truffle: src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp annotate

annotate src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp @ 20481:c02ec279b062

8057768: Make heap region region type in G1 HeapRegion explicit Reviewed-by: brutisso, tschatzl

author	brutisso
date	Tue, 16 Sep 2014 14:27:40 +0200
parents	cfd4aac53239
children	b840813adfcc

rev	line source
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1 /*
10098 71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	7 * published by the Free Software Foundation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	8 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	13 * accompanied this code).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	14 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1394 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1394 diff changeset	20 * or visit www.oracle.com if you need additional information or have any
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1394 diff changeset	21 * questions.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	22 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	23 */
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	24
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1707 diff changeset	25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTORPOLICY_HPP
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1707 diff changeset	26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTORPOLICY_HPP
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1707 diff changeset	27
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1707 diff changeset	28 #include "gc_implementation/g1/collectionSetChooser.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1707 diff changeset	29 #include "gc_implementation/g1/g1MMUTracker.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1707 diff changeset	30 #include "memory/collectorPolicy.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1707 diff changeset	31
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	32 // A G1CollectorPolicy makes policy decisions that determine the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	33 // characteristics of the collector. Examples include:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	34 // * choice of collection set.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	35 // * when to collect.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	36
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	37 class HeapRegion;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	38 class CollectionSetChooser;
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	39 class G1GCPhaseTimes;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	40
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	41 // TraceGen0Time collects data on _both_ young and mixed evacuation pauses
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	42 // (the latter may contain non-young regions - i.e. regions that are
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	43 // technically in Gen1) while TraceGen1Time collects data about full GCs.
6197 d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 6109 diff changeset	44 class TraceGen0TimeData : public CHeapObj<mtGC> {
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	45 private:
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	46 unsigned _young_pause_num;
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	47 unsigned _mixed_pause_num;
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	48
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	49 NumberSeq _all_stop_world_times_ms;
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	50 NumberSeq _all_yield_times_ms;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	51
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	52 NumberSeq _total;
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	53 NumberSeq _other;
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	54 NumberSeq _root_region_scan_wait;
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	55 NumberSeq _parallel;
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	56 NumberSeq _ext_root_scan;
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	57 NumberSeq _satb_filtering;
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	58 NumberSeq _update_rs;
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	59 NumberSeq _scan_rs;
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	60 NumberSeq _obj_copy;
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	61 NumberSeq _termination;
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	62 NumberSeq _parallel_other;
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	63 NumberSeq _clear_ct;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	64
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	65 void print_summary(const char* str, const NumberSeq* seq) const;
922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	66 void print_summary_sd(const char* str, const NumberSeq* seq) const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	67
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	68 public:
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	69 TraceGen0TimeData() : _young_pause_num(0), _mixed_pause_num(0) {};
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	70 void record_start_collection(double time_to_stop_the_world_ms);
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	71 void record_yield_time(double yield_time_ms);
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	72 void record_end_collection(double pause_time_ms, G1GCPhaseTimes* phase_times);
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	73 void increment_young_collection_count();
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	74 void increment_mixed_collection_count();
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	75 void print() const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	76 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	77
6197 d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 6109 diff changeset	78 class TraceGen1TimeData : public CHeapObj<mtGC> {
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	79 private:
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	80 NumberSeq _all_full_gc_times;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	81
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	82 public:
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	83 void record_full_collection(double full_gc_time_ms);
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	84 void print() const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	85 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	86
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	87 // There are three command line options related to the young gen size:
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	88 // NewSize, MaxNewSize and NewRatio (There is also -Xmn, but that is
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	89 // just a short form for NewSize==MaxNewSize). G1 will use its internal
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	90 // heuristics to calculate the actual young gen size, so these options
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	91 // basically only limit the range within which G1 can pick a young gen
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	92 // size. Also, these are general options taking byte sizes. G1 will
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	93 // internally work with a number of regions instead. So, some rounding
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	94 // will occur.
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	95 //
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	96 // If nothing related to the the young gen size is set on the command
7449 37f7535e5f18 8001424: G1: Rename certain G1-specific flags johnc parents: 6818 diff changeset	97 // line we should allow the young gen to be between G1NewSizePercent
37f7535e5f18 8001424: G1: Rename certain G1-specific flags johnc parents: 6818 diff changeset	98 // and G1MaxNewSizePercent of the heap size. This means that every time
37f7535e5f18 8001424: G1: Rename certain G1-specific flags johnc parents: 6818 diff changeset	99 // the heap size changes, the limits for the young gen size will be
37f7535e5f18 8001424: G1: Rename certain G1-specific flags johnc parents: 6818 diff changeset	100 // recalculated.
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	101 //
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	102 // If only -XX:NewSize is set we should use the specified value as the
7449 37f7535e5f18 8001424: G1: Rename certain G1-specific flags johnc parents: 6818 diff changeset	103 // minimum size for young gen. Still using G1MaxNewSizePercent of the
37f7535e5f18 8001424: G1: Rename certain G1-specific flags johnc parents: 6818 diff changeset	104 // heap as maximum.
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	105 //
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	106 // If only -XX:MaxNewSize is set we should use the specified value as the
7449 37f7535e5f18 8001424: G1: Rename certain G1-specific flags johnc parents: 6818 diff changeset	107 // maximum size for young gen. Still using G1NewSizePercent of the heap
37f7535e5f18 8001424: G1: Rename certain G1-specific flags johnc parents: 6818 diff changeset	108 // as minimum.
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	109 //
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	110 // If -XX:NewSize and -XX:MaxNewSize are both specified we use these values.
