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8022800: Use specific generations rather than generation iteration

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Reviewed-by: jmasa, ehelin
This commit is contained in:
Bengt Rutisson 2013-08-14 09:02:32 +02:00
parent 7cea3820af
commit 19ba466575
8 changed files with 41 additions and 80 deletions
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15
hotspot/src/share/vm/memory/genMarkSweep.cpp
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@ -52,8 +52,8 @@
#include "utilities/copy.hpp"
#include "utilities/events.hpp"
void GenMarkSweep::invoke_at_safepoint(int level, ReferenceProcessor* rp,
bool clear_all_softrefs) {
void GenMarkSweep::invoke_at_safepoint(int level, ReferenceProcessor* rp, bool clear_all_softrefs) {
guarantee(level == 1, "We always collect both old and young.");
assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint");
GenCollectedHeap* gch = GenCollectedHeap::heap();
@ -84,11 +84,6 @@ void GenMarkSweep::invoke_at_safepoint(int level, ReferenceProcessor* rp,
// Capture heap size before collection for printing.
size_t gch_prev_used = gch->used();
// Some of the card table updates below assume that the perm gen is
// also being collected.
assert(level == gch->n_gens() - 1,
"All generations are being collected, ergo perm gen too.");
// Capture used regions for each generation that will be
// subject to collection, so that card table adjustments can
// be made intelligently (see clear / invalidate further below).
@ -134,9 +129,9 @@ void GenMarkSweep::invoke_at_safepoint(int level, ReferenceProcessor* rp,
} else {
// Invalidate the cards corresponding to the currently used
// region and clear those corresponding to the evacuated region
// of all generations just collected (i.e. level and younger).
rs->invalidate_or_clear(gch->get_gen(level),
true /* younger */);
// of all generations just collected.
rs->invalidate_or_clear(gch->get_gen(1));
rs->invalidate_or_clear(gch->get_gen(0));
}
Threads::gc_epilogue();