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comparison src/share/vm/gc_implementation/g1/concurrentMark.cpp @ 751:20c6f43950b5

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6490395: G1: Tidy up command line flags. Summary: Change G1 flag names to be more consistent and disable some in 'product' mode. Reviewed-by: tonyp, iveresov
author johnc
date Thu, 30 Apr 2009 15:07:53 -0700
parents bd441136a5ce
children 830ca2573896
comparison
equal deleted inserted replaced
748:51285b431bb2 751:20c6f43950b5
446 446
447 if (verbose_low()) 447 if (verbose_low())
448 gclog_or_tty->print_cr("[global] init, heap start = "PTR_FORMAT", " 448 gclog_or_tty->print_cr("[global] init, heap start = "PTR_FORMAT", "
449 "heap end = "PTR_FORMAT, _heap_start, _heap_end); 449 "heap end = "PTR_FORMAT, _heap_start, _heap_end);
450 450
451 _markStack.allocate(G1CMStackSize); 451 _markStack.allocate(G1MarkStackSize);
452 _regionStack.allocate(G1CMRegionStackSize); 452 _regionStack.allocate(G1MarkRegionStackSize);
453 453
454 // Create & start a ConcurrentMark thread. 454 // Create & start a ConcurrentMark thread.
455 if (G1ConcMark) { 455 if (G1ConcMark) {
456 _cmThread = new ConcurrentMarkThread(this); 456 _cmThread = new ConcurrentMarkThread(this);
457 assert(cmThread() != NULL, "CM Thread should have been created"); 457 assert(cmThread() != NULL, "CM Thread should have been created");
497 _parallel_marking_threads = 0; 497 _parallel_marking_threads = 0;
498 _sleep_factor = 0.0; 498 _sleep_factor = 0.0;
499 _marking_task_overhead = 1.0; 499 _marking_task_overhead = 1.0;
500 } else { 500 } else {
501 if (ParallelMarkingThreads > 0) { 501 if (ParallelMarkingThreads > 0) {
502 // notice that ParallelMarkingThreads overwrites G1MarkingOverheadPerc 502 // notice that ParallelMarkingThreads overwrites G1MarkingOverheadPercent
503 // if both are set 503 // if both are set
504 504
505 _parallel_marking_threads = ParallelMarkingThreads; 505 _parallel_marking_threads = ParallelMarkingThreads;
506 _sleep_factor = 0.0; 506 _sleep_factor = 0.0;
507 _marking_task_overhead = 1.0; 507 _marking_task_overhead = 1.0;
508 } else if (G1MarkingOverheadPerc > 0) { 508 } else if (G1MarkingOverheadPercent > 0) {
509 // we will calculate the number of parallel marking threads 509 // we will calculate the number of parallel marking threads
510 // based on a target overhead with respect to the soft real-time 510 // based on a target overhead with respect to the soft real-time
511 // goal 511 // goal
512 512
513 double marking_overhead = (double) G1MarkingOverheadPerc / 100.0; 513 double marking_overhead = (double) G1MarkingOverheadPercent / 100.0;
514 double overall_cm_overhead = 514 double overall_cm_overhead =
515 (double) G1MaxPauseTimeMS * marking_overhead / (double) G1TimeSliceMS; 515 (double) MaxGCPauseMillis * marking_overhead /
516 (double) GCPauseIntervalMillis;
516 double cpu_ratio = 1.0 / (double) os::processor_count(); 517 double cpu_ratio = 1.0 / (double) os::processor_count();
517 double marking_thread_num = ceil(overall_cm_overhead / cpu_ratio); 518 double marking_thread_num = ceil(overall_cm_overhead / cpu_ratio);
518 double marking_task_overhead = 519 double marking_task_overhead =
519 overall_cm_overhead / marking_thread_num * 520 overall_cm_overhead / marking_thread_num *
520 (double) os::processor_count(); 521 (double) os::processor_count();
1745 // We need to make this be a "collection" so any collection pause that 1746 // We need to make this be a "collection" so any collection pause that
1746 // races with it goes around and waits for completeCleanup to finish. 1747 // races with it goes around and waits for completeCleanup to finish.
1747 g1h->increment_total_collections(); 1748 g1h->increment_total_collections();
1748 1749
1749 #ifndef PRODUCT 1750 #ifndef PRODUCT
1750 if (G1VerifyConcMark) { 1751 if (VerifyDuringGC) {
1751 G1CollectedHeap::heap()->prepare_for_verify(); 1752 G1CollectedHeap::heap()->prepare_for_verify();
1752 G1CollectedHeap::heap()->verify(true,false); 1753 G1CollectedHeap::heap()->verify(true,false);
1753 } 1754 }
1754 #endif 1755 #endif
1755 } 1756 }