"When non-negative, raise a SIGTRAP after given (simulated) time", -1.0};
config::Flag<bool> cfg_verbose_exit{"debug/verbose-exit", "Display the actor status at exit", true};
-xbt_dynar_t get_actors_addr()
-{
-#if SIMGRID_HAVE_MC
- return EngineImpl::get_instance()->get_actors_vector();
-#else
- xbt_die("This function is intended to be used when compiling with MC");
-#endif
-}
-
-xbt_dynar_t get_dead_actors_addr()
-{
-#if SIMGRID_HAVE_MC
- return EngineImpl::get_instance()->get_dead_actors_vector();
-#else
- xbt_die("This function is intended to be used when compiling with MC");
-#endif
-}
-
constexpr std::initializer_list<std::pair<const char*, context::ContextFactoryInitializer>> context_factories = {
#if HAVE_RAW_CONTEXTS
{"raw", &context::raw_factory},
for (auto const& kv : mailboxes_)
delete kv.second;
- /* Free the remaining data structures */
+ /* Kill all actors (but maestro) */
+ maestro_->kill_all();
+ run_all_actors();
+ empty_trash();
+
+ delete maestro_;
+ delete context_factory_;
+
+ /* Free the remaining data structures */
#if SIMGRID_HAVE_MC
xbt_dynar_free(&actors_vector_);
- xbt_dynar_free(&dead_actors_vector_);
#endif
/* clear models before freeing handle, network models can use external callback defined in the handle */
models_prio_.clear();
EngineImpl::instance_ = this;
#if SIMGRID_HAVE_MC
// The communication initialization is done ASAP, as we need to get some init parameters from the MC for different
- // layers. But simix_global needs to be created, as we send the address of some of its fields to the MC that wants to
+ // layers. But instance_ needs to be created, as we send the address of some of its fields to the MC that wants to
// read them directly.
- simgrid::mc::AppSide::initialize();
+ simgrid::mc::AppSide::initialize(actors_vector_);
#endif
if (xbt_initialized == 0) {
xbt_die("Bailing out to avoid that stop-before-start madness. Please fix your code.");
}
- /* Kill all actors (but maestro) */
- instance_->maestro_->kill_all();
- instance_->run_all_actors();
- instance_->empty_trash();
-
- /* Let's free maestro now */
- delete instance_->maestro_;
- instance_->maestro_ = nullptr;
-
- /* Finish context module and SURF */
- instance_->destroy_context_factory();
-
while (not timer::kernel_timers().empty()) {
delete timer::kernel_timers().top().second;
timer::kernel_timers().pop();
void EngineImpl::seal_platform() const
{
+ /* Seal only once */
+ static bool sealed = false;
+ if (sealed)
+ return;
+ sealed = true;
+
/* sealing resources before run: links */
for (auto const& kv : links_)
kv.second->get_iface()->seal();
void EngineImpl::load_platform(const std::string& platf)
{
double start = xbt_os_time();
- if (boost::algorithm::ends_with(platf, ".so") or boost::algorithm::ends_with(platf, ".dylib")) {
+ if (boost::algorithm::ends_with(platf, ".so") || boost::algorithm::ends_with(platf, ".dylib")) {
#ifdef _WIN32
xbt_die("loading platform through shared library isn't supported on windows");
#else
}
/** Wake up all actors waiting for a Surf action to finish */
-void EngineImpl::wake_all_waiting_actors() const
+void EngineImpl::handle_ended_actions() const
{
for (auto const& model : models_) {
XBT_DEBUG("Handling the failed actions (if any)");
while (auto* action = model->extract_failed_action()) {
XBT_DEBUG(" Handling Action %p", action);
- if (action->get_activity() != nullptr) {
- // If nobody told the interface that the activity has failed, that's because no actor waits on it (maestro
- // started it). SimDAG I see you!
+ if (action->get_activity() != nullptr) { // Skip vcpu actions
+ // Action failures are not automatically reported when the action is started by maestro (as in SimDAG)
if (action->get_activity()->get_actor() == maestro_)
action->get_activity()->get_iface()->complete(s4u::Activity::State::FAILED);
XBT_DEBUG("Handling the terminated actions (if any)");
while (auto* action = model->extract_done_action()) {
XBT_DEBUG(" Handling Action %p", action);
- if (action->get_activity() == nullptr)
- XBT_DEBUG("probably vcpu's action %p, skip", action);
- else {
- // If nobody told the interface that the activity is finished, that's because no actor waits on it (maestro
- // started it). SimDAG I see you!
