graal-compiler: src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp annotate

annotate src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp @ 13059:46d7652b223c

8026853: Prepare GC code for collector policy regression fix Summary: Cleanup related to the NewSize and MaxNewSize bugs Reviewed-by: tschatzl, jcoomes, ehelin

author	jwilhelm
date	Mon, 21 Oct 2013 18:56:20 +0200
parents	4288e54fd145
children	8f07aa079343

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
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	139 public:
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	140 G1YoungGenSizer();
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	141 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	142 uint min_desired_young_length() {
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	143 return _min_desired_young_length;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	144 }
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	145 uint max_desired_young_length() {
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	146 return _max_desired_young_length;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	147 }
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	148 bool adaptive_young_list_length() {
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	149 return _adaptive_size;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	150 }
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	151 };
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	152
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	153 class G1CollectorPolicy: public CollectorPolicy {
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3980 diff changeset	154 private:
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	155 // either equal to the number of parallel threads, if ParallelGCThreads
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	156 // has been set, or 1 otherwise
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	157 int _parallel_gc_threads;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	158
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	159 // The number of GC threads currently active.
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	160 uintx _no_of_gc_threads;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	161
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	162 enum SomePrivateConstants {
942 2c79770d1f6e 6819085: G1: use larger and/or user settable region size tonyp parents: 936 diff changeset	163 NumPrevPausesForHeuristics = 10
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	164 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	165
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	166 G1MMUTracker* _mmu_tracker;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	167
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	168 void initialize_flags();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	169
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	170 void initialize_all() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	171 initialize_flags();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	172 initialize_size_info();
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
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3980 diff changeset	175 CollectionSetChooser* _collectionSetChooser;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	176
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	177 double _full_collection_start_sec;
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	178 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	179
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	180 // These exclude marking times.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	181 TruncatedSeq* _recent_gc_times_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	182
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	183 TruncatedSeq* _concurrent_mark_remark_times_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	184 TruncatedSeq* _concurrent_mark_cleanup_times_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	185
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	186 TraceGen0TimeData _trace_gen0_time_data;
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6059 diff changeset	187 TraceGen1TimeData _trace_gen1_time_data;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	188
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	189 double _stop_world_start;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	190
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	191 // 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	192 bool _gcs_are_young;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	193
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	194 uint _young_list_target_length;
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	195 uint _young_list_fixed_length;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	196
1991 016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	197 // 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	198 // 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	199 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	200
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	201 bool _last_gc_was_young;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	202
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	203 bool _during_marking;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	204 bool _in_marking_window;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	205 bool _in_marking_window_im;
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 SurvRateGroup* _short_lived_surv_rate_group;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	208 SurvRateGroup* _survivor_surv_rate_group;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	209 // add here any more surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	210
1356 56507bcd639e 6937160: G1: should observe GCTimeRatio tonyp parents: 1111 diff changeset	211 double _gc_overhead_perc;
56507bcd639e 6937160: G1: should observe GCTimeRatio tonyp parents: 1111 diff changeset	212
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	213 double _reserve_factor;
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	214 uint _reserve_regions;
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	215
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	216 bool during_marking() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	217 return _during_marking;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	218 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	219
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	220 enum PredictionConstants {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	221 TruncatedSeqLength = 10
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 TruncatedSeq* _alloc_rate_ms_seq;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	225 double _prev_collection_pause_end_ms;
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 TruncatedSeq* _rs_length_diff_seq;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	228 TruncatedSeq* _cost_per_card_ms_seq;
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	229 TruncatedSeq* _young_cards_per_entry_ratio_seq;
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	230 TruncatedSeq* _mixed_cards_per_entry_ratio_seq;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	231 TruncatedSeq* _cost_per_entry_ms_seq;
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	232 TruncatedSeq* _mixed_cost_per_entry_ms_seq;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	233 TruncatedSeq* _cost_per_byte_ms_seq;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	234 TruncatedSeq* _constant_other_time_ms_seq;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	235 TruncatedSeq* _young_other_cost_per_region_ms_seq;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	236 TruncatedSeq* _non_young_other_cost_per_region_ms_seq;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	237
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	238 TruncatedSeq* _pending_cards_seq;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	239 TruncatedSeq* _rs_lengths_seq;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	240
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	241 TruncatedSeq* _cost_per_byte_ms_during_cm_seq;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	242
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	243 G1YoungGenSizer* _young_gen_sizer;
3920 af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	244
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	245 uint _eden_cset_region_length;
