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6672698: mangle_unused_area() should not remangle the entire heap at each collection

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Maintain a high water mark for the allocations in a space and mangle only up to that high water mark.

Reviewed-by: ysr, apetrusenko
This commit is contained in:
Jon Masamitsu 2008-07-09 15:08:55 -07:00
parent 0d9452401c
commit 18dbebd143
43 changed files with 1299 additions and 206 deletions
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13
hotspot/src/share/vm/gc_implementation/shared/mutableNUMASpace.hpp
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@ -171,14 +171,21 @@ class MutableNUMASpace : public MutableSpace {
MutableNUMASpace();
virtual ~MutableNUMASpace();
// Space initialization.
virtual void initialize(MemRegion mr, bool clear_space);
virtual void initialize(MemRegion mr, bool clear_space, bool mangle_space);
// Update space layout if necessary. Do all adaptive resizing job.
virtual void update();
// Update allocation rate averages.
virtual void accumulate_statistics();
virtual void clear();
virtual void mangle_unused_area();
virtual void clear(bool mangle_space);
virtual void mangle_unused_area() PRODUCT_RETURN;
virtual void mangle_unused_area_complete() PRODUCT_RETURN;
virtual void mangle_region(MemRegion mr) PRODUCT_RETURN;
virtual void check_mangled_unused_area(HeapWord* limit) PRODUCT_RETURN;
virtual void check_mangled_unused_area_complete() PRODUCT_RETURN;
virtual void set_top_for_allocations(HeapWord* v) PRODUCT_RETURN;
virtual void set_top_for_allocations() PRODUCT_RETURN;
virtual void ensure_parsability();
virtual size_t used_in_words() const;
virtual size_t free_in_words() const;