+ if (action->get_activity() != nullptr) {
+ // Action termination are not automatically reported when the action is started by maestro (as in SimDAG)
action->get_activity()->set_finish_time(action->get_finish_time());
if (action->get_activity()->get_actor() == maestro_)
*/
void EngineImpl::run_all_actors()
{
- instance_->get_context_factory()->run_all();
+ instance_->get_context_factory()->run_all(actors_to_run_);
+
+ for (auto const& actor : actors_to_run_)
+ if (actor->to_be_freed())
+ actor->cleanup_from_kernel();
actors_to_run_.swap(actors_that_ran_);
actors_to_run_.clear();
if (item != actor_list_.end())
return item->second;
- // Search the trash
- for (auto& a : actors_to_destroy_)
- if (a.get_pid() == pid)
- return &a;
- return nullptr; // Not found, even in the trash
-}
-
-/** Execute all the tasks that are queued, e.g. `.then()` callbacks of futures. */
-bool EngineImpl::execute_tasks()
-{
- if (tasks.empty())
- return false;
-
- std::vector<xbt::Task<void()>> tasksTemp;
- do {
- // We don't want the callbacks to modify the vector we are iterating over:
- tasks.swap(tasksTemp);
-
- // Execute all the queued tasks:
- for (auto& task : tasksTemp)
- task();
-
- tasksTemp.clear();
- } while (not tasks.empty());
-
- return true;
+ return nullptr; // Not found
}
void EngineImpl::remove_daemon(actor::ActorImpl* actor)
XBT_DEBUG("Getting rid of %s (refcount: %d)", actor->get_cname(), actor->get_refcount());
intrusive_ptr_release(actor);
}
-#if SIMGRID_HAVE_MC
- xbt_dynar_reset(dead_actors_vector_);
-#endif
}
void EngineImpl::display_all_actor_status() const
actor->waiting_synchro_->get_cname(), actor->waiting_synchro_->get_state_str());
} else {
XBT_INFO("Actor %ld (%s@%s) simcall %s", actor->get_pid(), actor->get_cname(), actor->get_host()->get_cname(),
- SIMIX_simcall_name(actor->simcall_));
+ actor->simcall_.get_cname());
}
}
}
{
seal_platform();
+ if (MC_is_active()) {
+#if SIMGRID_HAVE_MC
+ mc::AppSide::get()->main_loop();
+#else
+ xbt_die("MC_is_active() is not supposed to return true in non-MC settings");
+#endif
+ THROW_IMPOSSIBLE; // main_loop never returns
+ }
+
if (MC_record_replay_is_active()) {
mc::RecordTrace::replay(MC_record_path());
empty_trash();
if (cfg_breakpoint >= 0.0 && simgrid_get_clock() >= cfg_breakpoint) {
XBT_DEBUG("Breakpoint reached (%g)", cfg_breakpoint.get());
- cfg_breakpoint = -1.0;
+ cfg_breakpoint = -1.0; // Let the simulation continue without hiting the breakpoint again and again
#ifdef SIGTRAP
std::raise(SIGTRAP);
#else
#endif
}
- execute_tasks();
-
while (not actors_to_run_.empty()) {
XBT_DEBUG("New Sub-Schedule Round; size(queue)=%zu", actors_to_run_.size());
/* Run all actors that are ready to run, possibly in parallel */
run_all_actors();
- /* answer sequentially and in a fixed arbitrary order all the simcalls that were issued during that sub-round */
-
- /* WARNING, the order *must* be fixed or you'll jeopardize the simulation reproducibility (see RR-7653) */
-
- /* Here, the order is ok because:
- *
- * Short proof: only maestro adds stuff to the actors_to_run array, so the execution order of user contexts do
- * not impact its order.
- *
- * Long proof: actors remain sorted through an arbitrary (implicit, complex but fixed) order in all cases.
- *
- * - if there is no kill during the simulation, actors remain sorted according by their PID.
- * Rationale: This can be proved inductively.
- * Assume that actors_to_run is sorted at a beginning of one round (it is at round 0: the deployment file
- * is parsed linearly).
- * Let's show that it is still so at the end of this round.
