X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/7e42dd535dfc0d68de20fba4b9fc5e480b56c74b..4c206c2ab2737c12672b8bc7aab7b0ea2cc99484:/src/kernel/context/ContextRaw.cpp diff --git a/src/kernel/context/ContextRaw.cpp b/src/kernel/context/ContextRaw.cpp index a0c065fcfa..fe8243da01 100644 --- a/src/kernel/context/ContextRaw.cpp +++ b/src/kernel/context/ContextRaw.cpp @@ -186,46 +186,19 @@ namespace context { // RawContextFactory -RawContextFactory::RawContextFactory() : ContextFactory("RawContextFactory"), parallel_(SIMIX_context_is_parallel()) -{ - RawContext::set_maestro(nullptr); - if (parallel_) { - // TODO: choose dynamically when SIMIX_context_get_parallel_threshold() > 1 - ParallelRawContext::initialize(); - } -} - -RawContextFactory::~RawContextFactory() -{ - if (parallel_) - ParallelRawContext::finalize(); -} - Context* RawContextFactory::create_context(std::function code, void_pfn_smxprocess_t cleanup_func, smx_actor_t process) { - if (parallel_) - return this->new_context(std::move(code), cleanup_func, process); - return this->new_context(std::move(code), cleanup_func, process); -} - -void RawContextFactory::run_all() -{ - if (parallel_) - ParallelRawContext::run_all(); - else - SerialRawContext::run_all(); + return this->new_context(std::move(code), cleanup_func, process, this); } // RawContext -RawContext* RawContext::maestro_context_ = nullptr; - -RawContext::RawContext(std::function code, void_pfn_smxprocess_t cleanup, smx_actor_t process) - : Context(std::move(code), cleanup, process) +RawContext::RawContext(std::function code, void_pfn_smxprocess_t cleanup, smx_actor_t process, + SwappedContextFactory* factory) + : SwappedContext(std::move(code), cleanup, process, factory) { if (has_code()) { - this->stack_ = SIMIX_context_stack_new(); #if PTH_STACKGROWTH == -1 ASAN_ONLY(this->asan_stack_ = static_cast(this->stack_) + smx_context_usable_stack_size); #else @@ -233,17 +206,16 @@ RawContext::RawContext(std::function code, void_pfn_smxprocess_t cleanup #endif this->stack_top_ = raw_makecontext(this->stack_, smx_context_usable_stack_size, RawContext::wrapper, this); } else { - if (process != nullptr && maestro_context_ == nullptr) - maestro_context_ = this; - if (MC_is_active()) - MC_ignore_heap(&maestro_context_->stack_top_, sizeof(maestro_context_->stack_top_)); + if (process != nullptr && get_maestro() == nullptr) + set_maestro(this); + if (MC_is_active()) { + XBT_ATTRIB_UNUSED RawContext* maestro = static_cast(get_maestro()); + MC_ignore_heap(&maestro->stack_top_, sizeof(maestro->stack_top_)); + } } } -RawContext::~RawContext() -{ - SIMIX_context_stack_delete(this->stack_); -} +RawContext::~RawContext() = default; void RawContext::wrapper(void* arg) { @@ -263,124 +235,16 @@ void RawContext::wrapper(void* arg) context->suspend(); } -inline void RawContext::swap(RawContext* from, RawContext* to) +void RawContext::swap_into(SwappedContext* to_) { + RawContext* to = static_cast(to_); ASAN_ONLY(void* fake_stack = nullptr); ASAN_ONLY(to->asan_ctx_ = from); ASAN_START_SWITCH(from->asan_stop_ ? nullptr : &fake_stack, to->asan_stack_, to->asan_stack_size_); - raw_swapcontext(&from->stack_top_, to->stack_top_); + raw_swapcontext(&this->stack_top_, to->stack_top_); ASAN_FINISH_SWITCH(fake_stack, &from->asan_ctx_->asan_stack_, &from->asan_ctx_->asan_stack_size_); } -void RawContext::stop() -{ - Context::stop(); - throw StopRequest(); -} - -// SerialRawContext - -unsigned long SerialRawContext::process_index_; /* index of the next process to run in the list of runnable processes */ - -void SerialRawContext::suspend() -{ - /* determine the next context */ - SerialRawContext* next_context; - unsigned long int i = process_index_; - process_index_++; - if (i < simix_global->process_to_run.size()) { - /* execute the next process */ - XBT_DEBUG("Run next process"); - next_context = static_cast(simix_global->process_to_run[i]->context_); - } else { - /* all processes were run, return to maestro */ - XBT_DEBUG("No more process to run"); - next_context = static_cast(RawContext::get_maestro()); - } - Context::set_current(next_context); - RawContext::swap(this, next_context); -} - -void SerialRawContext::resume() -{ - Context::set_current(this); - RawContext::swap(RawContext::get_maestro(), this); -} - -void SerialRawContext::run_all() -{ - if (simix_global->process_to_run.empty()) - return; - smx_actor_t first_process = simix_global->process_to_run.front(); - process_index_ = 1; - static_cast(first_process->context_)->resume(); -} - -// ParallelRawContext - -simgrid::xbt::Parmap* ParallelRawContext::parmap_; -std::atomic ParallelRawContext::threads_working_; /* number of threads that have started their work */ -uintptr_t thread_local ParallelRawContext::worker_id_; /* thread-specific storage for the thread id */ -std::vector ParallelRawContext::workers_context_; /* space to save the worker context - in each thread */ - -void ParallelRawContext::initialize() -{ - parmap_ = nullptr; - workers_context_.clear(); - workers_context_.resize(SIMIX_context_get_nthreads(), nullptr); -} - -void ParallelRawContext::finalize() -{ - delete parmap_; - parmap_ = nullptr; - workers_context_.clear(); -} - -void ParallelRawContext::run_all() -{ - threads_working_ = 0; - if (parmap_ == nullptr) - parmap_ = new simgrid::xbt::Parmap(SIMIX_context_get_nthreads(), SIMIX_context_get_parallel_mode()); - parmap_->apply( - [](smx_actor_t process) { - ParallelRawContext* context = static_cast(process->context_); - context->resume(); - }, - simix_global->process_to_run); -} - -void ParallelRawContext::suspend() -{ - /* determine the next context */ - boost::optional next_work = parmap_->next(); - ParallelRawContext* next_context; - if (next_work) { - /* there is a next process to resume */ - XBT_DEBUG("Run next process"); - next_context = static_cast(next_work.get()->context_); - } else { - /* all processes were run, go to the barrier */ - XBT_DEBUG("No more processes to run"); - next_context = workers_context_[worker_id_]; - XBT_DEBUG("Restoring worker stack %zu (working threads = %zu)", worker_id_, threads_working_.load()); - } - - Context::set_current(next_context); - RawContext::swap(this, next_context); -} - -void ParallelRawContext::resume() -{ - worker_id_ = threads_working_.fetch_add(1, std::memory_order_relaxed); - ParallelRawContext* worker_context = static_cast(self()); - workers_context_[worker_id_] = worker_context; - XBT_DEBUG("Saving worker stack %zu", worker_id_); - Context::set_current(this); - RawContext::swap(worker_context, this); -} - ContextFactory* raw_factory() { XBT_VERB("Using raw contexts. Because the glibc is just not good enough for us.");