#include "mono/sgen/sgen-client.h"
static int workers_num;
+static volatile gboolean forced_stop;
static WorkerData *workers_data;
static SgenSectionGrayQueue workers_distribute_gray_queue;
/*
* Allowed transitions:
*
- * | from \ to | NOT WORKING | WORKING | WORK ENQUEUED | NURSERY COLLECTION |
- * |--------------------+-------------+---------+---------------+--------------------|
- * | NOT WORKING | - | - | main | main |
- * | WORKING | worker | - | main | main |
- * | WORK ENQUEUED | - | worker | - | main |
- * | NURSERY COLLECTION | - | - | main | - |
+ * | from \ to | NOT WORKING | WORKING | WORK ENQUEUED |
+ * |--------------------+-------------+---------+---------------+
+ * | NOT WORKING | - | - | main |
+ * | WORKING | worker | - | main |
+ * | WORK ENQUEUED | - | worker | - |
*
* The WORK ENQUEUED state guarantees that the worker thread will inspect the queue again at
* least once. Only after looking at the queue will it go back to WORKING, and then,
enum {
STATE_NOT_WORKING,
STATE_WORKING,
- STATE_WORK_ENQUEUED,
- STATE_NURSERY_COLLECTION
+ STATE_WORK_ENQUEUED
};
typedef gint32 State;
return InterlockedCompareExchange (&workers_state, new_state, old_state) == old_state;
}
-static void
-assert_nursery_collection (State state)
-{
- SGEN_ASSERT (0, state == STATE_NURSERY_COLLECTION, "Must be in the nursery collection state");
-}
-
static gboolean
state_is_working_or_enqueued (State state)
{
return state == STATE_WORKING || state == STATE_WORK_ENQUEUED;
}
-static void
-workers_signal_enqueue_work (gboolean from_nursery_collection)
+void
+sgen_workers_ensure_awake (void)
{
State old_state;
gboolean did_set_state;
do {
old_state = workers_state;
- if (from_nursery_collection)
- assert_nursery_collection (old_state);
- else
- SGEN_ASSERT (0, old_state != STATE_NURSERY_COLLECTION, "If we're not in a nursery collection, how come the state is NURSERY COLLECTION?");
-
if (old_state == STATE_WORK_ENQUEUED)
break;
did_set_state = set_state (old_state, STATE_WORK_ENQUEUED);
- if (from_nursery_collection)
- SGEN_ASSERT (0, did_set_state, "Nobody else should be mutating the state");
} while (!did_set_state);
if (!state_is_working_or_enqueued (old_state))
sgen_thread_pool_idle_signal ();
}
-void
-sgen_workers_ensure_awake (void)
-{
- SGEN_ASSERT (0, workers_state != STATE_NURSERY_COLLECTION, "Can't wake workers during nursery collection");
- workers_signal_enqueue_work (FALSE);
-}
-
static void
worker_try_finish (void)
{
old_state = workers_state;
SGEN_ASSERT (0, old_state != STATE_NOT_WORKING, "How did we get from doing idle work to NOT WORKING without setting it ourselves?");
- if (old_state == STATE_NURSERY_COLLECTION)
- return;
if (old_state == STATE_WORK_ENQUEUED)
return;
SGEN_ASSERT (0, old_state == STATE_WORKING, "What other possibility is there?");
/* We are the last thread to go to sleep. */
} while (!set_state (old_state, STATE_NOT_WORKING));
-}
-static gboolean
-collection_needs_workers (void)
-{
- return sgen_collection_is_concurrent ();
+ binary_protocol_worker_finish (sgen_timestamp (), forced_stop);
}
void
-sgen_workers_enqueue_job (SgenThreadPoolJob *job)
+sgen_workers_enqueue_job (SgenThreadPoolJob *job, gboolean enqueue)
{
- if (!collection_needs_workers ()) {
+ if (!enqueue) {
job->func (NULL, job);
sgen_thread_pool_job_free (job);
return;
sgen_workers_ensure_awake ();
}
-void
-sgen_workers_signal_start_nursery_collection_and_wait (void)
-{
- State old_state;
-
- do {
- old_state = workers_state;
-
- if (old_state != STATE_NOT_WORKING)
- SGEN_ASSERT (0, old_state != STATE_NURSERY_COLLECTION, "Why are we transitioning to NURSERY COLLECTION when we're already there?");
- } while (!set_state (old_state, STATE_NURSERY_COLLECTION));
-
- sgen_thread_pool_idle_wait ();
-
- assert_nursery_collection (workers_state);
-}
-
-void
-sgen_workers_signal_finish_nursery_collection (void)
-{
- assert_nursery_collection (workers_state);
- workers_signal_enqueue_work (TRUE);
-}
-
static gboolean
workers_get_work (WorkerData *data)
{
}
static void
-concurrent_enqueue_check (char *obj)
+concurrent_enqueue_check (GCObject *obj)
{
g_assert (sgen_concurrent_collection_in_progress ());
g_assert (!sgen_ptr_in_nursery (obj));
static void
thread_pool_init_func (void *data_untyped)
{
- WorkerData *data = data_untyped;
+ WorkerData *data = (WorkerData *)data_untyped;
SgenMajorCollector *major = sgen_get_major_collector ();
sgen_client_thread_register_worker ();
static void
marker_idle_func (void *data_untyped)
{