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	246 uint _survivor_cset_region_length;
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	247 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	248
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	249 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	250 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	251
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	252 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	253 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	254 uint old_cset_region_length() { return _old_cset_region_length; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	255
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	256 uint _free_regions_at_end_of_collection;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	257
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	258 size_t _recorded_rs_lengths;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	259 size_t _max_rs_lengths;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	260 double _sigma;
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 _rs_lengths_prediction;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	263
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	264 double sigma() { return _sigma; }
342 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 // 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	267 // 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	268 // 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	269 // 2.0 at 1 sample to 1.0 at 5.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	270 double confidence_factor(int samples) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	271 if (samples > 4) return 1.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	272 else return 1.0 + sigma() * ((double)(5 - samples))/2.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	273 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	274
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	275 double get_new_neg_prediction(TruncatedSeq* seq) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	276 return seq->davg() - sigma() * seq->dsd();
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 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	280 bool verify_young_ages(HeapRegion* head, SurvRateGroup *surv_rate_group);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	281 #endif // PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	282
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 942 diff changeset	283 void adjust_concurrent_refinement(double update_rs_time,
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 942 diff changeset	284 double update_rs_processed_buffers,
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 942 diff changeset	285 double goal_ms);
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 942 diff changeset	286
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	287 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	288 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	289
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	290 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	291
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	292 size_t _pending_cards;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	293
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	294 public:
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	295 // Accessors
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	296
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4023 diff changeset	297 void set_region_eden(HeapRegion* hr, int young_index_in_cset) {
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4023 diff changeset	298 hr->set_young();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	299 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	300 hr->set_young_index_in_cset(young_index_in_cset);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	301 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	302
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4023 diff changeset	303 void set_region_survivor(HeapRegion* hr, int young_index_in_cset) {
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4023 diff changeset	304 assert(hr->is_young() && hr->is_survivor(), "pre-condition");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	305 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	306 hr->set_young_index_in_cset(young_index_in_cset);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	307 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	308
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	309 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	310 bool verify_young_ages();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	311 #endif // PRODUCT
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 double get_new_prediction(TruncatedSeq* seq) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	314 return MAX2(seq->davg() + sigma() * seq->dsd(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	315 seq->davg() * confidence_factor(seq->num()));
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	318 void record_max_rs_lengths(size_t rs_lengths) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	319 _max_rs_lengths = rs_lengths;
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 size_t predict_rs_length_diff() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	323 return (size_t) get_new_prediction(_rs_length_diff_seq);
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 double predict_alloc_rate_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	327 return get_new_prediction(_alloc_rate_ms_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_cost_per_card_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	331 return get_new_prediction(_cost_per_card_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_rs_update_time_ms(size_t pending_cards) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	335 return (double) pending_cards * predict_cost_per_card_ms();
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
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	338 double predict_young_cards_per_entry_ratio() {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	339 return get_new_prediction(_young_cards_per_entry_ratio_seq);
342 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_mixed_cards_per_entry_ratio() {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	343 if (_mixed_cards_per_entry_ratio_seq->num() < 2) {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	344 return predict_young_cards_per_entry_ratio();
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	345 } else {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	346 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	347 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	348 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	349
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	350 size_t predict_young_card_num(size_t rs_length) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	351 return (size_t) ((double) rs_length *
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	352 predict_young_cards_per_entry_ratio());
342 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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	355 size_t predict_non_young_card_num(size_t rs_length) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	356 return (size_t) ((double) rs_length *
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	357 predict_mixed_cards_per_entry_ratio());
342 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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	360 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	361 if (gcs_are_young()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	362 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	363 } else {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	364 return predict_mixed_rs_scan_time_ms(card_num);
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	365 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	366 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	367
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	368 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	369 if (_mixed_cost_per_entry_ms_seq->num() < 3) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	370 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	371 } else {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	372 return (double) (card_num *
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	373 get_new_prediction(_mixed_cost_per_entry_ms_seq));
