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8048085: Aborting marking just before remark results in useless additional clearing of the next mark bitmap

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Skip clearing the next bitmap if we just recently aborted since the full GC already clears this bitmap.

Reviewed-by: brutisso
This commit is contained in:
Thomas Schatzl 2014-07-21 09:59:46 +02:00
parent 1ad5cdb4a4
commit 2e37a94622
3 changed files with 14 additions and 2 deletions
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6
hotspot/src/share/vm/gc_implementation/g1/concurrentMarkThread.cpp
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@ -277,9 +277,13 @@ void ConcurrentMarkThread::run() {
// We now want to allow clearing of the marking bitmap to be
// suspended by a collection pause.
{
// We may have aborted just before the remark. Do not bother clearing the
// bitmap then, as it has been done during mark abort.
if (!cm()->has_aborted()) {
SuspendibleThreadSetJoiner sts;
_cm->clearNextBitmap();
} else {
assert(!G1VerifyBitmaps || _cm->nextMarkBitmapIsClear(), "Next mark bitmap must be clear");
}
}