Mercurial > hg > truffle
diff src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp @ 8094:f1fb03a251e9
8008546: Wrong G1ConfidencePercent results in GUARANTEE(VARIANCE() > -1.0) FAILED
Reviewed-by: brutisso, johnc
Contributed-by: vladimir.kempik@oracle.com
author | poonam |
---|---|
date | Thu, 21 Feb 2013 23:58:05 -0800 |
parents | 37f7535e5f18 |
children | 27714220e50e |
line wrap: on
line diff
--- a/src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp Fri Feb 15 13:27:21 2013 -0800 +++ b/src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp Thu Feb 21 23:58:05 2013 -0800 @@ -267,7 +267,15 @@ double max_gc_time = (double) MaxGCPauseMillis / 1000.0; double time_slice = (double) GCPauseIntervalMillis / 1000.0; _mmu_tracker = new G1MMUTrackerQueue(time_slice, max_gc_time); - _sigma = (double) G1ConfidencePercent / 100.0; + + uintx confidence_perc = G1ConfidencePercent; + // Put an artificial ceiling on this so that it's not set to a silly value. + if (confidence_perc > 100) { + confidence_perc = 100; + warning("G1ConfidencePercent is set to a value that is too large, " + "it's been updated to %u", confidence_perc); + } + _sigma = (double) confidence_perc / 100.0; // start conservatively (around 50ms is about right) _concurrent_mark_remark_times_ms->add(0.05);