initMutex(&cap->lock);
cap->running_task = NULL; // indicates cap is free
cap->spare_workers = NULL;
+ cap->n_spare_workers = 0;
cap->suspended_ccalls = NULL;
cap->returning_tasks_hd = NULL;
cap->returning_tasks_tl = NULL;
cap->inbox = (Message*)END_TSO_QUEUE;
cap->sparks_created = 0;
+ cap->sparks_dud = 0;
cap->sparks_converted = 0;
- cap->sparks_pruned = 0;
+ cap->sparks_gcd = 0;
+ cap->sparks_fizzled = 0;
#endif
cap->f.stgEagerBlackholeInfo = (W_)&__stg_EAGER_BLACKHOLE_info;
cap->transaction_tokens = 0;
cap->context_switch = 0;
cap->pinned_object_block = NULL;
+
+ traceCapsetAssignCap(CAPSET_OSPROCESS_DEFAULT, i);
}
/* ---------------------------------------------------------------------------
void
initCapabilities( void )
{
+ /* Declare a single capability set representing the process.
+ Each capability will get added to this capset. */
+ traceCapsetCreate(CAPSET_OSPROCESS_DEFAULT, CapsetTypeOsProcess);
+
#if defined(THREADED_RTS)
nat i;
task = cap->running_task;
+ // If the Task is stopped, we shouldn't be yielding, we should
+ // be just exiting.
+ ASSERT(!task->stopped);
+
// If the current task is a worker, save it on the spare_workers
// list of this Capability. A worker can mark itself as stopped,
// in which case it is not replaced on the spare_worker queue.
// This happens when the system is shutting down (see
// Schedule.c:workerStart()).
- if (!isBoundTask(task) && !task->stopped) {
- task->next = cap->spare_workers;
- cap->spare_workers = task;
+ if (!isBoundTask(task))
+ {
+ if (cap->n_spare_workers < MAX_SPARE_WORKERS)
+ {
+ task->next = cap->spare_workers;
+ cap->spare_workers = task;
+ cap->n_spare_workers++;
+ }
+ else
+ {
+ debugTrace(DEBUG_sched, "%d spare workers already, exiting",
+ cap->n_spare_workers);
+ releaseCapability_(cap,rtsFalse);
+ // hold the lock until after workerTaskStop; c.f. scheduleWorker()
+ workerTaskStop(task);
+ RELEASE_LOCK(&cap->lock);
+ shutdownThread();
+ }
}
// Bound tasks just float around attached to their TSOs.
}
cap->spare_workers = task->next;
task->next = NULL;
- }
+ cap->n_spare_workers--;
+ }
cap->running_task = task;
RELEASE_LOCK(&cap->lock);
break;
}
/* ----------------------------------------------------------------------------
+ * tryGrabCapability
+ *
+ * Attempt to gain control of a Capability if it is free.
+ *
+ * ------------------------------------------------------------------------- */
+
+rtsBool
+tryGrabCapability (Capability *cap, Task *task)
+{
+ if (cap->running_task != NULL) return rtsFalse;
+ ACQUIRE_LOCK(&cap->lock);
+ if (cap->running_task != NULL) {
+ RELEASE_LOCK(&cap->lock);
+ return rtsFalse;
+ }
+ task->cap = cap;
+ cap->running_task = task;
+ RELEASE_LOCK(&cap->lock);
+ return rtsTrue;
+}
+
+
+#endif /* THREADED_RTS */
+
+/* ----------------------------------------------------------------------------
* shutdownCapability
*
* At shutdown time, we want to let everything exit as cleanly as
* ------------------------------------------------------------------------- */
void
-shutdownCapability (Capability *cap, Task *task, rtsBool safe)
+shutdownCapability (Capability *cap,
+ Task *task USED_IF_THREADS,
+ rtsBool safe USED_IF_THREADS)
{
+#if defined(THREADED_RTS)
nat i;
task->cap = cap;
if (!osThreadIsAlive(t->id)) {
debugTrace(DEBUG_sched,
"worker thread %p has died unexpectedly", (void *)t->id);
- if (!prev) {
- cap->spare_workers = t->next;
- } else {
- prev->next = t->next;
- }
- prev = t;
+ cap->n_spare_workers--;
+ if (!prev) {
+ cap->spare_workers = t->next;
+ } else {
+ prev->next = t->next;
+ }
+ prev = t;
}
}
}
// threads performing foreign calls that will eventually try to
// return via resumeThread() and attempt to grab cap->lock.