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	111 // No updates when the heap size changes. There is a special case when
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	112 // NewSize==MaxNewSize. This is interpreted as "fixed" and will use a
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	113 // different heuristic for calculating the collection set when we do mixed
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	114 // collection.
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	115 //
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	116 // If only -XX:NewRatio is set we should use the specified ratio of the heap
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	117 // as both min and max. This will be interpreted as "fixed" just like the
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	118 // NewSize==MaxNewSize case above. But we will update the min and max
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	119 // everytime the heap size changes.
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	120 //
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	121 // NewSize and MaxNewSize override NewRatio. So, NewRatio is ignored if it is
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	122 // combined with either NewSize or MaxNewSize. (A warning message is printed.)
6197 d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 6109 diff changeset	123 class G1YoungGenSizer : public CHeapObj<mtGC> {
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	124 private:
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	125 enum SizerKind {
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	126 SizerDefaults,
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	127 SizerNewSizeOnly,
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	128 SizerMaxNewSizeOnly,
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	129 SizerMaxAndNewSize,
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	130 SizerNewRatio
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	131 };
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	132 SizerKind _sizer_kind;
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	133 uint _min_desired_young_length;
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	134 uint _max_desired_young_length;
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	135 bool _adaptive_size;
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	136 uint calculate_default_min_length(uint new_number_of_heap_regions);
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	137 uint calculate_default_max_length(uint new_number_of_heap_regions);
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	138
13060 8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13059 diff changeset	139 // Update the given values for minimum and maximum young gen length in regions
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13059 diff changeset	140 // given the number of heap regions depending on the kind of sizing algorithm.
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13059 diff changeset	141 void recalculate_min_max_young_length(uint number_of_heap_regions, uint* min_young_length, uint* max_young_length);
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13059 diff changeset	142
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	143 public:
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	144 G1YoungGenSizer();
13060 8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13059 diff changeset	145 // Calculate the maximum length of the young gen given the number of regions
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13059 diff changeset	146 // depending on the sizing algorithm.
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13059 diff changeset	147 uint max_young_length(uint number_of_heap_regions);
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13059 diff changeset	148
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	149 void heap_size_changed(uint new_number_of_heap_regions);
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	150 uint min_desired_young_length() {
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	151 return _min_desired_young_length;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	152 }
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	153 uint max_desired_young_length() {
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	154 return _max_desired_young_length;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	155 }
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	156 bool adaptive_young_list_length() {
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	157 return _adaptive_size;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	158 }
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	159 };
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	160
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	161 class G1CollectorPolicy: public CollectorPolicy {
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3980 diff changeset	162 private:
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	163 // either equal to the number of parallel threads, if ParallelGCThreads
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	164 // has been set, or 1 otherwise
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	165 int _parallel_gc_threads;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	166
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	167 // The number of GC threads currently active.
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	168 uintx _no_of_gc_threads;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	169
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	170 enum SomePrivateConstants {
942 2c79770d1f6e 6819085: G1: use larger and/or user settable region size tonyp parents: 936 diff changeset	171 NumPrevPausesForHeuristics = 10
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	172 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	173
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	174 G1MMUTracker* _mmu_tracker;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	175
13060 8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13059 diff changeset	176 void initialize_alignments();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	177 void initialize_flags();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	178
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3980 diff changeset	179 CollectionSetChooser* _collectionSetChooser;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	180
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	181 double _full_collection_start_sec;
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	182 uint _cur_collection_pause_used_regions_at_start;
890 6cb8e9df7174 6819077: G1: first GC thread coming late into the GC. johnc parents: 838 diff changeset	183
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	184 // These exclude marking times.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	185 TruncatedSeq* _recent_gc_times_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	186
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	187 TruncatedSeq* _concurrent_mark_remark_times_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	188 TruncatedSeq* _concurrent_mark_cleanup_times_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	189
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	190 TraceGen0TimeData _trace_gen0_time_data;
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	191 TraceGen1TimeData _trace_gen1_time_data;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	192
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	193 double _stop_world_start;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	194
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	195 // indicates whether we are in young or mixed GC mode
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	196 bool _gcs_are_young;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	197
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	198 uint _young_list_target_length;
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	199 uint _young_list_fixed_length;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	200
1991 016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	201 // The max number of regions we can extend the eden by while the GC
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	202 // locker is active. This should be >= _young_list_target_length;
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	203 uint _young_list_max_length;
1991 016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	204
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	205 bool _last_gc_was_young;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	206
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	207 bool _during_marking;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	208 bool _in_marking_window;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	209 bool _in_marking_window_im;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	210
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	211 SurvRateGroup* _short_lived_surv_rate_group;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	212 SurvRateGroup* _survivor_surv_rate_group;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	213 // add here any more surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	214
1356 56507bcd639e 6937160: G1: should observe GCTimeRatio tonyp parents: 1111 diff changeset	215 double _gc_overhead_perc;
56507bcd639e 6937160: G1: should observe GCTimeRatio tonyp parents: 1111 diff changeset	216
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	217 double _reserve_factor;
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	218 uint _reserve_regions;
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	219
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	220 bool during_marking() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	221 return _during_marking;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	222 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	223
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	224 enum PredictionConstants {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	225 TruncatedSeqLength = 10
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	226 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	227
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	228 TruncatedSeq* _alloc_rate_ms_seq;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	229 double _prev_collection_pause_end_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	230
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	231 TruncatedSeq* _rs_length_diff_seq;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	232 TruncatedSeq* _cost_per_card_ms_seq;
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	233 TruncatedSeq* _young_cards_per_entry_ratio_seq;
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	234 TruncatedSeq* _mixed_cards_per_entry_ratio_seq;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	235 TruncatedSeq* _cost_per_entry_ms_seq;
