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

annotate src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp @ 20211:82693fb204a5

8038930: G1CodeRootSet::test fails with assert(_num_chunks_handed_out == 0) failed: No elements must have been handed out yet Summary: The test incorrectly assumed that it had been started with no other previous compilation activity. Fix this by allowing multiple code root free chunk lists, and use one separate from the global one to perform the test. Reviewed-by: brutisso

author	tschatzl
date	Wed, 16 Apr 2014 10:14:50 +0200
parents	78bbf4d43a14
children	52b4284cb496 5d7a63aee595

rev	line source
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1 /*
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17866 diff changeset	2 * Copyright (c) 2001, 2014, 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
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17866 diff changeset	25 #ifndef __clang_major__
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17866 diff changeset	26 #define ATTRIBUTE_PRINTF(x,y) // FIXME, formats are a mess.
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17866 diff changeset	27 #endif
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17866 diff changeset	28
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	29 #include "precompiled.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	30 #include "gc_implementation/g1/concurrentG1Refine.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	31 #include "gc_implementation/g1/concurrentMark.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	32 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	33 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	34 #include "gc_implementation/g1/g1CollectorPolicy.hpp"
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	35 #include "gc_implementation/g1/g1ErgoVerbose.hpp"
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	36 #include "gc_implementation/g1/g1GCPhaseTimes.hpp"
6007 5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging brutisso parents: 5988 diff changeset	37 #include "gc_implementation/g1/g1Log.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	38 #include "gc_implementation/g1/heapRegionRemSet.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	39 #include "gc_implementation/shared/gcPolicyCounters.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	40 #include "runtime/arguments.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	41 #include "runtime/java.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	42 #include "runtime/mutexLocker.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	43 #include "utilities/debug.hpp"
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	44
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	45 // Different defaults for different number of GC threads
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	46 // They were chosen by running GCOld and SPECjbb on debris with different
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	47 // numbers of GC threads and choosing them based on the results
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	48
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	49 // all the same
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	50 static double rs_length_diff_defaults[] = {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	51 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	52 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	53
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	54 static double cost_per_card_ms_defaults[] = {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	55 0.01, 0.005, 0.005, 0.003, 0.003, 0.002, 0.002, 0.0015
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	56 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	57
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	58 // all the same
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	59 static double young_cards_per_entry_ratio_defaults[] = {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	60 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	61 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	62
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	63 static double cost_per_entry_ms_defaults[] = {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	64 0.015, 0.01, 0.01, 0.008, 0.008, 0.0055, 0.0055, 0.005
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	65 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	66
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	67 static double cost_per_byte_ms_defaults[] = {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	68 0.00006, 0.00003, 0.00003, 0.000015, 0.000015, 0.00001, 0.00001, 0.000009
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	69 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	70
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	71 // these should be pretty consistent
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	72 static double constant_other_time_ms_defaults[] = {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	73 5.0, 5.0, 5.0, 5.0, 5.0, 5.0, 5.0, 5.0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	74 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	75
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 static double young_other_cost_per_region_ms_defaults[] = {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	78 0.3, 0.2, 0.2, 0.15, 0.15, 0.12, 0.12, 0.1
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	79 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	80
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	81 static double non_young_other_cost_per_region_ms_defaults[] = {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	82 1.0, 0.7, 0.7, 0.5, 0.5, 0.42, 0.42, 0.30
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	83 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	84
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	85 G1CollectorPolicy::G1CollectorPolicy() :
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1779 diff changeset	86 _parallel_gc_threads(G1CollectedHeap::use_parallel_gc_threads()
3823 14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	87 ? ParallelGCThreads : 1),
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1779 diff changeset	88
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	89 _recent_gc_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	90 _stop_world_start(0.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	91
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	92 _concurrent_mark_remark_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	93 _concurrent_mark_cleanup_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	94
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	95 _alloc_rate_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	96 _prev_collection_pause_end_ms(0.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	97 _rs_length_diff_seq(new TruncatedSeq(TruncatedSeqLength)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	98 _cost_per_card_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	99 _young_cards_per_entry_ratio_seq(new TruncatedSeq(TruncatedSeqLength)),
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	100 _mixed_cards_per_entry_ratio_seq(new TruncatedSeq(TruncatedSeqLength)),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	101 _cost_per_entry_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	102 _mixed_cost_per_entry_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	103 _cost_per_byte_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	104 _cost_per_byte_ms_during_cm_seq(new TruncatedSeq(TruncatedSeqLength)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	105 _constant_other_time_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	106 _young_other_cost_per_region_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	107 _non_young_other_cost_per_region_ms_seq(
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	108 new TruncatedSeq(TruncatedSeqLength)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	109
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	110 _pending_cards_seq(new TruncatedSeq(TruncatedSeqLength)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	111 _rs_lengths_seq(new TruncatedSeq(TruncatedSeqLength)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	112
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 677 diff changeset	113 _pause_time_target_ms((double) MaxGCPauseMillis),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	114
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	115 _gcs_are_young(true),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	116
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	117 _during_marking(false),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	118 _in_marking_window(false),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	119 _in_marking_window_im(false),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	120
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	121 _recent_prev_end_times_for_all_gcs_sec(
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	122 new TruncatedSeq(NumPrevPausesForHeuristics)),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	123
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	124 _recent_avg_pause_time_ratio(0.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	125
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	126 _initiate_conc_mark_if_possible(false),
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	127 _during_initial_mark_pause(false),
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	128 _last_young_gc(false),
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	129 _last_gc_was_young(false),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	130
10291 48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	131 _eden_used_bytes_before_gc(0),
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	132 _survivor_used_bytes_before_gc(0),
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	133 _heap_used_bytes_before_gc(0),
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	134 _metaspace_used_bytes_before_gc(0),
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	135 _eden_capacity_bytes_before_gc(0),
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	136 _heap_capacity_bytes_before_gc(0),
3764 053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	137
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	138 _eden_cset_region_length(0),
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	139 _survivor_cset_region_length(0),
