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6937160: G1: should observe GCTimeRatio

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Remove the G1GCPercent parameter, that specifies the desired GC overhead percentage in G1, and observe the GCTimeRatio parameter instead.

Reviewed-by: jmasa, johnc
This commit is contained in:
Antonios Printezis 2010-03-30 15:36:55 -04:00
parent 3eab898282
commit 972acdab81
4 changed files with 21 additions and 5 deletions
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10
hotspot/src/share/vm/runtime/arguments.cpp
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@ -1353,6 +1353,16 @@ void Arguments::set_g1_gc_flags() {
MarkStackSize / K, MarkStackSizeMax / K);
tty->print_cr("ConcGCThreads: %u", ConcGCThreads);
}
if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) {
// In G1, we want the default GC overhead goal to be higher than
// say in PS. So we set it here to 10%. Otherwise the heap might
// be expanded more aggressively than we would like it to. In
// fact, even 10% seems to not be high enough in some cases
// (especially small GC stress tests that the main thing they do
// is allocation). We might consider increase it further.
FLAG_SET_DEFAULT(GCTimeRatio, 9);
}
}
void Arguments::set_heap_size() {