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	236 TruncatedSeq* _mixed_cost_per_entry_ms_seq;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	237 TruncatedSeq* _cost_per_byte_ms_seq;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	238 TruncatedSeq* _constant_other_time_ms_seq;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	239 TruncatedSeq* _young_other_cost_per_region_ms_seq;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	240 TruncatedSeq* _non_young_other_cost_per_region_ms_seq;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	241
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	242 TruncatedSeq* _pending_cards_seq;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	243 TruncatedSeq* _rs_lengths_seq;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	244
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	245 TruncatedSeq* _cost_per_byte_ms_during_cm_seq;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	246
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	247 G1YoungGenSizer* _young_gen_sizer;
3920 af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	248
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	249 uint _eden_cset_region_length;
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	250 uint _survivor_cset_region_length;
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	251 uint _old_cset_region_length;
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4023 diff changeset	252
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	253 void init_cset_region_lengths(uint eden_cset_region_length,
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	254 uint survivor_cset_region_length);
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4023 diff changeset	255
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	256 uint eden_cset_region_length() { return _eden_cset_region_length; }
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	257 uint survivor_cset_region_length() { return _survivor_cset_region_length; }
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	258 uint old_cset_region_length() { return _old_cset_region_length; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	259
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	260 uint _free_regions_at_end_of_collection;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	261
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	262 size_t _recorded_rs_lengths;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	263 size_t _max_rs_lengths;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	264 double _sigma;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	265
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	266 size_t _rs_lengths_prediction;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	267
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	268 double sigma() { return _sigma; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	269
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	270 // A function that prevents us putting too much stock in small sample
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	271 // sets. Returns a number between 2.0 and 1.0, depending on the number
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	272 // of samples. 5 or more samples yields one; fewer scales linearly from
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	273 // 2.0 at 1 sample to 1.0 at 5.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	274 double confidence_factor(int samples) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	275 if (samples > 4) return 1.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	276 else return 1.0 + sigma() * ((double)(5 - samples))/2.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	277 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	278
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	279 double get_new_neg_prediction(TruncatedSeq* seq) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	280 return seq->davg() - sigma() * seq->dsd();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	281 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	282
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	283 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	284 bool verify_young_ages(HeapRegion* head, SurvRateGroup *surv_rate_group);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	285 #endif // PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	286
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 942 diff changeset	287 void adjust_concurrent_refinement(double update_rs_time,
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 942 diff changeset	288 double update_rs_processed_buffers,
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 942 diff changeset	289 double goal_ms);
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 942 diff changeset	290
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	291 uintx no_of_gc_threads() { return _no_of_gc_threads; }
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	292 void set_no_of_gc_threads(uintx v) { _no_of_gc_threads = v; }
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	293
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	294 double _pause_time_target_ms;
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	295
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	296 size_t _pending_cards;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	297
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	298 public:
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	299 // Accessors
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	300
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4023 diff changeset	301 void set_region_eden(HeapRegion* hr, int young_index_in_cset) {
20481 c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit brutisso parents: 17727 diff changeset	302 hr->set_eden();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	303 hr->install_surv_rate_group(_short_lived_surv_rate_group);
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4023 diff changeset	304 hr->set_young_index_in_cset(young_index_in_cset);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	305 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	306
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4023 diff changeset	307 void set_region_survivor(HeapRegion* hr, int young_index_in_cset) {
20481 c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit brutisso parents: 17727 diff changeset	308 assert(hr->is_survivor(), "pre-condition");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	309 hr->install_surv_rate_group(_survivor_surv_rate_group);
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4023 diff changeset	310 hr->set_young_index_in_cset(young_index_in_cset);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	311 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	312
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	313 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	314 bool verify_young_ages();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	315 #endif // PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	316
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	317 double get_new_prediction(TruncatedSeq* seq) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	318 return MAX2(seq->davg() + sigma() * seq->dsd(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	319 seq->davg() * confidence_factor(seq->num()));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	320 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	321
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	322 void record_max_rs_lengths(size_t rs_lengths) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	323 _max_rs_lengths = rs_lengths;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	324 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	325
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	326 size_t predict_rs_length_diff() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	327 return (size_t) get_new_prediction(_rs_length_diff_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	328 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	329
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	330 double predict_alloc_rate_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	331 return get_new_prediction(_alloc_rate_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	332 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	333
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	334 double predict_cost_per_card_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	335 return get_new_prediction(_cost_per_card_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	336 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	337
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	338 double predict_rs_update_time_ms(size_t pending_cards) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	339 return (double) pending_cards * predict_cost_per_card_ms();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	340 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	341
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	342 double predict_young_cards_per_entry_ratio() {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	343 return get_new_prediction(_young_cards_per_entry_ratio_seq);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	344 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	345
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	346 double predict_mixed_cards_per_entry_ratio() {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	347 if (_mixed_cards_per_entry_ratio_seq->num() < 2) {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	348 return predict_young_cards_per_entry_ratio();
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	349 } else {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	350 return get_new_prediction(_mixed_cards_per_entry_ratio_seq);
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	351 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	352 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	353
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	354 size_t predict_young_card_num(size_t rs_length) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	355 return (size_t) ((double) rs_length *
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	356 predict_young_cards_per_entry_ratio());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	357 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	358
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	359 size_t predict_non_young_card_num(size_t rs_length) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	360 return (size_t) ((double) rs_length *
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	361 predict_mixed_cards_per_entry_ratio());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	362 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	363
