5b42f3ce0d
Consistently use _g1h member names for cached G1CollectedHeap* variables. Reviewed-by: sangheki, sjohanss
64 lines
2.3 KiB
C++
64 lines
2.3 KiB
C++
/*
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* Copyright (c) 2016, 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_G1_G1HEAPSIZINGPOLICY_HPP
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#define SHARE_VM_GC_G1_G1HEAPSIZINGPOLICY_HPP
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#include "memory/allocation.hpp"
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class G1Analytics;
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class G1CollectedHeap;
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class G1HeapSizingPolicy: public CHeapObj<mtGC> {
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// MinOverThresholdForGrowth must be less than the number of recorded
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// pause times in G1Analytics, representing the minimum number of pause
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// time ratios that exceed GCTimeRatio before a heap expansion will be triggered.
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const static uint MinOverThresholdForGrowth = 4;
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const G1CollectedHeap* _g1h;
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const G1Analytics* _analytics;
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const uint _num_prev_pauses_for_heuristics;
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// Ratio check data for determining if heap growth is necessary.
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uint _ratio_over_threshold_count;
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double _ratio_over_threshold_sum;
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uint _pauses_since_start;
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protected:
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G1HeapSizingPolicy(const G1CollectedHeap* g1h, const G1Analytics* analytics);
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public:
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// If an expansion would be appropriate, because recent GC overhead had
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// exceeded the desired limit, return an amount to expand by.
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virtual size_t expansion_amount();
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// Clear ratio tracking data used by expansion_amount().
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void clear_ratio_check_data();
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static G1HeapSizingPolicy* create(const G1CollectedHeap* g1h, const G1Analytics* analytics);
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};
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#endif // SRC_SHARE_VM_GC_G1_G1HEAPSIZINGPOLICY_HPP
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