#ifdef CONTEXT_THREADS
static xbt_parmap_t raw_parmap;
-static raw_stack_t* raw_workers_stacks; /* space to save the worker stack in each thread */
+static raw_stack_t* raw_workers_stacks; /* space to save the worker stack in each thread */
+static unsigned long raw_threads_working; /* number of threads that have started their work */
+static xbt_os_thread_key_t raw_worker_id_key; /* thread-specific storage for the thread id */
#endif
static unsigned long raw_process_index = 0; /* index of the next process to run in the
* list of runnable processes */
-smx_ctx_raw_t raw_maestro_context;
+static smx_ctx_raw_t raw_maestro_context;
extern raw_stack_t raw_makecontext(char* malloced_stack, int stack_size,
rawctx_entry_point_t entry_point, void* arg);
static void smx_ctx_raw_runall_parallel(void);
static void smx_ctx_raw_runall(void);
+/**
+ * \brief Initializes the raw context factory.
+ * \param factory where to initialize the factory
+ */
void SIMIX_ctx_raw_factory_init(smx_context_factory_t *factory)
{
XBT_VERB("Using raw contexts. Because the glibc is just not good enough for us.");
int nthreads = SIMIX_context_get_nthreads();
raw_parmap = xbt_parmap_new(nthreads);
raw_workers_stacks = xbt_new(raw_stack_t, nthreads);
+ xbt_os_thread_key_create(&raw_worker_id_key);
#endif
if (SIMIX_context_get_parallel_threshold() > 1) {
/* choose dynamically */
#endif
}
+/**
+ * \brief Finalizes the raw context factory.
+ * \param factory the raw context factory
+ */
static int smx_ctx_raw_factory_finalize(smx_context_factory_t *factory)
{
#ifdef TIME_BENCH
return smx_ctx_base_factory_finalize(factory);
}
+/**
+ * \brief Creates a new raw context.
+ * \param code main function of this context or NULL to create the maestro
+ * context
+ * \param argc argument number
+ * \param argv arguments to pass to the main function
+ * \param cleanup_func a function to call to free the user data when the
+ * context finished
+ * \param data user data
+ */
static smx_context_t
smx_ctx_raw_create_context(xbt_main_func_t code, int argc, char **argv,
void_pfn_smxprocess_t cleanup_func,
context->malloced_stack = xbt_malloc0(smx_context_stack_size);
context->stack_top =
raw_makecontext(context->malloced_stack, smx_context_stack_size,
- (void(*)(void*))smx_ctx_raw_wrapper,context);
+ (void_f_pvoid_t) smx_ctx_raw_wrapper, context);
#ifdef HAVE_VALGRIND_VALGRIND_H
context->valgrind_stack_id =
return (smx_context_t) context;
}
+/**
+ * \brief Destroys a raw context.
+ * \param context a raw context
+ */
static void smx_ctx_raw_free(smx_context_t context)
{
context)->valgrind_stack_id);
#endif /* HAVE_VALGRIND_VALGRIND_H */
- free(((smx_ctx_raw_t)context)->malloced_stack);
+ free(((smx_ctx_raw_t) context)->malloced_stack);
}
smx_ctx_base_free(context);
}
+/**
+ * \brief Wrapper for the main function of a context.
+ * \param context a raw context
+ */
static void smx_ctx_raw_wrapper(smx_ctx_raw_t context)
{
(context->super.code) (context->super.argc, context->super.argv);
smx_ctx_raw_stop((smx_context_t) context);
}
+/**
+ * \brief Stops a raw context.
+ *
+ * This function is called when the main function of the context if finished.
+ *
+ * \param context the current context
+ */
static void smx_ctx_raw_stop(smx_context_t context)
{
smx_ctx_base_stop(context);
simix_global->context_factory->suspend(context);
}
+/**
+ * \brief Suspends a running context and resumes another one or returns to
+ * maestro.
+ * \param context the current context
+ */
static void smx_ctx_raw_suspend_serial(smx_context_t context)
{
/* determine the next context */
/* execute the next process */
XBT_DEBUG("Run next process");
next_context = xbt_dynar_get_as(
- simix_global->process_to_run,i, smx_process_t)->context;
+ simix_global->process_to_run, i, smx_process_t)->context;
}
else {
/* all processes were run, return to maestro */
((smx_ctx_raw_t) next_context)->stack_top);
}
+/**
+ * \brief Resumes sequentially all processes ready to run.
+ * \param first_process the first process to resume
+ */
static void smx_ctx_raw_resume_serial(smx_process_t first_process)
{
smx_ctx_raw_t context = (smx_ctx_raw_t) first_process->context;
XBT_VERB("New scheduling round");
}
#else
+
+/**
+ * \brief Resumes sequentially all processes ready to run.
+ */
static void smx_ctx_raw_runall_serial(void)
{
if (!xbt_dynar_is_empty(simix_global->process_to_run)) {
}
#endif
+/**
+ * \brief Stops a raw context.
+ *
+ * This function is called when the main function of the context if finished.
+ *
+ * \param context the context of the current worker thread
+ */
static void smx_ctx_raw_stop_parallel(smx_context_t context)
{
smx_ctx_base_stop(context);
smx_ctx_raw_suspend_parallel(context);
}
+/**
+ * \brief Suspends a running context and resumes another one or returns to
+ * the main function of the current worker thread.
+ * \param context the context of the current worker thread
+ */
static void smx_ctx_raw_suspend_parallel(smx_context_t context)
{
#ifdef CONTEXT_THREADS
/* all processes were run, go to the barrier */
XBT_DEBUG("No more processes to run");
next_context = (smx_context_t) raw_maestro_context;
- unsigned long worker_id = xbt_parmap_get_worker_id(raw_parmap);
+ unsigned long worker_id =
+ (unsigned long) xbt_os_thread_get_specific(raw_worker_id_key);
+ XBT_DEBUG("Restoring worker stack %lu (working threads = %lu)",
+ worker_id, raw_threads_working);
next_stack = raw_workers_stacks[worker_id];
}
#endif
}
+/**
+ * \brief Resumes sequentially in the current worker thread the processes ready
+ * to run.
+ * \param first_process the first process to resume
+ */
static void smx_ctx_raw_resume_parallel(smx_process_t first_process)
{
#ifdef CONTEXT_THREADS
- unsigned long worker_id = xbt_parmap_get_worker_id(raw_parmap);
+ unsigned long worker_id = __sync_fetch_and_add(&raw_threads_working, 1);
+ xbt_os_thread_set_specific(raw_worker_id_key, (void*) worker_id);
+ XBT_DEBUG("Saving worker stack %lu", worker_id);
raw_stack_t* worker_stack = &raw_workers_stacks[worker_id];
smx_context_t context = first_process->context;
#endif
}
+/**
+ * \brief Resumes in parallel all processes ready to run.
+ */
static void smx_ctx_raw_runall_parallel(void)
{
#ifdef CONTEXT_THREADS
+ raw_threads_working = 0;
xbt_parmap_apply(raw_parmap, (void_f_pvoid_t) smx_ctx_raw_resume_parallel,
simix_global->process_to_run);
#endif
}
+/**
+ * \brief Resumes all processes ready to run.
+ */
static void smx_ctx_raw_runall(void)
{
unsigned long nb_processes = xbt_dynar_length(simix_global->process_to_run);