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	364 double predict_rs_scan_time_ms(size_t card_num) {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	365 if (gcs_are_young()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	366 return (double) card_num * get_new_prediction(_cost_per_entry_ms_seq);
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	367 } else {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	368 return predict_mixed_rs_scan_time_ms(card_num);
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	369 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	370 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	371
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	372 double predict_mixed_rs_scan_time_ms(size_t card_num) {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	373 if (_mixed_cost_per_entry_ms_seq->num() < 3) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	374 return (double) card_num * get_new_prediction(_cost_per_entry_ms_seq);
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	375 } else {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	376 return (double) (card_num *
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	377 get_new_prediction(_mixed_cost_per_entry_ms_seq));
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	378 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	379 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	380
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	381 double predict_object_copy_time_ms_during_cm(size_t bytes_to_copy) {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	382 if (_cost_per_byte_ms_during_cm_seq->num() < 3) {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	383 return (1.1 * (double) bytes_to_copy) *
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	384 get_new_prediction(_cost_per_byte_ms_seq);
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	385 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	386 return (double) bytes_to_copy *
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	387 get_new_prediction(_cost_per_byte_ms_during_cm_seq);
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	388 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	389 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	390
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	391 double predict_object_copy_time_ms(size_t bytes_to_copy) {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	392 if (_in_marking_window && !_in_marking_window_im) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	393 return predict_object_copy_time_ms_during_cm(bytes_to_copy);
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	394 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	395 return (double) bytes_to_copy *
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	396 get_new_prediction(_cost_per_byte_ms_seq);
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	397 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	398 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	399
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	400 double predict_constant_other_time_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	401 return get_new_prediction(_constant_other_time_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	402 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	403
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	404 double predict_young_other_time_ms(size_t young_num) {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	405 return (double) young_num *
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	406 get_new_prediction(_young_other_cost_per_region_ms_seq);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	407 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	408
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	409 double predict_non_young_other_time_ms(size_t non_young_num) {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	410 return (double) non_young_num *
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	411 get_new_prediction(_non_young_other_cost_per_region_ms_seq);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	412 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	413
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	414 double predict_base_elapsed_time_ms(size_t pending_cards);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	415 double predict_base_elapsed_time_ms(size_t pending_cards,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	416 size_t scanned_cards);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	417 size_t predict_bytes_to_copy(HeapRegion* hr);
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6220 diff changeset	418 double predict_region_elapsed_time_ms(HeapRegion* hr, bool for_young_gc);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	419
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4023 diff changeset	420 void set_recorded_rs_lengths(size_t rs_lengths);
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	421
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	422 uint cset_region_length() { return young_cset_region_length() +
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	423 old_cset_region_length(); }
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	424 uint young_cset_region_length() { return eden_cset_region_length() +
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	425 survivor_cset_region_length(); }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	426
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	427 double predict_survivor_regions_evac_time();
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	428
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	429 void cset_regions_freed() {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	430 bool propagate = _last_gc_was_young && !_in_marking_window;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	431 _short_lived_surv_rate_group->all_surviving_words_recorded(propagate);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	432 _survivor_surv_rate_group->all_surviving_words_recorded(propagate);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	433 // also call it on any more surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	434 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	435
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	436 G1MMUTracker* mmu_tracker() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	437 return _mmu_tracker;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	438 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	439
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	440 double max_pause_time_ms() {
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	441 return _mmu_tracker->max_gc_time() * 1000.0;
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	442 }
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	443
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	444 double predict_remark_time_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	445 return get_new_prediction(_concurrent_mark_remark_times_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	446 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	447
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	448 double predict_cleanup_time_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	449 return get_new_prediction(_concurrent_mark_cleanup_times_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	450 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	451
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	452 // Returns an estimate of the survival rate of the region at yg-age
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	453 // "yg_age".
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	454 double predict_yg_surv_rate(int age, SurvRateGroup* surv_rate_group) {
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	455 TruncatedSeq* seq = surv_rate_group->get_seq(age);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	456 if (seq->num() == 0)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	457 gclog_or_tty->print("BARF! age is %d", age);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	458 guarantee( seq->num() > 0, "invariant" );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	459 double pred = get_new_prediction(seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	460 if (pred > 1.0)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	461 pred = 1.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	462 return pred;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	463 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	464
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	465 double predict_yg_surv_rate(int age) {
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	466 return predict_yg_surv_rate(age, _short_lived_surv_rate_group);
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	467 }
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	468
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	469 double accum_yg_surv_rate_pred(int age) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	470 return _short_lived_surv_rate_group->accum_surv_rate_pred(age);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	471 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	472
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3980 diff changeset	473 private:
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	474 // Statistics kept per GC stoppage, pause or full.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	475 TruncatedSeq* _recent_prev_end_times_for_all_gcs_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	476
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	477 // Add a new GC of the given duration and end time to the record.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	478 void update_recent_gc_times(double end_time_sec, double elapsed_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	479
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	480 // The head of the list (via "next_in_collection_set()") representing the
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	481 // current collection set. Set from the incrementally built collection
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	482 // set at the start of the pause.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	483 HeapRegion* _collection_set;
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	484
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	485 // The number of bytes in the collection set before the pause. Set from
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	486 // the incrementally built collection set at the start of an evacuation
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6220 diff changeset	487 // pause, and incremented in finalize_cset() when adding old regions
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6220 diff changeset	488 // (if any) to the collection set.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	489 size_t _collection_set_bytes_used_before;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	490
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6220 diff changeset	491 // The number of bytes copied during the GC.
