/* ticks left before next pre-emptive context switch */
static int ticks_to_ctxt_switch = 0;
+#if defined(RTS_SUPPORTS_THREADS)
+/* idle ticks left before we perform a GC */
+static int ticks_to_gc = 0;
+#endif
+
/*
* Function: handle_tick()
*
#if defined(RTS_SUPPORTS_THREADS)
/*
- * If we've been inactive for a whole time slice, tell the
- * scheduler to wake up and do a GC, to check for threads
- * that are deadlocked.
+ * If we've been inactive for idleGCDelayTicks (set by +RTS
+ * -I), tell the scheduler to wake up and do a GC, to check
+ * for threads that are deadlocked.
*/
switch (recent_activity) {
case ACTIVITY_YES:
recent_activity = ACTIVITY_MAYBE_NO;
+ ticks_to_gc = RtsFlags.GcFlags.idleGCDelayTicks;
break;
case ACTIVITY_MAYBE_NO:
- recent_activity = ACTIVITY_INACTIVE;
- blackholes_need_checking = rtsTrue;
- /* hack: re-use the blackholes_need_checking flag */
- threadRunnable();
- /* ToDo: this threadRunnable only works if there's
- * another thread (not this one) waiting to be woken up
- */
+ if (ticks_to_gc == 0) break; /* 0 ==> no idle GC */
+ ticks_to_gc--;
+ if (ticks_to_gc == 0) {
+ ticks_to_gc = RtsFlags.GcFlags.idleGCDelayTicks;
+ recent_activity = ACTIVITY_INACTIVE;
+ blackholes_need_checking = rtsTrue;
+ /* hack: re-use the blackholes_need_checking flag */
+ threadRunnable();
+ /* ToDo: this threadRunnable only works if there's
+ * another thread (not this one) waiting to be woken up
+ */
+ }
break;
default:
break;