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	374 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	375 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	376
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	377 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	378 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	379 return (1.1 * (double) bytes_to_copy) *
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	380 get_new_prediction(_cost_per_byte_ms_seq);
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	381 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	382 return (double) bytes_to_copy *
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	383 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	384 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	385 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	386
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	387 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	388 if (_in_marking_window && !_in_marking_window_im) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	389 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	390 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	391 return (double) bytes_to_copy *
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	392 get_new_prediction(_cost_per_byte_ms_seq);
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	393 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	394 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	395
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	396 double predict_constant_other_time_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	397 return get_new_prediction(_constant_other_time_ms_seq);
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_young_other_time_ms(size_t young_num) {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	401 return (double) young_num *
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	402 get_new_prediction(_young_other_cost_per_region_ms_seq);
342 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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	405 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	406 return (double) non_young_num *
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	407 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	408 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	409
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	410 double predict_base_elapsed_time_ms(size_t pending_cards);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	411 double predict_base_elapsed_time_ms(size_t pending_cards,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	412 size_t scanned_cards);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	413 size_t predict_bytes_to_copy(HeapRegion* hr);
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6220 diff changeset	414 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	415
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4023 diff changeset	416 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	417
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	418 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	419 old_cset_region_length(); }
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	420 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	421 survivor_cset_region_length(); }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	422
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	423 double predict_survivor_regions_evac_time();
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	424
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	425 void cset_regions_freed() {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	426 bool propagate = _last_gc_was_young && !_in_marking_window;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	427 _short_lived_surv_rate_group->all_surviving_words_recorded(propagate);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	428 _survivor_surv_rate_group->all_surviving_words_recorded(propagate);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	429 // also call it on any more surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	430 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	431
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	432 G1MMUTracker* mmu_tracker() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	433 return _mmu_tracker;
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
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	436 double max_pause_time_ms() {
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	437 return _mmu_tracker->max_gc_time() * 1000.0;
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	438 }
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	439
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	440 double predict_remark_time_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	441 return get_new_prediction(_concurrent_mark_remark_times_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	442 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	443
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	444 double predict_cleanup_time_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	445 return get_new_prediction(_concurrent_mark_cleanup_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 // 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	449 // "yg_age".
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	450 double predict_yg_surv_rate(int age, SurvRateGroup* surv_rate_group) {
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	451 TruncatedSeq* seq = surv_rate_group->get_seq(age);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	452 if (seq->num() == 0)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	453 gclog_or_tty->print("BARF! age is %d", age);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	454 guarantee( seq->num() > 0, "invariant" );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	455 double pred = get_new_prediction(seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	456 if (pred > 1.0)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	457 pred = 1.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	458 return pred;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	459 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	460
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	461 double predict_yg_surv_rate(int age) {
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	462 return predict_yg_surv_rate(age, _short_lived_surv_rate_group);
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	463 }
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	464
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	465 double accum_yg_surv_rate_pred(int age) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	466 return _short_lived_surv_rate_group->accum_surv_rate_pred(age);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	467 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	468
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3980 diff changeset	469 private:
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	470 // Statistics kept per GC stoppage, pause or full.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	471 TruncatedSeq* _recent_prev_end_times_for_all_gcs_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	472
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	473 // 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	474 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	475
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	476 // 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	477 // 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	478 // set at the start of the pause.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	479 HeapRegion* _collection_set;
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	480
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	481 // 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	482 // the incrementally built collection set at the start of an evacuation
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6220 diff changeset	483 // pause, and incremented in finalize_cset() when adding old regions
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6220 diff changeset	484 // (if any) to the collection set.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	485 size_t _collection_set_bytes_used_before;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	486
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6220 diff changeset	487 // The number of bytes copied during the GC.
