jdk-sandbox: src/hotspot/share/gc/g1/g1HeterogeneousHeapYoungGenSizer.hpp@9b67dd88a931 (annotated)

53116 bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	1	/*
53244 9807daeb47c4 8216167: Update include guards to reflect correct directories coleenp parents: 53116 diff changeset	2	* Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
53116 bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	4	*
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	5	* This code is free software; you can redistribute it and/or modify it
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	6	* under the terms of the GNU General Public License version 2 only, as
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	7	* published by the Free Software Foundation.
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	8	*
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	9	* This code is distributed in the hope that it will be useful, but WITHOUT
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	13	* accompanied this code).
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	14	*
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bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	20	* or visit www.oracle.com if you need additional information or have any
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	21	* questions.
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	22	*
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	23	*/
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	24
53244 9807daeb47c4 8216167: Update include guards to reflect correct directories coleenp parents: 53116 diff changeset	25	#ifndef SHARE_GC_G1_G1HETEROGENEOUSHEAPYOUNGGENSIZER_HPP
9807daeb47c4 8216167: Update include guards to reflect correct directories coleenp parents: 53116 diff changeset	26	#define SHARE_GC_G1_G1HETEROGENEOUSHEAPYOUNGGENSIZER_HPP
53116 bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	27
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	28	#include "gc/g1/g1YoungGenSizer.hpp"
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	29
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	30	// This class prevents the size of young generation of G1 heap to exceed dram
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	31	// memory available. If set on command line, MaxRAM and MaxRAMFraction/MaxRAMPercentage
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	32	// are used to determine the maximum size that young generation can grow.
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	33	// Else we set the maximum size to 80% of dram available in the system.
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	34
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	35	class G1HeterogeneousHeapYoungGenSizer : public G1YoungGenSizer {
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	36	private:
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	37	// maximum no of regions that young generation can grow to. Calculated in constructor.
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	38	uint _max_young_length;
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	39	void adjust_lengths_based_on_dram_memory();
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	40
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	41	public:
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	42	G1HeterogeneousHeapYoungGenSizer();
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	43
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	44	// Calculate the maximum length of the young gen given the number of regions
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	45	// depending on the sizing algorithm.
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	46	virtual void adjust_max_new_size(uint number_of_heap_regions);
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	47
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	48	virtual void heap_size_changed(uint new_number_of_heap_regions);
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	49	};
bb03098c4dde 8211425: Allocation of old generation of java heap on alternate memory devices - G1 GC sangheki parents: diff changeset	50
53244 9807daeb47c4 8216167: Update include guards to reflect correct directories coleenp parents: 53116 diff changeset	51	#endif // SHARE_GC_G1_G1HETEROGENEOUSHEAPYOUNGGENSIZER_HPP

author	manc
	Mon, 14 Oct 2019 18:48:10 -0700
changeset 58652	9b67dd88a931
parent 53244	9807daeb47c4
permissions	-rw-r--r--