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6220 diff changeset	492 size_t _bytes_copied_during_gc;
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6220 diff changeset	493
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	494 // The associated information that is maintained while the incremental
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	495 // collection set is being built with young regions. Used to populate
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	496 // the recorded info for the evacuation pause.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	497
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	498 enum CSetBuildType {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	499 Active, // We are actively building the collection set
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	500 Inactive // We are not actively building the collection set
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	501 };
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	502
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	503 CSetBuildType _inc_cset_build_state;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	504
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	505 // The head of the incrementally built collection set.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	506 HeapRegion* _inc_cset_head;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	507
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	508 // The tail of the incrementally built collection set.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	509 HeapRegion* _inc_cset_tail;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	510
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	511 // The number of bytes in the incrementally built collection set.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	512 // Used to set _collection_set_bytes_used_before at the start of
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	513 // an evacuation pause.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	514 size_t _inc_cset_bytes_used_before;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	515
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	516 // Used to record the highest end of heap region in collection set
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	517 HeapWord* _inc_cset_max_finger;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	518
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	519 // The RSet lengths recorded for regions in the CSet. It is updated
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	520 // by the thread that adds a new region to the CSet. We assume that
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	521 // only one thread can be allocating a new CSet region (currently,
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	522 // it does so after taking the Heap_lock) hence no need to
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	523 // synchronize updates to this field.
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	524 size_t _inc_cset_recorded_rs_lengths;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	525
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	526 // A concurrent refinement thread periodcially samples the young
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	527 // region RSets and needs to update _inc_cset_recorded_rs_lengths as
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	528 // the RSets grow. Instead of having to syncronize updates to that
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	529 // field we accumulate them in this field and add it to
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	530 // _inc_cset_recorded_rs_lengths_diffs at the start of a GC.
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	531 ssize_t _inc_cset_recorded_rs_lengths_diffs;
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	532
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	533 // The predicted elapsed time it will take to collect the regions in
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	534 // the CSet. This is updated by the thread that adds a new region to
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	535 // the CSet. See the comment for _inc_cset_recorded_rs_lengths about
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	536 // MT-safety assumptions.
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	537 double _inc_cset_predicted_elapsed_time_ms;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	538
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	539 // See the comment for _inc_cset_recorded_rs_lengths_diffs.
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	540 double _inc_cset_predicted_elapsed_time_ms_diffs;
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	541
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	542 // Stash a pointer to the g1 heap.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	543 G1CollectedHeap* _g1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	544
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	545 G1GCPhaseTimes* _phase_times;
922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	546
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	547 // The ratio of gc time to elapsed time, computed over recent pauses.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	548 double _recent_avg_pause_time_ratio;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	549
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	550 double recent_avg_pause_time_ratio() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	551 return _recent_avg_pause_time_ratio;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	552 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	553
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	554 // At the end of a pause we check the heap occupancy and we decide
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	555 // whether we will start a marking cycle during the next pause. If
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	556 // we decide that we want to do that, we will set this parameter to
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	557 // true. So, this parameter will stay true between the end of a
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	558 // pause and the beginning of a subsequent pause (not necessarily
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	559 // the next one, see the comments on the next field) when we decide
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	560 // that we will indeed start a marking cycle and do the initial-mark
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	561 // work.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	562 volatile bool _initiate_conc_mark_if_possible;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	563
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	564 // If initiate_conc_mark_if_possible() is set at the beginning of a
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	565 // pause, it is a suggestion that the pause should start a marking
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	566 // cycle by doing the initial-mark work. However, it is possible
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	567 // that the concurrent marking thread is still finishing up the
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	568 // previous marking cycle (e.g., clearing the next marking
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	569 // bitmap). If that is the case we cannot start a new cycle and
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	570 // we'll have to wait for the concurrent marking thread to finish
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	571 // what it is doing. In this case we will postpone the marking cycle
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	572 // initiation decision for the next pause. When we eventually decide
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	573 // to start a cycle, we will set _during_initial_mark_pause which
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	574 // will stay true until the end of the initial-mark pause and it's
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	575 // the condition that indicates that a pause is doing the
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	576 // initial-mark work.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	577 volatile bool _during_initial_mark_pause;
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	578
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	579 bool _last_young_gc;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	580
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	581 // This set of variables tracks the collector efficiency, in order to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	582 // determine whether we should initiate a new marking.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	583 double _cur_mark_stop_world_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	584 double _mark_remark_start_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	585 double _mark_cleanup_start_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	586
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	587 // Update the young list target length either by setting it to the
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	588 // desired fixed value or by calculating it using G1's pause
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	589 // prediction model. If no rs_lengths parameter is passed, predict
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	590 // the RS lengths using the prediction model, otherwise use the
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	591 // given rs_lengths as the prediction.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	592 void update_young_list_target_length(size_t rs_lengths = (size_t) -1);
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	593
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	594 // Calculate and return the minimum desired young list target
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	595 // length. This is the minimum desired young list length according
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	596 // to the user's inputs.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	597 uint calculate_young_list_desired_min_length(uint base_min_length);
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	598
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	599 // Calculate and return the maximum desired young list target
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	600 // length. This is the maximum desired young list length according
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	601 // to the user's inputs.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	602 uint calculate_young_list_desired_max_length();
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	603
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	604 // Calculate and return the maximum young list target length that
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	605 // can fit into the pause time goal. The parameters are: rs_lengths
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	606 // represent the prediction of how large the young RSet lengths will
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	607 // be, base_min_length is the alreay existing number of regions in
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	608 // the young list, min_length and max_length are the desired min and
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	609 // max young list length according to the user's inputs.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	610 uint calculate_young_list_target_length(size_t rs_lengths,
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	611 uint base_min_length,
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	612 uint desired_min_length,
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	613 uint desired_max_length);
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	614
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	615 // Check whether a given young length (young_length) fits into the
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	616 // given target pause time and whether the prediction for the amount
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	617 // of objects to be copied for the given length will fit into the
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	618 // given free space (expressed by base_free_regions). It is used by
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	619 // calculate_young_list_target_length().
