Mercurial > jdk8-mips64-public > hotspot / file diff

     1.1 --- a/src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp	Thu Mar 12 18:17:25 2009 -0700
     1.2 +++ b/src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp	Wed Mar 18 11:37:48 2009 -0400
     1.3 @@ -172,7 +172,6 @@
     1.4      NumAPIs = HeapRegion::MaxAge
     1.5    };
     1.6  
     1.7 -
     1.8    // The one and only G1CollectedHeap, so static functions can find it.
     1.9    static G1CollectedHeap* _g1h;
    1.10  
    1.11 @@ -217,11 +216,20 @@
    1.12  
    1.13    // Postcondition: cur_alloc_region == NULL.
    1.14    void abandon_cur_alloc_region();
    1.15 +  void abandon_gc_alloc_regions();
    1.16  
    1.17    // The to-space memory regions into which objects are being copied during
    1.18    // a GC.
    1.19    HeapRegion* _gc_alloc_regions[GCAllocPurposeCount];
    1.20    size_t _gc_alloc_region_counts[GCAllocPurposeCount];
    1.21 +  // These are the regions, one per GCAllocPurpose, that are half-full
    1.22 +  // at the end of a collection and that we want to reuse during the
    1.23 +  // next collection.
    1.24 +  HeapRegion* _retained_gc_alloc_regions[GCAllocPurposeCount];
    1.25 +  // This specifies whether we will keep the last half-full region at
    1.26 +  // the end of a collection so that it can be reused during the next
    1.27 +  // collection (this is specified per GCAllocPurpose)
    1.28 +  bool _retain_gc_alloc_region[GCAllocPurposeCount];
    1.29  
    1.30    // A list of the regions that have been set to be alloc regions in the
    1.31    // current collection.
    1.32 @@ -589,8 +597,21 @@
    1.33  
    1.34    // Ensure that the relevant gc_alloc regions are set.
    1.35    void get_gc_alloc_regions();
    1.36 -  // We're done with GC alloc regions; release them, as appropriate.
    1.37 -  void release_gc_alloc_regions();
    1.38 +  // We're done with GC alloc regions. We are going to tear down the
    1.39 +  // gc alloc list and remove the gc alloc tag from all the regions on
    1.40 +  // that list. However, we will also retain the last (i.e., the one
    1.41 +  // that is half-full) GC alloc region, per GCAllocPurpose, for
    1.42 +  // possible reuse during the next collection, provided
    1.43 +  // _retain_gc_alloc_region[] indicates that it should be the
    1.44 +  // case. Said regions are kept in the _retained_gc_alloc_regions[]
    1.45 +  // array. If the parameter totally is set, we will not retain any
    1.46 +  // regions, irrespective of what _retain_gc_alloc_region[]
    1.47 +  // indicates.
    1.48 +  void release_gc_alloc_regions(bool totally);
    1.49 +#ifndef PRODUCT
    1.50 +  // Useful for debugging.
    1.51 +  void print_gc_alloc_regions();
    1.52 +#endif // !PRODUCT
    1.53  
    1.54    // ("Weak") Reference processing support
    1.55    ReferenceProcessor* _ref_processor;