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6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning

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6889757: G1: enable card mark elision for initializing writes from compiled code (ReduceInitialCardMarks)

Defer the (compiler-elided) card-mark upon a slow-path allocation until after the store  and before the next subsequent safepoint; G1 now answers yes to can_elide_tlab_write_barriers().

Reviewed-by: jcoomes, kvn, never
This commit is contained in:
Y. Srinivas Ramakrishna 2009-10-16 02:05:46 -07:00
parent a67426faf8
commit 928ac69fcd
13 changed files with 209 additions and 73 deletions
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8
hotspot/src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp
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@ -41,3 +41,11 @@ inline void ParallelScavengeHeap::invoke_full_gc(bool maximum_compaction)
PSMarkSweep::invoke(maximum_compaction);
}
}
inline bool ParallelScavengeHeap::is_in_young(oop p) {
return young_gen()->is_in_reserved(p);
}
inline bool ParallelScavengeHeap::is_in_old_or_perm(oop p) {
return old_gen()->is_in_reserved(p) || perm_gen()->is_in_reserved(p);
}