- WorkerData *data = data_untyped;
-
- if (!continue_idle_func ())
- return;
+ WorkerData *data = (WorkerData *)data_untyped;
+ SGEN_ASSERT (0, continue_idle_func (), "Why are we called when we're not supposed to work?");
SGEN_ASSERT (0, sgen_concurrent_collection_in_progress (), "The worker should only mark in concurrent collections.");
- SGEN_ASSERT (0, sgen_get_current_collection_generation () != GENERATION_NURSERY, "Why are we doing work while there's a nursery collection happening?");
if (workers_state == STATE_WORK_ENQUEUED) {
set_state (STATE_WORK_ENQUEUED, STATE_WORKING);
SGEN_ASSERT (0, workers_state != STATE_NOT_WORKING, "How did we get from WORK ENQUEUED to NOT WORKING?");
}
- if (!sgen_gray_object_queue_is_empty (&data->private_gray_queue) || workers_get_work (data)) {
+ if (!forced_stop && (!sgen_gray_object_queue_is_empty (&data->private_gray_queue) || workers_get_work (data))) {
ScanCopyContext ctx = CONTEXT_FROM_OBJECT_OPERATIONS (idle_func_object_ops, &data->private_gray_queue);
SGEN_ASSERT (0, !sgen_gray_object_queue_is_empty (&data->private_gray_queue), "How is our gray queue empty if we just got work?");
- sgen_drain_gray_stack (32, ctx);
+ sgen_drain_gray_stack (ctx);
} else {
worker_try_finish ();
}
void
sgen_workers_init_distribute_gray_queue (void)
{
- SGEN_ASSERT (0, sgen_get_major_collector ()->is_concurrent && collection_needs_workers (),
+ SGEN_ASSERT (0, sgen_get_major_collector ()->is_concurrent,
"Why should we init the distribute gray queue if we don't need it?");
init_distribute_gray_queue ();
}
sgen_workers_init (int num_workers)
{
int i;
- void *workers_data_ptrs [num_workers];
+ void **workers_data_ptrs = (void **)alloca(num_workers * sizeof(void *));
if (!sgen_get_major_collector ()->is_concurrent) {
sgen_thread_pool_init (num_workers, thread_pool_init_func, NULL, NULL, NULL);
workers_num = num_workers;
- workers_data = sgen_alloc_internal_dynamic (sizeof (WorkerData) * num_workers, INTERNAL_MEM_WORKER_DATA, TRUE);
+ workers_data = (WorkerData *)sgen_alloc_internal_dynamic (sizeof (WorkerData) * num_workers, INTERNAL_MEM_WORKER_DATA, TRUE);
memset (workers_data, 0, sizeof (WorkerData) * num_workers);
init_distribute_gray_queue ();
for (i = 0; i < workers_num; ++i)
- workers_data_ptrs [i] = &workers_data [i];
+ workers_data_ptrs [i] = (void *) &workers_data [i];
sgen_thread_pool_init (num_workers, thread_pool_init_func, marker_idle_func, continue_idle_func, workers_data_ptrs);
}
void
-sgen_workers_start_all_workers (SgenObjectOperations *object_ops)
+sgen_workers_stop_all_workers (void)
{
- if (!collection_needs_workers ())
- return;
+ forced_stop = TRUE;
+ sgen_thread_pool_wait_for_all_jobs ();
+ sgen_thread_pool_idle_wait ();
+ SGEN_ASSERT (0, workers_state == STATE_NOT_WORKING, "Can only signal enqueue work when in no work state");
+}
+
+void
+sgen_workers_start_all_workers (SgenObjectOperations *object_ops)
+{
+ forced_stop = FALSE;
idle_func_object_ops = object_ops;
mono_memory_write_barrier ();
- workers_signal_enqueue_work (FALSE);
+ sgen_workers_ensure_awake ();
}
void
{
int i;
- SGEN_ASSERT (0, workers_state != STATE_NURSERY_COLLECTION, "Can't be in nursery collection when joining");
-
- if (!collection_needs_workers ())
- return;
-
sgen_thread_pool_wait_for_all_jobs ();
sgen_thread_pool_idle_wait ();
SGEN_ASSERT (0, workers_state == STATE_NOT_WORKING, "Can only signal enqueue work when in no work state");
SGEN_ASSERT (0, sgen_gray_object_queue_is_empty (&workers_data [i].private_gray_queue), "Why is there still work left to do?");
}
+/*
+ * Can only be called if the workers are stopped.
+ * If we're stopped, there are also no pending jobs.
+ */
+gboolean
+sgen_workers_have_idle_work (void)
+{
+ int i;
+
+ SGEN_ASSERT (0, forced_stop && sgen_workers_all_done (), "Checking for idle work should only happen if the workers are stopped.");
+
+ if (!sgen_section_gray_queue_is_empty (&workers_distribute_gray_queue))
+ return TRUE;
+
+ for (i = 0; i < workers_num; ++i) {
+ if (!sgen_gray_object_queue_is_empty (&workers_data [i].private_gray_queue))
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
gboolean
sgen_workers_all_done (void)
{
return state_is_working_or_enqueued (workers_state);
}
-void
-sgen_workers_wait (void)
-{
- sgen_thread_pool_idle_wait ();
- SGEN_ASSERT (0, sgen_workers_all_done (), "Why are the workers not done after we wait for them?");
-}
-
SgenSectionGrayQueue*
sgen_workers_get_distribute_section_gray_queue (void)
{
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