jdk-sandbox: src/hotspot/share/gc/g1/collectionSetChooser.hpp@24341625d8f2 (annotated)

1374 4c24294029a9 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1	/*
53244 9807daeb47c4 8216167: Update include guards to reflect correct directories coleenp parents: 49607 diff changeset	2	* Copyright (c) 2001, 2019, Oracle and/or its affiliates. All rights reserved.
1374 4c24294029a9 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5547 f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 2105 diff changeset	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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1374 4c24294029a9 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	22	*
4c24294029a9 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	23	*/
4c24294029a9 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	24
53244 9807daeb47c4 8216167: Update include guards to reflect correct directories coleenp parents: 49607 diff changeset	25	#ifndef SHARE_GC_G1_COLLECTIONSETCHOOSER_HPP
9807daeb47c4 8216167: Update include guards to reflect correct directories coleenp parents: 49607 diff changeset	26	#define SHARE_GC_G1_COLLECTIONSETCHOOSER_HPP
7397 5b173b4ca846 6989984: Use standard include model for Hospot stefank parents: 5547 diff changeset	27
30764 fec48bf5a827 8079792: GC directory structure cleanup pliden parents: 26846 diff changeset	28	#include "gc/g1/heapRegion.hpp"
53703 24341625d8f2 8217330: Split G1CollectionSetChooser into collection set candidate container and the chooser algorithm tschatzl parents: 53244 diff changeset	29	#include "memory/allocation.hpp"
24341625d8f2 8217330: Split G1CollectionSetChooser into collection set candidate container and the chooser algorithm tschatzl parents: 53244 diff changeset	30	#include "runtime/globals.hpp"
12382 6aaecb1cbfe1 7145441: G1: collection set chooser-related cleanup tonyp parents: 12381 diff changeset	31
53703 24341625d8f2 8217330: Split G1CollectionSetChooser into collection set candidate container and the chooser algorithm tschatzl parents: 53244 diff changeset	32	class G1CollectionSetCandidates;
24341625d8f2 8217330: Split G1CollectionSetChooser into collection set candidate container and the chooser algorithm tschatzl parents: 53244 diff changeset	33	class WorkGang;
11756 28b6fe22e43d 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 10680 diff changeset	34
53703 24341625d8f2 8217330: Split G1CollectionSetChooser into collection set candidate container and the chooser algorithm tschatzl parents: 53244 diff changeset	35	// Helper class to calculate collection set candidates, and containing some related
24341625d8f2 8217330: Split G1CollectionSetChooser into collection set candidate container and the chooser algorithm tschatzl parents: 53244 diff changeset	36	// methods.
24341625d8f2 8217330: Split G1CollectionSetChooser into collection set candidate container and the chooser algorithm tschatzl parents: 53244 diff changeset	37	class CollectionSetChooser : public AllStatic {
24341625d8f2 8217330: Split G1CollectionSetChooser into collection set candidate container and the chooser algorithm tschatzl parents: 53244 diff changeset	38	static uint calculate_work_chunk_size(uint num_workers, uint num_regions);
1374 4c24294029a9 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	39	public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	40
49605 784f3f2dea14 8197570: Make rules for choosing collection set candidates more explicit tschatzl parents: 47216 diff changeset	41	static size_t mixed_gc_live_threshold_bytes() {
784f3f2dea14 8197570: Make rules for choosing collection set candidates more explicit tschatzl parents: 47216 diff changeset	42	return HeapRegion::GrainBytes * (size_t) G1MixedGCLiveThresholdPercent / 100;
784f3f2dea14 8197570: Make rules for choosing collection set candidates more explicit tschatzl parents: 47216 diff changeset	43	}
784f3f2dea14 8197570: Make rules for choosing collection set candidates more explicit tschatzl parents: 47216 diff changeset	44
53703 24341625d8f2 8217330: Split G1CollectionSetChooser into collection set candidate container and the chooser algorithm tschatzl parents: 53244 diff changeset	45	static bool region_occupancy_low_enough_for_evac(size_t live_bytes) {
24341625d8f2 8217330: Split G1CollectionSetChooser into collection set candidate container and the chooser algorithm tschatzl parents: 53244 diff changeset	46	return live_bytes < mixed_gc_live_threshold_bytes();
24341625d8f2 8217330: Split G1CollectionSetChooser into collection set candidate container and the chooser algorithm tschatzl parents: 53244 diff changeset	47	}
49605 784f3f2dea14 8197570: Make rules for choosing collection set candidates more explicit tschatzl parents: 47216 diff changeset	48
53703 24341625d8f2 8217330: Split G1CollectionSetChooser into collection set candidate container and the chooser algorithm tschatzl parents: 53244 diff changeset	49	// Determine whether to add the given region to the collection set candidates or
31346 a70d45c06136 8042668: GC Support for shared heap ranges in CDS jiangli parents: 30874 diff changeset	50	// not. Currently, we skip pinned regions and regions whose live
a70d45c06136 8042668: GC Support for shared heap ranges in CDS jiangli parents: 30874 diff changeset	51	// bytes are over the threshold. Humongous regions may be reclaimed during cleanup.
49607 acffe6ff3ae7 8180415: Rebuild remembered sets during the concurrent cycle tschatzl parents: 49605 diff changeset	52	// Regions also need a complete remembered set to be a candidate.
53703 24341625d8f2 8217330: Split G1CollectionSetChooser into collection set candidate container and the chooser algorithm tschatzl parents: 53244 diff changeset	53	static bool should_add(HeapRegion* hr);
1374 4c24294029a9 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	54
53703 24341625d8f2 8217330: Split G1CollectionSetChooser into collection set candidate container and the chooser algorithm tschatzl parents: 53244 diff changeset	55	// Build and return set of collection set candidates sorted by decreasing gc
24341625d8f2 8217330: Split G1CollectionSetChooser into collection set candidate container and the chooser algorithm tschatzl parents: 53244 diff changeset	56	// efficiency.
24341625d8f2 8217330: Split G1CollectionSetChooser into collection set candidate container and the chooser algorithm tschatzl parents: 53244 diff changeset	57	static G1CollectionSetCandidates* build(WorkGang* workers, uint max_num_regions);
13336 e582172ff6ff 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 13195 diff changeset	58	};
e582172ff6ff 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 13195 diff changeset	59
53244 9807daeb47c4 8216167: Update include guards to reflect correct directories coleenp parents: 49607 diff changeset	60	#endif // SHARE_GC_G1_COLLECTIONSETCHOOSER_HPP

author	tschatzl
	Fri, 08 Feb 2019 12:55:20 +0100
changeset 53703	24341625d8f2
parent 53244	9807daeb47c4
permissions	-rw-r--r--