start_gc_threads();
/* How many threads will be participating in this GC?
- * We don't try to parallelise minor GC.
+ * We don't try to parallelise minor GC, or mark/compact/sweep GC.
*/
#if defined(THREADED_RTS)
- if (n < (4*1024*1024 / BLOCK_SIZE)) {
+ if (n < (4*1024*1024 / BLOCK_SIZE) || oldest_gen->steps[0].mark) {
n_gc_threads = 1;
} else {
n_gc_threads = RtsFlags.ParFlags.gcThreads;
memInventory(traceClass(DEBUG_gc));
#endif
- // check stack sanity *before* GC (ToDo: check all threads)
+ // check stack sanity *before* GC
IF_DEBUG(sanity, checkFreeListSanity());
+ IF_DEBUG(sanity, checkMutableLists());
// Initialise all our gc_thread structures
for (t = 0; t < n_gc_threads; t++) {
// Update pointers from the Task list
update_task_list();
- // Update pointers from capabilities (probably just the spark queues)
- updateCapabilitiesPostGC();
-
// Now see which stable names are still alive.
gcStablePtrTable();
sweep(&oldest_gen->steps[0]);
}
- IF_DEBUG(sanity, checkGlobalTSOList(rtsFalse));
-
/* run through all the generations/steps and tidy up
*/
copied = 0;
// Update the stable pointer hash table.
updateStablePtrTable(major_gc);
+ // Remove useless sparks from the spark pools
+#ifdef THREADED_RTS
+ pruneSparkQueues();
+#endif
+
// check sanity after GC
IF_DEBUG(sanity, checkSanity());