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8023021: Unnecessary clearing of the card table introduced by the fix for JDK-8023013

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Reviewed-by: stefank, ehelin
This commit is contained in:
Bengt Rutisson 2013-08-15 10:05:50 +02:00
parent dab6bdc071
commit c144b8c30f
4 changed files with 17 additions and 24 deletions
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10
hotspot/src/share/vm/memory/genMarkSweep.cpp
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@ -121,17 +121,15 @@ void GenMarkSweep::invoke_at_safepoint(int level, ReferenceProcessor* rp, bool c
all_empty = all_empty && gch->get_gen(i)->used() == 0;
}
GenRemSet* rs = gch->rem_set();
Generation* old_gen = gch->get_gen(level);
// Clear/invalidate below make use of the "prev_used_regions" saved earlier.
if (all_empty) {
// We've evacuated all generations below us.
Generation* g = gch->get_gen(level);
rs->clear_into_younger(g);
rs->clear_into_younger(old_gen);
} else {
// Invalidate the cards corresponding to the currently used
// region and clear those corresponding to the evacuated region
// of all generations just collected.
rs->invalidate_or_clear(gch->get_gen(1));
rs->invalidate_or_clear(gch->get_gen(0));
// region and clear those corresponding to the evacuated region.
rs->invalidate_or_clear(old_gen);
}
Threads::gc_epilogue();