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	620 bool predict_will_fit(uint young_length, double base_time_ms,
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	621 uint base_free_regions, double target_pause_time_ms);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	622
8681 27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 7449 diff changeset	623 // Calculate the minimum number of old regions we'll add to the CSet
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 7449 diff changeset	624 // during a mixed GC.
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 7449 diff changeset	625 uint calc_min_old_cset_length();
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 7449 diff changeset	626
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 7449 diff changeset	627 // Calculate the maximum number of old regions we'll add to the CSet
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 7449 diff changeset	628 // during a mixed GC.
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 7449 diff changeset	629 uint calc_max_old_cset_length();
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 7449 diff changeset	630
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 7449 diff changeset	631 // Returns the given amount of uncollected reclaimable space
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 7449 diff changeset	632 // as a percentage of the current heap capacity.
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 7449 diff changeset	633 double reclaimable_bytes_perc(size_t reclaimable_bytes);
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 7449 diff changeset	634
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	635 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	636
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	637 G1CollectorPolicy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	638
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	639 virtual G1CollectorPolicy* as_g1_policy() { return this; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	640
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	641 virtual CollectorPolicy::Name kind() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	642 return CollectorPolicy::G1CollectorPolicyKind;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	643 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	644
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	645 G1GCPhaseTimes* phase_times() const { return _phase_times; }
922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	646
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	647 // Check the current value of the young list RSet lengths and
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	648 // compare it against the last prediction. If the current value is
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	649 // higher, recalculate the young list target length prediction.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	650 void revise_young_list_target_length_if_necessary();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	651
3920 af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	652 // This should be called after the heap is resized.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	653 void record_new_heap_size(uint new_number_of_regions);
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	654
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3980 diff changeset	655 void init();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	656
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	657 // Create jstat counters for the policy.
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	658 virtual void initialize_gc_policy_counters();
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	659
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	660 virtual HeapWord* mem_allocate_work(size_t size,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	661 bool is_tlab,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	662 bool* gc_overhead_limit_was_exceeded);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	663
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	664 // This method controls how a collector handles one or more
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	665 // of its generations being fully allocated.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	666 virtual HeapWord* satisfy_failed_allocation(size_t size,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	667 bool is_tlab);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	668
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	669 BarrierSet::Name barrier_set_name() { return BarrierSet::G1SATBCTLogging; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	670
4834 6a78aa6ac1ff 7132311: G1: assert((s == klass->oop_size(this)) \|\| (Universe::heap()->is_gc_active() && ((is_typeArray()... brutisso parents: 4829 diff changeset	671 bool need_to_start_conc_mark(const char* source, size_t alloc_word_size = 0);
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	672
10098 71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	673 // Record the start and end of an evacuation pause.
71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	674 void record_collection_pause_start(double start_time_sec);
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10291 diff changeset	675 void record_collection_pause_end(double pause_time_ms, EvacuationInfo& evacuation_info);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	676
10098 71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	677 // Record the start and end of a full collection.
71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	678 void record_full_collection_start();
71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	679 void record_full_collection_end();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	680
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	681 // Must currently be called while the world is stopped.
10098 71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	682 void record_concurrent_mark_init_end(double mark_init_elapsed_time_ms);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	683
10098 71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	684 // Record start and end of remark.
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3980 diff changeset	685 void record_concurrent_mark_remark_start();
074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3980 diff changeset	686 void record_concurrent_mark_remark_end();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	687
10098 71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	688 // Record start, end, and completion of cleanup.
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3980 diff changeset	689 void record_concurrent_mark_cleanup_start();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	690 void record_concurrent_mark_cleanup_end(int no_of_gc_threads);
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3980 diff changeset	691 void record_concurrent_mark_cleanup_completed();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	692
10098 71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	693 // Records the information about the heap size for reporting in
71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	694 // print_detailed_heap_transition
10291 48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10098 diff changeset	695 void record_heap_size_info_at_start(bool full);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	696
10098 71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	697 // Print heap sizing transition (with less and more detail).
3764 053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	698 void print_heap_transition();
10291 48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10098 diff changeset	699 void print_detailed_heap_transition(bool full = false);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	700
10098 71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	701 void record_stop_world_start();
71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	702 void record_concurrent_pause();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	703
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	704 // Record how much space we copied during a GC. This is typically
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	705 // called when a GC alloc region is being retired.
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	706 void record_bytes_copied_during_gc(size_t bytes) {
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	707 _bytes_copied_during_gc += bytes;
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	708 }
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	709
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	710 // The amount of space we copied during a GC.
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	711 size_t bytes_copied_during_gc() {
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	712 return _bytes_copied_during_gc;
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	713 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	714
5972 9a9bb0010c91 7156764: Remove unused size parameter from some CollectedHeap methods brutisso parents: 4912 diff changeset	715 // Determine whether there are candidate regions so that the
9a9bb0010c91 7156764: Remove unused size parameter from some CollectedHeap methods brutisso parents: 4912 diff changeset	716 // next GC should be mixed. The two action strings are used
9a9bb0010c91 7156764: Remove unused size parameter from some CollectedHeap methods brutisso parents: 4912 diff changeset	717 // in the ergo output when the method returns true or false.
