--- a/hotspot/src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp Wed Jul 05 17:09:16 2017 +0200
+++ b/hotspot/src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp Tue Mar 30 15:36:55 2010 -0400
@@ -198,7 +198,9 @@
_recorded_survivor_regions(0),
_recorded_survivor_head(NULL),
_recorded_survivor_tail(NULL),
- _survivors_age_table(true)
+ _survivors_age_table(true),
+
+ _gc_overhead_perc(0.0)
{
// Set up the region size and associated fields. Given that the
@@ -275,6 +277,11 @@
// calculate_young_list_target_config during initialization
_max_survivor_regions = G1FixedSurvivorSpaceSize / HeapRegion::GrainBytes;
+ assert(GCTimeRatio > 0,
+ "we should have set it to a default value set_g1_gc_flags() "
+ "if a user set it to 0");
+ _gc_overhead_perc = 100.0 * (1.0 / (1.0 + GCTimeRatio));
+
initialize_all();
}
@@ -2288,7 +2295,7 @@
}
size_t G1CollectorPolicy::expansion_amount() {
- if ((int)(recent_avg_pause_time_ratio() * 100.0) > G1GCPercent) {
+ if ((recent_avg_pause_time_ratio() * 100.0) > _gc_overhead_perc) {
// We will double the existing space, or take
// G1ExpandByPercentOfAvailable % of the available expansion
// space, whichever is smaller, bounded below by a minimum