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	140 _old_cset_region_length(0),
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	141
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	142 _collection_set(NULL),
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	143 _collection_set_bytes_used_before(0),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	144
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	145 // Incremental CSet attributes
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	146 _inc_cset_build_state(Inactive),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	147 _inc_cset_head(NULL),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	148 _inc_cset_tail(NULL),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	149 _inc_cset_bytes_used_before(0),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	150 _inc_cset_max_finger(NULL),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	151 _inc_cset_recorded_rs_lengths(0),
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	152 _inc_cset_recorded_rs_lengths_diffs(0),
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	153 _inc_cset_predicted_elapsed_time_ms(0.0),
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	154 _inc_cset_predicted_elapsed_time_ms_diffs(0.0),
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	155
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	156 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	157 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	158 #endif // _MSC_VER
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	159
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	160 _short_lived_surv_rate_group(new SurvRateGroup(this, "Short Lived",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	161 G1YoungSurvRateNumRegionsSummary)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	162 _survivor_surv_rate_group(new SurvRateGroup(this, "Survivor",
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	163 G1YoungSurvRateNumRegionsSummary)),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	164 // add here any more surv rate groups
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	165 _recorded_survivor_regions(0),
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	166 _recorded_survivor_head(NULL),
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	167 _recorded_survivor_tail(NULL),
1356 56507bcd639e 6937160: G1: should observe GCTimeRatio tonyp parents: 1285 diff changeset	168 _survivors_age_table(true),
56507bcd639e 6937160: G1: should observe GCTimeRatio tonyp parents: 1285 diff changeset	169
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	170 _gc_overhead_perc(0.0) {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	171
942 2c79770d1f6e 6819085: G1: use larger and/or user settable region size tonyp parents: 936 diff changeset	172 // Set up the region size and associated fields. Given that the
2c79770d1f6e 6819085: G1: use larger and/or user settable region size tonyp parents: 936 diff changeset	173 // policy is created before the heap, we have to set this up here,
2c79770d1f6e 6819085: G1: use larger and/or user settable region size tonyp parents: 936 diff changeset	174 // so it's done as soon as possible.
12178 84683e78e713 8019902: G1: Use the average heap size rather than the minimum heap size to calculate the region size brutisso parents: 12110 diff changeset	175
84683e78e713 8019902: G1: Use the average heap size rather than the minimum heap size to calculate the region size brutisso parents: 12110 diff changeset	176 // It would have been natural to pass initial_heap_byte_size() and
84683e78e713 8019902: G1: Use the average heap size rather than the minimum heap size to calculate the region size brutisso parents: 12110 diff changeset	177 // max_heap_byte_size() to setup_heap_region_size() but those have
84683e78e713 8019902: G1: Use the average heap size rather than the minimum heap size to calculate the region size brutisso parents: 12110 diff changeset	178 // not been set up at this point since they should be aligned with
84683e78e713 8019902: G1: Use the average heap size rather than the minimum heap size to calculate the region size brutisso parents: 12110 diff changeset	179 // the region size. So, there is a circular dependency here. We base
84683e78e713 8019902: G1: Use the average heap size rather than the minimum heap size to calculate the region size brutisso parents: 12110 diff changeset	180 // the region size on the heap size, but the heap size should be
84683e78e713 8019902: G1: Use the average heap size rather than the minimum heap size to calculate the region size brutisso parents: 12110 diff changeset	181 // aligned with the region size. To get around this we use the
84683e78e713 8019902: G1: Use the average heap size rather than the minimum heap size to calculate the region size brutisso parents: 12110 diff changeset	182 // unaligned values for the heap.
84683e78e713 8019902: G1: Use the average heap size rather than the minimum heap size to calculate the region size brutisso parents: 12110 diff changeset	183 HeapRegion::setup_heap_region_size(InitialHeapSize, MaxHeapSize);
1261 0414c1049f15 6923991: G1: improve scalability of RSet scanning iveresov parents: 1111 diff changeset	184 HeapRegionRemSet::setup_remset_size();
942 2c79770d1f6e 6819085: G1: use larger and/or user settable region size tonyp parents: 936 diff changeset	185
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	186 G1ErgoVerbose::initialize();
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	187 if (PrintAdaptiveSizePolicy) {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	188 // Currently, we only use a single switch for all the heuristics.
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	189 G1ErgoVerbose::set_enabled(true);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	190 // Given that we don't currently have a verboseness level
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	191 // parameter, we'll hardcode this to high. This can be easily
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	192 // changed in the future.
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	193 G1ErgoVerbose::set_level(ErgoHigh);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	194 } else {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	195 G1ErgoVerbose::set_enabled(false);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	196 }
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	197
1391 79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1388 diff changeset	198 // Verify PLAB sizes
3986 65a8ff39a6da 7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t johnc parents: 3982 diff changeset	199 const size_t region_size = HeapRegion::GrainWords;
1391 79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1388 diff changeset	200 if (YoungPLABSize > region_size \|\| OldPLABSize > region_size) {
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1388 diff changeset	201 char buffer[128];
3986 65a8ff39a6da 7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t johnc parents: 3982 diff changeset	202 jio_snprintf(buffer, sizeof(buffer), "%sPLABSize should be at most "SIZE_FORMAT,
1391 79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1388 diff changeset	203 OldPLABSize > region_size ? "Old" : "Young", region_size);
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1388 diff changeset	204 vm_exit_during_initialization(buffer);
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1388 diff changeset	205 }
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1388 diff changeset	206
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	207 _recent_prev_end_times_for_all_gcs_sec->add(os::elapsedTime());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	208 _prev_collection_pause_end_ms = os::elapsedTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	209
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	210 _phase_times = new G1GCPhaseTimes(_parallel_gc_threads);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	211
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	212 int index = MIN2(_parallel_gc_threads - 1, 7);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	213
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	214 _rs_length_diff_seq->add(rs_length_diff_defaults[index]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	215 _cost_per_card_ms_seq->add(cost_per_card_ms_defaults[index]);
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	216 _young_cards_per_entry_ratio_seq->add(
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	217 young_cards_per_entry_ratio_defaults[index]);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	218 _cost_per_entry_ms_seq->add(cost_per_entry_ms_defaults[index]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	219 _cost_per_byte_ms_seq->add(cost_per_byte_ms_defaults[index]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	220 _constant_other_time_ms_seq->add(constant_other_time_ms_defaults[index]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	221 _young_other_cost_per_region_ms_seq->add(
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	222 young_other_cost_per_region_ms_defaults[index]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	223 _non_young_other_cost_per_region_ms_seq->add(
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	224 non_young_other_cost_per_region_ms_defaults[index]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	225
1610 79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	226 // Below, we might need to calculate the pause time target based on
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	227 // the pause interval. When we do so we are going to give G1 maximum
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	228 // flexibility and allow it to do pauses when it needs to. So, we'll
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	229 // arrange that the pause interval to be pause time target + 1 to
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	230 // ensure that a) the pause time target is maximized with respect to
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	231 // the pause interval and b) we maintain the invariant that pause
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	232 // time target < pause interval. If the user does not want this
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	233 // maximum flexibility, they will have to set the pause interval
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	234 // explicitly.