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6220 diff changeset	488 size_t _bytes_copied_during_gc;
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6220 diff changeset	489
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	490 // 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	491 // 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	492 // 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	493
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	494 enum CSetBuildType {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	495 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	496 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	497 };
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	498
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	499 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	500
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	501 // 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	502 HeapRegion* _inc_cset_head;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	503
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	504 // 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	505 HeapRegion* _inc_cset_tail;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	506
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	507 // 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	508 // 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	509 // an evacuation pause.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	510 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	511
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	512 // 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	513 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	514
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	515 // 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	516 // 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	517 // 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	518 // 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	519 // 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	520 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	521
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	522 // 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	523 // 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	524 // 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	525 // 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	526 // _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	527 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	528
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	529 // 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	530 // 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	531 // 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	532 // MT-safety assumptions.
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	533 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	534
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	535 // 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	536 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	537
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	538 // Stash a pointer to the g1 heap.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	539 G1CollectedHeap* _g1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	540
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	541 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	542
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	543 // 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	544 double _recent_avg_pause_time_ratio;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	545
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	546 double recent_avg_pause_time_ratio() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	547 return _recent_avg_pause_time_ratio;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	548 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	549
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	550 // 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	551 // 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	552 // 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	553 // 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	554 // 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	555 // 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	556 // 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	557 // work.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	558 volatile bool _initiate_conc_mark_if_possible;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	559
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	560 // 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	561 // 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	562 // 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	563 // 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	564 // previous marking cycle (e.g., clearing the next marking
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	565 // 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	566 // 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	567 // 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	568 // 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	569 // 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	570 // 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	571 // 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	572 // initial-mark work.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	573 volatile bool _during_initial_mark_pause;
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	574
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	575 bool _last_young_gc;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	576
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	577 // This set of variables tracks the collector efficiency, in order to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	578 // determine whether we should initiate a new marking.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	579 double _cur_mark_stop_world_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	580 double _mark_remark_start_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	581 double _mark_cleanup_start_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	582
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	583 // 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	584 // 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	585 // 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	586 // 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	587 // 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	588 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	589
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	590 // 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	591 // 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	592 // to the user's inputs.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	593 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	594
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	595 // 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	596 // 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	597 // to the user's inputs.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	598 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	599
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	600 // 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	601 // 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	602 // 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	603 // 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	604 // 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	605 // 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	606 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	607 uint base_min_length,
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	608 uint desired_min_length,
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	609 uint desired_max_length);
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	610
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	611 // 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	612 // 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	613 // 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	614 // 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	615 // calculate_young_list_target_length().
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	616 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	617 uint base_free_regions, double target_pause_time_ms);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	618
8681 27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 7449 diff changeset	619 // 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	620 // during a mixed GC.
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 7449 diff changeset	621 uint calc_min_old_cset_length();
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 7449 diff changeset	622
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 7449 diff changeset	623 // 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	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_max_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 // 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	628 // 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	629 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	630
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	631 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	632
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	633 G1CollectorPolicy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	634
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	635 virtual G1CollectorPolicy* as_g1_policy() { return this; }
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 virtual CollectorPolicy::Name kind() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	638 return CollectorPolicy::G1CollectorPolicyKind;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	639 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	640
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	641 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	642
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	643 // 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	644 // 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	645 // 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	646 void revise_young_list_target_length_if_necessary();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	647
3920 af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	648 // 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	649 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	650
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3980 diff changeset	651 void init();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	652
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	653 // Create jstat counters for the policy.
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	654 virtual void initialize_gc_policy_counters();
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	655
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	656 virtual HeapWord* mem_allocate_work(size_t size,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	657 bool is_tlab,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	658 bool* gc_overhead_limit_was_exceeded);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	659
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	660 // This method controls how a collector handles one or more
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	661 // of its generations being fully allocated.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	662 virtual HeapWord* satisfy_failed_allocation(size_t size,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	663 bool is_tlab);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	664
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	665 BarrierSet::Name barrier_set_name() { return BarrierSet::G1SATBCTLogging; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	666
4834 6a78aa6ac1ff 7132311: G1: assert((s == klass->oop_size(this)) \|\| (Universe::heap()->is_gc_active() && ((is_typeArray()... brutisso parents: 4829 diff changeset	667 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	668
10098 71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	669 // 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	670 void record_collection_pause_start(double start_time_sec);
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10291 diff changeset	671 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	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 a full collection.
