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8027959: Early reclamation of large objects in G1

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Try to reclaim humongous objects at every young collection after doing a conservative estimate of its liveness.

Reviewed-by: brutisso, mgerdin
This commit is contained in:
Thomas Schatzl 2014-07-23 09:03:32 +02:00
parent bc56e061ec
commit f161bd6d16
12 changed files with 537 additions and 32 deletions
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9
hotspot/src/share/vm/gc_implementation/g1/g1ParScanThreadState.inline.hpp
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@ -52,15 +52,20 @@ template <class T> void G1ParScanThreadState::do_oop_evac(T* p, HeapRegion* from
// set, due to (benign) races in the claim mechanism during RSet scanning more
// than one thread might claim the same card. So the same card may be
// processed multiple times. So redo this check.
if (_g1h->in_cset_fast_test(obj)) {
G1CollectedHeap::in_cset_state_t in_cset_state = _g1h->in_cset_state(obj);
if (in_cset_state == G1CollectedHeap::InCSet) {
oop forwardee;
if (obj->is_forwarded()) {
forwardee = obj->forwardee();
} else {
forwardee = copy_to_survivor_space(obj);
}
assert(forwardee != NULL, "forwardee should not be NULL");
oopDesc::encode_store_heap_oop(p, forwardee);
} else if (in_cset_state == G1CollectedHeap::IsHumongous) {
_g1h->set_humongous_is_live(obj);
} else {
assert(in_cset_state == G1CollectedHeap::InNeither,
err_msg("In_cset_state must be InNeither here, but is %d", in_cset_state));
}
assert(obj != NULL, "Must be");