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	235
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	236 // First make sure that, if either parameter is set, its value is
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	237 // reasonable.
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	238 if (!FLAG_IS_DEFAULT(MaxGCPauseMillis)) {
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	239 if (MaxGCPauseMillis < 1) {
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	240 vm_exit_during_initialization("MaxGCPauseMillis should be "
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	241 "greater than 0");
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	242 }
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	243 }
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	244 if (!FLAG_IS_DEFAULT(GCPauseIntervalMillis)) {
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	245 if (GCPauseIntervalMillis < 1) {
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	246 vm_exit_during_initialization("GCPauseIntervalMillis should be "
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	247 "greater than 0");
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	248 }
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	249 }
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	250
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	251 // Then, if the pause time target parameter was not set, set it to
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	252 // the default value.
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	253 if (FLAG_IS_DEFAULT(MaxGCPauseMillis)) {
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	254 if (FLAG_IS_DEFAULT(GCPauseIntervalMillis)) {
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	255 // The default pause time target in G1 is 200ms
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	256 FLAG_SET_DEFAULT(MaxGCPauseMillis, 200);
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	257 } else {
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	258 // We do not allow the pause interval to be set without the
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	259 // pause time target
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	260 vm_exit_during_initialization("GCPauseIntervalMillis cannot be set "
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	261 "without setting MaxGCPauseMillis");
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	262 }
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	263 }
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	264
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	265 // Then, if the interval parameter was not set, set it according to
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	266 // the pause time target (this will also deal with the case when the
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	267 // pause time target is the default value).
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	268 if (FLAG_IS_DEFAULT(GCPauseIntervalMillis)) {
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	269 FLAG_SET_DEFAULT(GCPauseIntervalMillis, MaxGCPauseMillis + 1);
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	270 }
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	271
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	272 // Finally, make sure that the two parameters are consistent.
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	273 if (MaxGCPauseMillis >= GCPauseIntervalMillis) {
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	274 char buffer[256];
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	275 jio_snprintf(buffer, 256,
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	276 "MaxGCPauseMillis (%u) should be less than "
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	277 "GCPauseIntervalMillis (%u)",
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	278 MaxGCPauseMillis, GCPauseIntervalMillis);
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	279 vm_exit_during_initialization(buffer);
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	280 }
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	281
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 677 diff changeset	282 double max_gc_time = (double) MaxGCPauseMillis / 1000.0;
1610 79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent tonyp parents: 1579 diff changeset	283 double time_slice = (double) GCPauseIntervalMillis / 1000.0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	284 _mmu_tracker = new G1MMUTrackerQueue(time_slice, max_gc_time);
8094 f1fb03a251e9 8008546: Wrong G1ConfidencePercent results in GUARANTEE(VARIANCE() > -1.0) FAILED poonam parents: 7449 diff changeset	285
f1fb03a251e9 8008546: Wrong G1ConfidencePercent results in GUARANTEE(VARIANCE() > -1.0) FAILED poonam parents: 7449 diff changeset	286 uintx confidence_perc = G1ConfidencePercent;
f1fb03a251e9 8008546: Wrong G1ConfidencePercent results in GUARANTEE(VARIANCE() > -1.0) FAILED poonam parents: 7449 diff changeset	287 // Put an artificial ceiling on this so that it's not set to a silly value.
f1fb03a251e9 8008546: Wrong G1ConfidencePercent results in GUARANTEE(VARIANCE() > -1.0) FAILED poonam parents: 7449 diff changeset	288 if (confidence_perc > 100) {
f1fb03a251e9 8008546: Wrong G1ConfidencePercent results in GUARANTEE(VARIANCE() > -1.0) FAILED poonam parents: 7449 diff changeset	289 confidence_perc = 100;
f1fb03a251e9 8008546: Wrong G1ConfidencePercent results in GUARANTEE(VARIANCE() > -1.0) FAILED poonam parents: 7449 diff changeset	290 warning("G1ConfidencePercent is set to a value that is too large, "
f1fb03a251e9 8008546: Wrong G1ConfidencePercent results in GUARANTEE(VARIANCE() > -1.0) FAILED poonam parents: 7449 diff changeset	291 "it's been updated to %u", confidence_perc);
f1fb03a251e9 8008546: Wrong G1ConfidencePercent results in GUARANTEE(VARIANCE() > -1.0) FAILED poonam parents: 7449 diff changeset	292 }
f1fb03a251e9 8008546: Wrong G1ConfidencePercent results in GUARANTEE(VARIANCE() > -1.0) FAILED poonam parents: 7449 diff changeset	293 _sigma = (double) confidence_perc / 100.0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	294
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	295 // start conservatively (around 50ms is about right)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	296 _concurrent_mark_remark_times_ms->add(0.05);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	297 _concurrent_mark_cleanup_times_ms->add(0.20);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	298 _tenuring_threshold = MaxTenuringThreshold;
3868 ae73da50be4b 7081064: G1: remove develop params G1FixedSurvivorSpaceSize, G1FixedTenuringThreshold, and G1FixedEdenSize tonyp parents: 3867 diff changeset	299 // _max_survivor_regions will be calculated by
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	300 // update_young_list_target_length() during initialization.
