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7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field

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Initialize the _is_alive_non_header field of G1's reference processor with an instance of the G1CMIsAliveClosure. This will stop adding reference objects with live referents to the discovered reference lists unnecessarily.

Reviewed-by: tonyp, ysr, jwilhelm, brutisso
This commit is contained in:
John Cuthbertson 2010-12-17 11:26:53 -08:00
parent 771994b0dc
commit b2fa4708ad
4 changed files with 42 additions and 28 deletions
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4
hotspot/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp
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@ -1768,6 +1768,7 @@ G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) :
_g1_policy(policy_),
_dirty_card_queue_set(false),
_into_cset_dirty_card_queue_set(false),
_is_alive_closure(this),
_ref_processor(NULL),
_process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)),
_bot_shared(NULL),
@ -2061,7 +2062,8 @@ void G1CollectedHeap::ref_processing_init() {
mr, // span
false, // Reference discovery is not atomic
true, // mt_discovery
NULL, // is alive closure: need to fill this in for efficiency
&_is_alive_closure, // is alive closure
// for efficiency
ParallelGCThreads,
ParallelRefProcEnabled,
true); // Setting next fields of discovered