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- Moved the computation of old space limits to after the mandatory scavenge.

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This reduces the number of mark sweep operations.

Review URL: http://codereview.chromium.org/661175

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3969 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
bak@chromium.org 2010-02-26 11:48:18 +00:00
parent def4980625
commit 0adf83b10d
1 changed files with 10 additions and 2 deletions
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12
src/heap.cc
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@ -562,9 +562,18 @@ void Heap::PerformGarbageCollection(AllocationSpace space,
global_gc_prologue_callback_();
}
EnsureFromSpaceIsCommitted();
// Perform mark-sweep with optional compaction.
if (collector == MARK_COMPACTOR) {
MarkCompact(tracer);
}
// Always perform a scavenge to make room in new space.
Scavenge();
// Update the old space promotion limits after the scavenge due to
// promotions during scavenge.
if (collector == MARK_COMPACTOR) {
int old_gen_size = PromotedSpaceSize();
old_gen_promotion_limit_ =
old_gen_size + Max(kMinimumPromotionLimit, old_gen_size / 3);
@ -572,7 +581,6 @@ void Heap::PerformGarbageCollection(AllocationSpace space,
old_gen_size + Max(kMinimumAllocationLimit, old_gen_size / 2);
old_gen_exhausted_ = false;
}
Scavenge();
Counters::objs_since_last_young.Set(0);
@ -1673,7 +1681,7 @@ Object* Heap::InitializeNumberStringCache() {
// max_semispace_size_ == 8 MB => number_string_cache_size = 16KB.
int number_string_cache_size = max_semispace_size_ / 512;
number_string_cache_size = Max(32, Min(16*KB, number_string_cache_size));
Object* obj = AllocateFixedArray(number_string_cache_size * 2);
Object* obj = AllocateFixedArray(number_string_cache_size * 2, TENURED);
if (!obj->IsFailure()) set_number_string_cache(FixedArray::cast(obj));
return obj;
}