author | zgu |
Thu, 28 Jun 2012 17:03:16 -0400 | |
changeset 13195 | be27e1b6a4b9 |
parent 7397 | 5b173b4ca846 |
child 13963 | e5b53c306fb5 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_GSPACECOUNTERS_HPP |
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#define SHARE_VM_GC_IMPLEMENTATION_SHARED_GSPACECOUNTERS_HPP |
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#ifndef SERIALGC |
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#include "gc_implementation/shared/generationCounters.hpp" |
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#include "memory/generation.hpp" |
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#include "runtime/perfData.hpp" |
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#endif |
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// A GSpaceCounter is a holder class for performance counters |
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// that track a space; |
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class GSpaceCounters: public CHeapObj<mtGC> { |
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friend class VMStructs; |
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private: |
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PerfVariable* _capacity; |
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PerfVariable* _used; |
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// Constant PerfData types don't need to retain a reference. |
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// However, it's a good idea to document them here. |
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// PerfConstant* _size; |
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Generation* _gen; |
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char* _name_space; |
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public: |
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GSpaceCounters(const char* name, int ordinal, size_t max_size, Generation* g, |
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GenerationCounters* gc, bool sampled=true); |
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~GSpaceCounters() { |
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if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space, mtGC); |
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} |
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inline void update_capacity() { |
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_capacity->set_value(_gen->capacity()); |
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} |
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inline void update_used() { |
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_used->set_value(_gen->used()); |
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} |
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// special version of update_used() to allow the used value to be |
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// passed as a parameter. This method can can be used in cases were |
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// the utilization is already known and/or when the _gen->used() |
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// method is known to be expensive and we want to avoid unnecessary |
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// calls to it. |
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// |
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inline void update_used(size_t used) { |
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_used->set_value(used); |
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} |
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inline void inc_used(size_t size) { |
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_used->inc(size); |
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} |
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debug_only( |
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// for security reasons, we do not allow arbitrary reads from |
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// the counters as they may live in shared memory. |
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jlong used() { |
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return _used->get_value(); |
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} |
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jlong capacity() { |
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return _used->get_value(); |
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} |
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) |
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inline void update_all() { |
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update_used(); |
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update_capacity(); |
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} |
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const char* name_space() const { return _name_space; } |
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}; |
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class GenerationUsedHelper : public PerfLongSampleHelper { |
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private: |
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Generation* _gen; |
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public: |
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GenerationUsedHelper(Generation* g) : _gen(g) { } |
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inline jlong take_sample() { |
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return _gen->used(); |
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} |
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}; |
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#endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_GSPACECOUNTERS_HPP |