71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	674 void record_full_collection_start();
71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	675 void record_full_collection_end();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	676
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	677 // 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	678 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	679
10098 71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	680 // Record start and end of remark.
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3980 diff changeset	681 void record_concurrent_mark_remark_start();
074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3980 diff changeset	682 void record_concurrent_mark_remark_end();
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, end, and completion of cleanup.
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3980 diff changeset	685 void record_concurrent_mark_cleanup_start();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	686 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	687 void record_concurrent_mark_cleanup_completed();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	688
10098 71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	689 // 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	690 // 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	691 void record_heap_size_info_at_start(bool full);
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 // 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	694 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	695 void print_detailed_heap_transition(bool full = false);
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 void record_stop_world_start();
71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	698 void record_concurrent_pause();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	699
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	700 // 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	701 // 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	702 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	703 _bytes_copied_during_gc += bytes;
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	704 }
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	705
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	706 // 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	707 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	708 return _bytes_copied_during_gc;
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	709 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	710
5972 9a9bb0010c91 7156764: Remove unused size parameter from some CollectedHeap methods brutisso parents: 4912 diff changeset	711 // Determine whether there are candidate regions so that the
9a9bb0010c91 7156764: Remove unused size parameter from some CollectedHeap methods brutisso parents: 4912 diff changeset	712 // 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	713 // 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	714 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	715 const char* false_action_str);
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	716
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	717 // Choose a new collection set. Marks the chosen regions as being
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	718 // "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	719 // the collection set are available via access methods.
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10291 diff changeset	720 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	721
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	722 // 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	723 // current collection set.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	724 HeapRegion* collection_set() { return _collection_set; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	725
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	726 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	727
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4023 diff changeset	728 // 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	729 void add_old_region_to_cset(HeapRegion* hr);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	730
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	731 // Incremental CSet Support
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	732
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	733 // 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	734 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	735
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	736 // 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	737 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	738
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	739 // 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	740 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	741
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	742 // 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	743 // before we can use them.
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	744 void finalize_incremental_cset_building();
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	745
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	746 void clear_incremental_cset() {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	747 _inc_cset_head = NULL;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	748 _inc_cset_tail = NULL;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	749 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	750
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	751 // 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	752 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	753
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	754 // 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	755 // 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	756 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	757
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	758 // 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	759 // 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	760 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	761
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	762 private:
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	763 // 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	764 // (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	765 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	766
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	767 public:
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	768 // 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	769 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	770
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	771 // 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	772 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	773
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	774 #ifndef PRODUCT
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	775 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	776 #endif // !PRODUCT
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1359 diff changeset	777
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	778 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	779 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	780 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	781
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	782 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	783 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	784 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	785
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	786 // 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	787 // 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	788 // 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	789 // 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	790 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	791
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	792 // 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	793 // 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	794 // 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	795 // 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	796 // 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	797 // the initial-mark work and start a marking cycle.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	798 void decide_on_conc_mark_initiation();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	799
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	800 // If an expansion would be appropriate, because recent GC overhead had
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	801 // exceeded the desired limit, return an amount to expand by.
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3980 diff changeset	802 size_t expansion_amount();
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 // Print tracing information.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	805 void print_tracing_info() const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	806
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	807 // Print stats on young survival ratio
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	808 void print_yg_surv_rate_info() const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	809
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	810 void finished_recalculating_age_indexes(bool is_survivors) {
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	811 if (is_survivors) {
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	812 _survivor_surv_rate_group->finished_recalculating_age_indexes();
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	813 } else {
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	814 _short_lived_surv_rate_group->finished_recalculating_age_indexes();
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	815 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	816 // do that for any other surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	817 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	818
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	819 bool is_young_list_full() {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	820 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	821 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	822 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	823 }
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	824
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	825 bool can_expand_young_list() {
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_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	828 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	829 }
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	830
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	831 uint young_list_max_length() {
3980 8229bd737950 7075646: G1: fix inconsistencies in the monitoring data tonyp parents: 3979 diff changeset	832 return _young_list_max_length;
8229bd737950 7075646: G1: fix inconsistencies in the monitoring data tonyp parents: 3979 diff changeset	833 }
8229bd737950 7075646: G1: fix inconsistencies in the monitoring data tonyp parents: 3979 diff changeset	834
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	835 bool gcs_are_young() {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	836 return _gcs_are_young;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	837 }
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	838 void set_gcs_are_young(bool gcs_are_young) {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4097 diff changeset	839 _gcs_are_young = gcs_are_young;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	840 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	841
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	842 bool adaptive_young_list_length() {
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4727 diff changeset	843 return _young_gen_sizer->adaptive_young_list_length();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	844 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	845
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3980 diff changeset	846 private:
342 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 // Survivor regions policy.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	849 //
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 // Current tenuring threshold, set to 0 if the collector reaches the
6818 22b8d3d181d9 8000351: Tenuring threshold should be unsigned jwilhelm parents: 6725 diff changeset	852 // maximum amount of survivors regions.