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	718 bool next_gc_should_be_mixed(const char* true_action_str,
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	719 const char* false_action_str);
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	720
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	721 // Choose a new collection set. Marks the chosen regions as being
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	722 // "in_collection_set", and links them together. The head and number of
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	723 // the collection set are available via access methods.
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10291 diff changeset	724 void finalize_cset(double target_pause_time_ms, EvacuationInfo& evacuation_info);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	725
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	726 // The head of the list (via "next_in_collection_set()") representing the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	727 // current collection set.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	728 HeapRegion* collection_set() { return _collection_set; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	729
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	730 void clear_collection_set() { _collection_set = NULL; }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	731
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4023 diff changeset	732 // Add old region "hr" to the CSet.
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4023 diff changeset	733 void add_old_region_to_cset(HeapRegion* hr);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	734
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	735 // Incremental CSet Support
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	736
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	737 // The head of the incrementally built collection set.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	738 HeapRegion* inc_cset_head() { return _inc_cset_head; }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	739
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	740 // The tail of the incrementally built collection set.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	741 HeapRegion* inc_set_tail() { return _inc_cset_tail; }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	742
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	743 // Initialize incremental collection set info.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	744 void start_incremental_cset_building();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	745
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	746 // Perform any final calculations on the incremental CSet fields
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	747 // before we can use them.
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	748 void finalize_incremental_cset_building();
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	749
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	750 void clear_incremental_cset() {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	751 _inc_cset_head = NULL;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	752 _inc_cset_tail = NULL;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	753 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	754
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	755 // Stop adding regions to the incremental collection set
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	756 void stop_incremental_cset_building() { _inc_cset_build_state = Inactive; }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	757
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	758 // Add information about hr to the aggregated information for the
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	759 // incrementally built collection set.
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	760 void add_to_incremental_cset_info(HeapRegion* hr, size_t rs_length);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	761
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	762 // Update information about hr in the aggregated information for
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	763 // the incrementally built collection set.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	764 void update_incremental_cset_info(HeapRegion* hr, size_t new_rs_length);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	765
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	766 private:
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	767 // Update the incremental cset information when adding a region
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	768 // (should not be called directly).
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	769 void add_region_to_incremental_cset_common(HeapRegion* hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	770
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	771 public:
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	772 // Add hr to the LHS of the incremental collection set.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	773 void add_region_to_incremental_cset_lhs(HeapRegion* hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	774
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	775 // Add hr to the RHS of the incremental collection set.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	776 void add_region_to_incremental_cset_rhs(HeapRegion* hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	777
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	778 #ifndef PRODUCT
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	779 void print_collection_set(HeapRegion* list_head, outputStream* st);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	780 #endif // !PRODUCT
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	781
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	782 bool initiate_conc_mark_if_possible() { return _initiate_conc_mark_if_possible; }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	783 void set_initiate_conc_mark_if_possible() { _initiate_conc_mark_if_possible = true; }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	784 void clear_initiate_conc_mark_if_possible() { _initiate_conc_mark_if_possible = false; }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	785
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	786 bool during_initial_mark_pause() { return _during_initial_mark_pause; }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	787 void set_during_initial_mark_pause() { _during_initial_mark_pause = true; }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	788 void clear_during_initial_mark_pause(){ _during_initial_mark_pause = false; }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	789
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	790 // This sets the initiate_conc_mark_if_possible() flag to start a
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	791 // new cycle, as long as we are not already in one. It's best if it
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	792 // is called during a safepoint when the test whether a cycle is in
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	793 // progress or not is stable.
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	794 bool force_initial_mark_if_outside_cycle(GCCause::Cause gc_cause);
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	795
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	796 // This is called at the very beginning of an evacuation pause (it
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	797 // has to be the first thing that the pause does). If
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	798 // initiate_conc_mark_if_possible() is true, and the concurrent
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	799 // marking thread has completed its work during the previous cycle,
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	800 // it will set during_initial_mark_pause() to so that the pause does
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	801 // the initial-mark work and start a marking cycle.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	802 void decide_on_conc_mark_initiation();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	803
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	804 // If an expansion would be appropriate, because recent GC overhead had
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	805 // exceeded the desired limit, return an amount to expand by.
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3980 diff changeset	806 size_t expansion_amount();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	807
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	808 // Print tracing information.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	809 void print_tracing_info() const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	810
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	811 // Print stats on young survival ratio
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	812 void print_yg_surv_rate_info() const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	813
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	814 void finished_recalculating_age_indexes(bool is_survivors) {
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	815 if (is_survivors) {
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	816 _survivor_surv_rate_group->finished_recalculating_age_indexes();
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	817 } else {
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	818 _short_lived_surv_rate_group->finished_recalculating_age_indexes();
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	819 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	820 // do that for any other surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	821 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	822
17727 cfd4aac53239 8030177: G1: Enable TLAB resizing brutisso parents: 13060 diff changeset	823 size_t young_list_target_length() const { return _young_list_target_length; }
cfd4aac53239 8030177: G1: Enable TLAB resizing brutisso parents: 13060 diff changeset	824
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	825 bool is_young_list_full() {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	826 uint young_list_length = _g1->young_list()->length();
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	827 uint young_list_target_length = _young_list_target_length;
1991 016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	828 return young_list_length >= young_list_target_length;
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	829 }
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	830
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	831 bool can_expand_young_list() {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	832 uint young_list_length = _g1->young_list()->length();
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	833 uint young_list_max_length = _young_list_max_length;
1991 016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	834 return young_list_length < young_list_max_length;
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	835 }
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	836
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	837 uint young_list_max_length() {
3980 8229bd737950 7075646: G1: fix inconsistencies in the monitoring data tonyp parents: 3979 diff changeset	838 return _young_list_max_length;
8229bd737950 7075646: G1: fix inconsistencies in the monitoring data tonyp parents: 3979 diff changeset	839 }
8229bd737950 7075646: G1: fix inconsistencies in the monitoring data tonyp parents: 3979 diff changeset	840
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	841 bool gcs_are_young() {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	842 return _gcs_are_young;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	843 }
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	844 void set_gcs_are_young(bool gcs_are_young) {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	845 _gcs_are_young = gcs_are_young;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	846 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	847
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	848 bool adaptive_young_list_length() {
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	849 return _young_gen_sizer->adaptive_young_list_length();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	850 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	851
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3980 diff changeset	852 private:
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	853 //
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	854 // Survivor regions policy.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	855 //
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	856
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	857 // Current tenuring threshold, set to 0 if the collector reaches the
6818 22b8d3d181d9 8000351: Tenuring threshold should be unsigned jwilhelm parents: 6725 diff changeset	858 // maximum amount of survivors regions.
