aoqi@0: /*
aoqi@0:  * Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #ifndef SHARE_VM_SERVICES_G1MEMORYPOOL_HPP
aoqi@0: #define SHARE_VM_SERVICES_G1MEMORYPOOL_HPP
aoqi@0: 
aoqi@0: #include "utilities/macros.hpp"
aoqi@0: #if INCLUDE_ALL_GCS
aoqi@0: #include "gc_implementation/g1/g1MonitoringSupport.hpp"
aoqi@0: #include "services/memoryPool.hpp"
aoqi@0: #include "services/memoryUsage.hpp"
aoqi@0: #endif // INCLUDE_ALL_GCS
aoqi@0: 
aoqi@0: // This file contains the three classes that represent the memory
aoqi@0: // pools of the G1 spaces: G1EdenPool, G1SurvivorPool, and
aoqi@0: // G1OldGenPool. In G1, unlike our other GCs, we do not have a
aoqi@0: // physical space for each of those spaces. Instead, we allocate
aoqi@0: // regions for all three spaces out of a single pool of regions (that
aoqi@0: // pool basically covers the entire heap). As a result, the eden,
aoqi@0: // survivor, and old gen are considered logical spaces in G1, as each
aoqi@0: // is a set of non-contiguous regions. This is also reflected in the
aoqi@0: // way we map them to memory pools here. The easiest way to have done
aoqi@0: // this would have been to map the entire G1 heap to a single memory
aoqi@0: // pool. However, it's helpful to show how large the eden and survivor
aoqi@0: // get, as this does affect the performance and behavior of G1. Which
aoqi@0: // is why we introduce the three memory pools implemented here.
aoqi@0: //
aoqi@0: // See comments in g1MonitoringSupport.hpp for additional details
aoqi@0: // on this model.
aoqi@0: //
aoqi@0: 
aoqi@0: // This class is shared by the three G1 memory pool classes
aoqi@0: // (G1EdenPool, G1SurvivorPool, G1OldGenPool).
aoqi@0: class G1MemoryPoolSuper : public CollectedMemoryPool {
aoqi@0: protected:
aoqi@0:   const static size_t _undefined_max = (size_t) -1;
aoqi@0:   G1MonitoringSupport* _g1mm;
aoqi@0: 
aoqi@0:   // Would only be called from subclasses.
aoqi@0:   G1MemoryPoolSuper(G1CollectedHeap* g1h,
aoqi@0:                     const char* name,
aoqi@0:                     size_t init_size,
aoqi@0:                     size_t max_size,
aoqi@0:                     bool support_usage_threshold);
aoqi@0: };
aoqi@0: 
aoqi@0: // Memory pool that represents the G1 eden.
aoqi@0: class G1EdenPool : public G1MemoryPoolSuper {
aoqi@0: public:
aoqi@0:   G1EdenPool(G1CollectedHeap* g1h);
aoqi@0: 
aoqi@0:   size_t used_in_bytes() {
aoqi@0:     return _g1mm->eden_space_used();
aoqi@0:   }
aoqi@0:   size_t max_size() const {
aoqi@0:     return _undefined_max;
aoqi@0:   }
aoqi@0:   MemoryUsage get_memory_usage();
aoqi@0: };
aoqi@0: 
aoqi@0: // Memory pool that represents the G1 survivor.
aoqi@0: class G1SurvivorPool : public G1MemoryPoolSuper {
aoqi@0: public:
aoqi@0:   G1SurvivorPool(G1CollectedHeap* g1h);
aoqi@0: 
aoqi@0:   size_t used_in_bytes() {
aoqi@0:     return _g1mm->survivor_space_used();
aoqi@0:   }
aoqi@0:   size_t max_size() const {
aoqi@0:     return _undefined_max;
aoqi@0:   }
aoqi@0:   MemoryUsage get_memory_usage();
aoqi@0: };
aoqi@0: 
aoqi@0: // Memory pool that represents the G1 old gen.
aoqi@0: class G1OldGenPool : public G1MemoryPoolSuper {
aoqi@0: public:
aoqi@0:   G1OldGenPool(G1CollectedHeap* g1h);
aoqi@0: 
aoqi@0:   size_t used_in_bytes() {
aoqi@0:     return _g1mm->old_space_used();
aoqi@0:   }
aoqi@0:   size_t max_size() const {
aoqi@0:     return _g1mm->old_gen_max();
aoqi@0:   }
aoqi@0:   MemoryUsage get_memory_usage();
aoqi@0: };
aoqi@0: 
aoqi@0: #endif // SHARE_VM_SERVICES_G1MEMORYPOOL_HPP