3868 ae73da50be4b 7081064: G1: remove develop params G1FixedSurvivorSpaceSize, G1FixedTenuringThreshold, and G1FixedEdenSize tonyp parents: 3867 diff changeset	301 _max_survivor_regions = 0;
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	302
1356 56507bcd639e 6937160: G1: should observe GCTimeRatio tonyp parents: 1285 diff changeset	303 assert(GCTimeRatio > 0,
56507bcd639e 6937160: G1: should observe GCTimeRatio tonyp parents: 1285 diff changeset	304 "we should have set it to a default value set_g1_gc_flags() "
56507bcd639e 6937160: G1: should observe GCTimeRatio tonyp parents: 1285 diff changeset	305 "if a user set it to 0");
56507bcd639e 6937160: G1: should observe GCTimeRatio tonyp parents: 1285 diff changeset	306 _gc_overhead_perc = 100.0 * (1.0 / (1.0 + GCTimeRatio));
56507bcd639e 6937160: G1: should observe GCTimeRatio tonyp parents: 1285 diff changeset	307
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	308 uintx reserve_perc = G1ReservePercent;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	309 // Put an artificial ceiling on this so that it's not set to a silly value.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	310 if (reserve_perc > 50) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	311 reserve_perc = 50;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	312 warning("G1ReservePercent is set to a value that is too large, "
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	313 "it's been updated to %u", reserve_perc);
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	314 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	315 _reserve_factor = (double) reserve_perc / 100.0;
3920 af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	316 // This will be set when the heap is expanded
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	317 // for the first time during initialization.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	318 _reserve_regions = 0;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	319
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	320 _collectionSetChooser = new CollectionSetChooser();
13060 8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	321 }
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	322
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	323 void G1CollectorPolicy::initialize_alignments() {
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	324 _space_alignment = HeapRegion::GrainBytes;
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	325 size_t card_table_alignment = GenRemSet::max_alignment_constraint(GenRemSet::CardTable);
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	326 size_t page_size = UseLargePages ? os::large_page_size() : os::vm_page_size();
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	327 _heap_alignment = MAX3(card_table_alignment, _space_alignment, page_size);
342 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 void G1CollectorPolicy::initialize_flags() {
13060 8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	331 if (G1HeapRegionSize != HeapRegion::GrainBytes) {
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	332 FLAG_SET_ERGO(uintx, G1HeapRegionSize, HeapRegion::GrainBytes);
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	333 }
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	334
547 1e458753107d 6802413: G1: G1FixedSurvivorSpaceSize should be converted into regions in calculate_survivors_policy() apetrusenko parents: 545 diff changeset	335 if (SurvivorRatio < 1) {
1e458753107d 6802413: G1: G1FixedSurvivorSpaceSize should be converted into regions in calculate_survivors_policy() apetrusenko parents: 545 diff changeset	336 vm_exit_during_initialization("Invalid survivor ratio specified");
1e458753107d 6802413: G1: G1FixedSurvivorSpaceSize should be converted into regions in calculate_survivors_policy() apetrusenko parents: 545 diff changeset	337 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	338 CollectorPolicy::initialize_flags();
13060 8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	339 _young_gen_sizer = new G1YoungGenSizer(); // Must be after call to initialize_flags
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
13060 8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	342 void G1CollectorPolicy::post_heap_initialize() {
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	343 uintx max_regions = G1CollectedHeap::heap()->max_regions();
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	344 size_t max_young_size = (size_t)_young_gen_sizer->max_young_length(max_regions) * HeapRegion::GrainBytes;
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	345 if (max_young_size != MaxNewSize) {
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	346 FLAG_SET_ERGO(uintx, MaxNewSize, max_young_size);
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	347 }
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	348 }
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	349
13060 8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	350 G1YoungGenSizer::G1YoungGenSizer() : _sizer_kind(SizerDefaults), _adaptive_size(true),
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	351 _min_desired_young_length(0), _max_desired_young_length(0) {
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	352 if (FLAG_IS_CMDLINE(NewRatio)) {
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	353 if (FLAG_IS_CMDLINE(NewSize) \|\| FLAG_IS_CMDLINE(MaxNewSize)) {
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	354 warning("-XX:NewSize and -XX:MaxNewSize override -XX:NewRatio");
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	355 } else {
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	356 _sizer_kind = SizerNewRatio;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	357 _adaptive_size = false;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	358 return;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	359 }
3976 d912b598c6c3 7091032: G1: assert failure when NewRatio is used tonyp parents: 3927 diff changeset	360 }
1285 a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size tonyp parents: 1283 diff changeset	361
13060 8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	362 if (NewSize > MaxNewSize) {
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	363 if (FLAG_IS_CMDLINE(MaxNewSize)) {
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	364 warning("NewSize (" SIZE_FORMAT "k) is greater than the MaxNewSize (" SIZE_FORMAT "k). "
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	365 "A new max generation size of " SIZE_FORMAT "k will be used.",
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	366 NewSize/K, MaxNewSize/K, NewSize/K);
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	367 }
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	368 MaxNewSize = NewSize;
12894 24f32d09a0d7 8023643: G1 assert failed when NewSize was specified greater than MaxNewSize jwilhelm parents: 12830 diff changeset	369 }
24f32d09a0d7 8023643: G1 assert failed when NewSize was specified greater than MaxNewSize jwilhelm parents: 12830 diff changeset	370
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	371 if (FLAG_IS_CMDLINE(NewSize)) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	372 _min_desired_young_length = MAX2((uint) (NewSize / HeapRegion::GrainBytes),
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	373 1U);
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	374 if (FLAG_IS_CMDLINE(MaxNewSize)) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	375 _max_desired_young_length =
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	376 MAX2((uint) (MaxNewSize / HeapRegion::GrainBytes),
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	377 1U);
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	378 _sizer_kind = SizerMaxAndNewSize;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	379 _adaptive_size = _min_desired_young_length == _max_desired_young_length;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	380 } else {
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	381 _sizer_kind = SizerNewSizeOnly;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	382 }
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	383 } else if (FLAG_IS_CMDLINE(MaxNewSize)) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	384 _max_desired_young_length =
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	385 MAX2((uint) (MaxNewSize / HeapRegion::GrainBytes),
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	386 1U);
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	387 _sizer_kind = SizerMaxNewSizeOnly;
1285 a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size tonyp parents: 1283 diff changeset	388 }
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	389 }
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	390
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	391 uint G1YoungGenSizer::calculate_default_min_length(uint new_number_of_heap_regions) {
7449 37f7535e5f18 8001424: G1: Rename certain G1-specific flags johnc parents: 6628 diff changeset	392 uint default_value = (new_number_of_heap_regions * G1NewSizePercent) / 100;
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	393 return MAX2(1U, default_value);
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	394 }
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	395
