jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/heapRegionSets.hpp@0fa27f37d4d4 (annotated)

src/share/vm/gc_implementation/g1/heapRegionSets.hpp@0fa27f37d4d4 (annotated)

src/share/vm/gc_implementation/g1/heapRegionSets.hpp

Wed, 19 Jan 2011 19:30:42 -0500

author: tonyp
date: Wed, 19 Jan 2011 19:30:42 -0500
changeset 2472: 0fa27f37d4d4
child 2962: ae5b2f1dcf12
permissions: -rw-r--r--

6977804: G1: remove the zero-filling thread
Summary: This changeset removes the zero-filling thread from G1 and collapses the two free region lists we had before (the "free" and "unclean" lists) into one. The new free list uses the new heap region sets / lists abstractions that we'll ultimately use it to keep track of all regions in the heap. A heap region set was also introduced for the humongous regions. Finally, this change increases the concurrency between the thread that completes freeing regions (after a cleanup pause) and the rest of the system (before we'd have to wait for said thread to complete before allocating a new region). The changest also includes a lot of refactoring and code simplification.
Reviewed-by: jcoomes, johnc

 /*
  * copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
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 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONSETS_HPP
 #define SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONSETS_HPP
 #include "gc_implementation/g1/heapRegionSet.inline.hpp"
 //////////////////// FreeRegionList ////////////////////
 class FreeRegionList : public HeapRegionLinkedList {
 protected:
   virtual const char* verify_region_extra(HeapRegion* hr);
   virtual bool regions_humongous() { return false; }
   virtual bool regions_empty()     { return true;  }
 public:
   FreeRegionList(const char* name) : HeapRegionLinkedList(name) { }
 };
 //////////////////// MasterFreeRegionList ////////////////////
 class MasterFreeRegionList : public FreeRegionList {
 protected:
   virtual bool check_mt_safety();
 public:
   MasterFreeRegionList(const char* name) : FreeRegionList(name) { }
 };
 //////////////////// SecondaryFreeRegionList ////////////////////
 class SecondaryFreeRegionList : public FreeRegionList {
 protected:
   virtual bool check_mt_safety();
 public:
   SecondaryFreeRegionList(const char* name) : FreeRegionList(name) { }
 };
 //////////////////// HumongousRegionSet ////////////////////
 class HumongousRegionSet : public HeapRegionSet {
 protected:
   virtual const char* verify_region_extra(HeapRegion* hr);
   virtual bool regions_humongous() { return true;  }
   virtual bool regions_empty()     { return false; }
 public:
   HumongousRegionSet(const char* name) : HeapRegionSet(name) { }
 };
 //////////////////// MasterHumongousRegionSet ////////////////////
 class MasterHumongousRegionSet : public HumongousRegionSet {
 protected:
   virtual bool check_mt_safety();
 public:
   MasterHumongousRegionSet(const char* name) : HumongousRegionSet(name) { }
 };
 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONSETS_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/g1/heapRegionSets.hpp@0fa27f37d4d4 (annotated)

src/share/vm/gc_implementation/g1/heapRegionSets.hpp