jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/parallelScavenge/psPermGen.hpp@4dfb2df418f2

6484982: G1: process references during evacuation pauses
Summary: G1 now uses two reference processors - one is used by concurrent marking and the other is used by STW GCs (both full and incremental evacuation pauses). In an evacuation pause, the reference processor is embedded into the closures used to scan objects. Doing so causes causes reference objects to be 'discovered' by the reference processor. At the end of the evacuation pause, these discovered reference objects are processed - preserving (and copying) referent objects (and their reachable graphs) as appropriate.
Reviewed-by: ysr, jwilhelm, brutisso, stefank, tonyp

     1 /*

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     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

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    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

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    25 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSPERMGEN_HPP

    26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSPERMGEN_HPP

    28 #include "gc_implementation/parallelScavenge/psOldGen.hpp"

    30 class AdaptivePaddedAverage;

    32 class PSPermGen : public PSOldGen {

    33   friend class VMStructs;

    34  protected:

    35   AdaptivePaddedAverage* _avg_size;  // Used for sizing

    36   size_t _last_used;                 // Amount used at last GC, used for sizing

    38  public:

    39   // Initialize the generation.

    40   PSPermGen(ReservedSpace rs, size_t alignment, size_t initial_byte_size,

    41             size_t minimum_byte_size, size_t maximum_byte_size,

    42             const char* gen_name, int level);

    44   // Permanent Gen special allocation. Uses the OldGen allocation

    45   // routines, which should not be directly called on this generation.

    46   HeapWord* allocate_permanent(size_t word_size);

    48   // Size calculation.

    49   void compute_new_size(size_t used_before_collection);

    51   // MarkSweep code

    52   virtual void precompact();

    54   virtual const char* name() const { return "PSPermGen"; }

    55 };

    57 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSPERMGEN_HPP

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

src/share/vm/gc_implementation/parallelScavenge/psPermGen.hpp@4dfb2df418f2

src/share/vm/gc_implementation/parallelScavenge/psPermGen.hpp