22b8d3d181d9 8000351: Tenuring threshold should be unsigned jwilhelm parents: 6725 diff changeset	853 uint _tenuring_threshold;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	854
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	855 // 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	856 uint _max_survivor_regions;
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	857
3764 053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	858 // 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	859 // 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	860 // 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	861
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10098 diff changeset	862 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	863 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	864 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	865 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	866
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10098 diff changeset	867 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	868 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	869
6818 22b8d3d181d9 8000351: Tenuring threshold should be unsigned jwilhelm parents: 6725 diff changeset	870 // 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	871 uint _recorded_survivor_regions;
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	872 // List of survivor regions.
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	873 HeapRegion* _recorded_survivor_head;
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	874 HeapRegion* _recorded_survivor_tail;
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	875
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	876 ageTable _survivors_age_table;
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	877
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	878 public:
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10291 diff changeset	879 uint tenuring_threshold() const { return _tenuring_threshold; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	880
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	881 inline GCAllocPurpose
6818 22b8d3d181d9 8000351: Tenuring threshold should be unsigned jwilhelm parents: 6725 diff changeset	882 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	883 if (age < _tenuring_threshold && src_region->is_young()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	884 return GCAllocForSurvived;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	885 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	886 return GCAllocForTenured;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	887 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	888 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	889
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	890 inline bool track_object_age(GCAllocPurpose purpose) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	891 return purpose == GCAllocForSurvived;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	892 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	893
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	894 static const uint REGIONS_UNLIMITED = (uint) -1;
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	895
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	896 uint max_regions(int purpose);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	897
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	898 // The limit on regions for a particular purpose is reached.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	899 void note_alloc_region_limit_reached(int purpose) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	900 if (purpose == GCAllocForSurvived) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	901 _tenuring_threshold = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	902 }
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	905 void note_start_adding_survivor_regions() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	906 _survivor_surv_rate_group->start_adding_regions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	907 }
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 void note_stop_adding_survivor_regions() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	910 _survivor_surv_rate_group->stop_adding_regions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	911 }
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	912
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	913 void record_survivor_regions(uint regions,
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	914 HeapRegion* head,
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	915 HeapRegion* tail) {
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	916 _recorded_survivor_regions = regions;
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	917 _recorded_survivor_head = head;
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	918 _recorded_survivor_tail = tail;
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	919 }
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	920
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	921 uint recorded_survivor_regions() {
838 0316eac49d5a 6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set tonyp parents: 794 diff changeset	922 return _recorded_survivor_regions;
0316eac49d5a 6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set tonyp parents: 794 diff changeset	923 }
0316eac49d5a 6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set tonyp parents: 794 diff changeset	924
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 5988 diff changeset	925 void record_thread_age_table(ageTable* age_table) {
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	926 _survivors_age_table.merge_par(age_table);
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	927 }
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	928
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	929 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	930
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	931 // Calculates survivor space parameters.
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	932 void update_survivors_policy();
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 342 diff changeset	933
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	934 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	935
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	936 // This should move to some place more general...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	937
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	938 // 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	939 // "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	940 // sequence.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	941 inline double variance(int n, double sum_of_squares, double sum) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	942 double n_d = (double)n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	943 double avg = sum/n_d;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	944 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	945 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	946
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1707 diff changeset	947 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTORPOLICY_HPP

Mercurial > hg > graal-compiler

annotate src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp @ 13059:46d7652b223c