- * - if an actor is added when being created, that's from maestro. It can be either at startup
- * time (and then in PID order), or in response to a process_create simcall. Since simcalls are handled
- * in arbitrary order (inductive hypothesis), we are fine.
- * - If an actor is added because it's getting killed, its subsequent actions shouldn't matter
- * - If an actor gets added to actors_to_run because one of their blocking action constituting the meat
- * of a simcall terminates, we're still good. Proof:
- * - You are added from ActorImpl::simcall_answer() only. When this function is called depends on the
- * resource kind (network, cpu, disk, whatever), but the same arguments hold. Let's take communications
- * as an example.
- * - For communications, this function is called from CommImpl::finish().
- * This function itself don't mess with the order since simcalls are handled in FIFO order.
- * The function is called:
- * - before the comm starts (invalid parameters, or resource already dead or whatever).
- * The order then trivial holds since maestro didn't interrupt its handling of the simcall yet
- * - because the communication failed or were canceled after startup. In this case, it's called from
- * the function we are in, by the chunk:
- * set = model->states.failed_action_set;
- * while ((synchro = extract(set)))
- * SIMIX_simcall_post((smx_synchro_t) synchro->data);
- * This order is also fixed because it depends of the order in which the surf actions were
- * added to the system, and only maestro can add stuff this way, through simcalls.
- * We thus use the inductive hypothesis once again to conclude that the order in which synchros are
- * popped out of the set does not depend on the user code's execution order.
- * - because the communication terminated. In this case, synchros are served in the order given by
- * set = model->states.done_action_set;
- * while ((synchro = extract(set)))
- * SIMIX_simcall_post((smx_synchro_t) synchro->data);
- * and the argument is very similar to the previous one.
- * So, in any case, the orders of calls to CommImpl::finish() do not depend on the order in which user
- * actors are executed.
- * So, in any cases, the orders of actors within actors_to_run do not depend on the order in which
- * user actors were executed previously.
- * So, if there is no killing in the simulation, the simulation reproducibility is not jeopardized.
- * - If there is some actor killings, the order is changed by this decision that comes from user-land
- * But this decision may not have been motivated by a situation that were different because the simulation is
- * not reproducible.
- * So, even the order change induced by the actor killing is perfectly reproducible.
- *
- * So science works, bitches [http://xkcd.com/54/].
- *
- * We could sort the actors_that_ran array completely so that we can describe the order in which simcalls are
- * handled (like "according to the PID of issuer"), but it's not mandatory (order is fixed already even if
- * unfriendly).
- * That would thus be a pure waste of time.
+ /* answer sequentially and in a fixed arbitrary order all the simcalls that were issued during that sub-round.
+ * The order must be fixed for the simulation to be reproducible (see RR-7653). It's OK here because only maestro
+ * changes the list. Killer actors are moved to the end to let victims finish their simcall before dying, but
+ * the order remains reproducible (even if arbitrarily). No need to sort the vector for sake of reproducibility.
*/
-
- for (auto const& actor : actors_that_ran_) {
- if (actor->simcall_.call_ != simix::Simcall::NONE) {
+ for (auto const& actor : actors_that_ran_)
+ if (actor->simcall_.call_ != actor::Simcall::Type::NONE)
actor->simcall_handle(0);
- }
- }
- execute_tasks();
- do {
- wake_all_waiting_actors();
- } while (execute_tasks());
+ handle_ended_actions();
/* If only daemon actors remain, cancel their actions, mark them to die and reschedule them */
if (actor_list_.size() == daemons_.size())
elapsed_time = solve(next_time);
XBT_DEBUG("Moving time ahead. NOW=%g; elapsed: %g", NOW, elapsed_time);
- /* Notify all the hosts that have failed */
- /* FIXME: iterate through the list of failed host and mark each of them */
- /* as failed. On each host, signal all the running actors with host_fail */
-
- // Execute timers and tasks until there isn't anything to be done:
+ // Execute timers until there isn't anything to be done:
bool again = false;
do {
again = timer::Timer::execute_all();
- if (execute_tasks())
- again = true;
- wake_all_waiting_actors();
+ handle_ended_actions();
} while (again);
/* Clean actors to destroy */
}
} // namespace kernel
} // namespace simgrid
-
-void SIMIX_run() // XBT_ATTRIB_DEPRECATED_v332
-{
- simgrid::kernel::EngineImpl::get_instance()->run(-1);
-}
