X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/7420611a5e7337548a930583a48330f8d47959e8..239cd16f4e95031d3a106e487c1485726069f1d7:/src/mc/api/State.cpp diff --git a/src/mc/api/State.cpp b/src/mc/api/State.cpp index 25c8cde67c..90045f501b 100644 --- a/src/mc/api/State.cpp +++ b/src/mc/api/State.cpp @@ -1,114 +1,142 @@ -/* Copyright (c) 2008-2022. The SimGrid Team. All rights reserved. */ +/* Copyright (c) 2008-2023. 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/mc/api/State.hpp" -#include "src/mc/Session.hpp" -#include "src/mc/api.hpp" +#include "src/mc/explo/Exploration.hpp" #include "src/mc/mc_config.hpp" #include XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_state, mc, "Logging specific to MC states"); -using simgrid::mc::remote; -using api = simgrid::mc::Api; - -namespace simgrid { -namespace mc { +namespace simgrid::mc { long State::expended_states_ = 0; -State::State() : num_(++expended_states_) +State::State(RemoteApp& remote_app) : num_(++expended_states_) { - const unsigned long maxpid = api::get().get_maxpid(); - actor_states_.resize(maxpid); - transition_.reset(new Transition()); + remote_app.get_actors_status(actors_to_run_); + /* Stateful model checking */ - if ((_sg_mc_checkpoint > 0 && (num_ % _sg_mc_checkpoint == 0)) || _sg_mc_termination) { - auto snapshot_ptr = api::get().take_snapshot(num_); - system_state_ = std::shared_ptr(snapshot_ptr); - if (_sg_mc_comms_determinism || _sg_mc_send_determinism) { - copy_incomplete_comm_pattern(); - copy_index_comm_pattern(); - } + if ((_sg_mc_checkpoint > 0 && (num_ % _sg_mc_checkpoint == 0)) || _sg_mc_termination) + system_state_ = std::make_shared(num_, remote_app.get_page_store(), + remote_app.get_remote_process_memory()); +} + +State::State(RemoteApp& remote_app, const State* parent_state) + : num_(++expended_states_), parent_state_(parent_state) +{ + + remote_app.get_actors_status(actors_to_run_); + + /* Stateful model checking */ + if ((_sg_mc_checkpoint > 0 && (num_ % _sg_mc_checkpoint == 0)) || _sg_mc_termination) + system_state_ = std::make_shared(num_, remote_app.get_page_store(), + remote_app.get_remote_process_memory()); + + + /* If we want sleep set reduction, copy the sleep set and eventually removes things from it */ + if (_sg_mc_sleep_set) { + /* For each actor in the previous sleep set, keep it if it is not dependent with current transition. + * And if we kept it and the actor is enabled in this state, mark the actor as already done, so that + * it is not explored*/ + for (auto& [aid, transition] : parent_state_->get_sleep_set()) { + + if (not parent_state_->get_transition()->depends(&transition)) { + + sleep_set_.emplace(aid, transition); + if (actors_to_run_.count(aid) != 0) { + XBT_DEBUG("Actor %ld will not be explored, for it is in the sleep set", aid); + + actors_to_run_.at(aid).mark_done(); + } + } else + XBT_DEBUG("Transition >>%s<< removed from the sleep set because it was dependent with >>%s<<", + transition.to_string().c_str(), parent_state_->get_transition()->to_string().c_str()); + } } } std::size_t State::count_todo() const { - return boost::range::count_if(this->actor_states_, [](simgrid::mc::ActorState const& a) { return a.is_todo(); }); + return boost::range::count_if(this->actors_to_run_, [](auto& pair) { return pair.second.is_todo(); }); } -Transition* State::get_transition() const +void State::mark_all_enabled_todo() { - return transition_.get(); + for (auto const& [aid, _] : this->get_actors_list()) { + if (this->is_actor_enabled(aid) and not is_actor_done(aid)) { + this->mark_todo(aid); + } + } } -int State::next_transition() const +Transition* State::get_transition() const { - std::vector& actors = mc_model_checker->get_remote_process().actors(); - XBT_DEBUG("Search for an actor to run. %zu actors to consider", actors.size()); - for (unsigned int i = 0; i < actors.size(); i++) { - aid_t aid = actors[i].copy.get_buffer()->get_pid(); - const ActorState* actor_state = &actor_states_[aid]; - - /* Only consider actors (1) marked as interleaving by the checker and (2) currently enabled in the application*/ - if (not actor_state->is_todo() || not