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	396 uint G1YoungGenSizer::calculate_default_max_length(uint new_number_of_heap_regions) {
7449 37f7535e5f18 8001424: G1: Rename certain G1-specific flags johnc parents: 6628 diff changeset	397 uint default_value = (new_number_of_heap_regions * G1MaxNewSizePercent) / 100;
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	398 return MAX2(1U, default_value);
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	399 }
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	400
13060 8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	401 void G1YoungGenSizer::recalculate_min_max_young_length(uint number_of_heap_regions, uint* min_young_length, uint* max_young_length) {
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	402 assert(number_of_heap_regions > 0, "Heap must be initialized");
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	403
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	404 switch (_sizer_kind) {
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	405 case SizerDefaults:
13060 8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	406 *min_young_length = calculate_default_min_length(number_of_heap_regions);
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	407 *max_young_length = calculate_default_max_length(number_of_heap_regions);
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	408 break;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	409 case SizerNewSizeOnly:
13060 8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	410 *max_young_length = calculate_default_max_length(number_of_heap_regions);
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	411 max_young_length = MAX2(min_young_length, *max_young_length);
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	412 break;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	413 case SizerMaxNewSizeOnly:
13060 8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	414 *min_young_length = calculate_default_min_length(number_of_heap_regions);
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	415 min_young_length = MIN2(min_young_length, *max_young_length);
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	416 break;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	417 case SizerMaxAndNewSize:
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	418 // Do nothing. Values set on the command line, don't update them at runtime.
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	419 break;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	420 case SizerNewRatio:
13060 8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	421 *min_young_length = number_of_heap_regions / (NewRatio + 1);
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	422 max_young_length = min_young_length;
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	423 break;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	424 default:
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	425 ShouldNotReachHere();
1285 a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size tonyp parents: 1283 diff changeset	426 }
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	427
13060 8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	428 assert(min_young_length <= max_young_length, "Invalid min/max young gen size values");
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	429 }
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	430
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	431 uint G1YoungGenSizer::max_young_length(uint number_of_heap_regions) {
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	432 // We need to pass the desired values because recalculation may not update these
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	433 // values in some cases.
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	434 uint temp = _min_desired_young_length;
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	435 uint result = _max_desired_young_length;
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	436 recalculate_min_max_young_length(number_of_heap_regions, &temp, &result);
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	437 return result;
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	438 }
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	439
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	440 void G1YoungGenSizer::heap_size_changed(uint new_number_of_heap_regions) {
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	441 recalculate_min_max_young_length(new_number_of_heap_regions, &_min_desired_young_length,
8f07aa079343 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking jwilhelm parents: 13057 diff changeset	442 &_max_desired_young_length);
3920 af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	443 }
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	444
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	445 void G1CollectorPolicy::init() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	446 // Set aside an initial future to_space.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	447 _g1 = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	448
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	449 assert(Heap_lock->owned_by_self(), "Locking discipline.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	450
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	451 initialize_gc_policy_counters();
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	452
3920 af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	453 if (adaptive_young_list_length()) {
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	454 _young_list_fixed_length = 0;
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	455 } else {
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	456 _young_list_fixed_length = _young_gen_sizer->min_desired_young_length();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	457 }
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	458 _free_regions_at_end_of_collection = _g1->free_regions();
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	459 update_young_list_target_length();
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	460
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	461 // We may immediately start allocating regions and placing them on the
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	462 // collection set list. Initialize the per-collection set info
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	463 start_incremental_cset_building();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	464 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	465
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	466 // Create the jstat counters for the policy.
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	467 void G1CollectorPolicy::initialize_gc_policy_counters() {
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	468 _gc_policy_counters = new GCPolicyCounters("GarbageFirst", 1, 3);
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	469 }
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	470
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	471 bool G1CollectorPolicy::predict_will_fit(uint young_length,
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	472 double base_time_ms,
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	473 uint base_free_regions,
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	474 double target_pause_time_ms) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	475 if (young_length >= base_free_regions) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	476 // end condition 1: not enough space for the young regions
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	477 return false;
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	478 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	479
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	480 double accum_surv_rate = accum_yg_surv_rate_pred((int) young_length - 1);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	481 size_t bytes_to_copy =
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	482 (size_t) (accum_surv_rate * (double) HeapRegion::GrainBytes);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	483 double copy_time_ms = predict_object_copy_time_ms(bytes_to_copy);
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	484 double young_other_time_ms = predict_young_other_time_ms(young_length);
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	485 double pause_time_ms = base_time_ms + copy_time_ms + young_other_time_ms;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	486 if (pause_time_ms > target_pause_time_ms) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	487 // end condition 2: prediction is over the target pause time
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	488 return false;
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	489 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	490
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	491 size_t free_bytes =
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	492 (base_free_regions - young_length) * HeapRegion::GrainBytes;
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	493 if ((2.0 * sigma()) * (double) bytes_to_copy > (double) free_bytes) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	494 // end condition 3: out-of-space (conservatively!)
