tonyp@1524: /*
mikael@4153:  * Copyright (c) 2007, 2012, Oracle and/or its affiliates. All rights reserved.
tonyp@1524:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
tonyp@1524:  *
tonyp@1524:  * This code is free software; you can redistribute it and/or modify it
tonyp@1524:  * under the terms of the GNU General Public License version 2 only, as
tonyp@1524:  * published by the Free Software Foundation.
tonyp@1524:  *
tonyp@1524:  * This code is distributed in the hope that it will be useful, but WITHOUT
tonyp@1524:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
tonyp@1524:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
tonyp@1524:  * version 2 for more details (a copy is included in the LICENSE file that
tonyp@1524:  * accompanied this code).
tonyp@1524:  *
tonyp@1524:  * You should have received a copy of the GNU General Public License version
tonyp@1524:  * 2 along with this work; if not, write to the Free Software Foundation,
tonyp@1524:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
tonyp@1524:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
tonyp@1524:  *
tonyp@1524:  */
tonyp@1524: 
stefank@2314: #ifndef SHARE_VM_SERVICES_G1MEMORYPOOL_HPP
stefank@2314: #define SHARE_VM_SERVICES_G1MEMORYPOOL_HPP
stefank@2314: 
jprovino@4542: #include "utilities/macros.hpp"
jprovino@4542: #if INCLUDE_ALL_GCS
tonyp@3176: #include "gc_implementation/g1/g1MonitoringSupport.hpp"
stefank@2314: #include "services/memoryPool.hpp"
stefank@2314: #include "services/memoryUsage.hpp"
jprovino@4542: #endif // INCLUDE_ALL_GCS
stefank@2314: 
tonyp@1524: // This file contains the three classes that represent the memory
tonyp@1524: // pools of the G1 spaces: G1EdenPool, G1SurvivorPool, and
tonyp@1524: // G1OldGenPool. In G1, unlike our other GCs, we do not have a
tonyp@1524: // physical space for each of those spaces. Instead, we allocate
tonyp@1524: // regions for all three spaces out of a single pool of regions (that
tonyp@1524: // pool basically covers the entire heap). As a result, the eden,
tonyp@1524: // survivor, and old gen are considered logical spaces in G1, as each
tonyp@1524: // is a set of non-contiguous regions. This is also reflected in the
tonyp@1524: // way we map them to memory pools here. The easiest way to have done
tonyp@1524: // this would have been to map the entire G1 heap to a single memory
tonyp@1524: // pool. However, it's helpful to show how large the eden and survivor
tonyp@1524: // get, as this does affect the performance and behavior of G1. Which
tonyp@1524: // is why we introduce the three memory pools implemented here.
tonyp@1524: //
jmasa@2821: // See comments in g1MonitoringSupport.hpp for additional details
jmasa@2821: // on this model.
tonyp@1524: //
tonyp@1524: 
tonyp@1524: // This class is shared by the three G1 memory pool classes
tonyp@3176: // (G1EdenPool, G1SurvivorPool, G1OldGenPool).
tonyp@1524: class G1MemoryPoolSuper : public CollectedMemoryPool {
tonyp@1524: protected:
tonyp@3176:   const static size_t _undefined_max = (size_t) -1;
tonyp@3176:   G1MonitoringSupport* _g1mm;
tonyp@1528: 
tonyp@1524:   // Would only be called from subclasses.
tonyp@1524:   G1MemoryPoolSuper(G1CollectedHeap* g1h,
tonyp@1524:                     const char* name,
tonyp@1524:                     size_t init_size,
tonyp@3176:                     size_t max_size,
tonyp@1524:                     bool support_usage_threshold);
tonyp@1524: };
tonyp@1524: 
tonyp@1524: // Memory pool that represents the G1 eden.
tonyp@1524: class G1EdenPool : public G1MemoryPoolSuper {
tonyp@1524: public:
tonyp@1524:   G1EdenPool(G1CollectedHeap* g1h);
tonyp@1524: 
tonyp@1524:   size_t used_in_bytes() {
tonyp@3176:     return _g1mm->eden_space_used();
tonyp@1524:   }
tonyp@1528:   size_t max_size() const {
tonyp@3176:     return _undefined_max;
tonyp@1524:   }
tonyp@1524:   MemoryUsage get_memory_usage();
tonyp@1524: };
tonyp@1524: 
tonyp@1524: // Memory pool that represents the G1 survivor.
tonyp@1524: class G1SurvivorPool : public G1MemoryPoolSuper {
tonyp@1524: public:
tonyp@1524:   G1SurvivorPool(G1CollectedHeap* g1h);
tonyp@1524: 
tonyp@1524:   size_t used_in_bytes() {
tonyp@3176:     return _g1mm->survivor_space_used();
tonyp@1524:   }
tonyp@1528:   size_t max_size() const {
tonyp@3176:     return _undefined_max;
tonyp@1524:   }
tonyp@1524:   MemoryUsage get_memory_usage();
tonyp@1524: };
tonyp@1524: 
tonyp@1524: // Memory pool that represents the G1 old gen.
tonyp@1524: class G1OldGenPool : public G1MemoryPoolSuper {
tonyp@1524: public:
tonyp@1524:   G1OldGenPool(G1CollectedHeap* g1h);
tonyp@1524: 
tonyp@1524:   size_t used_in_bytes() {
tonyp@3176:     return _g1mm->old_space_used();
tonyp@1524:   }
tonyp@1528:   size_t max_size() const {
tonyp@3459:     return _g1mm->old_gen_max();
tonyp@1524:   }
tonyp@1524:   MemoryUsage get_memory_usage();
tonyp@1524: };
stefank@2314: 
stefank@2314: #endif // SHARE_VM_SERVICES_G1MEMORYPOOL_HPP