simgrid::mc::session_singleton->actor_is_enabled(aid)) - continue; - - return i; - } - return -1; + return transition_; } -void State::execute_next(int next) + +aid_t State::next_transition() const { - std::vector& actors = mc_model_checker->get_remote_process().actors(); - - kernel::actor::ActorImpl* actor = actors[next].copy.get_buffer(); - aid_t aid = actor->get_pid(); - int times_considered; - - simgrid::mc::ActorState* actor_state = &actor_states_[aid]; - /* This actor is ready to be executed. Prepare its execution when simcall_handle will be called on it */ - if (actor->simcall_.observer_ != nullptr) { - times_considered = actor_state->get_times_considered_and_inc(); - if (actor->simcall_.mc_max_consider_ <= actor_state->get_times_considered()) - actor_state->set_done(); - } else { - times_considered = 0; - actor_state->set_done(); - } + XBT_DEBUG("Search for an actor to run. %zu actors to consider", actors_to_run_.size()); + for (auto const& [aid, actor] : actors_to_run_) { + /* Only consider actors (1) marked as interleaving by the checker and (2) currently enabled in the application */ + if (not actor.is_todo() || not actor.is_enabled() || actor.is_done()) { - executed_req_ = actor->simcall_; + if (not actor.is_todo()) + XBT_DEBUG("Can't run actor %ld because it is not todo", aid); - XBT_DEBUG("Let's run actor %ld (times_considered = %d)", aid, times_considered); + if (not actor.is_enabled()) + XBT_DEBUG("Can't run actor %ld because it is not enabled", aid); - Transition::executed_transitions_++; + if (actor.is_done()) + XBT_DEBUG("Can't run actor %ld because it has already been done", aid); - transition_.reset(mc_model_checker->handle_simcall(aid, times_considered, true)); - mc_model_checker->wait_for_requests(); -} + continue; + } -void State::copy_incomplete_comm_pattern() -{ - incomplete_comm_pattern_.clear(); - const unsigned long maxpid = api::get().get_maxpid(); - for (unsigned long i = 0; i < maxpid; i++) { - std::vector res; - for (auto const& comm : incomplete_communications_pattern[i]) - res.push_back(comm->dup()); - incomplete_comm_pattern_.push_back(std::move(res)); + return aid; } + return -1; } -void State::copy_index_comm_pattern() +void State::execute_next(aid_t next, RemoteApp& app) { - communication_indices_.clear(); - for (auto const& list_process_comm : initial_communications_pattern) - this->communication_indices_.push_back(list_process_comm.index_comm); -} + // This actor is ready to be executed. Execution involves three phases: + + // 1. Identify the appropriate ActorState to prepare for execution + // when simcall_handle will be called on it + auto& actor_state = actors_to_run_.at(next); + const unsigned times_considered = actor_state.do_consider(); + const auto* expected_executed_transition = actor_state.get_transition(times_considered); + xbt_assert(expected_executed_transition != nullptr, + "Expected a transition with %u times considered to be noted in actor %ld", times_considered, next); -} // namespace mc -} // namespace simgrid + XBT_DEBUG("Let's run actor %ld (times_considered = %u)", next, times_considered); + + // 2. Execute the actor according to the preparation above + Transition::executed_transitions_++; + auto* just_executed = app.handle_simcall(next, times_considered, true); + xbt_assert(just_executed->type_ == expected_executed_transition->type_, + "The transition that was just executed by actor %ld, viz:\n" + "%s\n" + "is not what was purportedly scheduled to execute, which was:\n" + "%s\n", + next, just_executed->to_string().c_str(), expected_executed_transition->to_string().c_str()); + + // 3. Update the state with the newest information. This means recording + // both + // 1. what action was last taken from this state (viz. `executed_transition`) + // 2. what action actor `next` was able to take given `times_considered` + // The latter update is important as *more* information is potentially available + // about a transition AFTER it has executed. + transition_ = just_executed; + + auto executed_transition = std::unique_ptr(just_executed); + actor_state.set_transition(std::move(executed_transition), times_considered); + + app.wait_for_requests(); +} +} // namespace simgrid::mc