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6490395: G1: Tidy up command line flags

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Change G1 flag names to be more consistent and disable some in 'product' mode.

Reviewed-by: tonyp, iveresov
This commit is contained in:
John Cuthbertson 2009-04-30 15:07:53 -07:00
parent 907a41e100
commit 55750920b4
11 changed files with 87 additions and 163 deletions
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15
hotspot/src/share/vm/gc_implementation/g1/concurrentMark.cpp
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@ -448,8 +448,8 @@ ConcurrentMark::ConcurrentMark(ReservedSpace rs,
gclog_or_tty->print_cr("[global] init, heap start = "PTR_FORMAT", "
"heap end = "PTR_FORMAT, _heap_start, _heap_end);
_markStack.allocate(G1CMStackSize);
_regionStack.allocate(G1CMRegionStackSize);
_markStack.allocate(G1MarkStackSize);
_regionStack.allocate(G1MarkRegionStackSize);
// Create & start a ConcurrentMark thread.
if (G1ConcMark) {
@ -499,20 +499,21 @@ ConcurrentMark::ConcurrentMark(ReservedSpace rs,
_marking_task_overhead = 1.0;
} else {
if (ParallelMarkingThreads > 0) {
// notice that ParallelMarkingThreads overwrites G1MarkingOverheadPerc
// notice that ParallelMarkingThreads overwrites G1MarkingOverheadPercent
// if both are set
_parallel_marking_threads = ParallelMarkingThreads;
_sleep_factor = 0.0;
_marking_task_overhead = 1.0;
} else if (G1MarkingOverheadPerc > 0) {
} else if (G1MarkingOverheadPercent > 0) {
// we will calculate the number of parallel marking threads
// based on a target overhead with respect to the soft real-time
// goal
double marking_overhead = (double) G1MarkingOverheadPerc / 100.0;
double marking_overhead = (double) G1MarkingOverheadPercent / 100.0;
double overall_cm_overhead =
(double) G1MaxPauseTimeMS * marking_overhead / (double) G1TimeSliceMS;
(double) MaxGCPauseMillis * marking_overhead /
(double) GCPauseIntervalMillis;
double cpu_ratio = 1.0 / (double) os::processor_count();
double marking_thread_num = ceil(overall_cm_overhead / cpu_ratio);
double marking_task_overhead =
@ -1747,7 +1748,7 @@ void ConcurrentMark::cleanup() {
g1h->increment_total_collections();
#ifndef PRODUCT
if (G1VerifyConcMark) {
if (VerifyDuringGC) {
G1CollectedHeap::heap()->prepare_for_verify();
G1CollectedHeap::heap()->verify(true,false);
}