author | coleenp |
Thu, 10 Jan 2019 15:13:51 -0500 | |
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parent 53116 | bb03098c4dde |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2018, 2019, 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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|
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#ifndef SHARE_GC_G1_G1HETEROGENEOUSHEAPYOUNGGENSIZER_HPP |
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#define SHARE_GC_G1_G1HETEROGENEOUSHEAPYOUNGGENSIZER_HPP |
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#include "gc/g1/g1YoungGenSizer.hpp" |
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// This class prevents the size of young generation of G1 heap to exceed dram |
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// memory available. If set on command line, MaxRAM and MaxRAMFraction/MaxRAMPercentage |
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// are used to determine the maximum size that young generation can grow. |
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// Else we set the maximum size to 80% of dram available in the system. |
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class G1HeterogeneousHeapYoungGenSizer : public G1YoungGenSizer { |
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private: |
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// maximum no of regions that young generation can grow to. Calculated in constructor. |
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uint _max_young_length; |
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void adjust_lengths_based_on_dram_memory(); |
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public: |
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G1HeterogeneousHeapYoungGenSizer(); |
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// Calculate the maximum length of the young gen given the number of regions |
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// depending on the sizing algorithm. |
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virtual void adjust_max_new_size(uint number_of_heap_regions); |
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virtual void heap_size_changed(uint new_number_of_heap_regions); |
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}; |
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#endif // SHARE_GC_G1_G1HETEROGENEOUSHEAPYOUNGGENSIZER_HPP |