove from it and delete it */ + if (state_ == State::WAITING) { + if (not detached_) { + mbox_->remove(this); + state_ = State::CANCELED; + } + } else if (not MC_is_active() /* when running the MC there are no surf actions */ + && not MC_record_replay_is_active() && (state_ == State::READY || state_ == State::RUNNING)) { + surf_action_->cancel(); } +} + +/** @brief This is part of the cleanup process, probably an internal command */ +void CommImpl::cleanup_surf() +{ + clean_action(); - if (src_timeout) { - src_timeout->unref(); - src_timeout = nullptr; + if (src_timeout_) { + src_timeout_->unref(); + src_timeout_ = nullptr; } - if (dst_timeout) { - dst_timeout->unref(); - dst_timeout = nullptr; + if (dst_timeout_) { + dst_timeout_->unref(); + dst_timeout_ = nullptr; } } -void simgrid::kernel::activity::CommImpl::post() +void CommImpl::post() { /* Update synchro state */ - if (src_timeout && src_timeout->getState() == simgrid::surf::Action::State::done) - state = SIMIX_SRC_TIMEOUT; - else if (dst_timeout && dst_timeout->getState() == simgrid::surf::Action::State::done) - state = SIMIX_DST_TIMEOUT; - else if (src_timeout && src_timeout->getState() == simgrid::surf::Action::State::failed) - state = SIMIX_SRC_HOST_FAILURE; - else if (dst_timeout && dst_timeout->getState() == simgrid::surf::Action::State::failed) - state = SIMIX_DST_HOST_FAILURE; - else if (surf_comm && surf_comm->getState() == simgrid::surf::Action::State::failed) { - state = SIMIX_LINK_FAILURE; + if (src_timeout_ && src_timeout_->get_state() == resource::Action::State::FINISHED) + state_ = State::SRC_TIMEOUT; + else if (dst_timeout_ && dst_timeout_->get_state() == resource::Action::State::FINISHED) + state_ = State::DST_TIMEOUT; + else if (src_timeout_ && src_timeout_->get_state() == resource::Action::State::FAILED) + state_ = State::SRC_HOST_FAILURE; + else if (dst_timeout_ && dst_timeout_->get_state() == resource::Action::State::FAILED) + state_ = State::DST_HOST_FAILURE; + else if (surf_action_ && surf_action_->get_state() == resource::Action::State::FAILED) { + state_ = State::LINK_FAILURE; } else - state = SIMIX_DONE; + state_ = State::DONE; - XBT_DEBUG("SIMIX_post_comm: comm %p, state %d, src_proc %p, dst_proc %p, detached: %d", this, (int)state, src_proc, - dst_proc, detached); + XBT_DEBUG("CommImpl::post(): comm %p, state %s, src_proc %p, dst_proc %p, detached: %d", this, get_state_str(), + src_actor_.get(), dst_actor_.get(), detached_); /* destroy the surf actions associated with the Simix communication */ - cleanupSurf(); + cleanup_surf(); - /* if there are simcalls associated with the synchro, then answer them */ - if (not simcalls.empty()) { - SIMIX_comm_finish(this); + /* Answer all simcalls associated with the synchro */ + finish(); +} + +void CommImpl::finish() +{ + XBT_DEBUG("CommImpl::finish() in state %s", to_c_str(state_)); + + /* If the synchro is still in a rendez-vous point then remove from it */ + if (mbox_) + mbox_->remove(this); + + if (state_ == State::DONE) + copy_data(); + + while (not simcalls_.empty()) { + smx_simcall_t simcall = simcalls_.front(); + simcalls_.pop_front(); + + /* If a waitany simcall is waiting for this synchro to finish, then remove it from the other synchros in the waitany + * list. Afterwards, get the position of the actual synchro in the waitany list and return it as the result of the + * simcall */ + + if (simcall->call_ == simix::Simcall::NONE) // FIXME: maybe a better way to handle this case + continue; // if actor handling comm is killed + if (simcall->call_ == simix::Simcall::COMM_WAITANY) { + CommImpl** comms = simcall_comm_waitany__get__comms(simcall); + size_t count = simcall_comm_waitany__get__count(simcall); + for (size_t i = 0; i < count; i++) + comms[i]->unregister_simcall(simcall); + if (simcall->timeout_cb_) { + simcall->timeout_cb_->remove(); + simcall->timeout_cb_ = nullptr; + } + if (not MC_is_active() && not MC_record_replay_is_active()) { + CommImpl** element = std::find(comms, comms + count, this); + ssize_t rank = (element != comms + count) ? element - comms : -1; + simcall_comm_waitany__set__result(simcall, rank); + } + } + + /* Check out for errors */ + + if (not simcall->issuer_->get_host()->is_on()) { + simcall->issuer_->context_->set_wannadie(); + } else { + switch (state_) { + case State::FAILED: + simcall->issuer_->exception_ = + std::make_exception_ptr(NetworkFailureException(XBT_THROW_POINT, "Remote peer failed")); + break; + case State::SRC_TIMEOUT: + simcall->issuer_->exception_ = std::make_exception_ptr( + TimeoutException(XBT_THROW_POINT, "Communication timeouted because of the sender")); + break; + + case State::DST_TIMEOUT: + simcall->issuer_->exception_ = std::make_exception_ptr( + TimeoutException(XBT_THROW_POINT, "Communication timeouted because of the receiver")); + break; + + case State::SRC_HOST_FAILURE: + if (simcall->issuer_ == src_actor_) + simcall->issuer_->context_->set_wannadie(); + else { + state_ = kernel::activity::State::FAILED; + simcall->issuer_->exception_ = + std::make_exception_ptr(NetworkFailureException(XBT_THROW_POINT, "Remote peer failed")); + } + break; + + case State::DST_HOST_FAILURE: + if (simcall->issuer_ == dst_actor_) + simcall->issuer_->context_->set_wannadie(); + else { + state_ = kernel::activity::State::FAILED; + simcall->issuer_->exception_ = + std::make_exception_ptr(NetworkFailureException(XBT_THROW_POINT, "Remote peer failed")); + } + break; + + case State::LINK_FAILURE: + XBT_DEBUG("Link failure in synchro %p between '%s' and '%s': posting an exception to the issuer: %s (%p) " + "detached:%d", + this, src_actor_ ? src_actor_->get_host()->get_cname() : nullptr, + dst_actor_ ? dst_actor_->get_host()->get_cname() : nullptr, simcall->issuer_->get_cname(), + simcall->issuer_, detached_); + if (src_actor_ == simcall->issuer_) { + XBT_DEBUG("I'm source"); + } else if (dst_actor_ == simcall->issuer_) { + XBT_DEBUG("I'm dest"); + } else { + XBT_DEBUG("I'm neither source nor dest"); + } + state_ = kernel::activity::State::FAILED; + simcall->issuer_->throw_exception( + std::make_exception_ptr(NetworkFailureException(XBT_THROW_POINT, "Link failure"))); + break; + + case State::CANCELED: + if (simcall->issuer_ == dst_actor_) + simcall->issuer_->exception_ = + std::make_exception_ptr(CancelException(XBT_THROW_POINT, "Communication canceled by the sender")); + else + simcall->issuer_->exception_ = + std::make_exception_ptr(CancelException(XBT_THROW_POINT, "Communication canceled by the receiver")); + break; + + default: + xbt_assert(state_ == State::DONE, "Internal error in CommImpl::finish(): unexpected synchro state %s", + to_c_str(state_)); + } + simcall->issuer_->simcall_answer(); + } + /* if there is an exception during a waitany or a testany, indicate the position of the failed communication */ + if (simcall->issuer_->exception_ && + (simcall->call_ == simix::Simcall::COMM_WAITANY || simcall->call_ == simix::Simcall::COMM_TESTANY)) { + // First retrieve the rank of our failing synchro + CommImpl** comms; + size_t count; + if (simcall->call_ == simix::Simcall::COMM_WAITANY) { + comms = simcall_comm_waitany__get__comms(simcall); + count = simcall_comm_waitany__get__count(simcall); + } else { + /* simcall->call_ == simix::Simcall::COMM_TESTANY */ + comms = simcall_comm_testany__get__comms(simcall); + count = simcall_comm_testany__get__count(simcall); + } + CommImpl** element = std::find(comms, comms + count, this); + ssize_t rank = (element != comms + count) ? element - comms : -1; + // In order to modify the exception we have to rethrow it: + try { + std::rethrow_exception(simcall->issuer_->exception_); + } catch (Exception& e) { + e.set_value(rank); + } + } + + simcall->issuer_->waiting_synchro_ = nullptr; + simcall->issuer_->activities_.remove(this); + if (detached_) { + if (simcall->issuer_ != dst_actor_ && dst_actor_ != nullptr) + dst_actor_->activities_.remove(this); + if (simcall->issuer_ != src_actor_ && src_actor_ != nullptr) + src_actor_->activities_.remove(this); + } } } + +} // namespace activity +} // namespace kernel +} // namespace simgrid