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8152438: Threads may do significant work out of the non-shared overflow buffer

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Before processing an element in the non-shared overflow buffer, try to push it into the local shared buffer to keep it full.

Reviewed-by: jmasa, ehelin, sjohanss
This commit is contained in:
Thomas Schatzl 2016-06-22 10:34:01 +02:00
parent 161976b05f
commit 423717c156
3 changed files with 11 additions and 2 deletions
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4
hotspot/src/share/vm/gc/g1/g1ParScanThreadState.cpp
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@ -137,7 +137,9 @@ void G1ParScanThreadState::trim_queue() {
do {
// Drain the overflow stack first, so other threads can steal.
while (_refs->pop_overflow(ref)) {
dispatch_reference(ref);
if (!_refs->try_push_to_taskqueue(ref)) {
dispatch_reference(ref);
}
}
while (_refs->pop_local(ref)) {