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7023069: G1: Introduce symmetric locking in the slow allocation path

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7023151: G1: refactor the code that operates on _cur_alloc_region to be re-used for allocs by the GC threads
7018286: G1: humongous allocation attempts should take the GC locker into account

First, this change replaces the asymmetric locking scheme in the G1 slow alloc path by a summetric one. Second, it factors out the code that operates on _cur_alloc_region so that it can be re-used for allocations by the GC threads in the future.

Reviewed-by: stefank, brutisso, johnc
This commit is contained in:
Antonios Printezis 2011-03-30 10:26:59 -04:00
parent 349d820dd1
commit 3e9fe24ddd
11 changed files with 920 additions and 747 deletions
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5
hotspot/src/share/vm/memory/cardTableModRefBS.hpp
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@ -382,6 +382,11 @@ public:
return (addr_for(pcard) == p);
}
HeapWord* align_to_card_boundary(HeapWord* p) {
jbyte* pcard = byte_for(p + card_size_in_words - 1);
return addr_for(pcard);
}
// The kinds of precision a CardTableModRefBS may offer.
enum PrecisionStyle {
Precise,