jdk8-mips64-public/hotspot: src/share/vm/services/g1MemoryPool.hpp@a8a126788ea0 (annotated)

src/share/vm/services/g1MemoryPool.hpp@a8a126788ea0 (annotated)

src/share/vm/services/g1MemoryPool.hpp

Thu, 19 Jan 2012 09:13:58 -0500

author: tonyp
date: Thu, 19 Jan 2012 09:13:58 -0500
changeset 3459: a8a126788ea0
parent 3176: 8229bd737950
child 4153: b9a9ed0f8eeb
permissions: -rw-r--r--

7078465: G1: Don't use the undefined value (-1) for the G1 old memory pool max size
Reviewed-by: johnc, brutisso

 /*
  * Copyright (c) 2007, 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.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_SERVICES_G1MEMORYPOOL_HPP
 #define SHARE_VM_SERVICES_G1MEMORYPOOL_HPP
 #ifndef SERIALGC
 #include "gc_implementation/g1/g1MonitoringSupport.hpp"
 #include "services/memoryPool.hpp"
 #include "services/memoryUsage.hpp"
 #endif
 // This file contains the three classes that represent the memory
 // pools of the G1 spaces: G1EdenPool, G1SurvivorPool, and
 // G1OldGenPool. In G1, unlike our other GCs, we do not have a
 // physical space for each of those spaces. Instead, we allocate
 // regions for all three spaces out of a single pool of regions (that
 // pool basically covers the entire heap). As a result, the eden,
 // survivor, and old gen are considered logical spaces in G1, as each
 // is a set of non-contiguous regions. This is also reflected in the
 // way we map them to memory pools here. The easiest way to have done
 // this would have been to map the entire G1 heap to a single memory
 // pool. However, it's helpful to show how large the eden and survivor
 // get, as this does affect the performance and behavior of G1. Which
 // is why we introduce the three memory pools implemented here.
 //
 // See comments in g1MonitoringSupport.hpp for additional details
 // on this model.
 //
 // This class is shared by the three G1 memory pool classes
 // (G1EdenPool, G1SurvivorPool, G1OldGenPool).
 class G1MemoryPoolSuper : public CollectedMemoryPool {
 protected:
   const static size_t _undefined_max = (size_t) -1;
   G1MonitoringSupport* _g1mm;
   // Would only be called from subclasses.
   G1MemoryPoolSuper(G1CollectedHeap* g1h,
                     const char* name,
                     size_t init_size,
                     size_t max_size,
                     bool support_usage_threshold);
 };
 // Memory pool that represents the G1 eden.
 class G1EdenPool : public G1MemoryPoolSuper {
 public:
   G1EdenPool(G1CollectedHeap* g1h);
   size_t used_in_bytes() {
     return _g1mm->eden_space_used();
   }
   size_t max_size() const {
     return _undefined_max;
   }
   MemoryUsage get_memory_usage();
 };
 // Memory pool that represents the G1 survivor.
 class G1SurvivorPool : public G1MemoryPoolSuper {
 public:
   G1SurvivorPool(G1CollectedHeap* g1h);
   size_t used_in_bytes() {
     return _g1mm->survivor_space_used();
   }
   size_t max_size() const {
     return _undefined_max;
   }
   MemoryUsage get_memory_usage();
 };
 // Memory pool that represents the G1 old gen.
 class G1OldGenPool : public G1MemoryPoolSuper {
 public:
   G1OldGenPool(G1CollectedHeap* g1h);
   size_t used_in_bytes() {
     return _g1mm->old_space_used();
   }
   size_t max_size() const {
     return _g1mm->old_gen_max();
   }
   MemoryUsage get_memory_usage();
 };
 #endif // SHARE_VM_SERVICES_G1MEMORYPOOL_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/services/g1MemoryPool.hpp@a8a126788ea0 (annotated)

src/share/vm/services/g1MemoryPool.hpp