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	495 return false;
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	496 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	497
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	498 // success!
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	499 return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	500 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	501
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	502 void G1CollectorPolicy::record_new_heap_size(uint new_number_of_regions) {
3920 af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	503 // re-calculate the necessary reserve
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	504 double reserve_regions_d = (double) new_number_of_regions * _reserve_factor;
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	505 // We use ceiling so that if reserve_regions_d is > 0.0 (but
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	506 // smaller than 1.0) we'll get 1.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	507 _reserve_regions = (uint) ceil(reserve_regions_d);
3920 af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	508
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	509 _young_gen_sizer->heap_size_changed(new_number_of_regions);
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	510 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	511
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	512 uint G1CollectorPolicy::calculate_young_list_desired_min_length(
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	513 uint base_min_length) {
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	514 uint desired_min_length = 0;
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	515 if (adaptive_young_list_length()) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	516 if (_alloc_rate_ms_seq->num() > 3) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	517 double now_sec = os::elapsedTime();
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	518 double when_ms = _mmu_tracker->when_max_gc_sec(now_sec) * 1000.0;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	519 double alloc_rate_ms = predict_alloc_rate_ms();
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	520 desired_min_length = (uint) ceil(alloc_rate_ms * when_ms);
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	521 } else {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	522 // otherwise we don't have enough info to make the prediction
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	523 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	524 }
3920 af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	525 desired_min_length += base_min_length;
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	526 // make sure we don't go below any user-defined minimum bound
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	527 return MAX2(_young_gen_sizer->min_desired_young_length(), desired_min_length);
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	528 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	529
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	530 uint G1CollectorPolicy::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	531 // Here, we might want to also take into account any additional
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	532 // constraints (i.e., user-defined minimum bound). Currently, we
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	533 // effectively don't set this bound.
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	534 return _young_gen_sizer->max_desired_young_length();
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	535 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	536
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	537 void G1CollectorPolicy::update_young_list_target_length(size_t rs_lengths) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	538 if (rs_lengths == (size_t) -1) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	539 // if it's set to the default value (-1), we should predict it;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	540 // otherwise, use the given value.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	541 rs_lengths = (size_t) get_new_prediction(_rs_lengths_seq);
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	542 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	543
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	544 // Calculate the absolute and desired min bounds.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	545
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	546 // This is how many young regions we already have (currently: the survivors).
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	547 uint base_min_length = recorded_survivor_regions();
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	548 // This is the absolute minimum young length, which ensures that we
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	549 // can allocate one eden region in the worst-case.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	550 uint absolute_min_length = base_min_length + 1;
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	551 uint desired_min_length =
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	552 calculate_young_list_desired_min_length(base_min_length);
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	553 if (desired_min_length < absolute_min_length) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	554 desired_min_length = absolute_min_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	555 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	556
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	557 // Calculate the absolute and desired max bounds.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	558
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	559 // We will try our best not to "eat" into the reserve.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	560 uint absolute_max_length = 0;
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	561 if (_free_regions_at_end_of_collection > _reserve_regions) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	562 absolute_max_length = _free_regions_at_end_of_collection - _reserve_regions;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	563 }
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	564 uint desired_max_length = 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	565 if (desired_max_length > absolute_max_length) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	566 desired_max_length = absolute_max_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	567 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	568
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	569 uint young_list_target_length = 0;
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	570 if (adaptive_young_list_length()) {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	571 if (gcs_are_young()) {
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	572 young_list_target_length =
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	573 calculate_young_list_target_length(rs_lengths,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	574 base_min_length,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	575 desired_min_length,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	576 desired_max_length);
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	577 _rs_lengths_prediction = rs_lengths;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	578 } else {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	579 // Don't calculate anything and let the code below bound it to
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	580 // the desired_min_length, i.e., do the next GC as soon as
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	581 // possible to maximize how many old regions we can add to it.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	582 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	583 } else {
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	584 // The user asked for a fixed young gen so we'll fix the young gen
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	585 // whether the next GC is young or mixed.
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	586 young_list_target_length = _young_list_fixed_length;
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	587 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	588
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	589 // Make sure we don't go over the desired max length, nor under the
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	590 // desired min length. In case they clash, desired_min_length wins
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	591 // which is why that test is second.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	592 if (young_list_target_length > desired_max_length) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	593 young_list_target_length = desired_max_length;
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 if (young_list_target_length < desired_min_length) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	596 young_list_target_length = desired_min_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	597 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	598
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	599 assert(young_list_target_length > recorded_survivor_regions(),
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	600 "we should be able to allocate at least one eden region");
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	601 assert(young_list_target_length >= absolute_min_length, "post-condition");
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	602 _young_list_target_length = young_list_target_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	603
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	604 update_max_gc_locker_expansion();
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	605 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	606
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	607 uint
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	608 G1CollectorPolicy::calculate_young_list_target_length(size_t rs_lengths,
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	609 uint base_min_length,
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	610 uint desired_min_length,
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	611 uint desired_max_length) {
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	612 assert(adaptive_young_list_length(), "pre-condition");
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	613 assert(gcs_are_young(), "only call this for young GCs");
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	614
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	615 // In case some edge-condition makes the desired max length too small...