22b8d3d181d9 8000351: Tenuring threshold should be unsigned jwilhelm parents: 6725 diff changeset	859 uint _tenuring_threshold;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	860
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	861 // The limit on the number of regions allocated for survivors.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	862 uint _max_survivor_regions;
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	863
3764 053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	864 // For reporting purposes.
10291 48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10098 diff changeset	865 // The value of _heap_bytes_before_gc is also used to calculate
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10098 diff changeset	866 // the cost of copying.
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10098 diff changeset	867
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10098 diff changeset	868 size_t _eden_used_bytes_before_gc; // Eden occupancy before GC
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10098 diff changeset	869 size_t _survivor_used_bytes_before_gc; // Survivor occupancy before GC
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10098 diff changeset	870 size_t _heap_used_bytes_before_gc; // Heap occupancy before GC
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10098 diff changeset	871 size_t _metaspace_used_bytes_before_gc; // Metaspace occupancy before GC
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10098 diff changeset	872
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10098 diff changeset	873 size_t _eden_capacity_bytes_before_gc; // Eden capacity before GC
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10098 diff changeset	874 size_t _heap_capacity_bytes_before_gc; // Heap capacity before GC
3764 053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	875
6818 22b8d3d181d9 8000351: Tenuring threshold should be unsigned jwilhelm parents: 6725 diff changeset	876 // The amount of survivor regions after a collection.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	877 uint _recorded_survivor_regions;
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	878 // List of survivor regions.
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	879 HeapRegion* _recorded_survivor_head;
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	880 HeapRegion* _recorded_survivor_tail;
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	881
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	882 ageTable _survivors_age_table;
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	883
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	884 public:
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10291 diff changeset	885 uint tenuring_threshold() const { return _tenuring_threshold; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	886
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	887 inline GCAllocPurpose
6818 22b8d3d181d9 8000351: Tenuring threshold should be unsigned jwilhelm parents: 6725 diff changeset	888 evacuation_destination(HeapRegion* src_region, uint age, size_t word_sz) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	889 if (age < _tenuring_threshold && src_region->is_young()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	890 return GCAllocForSurvived;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	891 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	892 return GCAllocForTenured;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	893 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	894 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	895
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	896 inline bool track_object_age(GCAllocPurpose purpose) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	897 return purpose == GCAllocForSurvived;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	898 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	899
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	900 static const uint REGIONS_UNLIMITED = (uint) -1;
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	901
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	902 uint max_regions(int purpose);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	903
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	904 // The limit on regions for a particular purpose is reached.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	905 void note_alloc_region_limit_reached(int purpose) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	906 if (purpose == GCAllocForSurvived) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	907 _tenuring_threshold = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	908 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	909 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	910
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	911 void note_start_adding_survivor_regions() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	912 _survivor_surv_rate_group->start_adding_regions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	913 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	914
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	915 void note_stop_adding_survivor_regions() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	916 _survivor_surv_rate_group->stop_adding_regions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	917 }
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	918
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	919 void record_survivor_regions(uint regions,
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	920 HeapRegion* head,
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	921 HeapRegion* tail) {
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	922 _recorded_survivor_regions = regions;
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	923 _recorded_survivor_head = head;
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	924 _recorded_survivor_tail = tail;
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	925 }
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	926
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	927 uint recorded_survivor_regions() {
838 0316eac49d5a 6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set tonyp parents: 794 diff changeset	928 return _recorded_survivor_regions;
0316eac49d5a 6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set tonyp parents: 794 diff changeset	929 }
0316eac49d5a 6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set tonyp parents: 794 diff changeset	930
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	931 void record_thread_age_table(ageTable* age_table) {
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	932 _survivors_age_table.merge_par(age_table);
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	933 }
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	934
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	935 void update_max_gc_locker_expansion();
1991 016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	936
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	937 // Calculates survivor space parameters.
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	938 void update_survivors_policy();
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	939
13060 8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13059 diff changeset	940 virtual void post_heap_initialize();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	941 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	942
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	943 // This should move to some place more general...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	944
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	945 // If we have "n" measurements, and we've kept track of their "sum" and the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	946 // "sum_of_squares" of the measurements, this returns the variance of the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	947 // sequence.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	948 inline double variance(int n, double sum_of_squares, double sum) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	949 double n_d = (double)n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	950 double avg = sum/n_d;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	951 return (sum_of_squares - 2.0 * avg * sum + n_d * avg * avg) / n_d;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	952 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	953
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1707 diff changeset	954 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTORPOLICY_HPP

Mercurial > hg > truffle

annotate src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp @ 20481:c02ec279b062