// closeMutex(&cap->lock);
-}
+
+#endif /* THREADED_RTS */
-/* ----------------------------------------------------------------------------
- * tryGrabCapability
- *
- * Attempt to gain control of a Capability if it is free.
- *
- * ------------------------------------------------------------------------- */
+ traceCapsetRemoveCap(CAPSET_OSPROCESS_DEFAULT, cap->no);
+}
-rtsBool
-tryGrabCapability (Capability *cap, Task *task)
+void
+shutdownCapabilities(Task *task, rtsBool safe)
{
- if (cap->running_task != NULL) return rtsFalse;
- ACQUIRE_LOCK(&cap->lock);
- if (cap->running_task != NULL) {
- RELEASE_LOCK(&cap->lock);
- return rtsFalse;
+ nat i;
+ for (i=0; i < n_capabilities; i++) {
+ ASSERT(task->incall->tso == NULL);
+ shutdownCapability(&capabilities[i], task, safe);
}
- task->cap = cap;
- cap->running_task = task;
- RELEASE_LOCK(&cap->lock);
- return rtsTrue;
+ traceCapsetDelete(CAPSET_OSPROCESS_DEFAULT);
}
-
-#endif /* THREADED_RTS */
-
static void
freeCapability (Capability *cap)
{
------------------------------------------------------------------------ */
void
-markSomeCapabilities (evac_fn evac, void *user, nat i0, nat delta,
- rtsBool no_mark_sparks USED_IF_THREADS)
+markCapability (evac_fn evac, void *user, Capability *cap,
+ rtsBool no_mark_sparks USED_IF_THREADS)
{
- nat i;
- Capability *cap;
InCall *incall;
// Each GC thread is responsible for following roots from the
// or fewer Capabilities as GC threads, but just in case there
// are more, we mark every Capability whose number is the GC
// thread's index plus a multiple of the number of GC threads.
- for (i = i0; i < n_capabilities; i += delta) {
- cap = &capabilities[i];
- evac(user, (StgClosure **)(void *)&cap->run_queue_hd);
- evac(user, (StgClosure **)(void *)&cap->run_queue_tl);
+ evac(user, (StgClosure **)(void *)&cap->run_queue_hd);
+ evac(user, (StgClosure **)(void *)&cap->run_queue_tl);
#if defined(THREADED_RTS)
- evac(user, (StgClosure **)(void *)&cap->inbox);
+ evac(user, (StgClosure **)(void *)&cap->inbox);
#endif
- for (incall = cap->suspended_ccalls; incall != NULL;
- incall=incall->next) {
- evac(user, (StgClosure **)(void *)&incall->suspended_tso);
- }
+ for (incall = cap->suspended_ccalls; incall != NULL;
+ incall=incall->next) {
+ evac(user, (StgClosure **)(void *)&incall->suspended_tso);
+ }
#if defined(THREADED_RTS)
- if (!no_mark_sparks) {
- traverseSparkQueue (evac, user, cap);
- }
-#endif
+ if (!no_mark_sparks) {
+ traverseSparkQueue (evac, user, cap);
}
+#endif
-#if !defined(THREADED_RTS)
- evac(user, (StgClosure **)(void *)&blocked_queue_hd);
- evac(user, (StgClosure **)(void *)&blocked_queue_tl);
- evac(user, (StgClosure **)(void *)&sleeping_queue);
-#endif
+ // Free STM structures for this Capability
+ stmPreGCHook(cap);
}
void
markCapabilities (evac_fn evac, void *user)
{
- markSomeCapabilities(evac, user, 0, 1, rtsFalse);
+ nat n;
+ for (n = 0; n < n_capabilities; n++) {
+ markCapability(evac, user, &capabilities[n], rtsFalse);
+ }
}
-
-/* -----------------------------------------------------------------------------
- Messages
- -------------------------------------------------------------------------- */
-
projects / ghc-hetmet.git / blobdiff