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	616 if (desired_max_length <= desired_min_length) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	617 return desired_min_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	618 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	619
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	620 // We'll adjust min_young_length and max_young_length not to include
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	621 // the already allocated young regions (i.e., so they reflect the
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	622 // min and max eden regions we'll allocate). The base_min_length
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	623 // will be reflected in the predictions by the
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	624 // survivor_regions_evac_time prediction.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	625 assert(desired_min_length > base_min_length, "invariant");
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	626 uint min_young_length = desired_min_length - base_min_length;
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	627 assert(desired_max_length > base_min_length, "invariant");
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	628 uint max_young_length = desired_max_length - base_min_length;
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	629
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	630 double target_pause_time_ms = _mmu_tracker->max_gc_time() * 1000.0;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	631 double survivor_regions_evac_time = predict_survivor_regions_evac_time();
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	632 size_t pending_cards = (size_t) get_new_prediction(_pending_cards_seq);
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	633 size_t adj_rs_lengths = rs_lengths + predict_rs_length_diff();
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	634 size_t scanned_cards = predict_young_card_num(adj_rs_lengths);
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	635 double base_time_ms =
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	636 predict_base_elapsed_time_ms(pending_cards, scanned_cards) +
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	637 survivor_regions_evac_time;
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	638 uint available_free_regions = _free_regions_at_end_of_collection;
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	639 uint base_free_regions = 0;
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	640 if (available_free_regions > _reserve_regions) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	641 base_free_regions = available_free_regions - _reserve_regions;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	642 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	643
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	644 // Here, we will make sure that the shortest young length that
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	645 // makes sense fits within the target pause time.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	646
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	647 if (predict_will_fit(min_young_length, base_time_ms,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	648 base_free_regions, target_pause_time_ms)) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	649 // The shortest young length will fit into the target pause time;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	650 // we'll now check whether the absolute maximum number of young
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	651 // regions will fit in the target pause time. If not, we'll do
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	652 // a binary search between min_young_length and max_young_length.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	653 if (predict_will_fit(max_young_length, base_time_ms,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	654 base_free_regions, target_pause_time_ms)) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	655 // The maximum young length will fit into the target pause time.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	656 // We are done so set min young length to the maximum length (as
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	657 // the result is assumed to be returned in min_young_length).
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	658 min_young_length = max_young_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	659 } else {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	660 // The maximum possible number of young regions will not fit within
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	661 // the target pause time so we'll search for the optimal
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	662 // length. The loop invariants are:
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	663 //
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	664 // min_young_length < max_young_length
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	665 // min_young_length is known to fit into the target pause time
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	666 // max_young_length is known not to fit into the target pause time
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	667 //
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	668 // Going into the loop we know the above hold as we've just
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	669 // checked them. Every time around the loop we check whether
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	670 // the middle value between min_young_length and
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	671 // max_young_length fits into the target pause time. If it
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	672 // does, it becomes the new min. If it doesn't, it becomes
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	673 // the new max. This way we maintain the loop invariants.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	674
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	675 assert(min_young_length < max_young_length, "invariant");
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	676 uint diff = (max_young_length - min_young_length) / 2;
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	677 while (diff > 0) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	678 uint young_length = min_young_length + diff;
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	679 if (predict_will_fit(young_length, base_time_ms,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	680 base_free_regions, target_pause_time_ms)) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	681 min_young_length = young_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	682 } else {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	683 max_young_length = young_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	684 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	685 assert(min_young_length < max_young_length, "invariant");
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	686 diff = (max_young_length - min_young_length) / 2;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	687 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	688 // The results is min_young_length which, according to the
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	689 // loop invariants, should fit within the target pause time.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	690
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	691 // These are the post-conditions of the binary search above:
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	692 assert(min_young_length < max_young_length,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	693 "otherwise we should have discovered that max_young_length "
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	694 "fits into the pause target and not done the binary search");
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	695 assert(predict_will_fit(min_young_length, base_time_ms,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	696 base_free_regions, target_pause_time_ms),
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	697 "min_young_length, the result of the binary search, should "
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	698 "fit into the pause target");
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	699 assert(!predict_will_fit(min_young_length + 1, base_time_ms,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	700 base_free_regions, target_pause_time_ms),
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	701 "min_young_length, the result of the binary search, should be "
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	702 "optimal, so no larger length should fit into the pause target");
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	703 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	704 } else {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	705 // Even the minimum length doesn't fit into the pause time
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	706 // target, return it as the result nevertheless.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	707 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	708 return base_min_length + min_young_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	709 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	710
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	711 double G1CollectorPolicy::predict_survivor_regions_evac_time() {
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	712 double survivor_regions_evac_time = 0.0;
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	713 for (HeapRegion * r = _recorded_survivor_head;
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	714 r != NULL && r != _recorded_survivor_tail->get_next_young_region();
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	715 r = r->get_next_young_region()) {
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	716 survivor_regions_evac_time += predict_region_elapsed_time_ms(r, gcs_are_young());
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	717 }
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	718 return survivor_regions_evac_time;
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	719 }
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	720
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	721 void G1CollectorPolicy::revise_young_list_target_length_if_necessary() {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	722 guarantee( adaptive_young_list_length(), "should not call this otherwise" );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	723
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	724 size_t rs_lengths = _g1->young_list()->sampled_rs_lengths();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	725 if (rs_lengths > _rs_lengths_prediction) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	726 // add 10% to avoid having to recalculate often
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	727 size_t rs_lengths_prediction = rs_lengths * 1100 / 1000;
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	728 update_young_list_target_length(rs_lengths_prediction);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	729 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	730 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	731
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	732
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	733
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	734 HeapWord* G1CollectorPolicy::mem_allocate_work(size_t size,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	735 bool is_tlab,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	736 bool* gc_overhead_limit_was_exceeded) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	737 guarantee(false, "Not using this policy feature yet.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	738 return NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	739 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	740
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	741 // This method controls how a collector handles one or more
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	742 // of its generations being fully allocated.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	743 HeapWord* G1CollectorPolicy::satisfy_failed_allocation(size_t size,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	744 bool is_tlab) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	745 guarantee(false, "Not using this policy feature yet.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	746 return NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	747 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	748
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	749
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	750 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	751 bool G1CollectorPolicy::verify_young_ages() {
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	752 HeapRegion* head = _g1->young_list()->first_region();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	753 return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	754 verify_young_ages(head, _short_lived_surv_rate_group);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	755 // also call verify_young_ages on any additional surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	756 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	757
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	758 bool
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	759 G1CollectorPolicy::verify_young_ages(HeapRegion* head,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	760 SurvRateGroup *surv_rate_group) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	761 guarantee( surv_rate_group != NULL, "pre-condition" );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	762
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	763 const char* name = surv_rate_group->name();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	764 bool ret = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	765 int prev_age = -1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	766
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	767 for (HeapRegion* curr = head;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	768 curr != NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	769 curr = curr->get_next_young_region()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	770 SurvRateGroup* group = curr->surv_rate_group();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	771 if (group == NULL && !curr->is_survivor()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	772 gclog_or_tty->print_cr("## %s: encountered NULL surv_rate_group", name);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	773 ret = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	774 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	775
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	776 if (surv_rate_group == group) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	777 int age = curr->age_in_surv_rate_group();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	778
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	779 if (age < 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	780 gclog_or_tty->print_cr("## %s: encountered negative age", name);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	781 ret = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	782 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	783
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	784 if (age <= prev_age) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	785 gclog_or_tty->print_cr("## %s: region ages are not strictly increasing "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	786 "(%d, %d)", name, age, prev_age);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	787 ret = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	788 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	789 prev_age = age;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	790 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	791 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	792
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	793 return ret;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	794 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	795 #endif // PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	796
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	797 void G1CollectorPolicy::record_full_collection_start() {
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	798 _full_collection_start_sec = os::elapsedTime();
10291 48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	799 record_heap_size_info_at_start(true /* full */);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	800 // Release the future to-space so that it is available for compaction into.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	801 _g1->set_full_collection();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	802 }
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 void G1CollectorPolicy::record_full_collection_end() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	805 // Consider this like a collection pause for the purposes of allocation
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	806 // since last pause.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	807 double end_sec = os::elapsedTime();
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	808 double full_gc_time_sec = end_sec - _full_collection_start_sec;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	809 double full_gc_time_ms = full_gc_time_sec * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	810
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	811 _trace_gen1_time_data.record_full_collection(full_gc_time_ms);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	812
595 3698e8f47799 6804746: G1: guarantee(variance() > -1.0,"variance should be >= 0") (due to evacuation failure) tonyp parents: 547 diff changeset	813 update_recent_gc_times(end_sec, full_gc_time_ms);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	814
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	815 _g1->clear_full_collection();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	816
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	817 // "Nuke" the heuristics that control the young/mixed GC
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	818 // transitions and make sure we start with young GCs after the Full GC.
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	819 set_gcs_are_young(true);
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	820 _last_young_gc = false;
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	821 clear_initiate_conc_mark_if_possible();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	822 clear_during_initial_mark_pause();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	823 _in_marking_window = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	824 _in_marking_window_im = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	825
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	826 _short_lived_surv_rate_group->start_adding_regions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	827 // also call this on any additional surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	828
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	829 record_survivor_regions(0, NULL, NULL);
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	830
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	831 _free_regions_at_end_of_collection = _g1->free_regions();
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	832 // Reset survivors SurvRateGroup.
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	833 _survivor_surv_rate_group->reset();
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	834 update_young_list_target_length();
6011 f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	835 _collectionSetChooser->clear();
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	836 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	837
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	838 void G1CollectorPolicy::record_stop_world_start() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	839 _stop_world_start = os::elapsedTime();
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
10098 71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	842 void G1CollectorPolicy::record_collection_pause_start(double start_time_sec) {
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	843 // We only need to do this here as the policy will only be applied
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	844 // to the GC we're about to start. so, no point is calculating this
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	845 // every time we calculate / recalculate the target young length.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	846 update_survivors_policy();
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	847
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	848 assert(_g1->used() == _g1->recalculate_used(),
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	849 err_msg("sanity, used: "SIZE_FORMAT" recalculate_used: "SIZE_FORMAT,
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	850 _g1->used(), _g1->recalculate_used()));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	851
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	852 double s_w_t_ms = (start_time_sec - _stop_world_start) * 1000.0;
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	853 _trace_gen0_time_data.record_start_collection(s_w_t_ms);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	854 _stop_world_start = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	855
10291 48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	856 record_heap_size_info_at_start(false /* full */);
10098 71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	857
6628 bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	858 phase_times()->record_cur_collection_start_sec(start_time_sec);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	859 _pending_cards = _g1->pending_card_num();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	860
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	861 _collection_set_bytes_used_before = 0;
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	862 _bytes_copied_during_gc = 0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	863
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	864 _last_gc_was_young = false;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	865
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	866 // do that for any other surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	867 _short_lived_surv_rate_group->stop_adding_regions();
1282 b81f3572f355 6928059: G1: command line parameter renaming tonyp parents: 1261 diff changeset	868 _survivors_age_table.clear();
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	869
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	870 assert( verify_young_ages(), "region age verification" );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	871 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	872
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	873 void G1CollectorPolicy::record_concurrent_mark_init_end(double
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	874 mark_init_elapsed_time_ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	875 _during_marking = true;
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	876 assert(!initiate_conc_mark_if_possible(), "we should have cleared it by now");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	877 clear_during_initial_mark_pause();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	878 _cur_mark_stop_world_time_ms = mark_init_elapsed_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	879 }
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 void G1CollectorPolicy::record_concurrent_mark_remark_start() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	882 _mark_remark_start_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	883 _during_marking = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	884 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	885
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	886 void G1CollectorPolicy::record_concurrent_mark_remark_end() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	887 double end_time_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	888 double elapsed_time_ms = (end_time_sec - _mark_remark_start_sec)*1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	889 _concurrent_mark_remark_times_ms->add(elapsed_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	890 _cur_mark_stop_world_time_ms += elapsed_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	891 _prev_collection_pause_end_ms += elapsed_time_ms;
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 _mmu_tracker->add_pause(_mark_remark_start_sec, end_time_sec, true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	894 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	895
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	896 void G1CollectorPolicy::record_concurrent_mark_cleanup_start() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	897 _mark_cleanup_start_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	898 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	899
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	900 void G1CollectorPolicy::record_concurrent_mark_cleanup_completed() {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	901 _last_young_gc = true;
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	902 _in_marking_window = false;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	903 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	904
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	905 void G1CollectorPolicy::record_concurrent_pause() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	906 if (_stop_world_start > 0.0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	907 double yield_ms = (os::elapsedTime() - _stop_world_start) * 1000.0;
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	908 _trace_gen0_time_data.record_yield_time(yield_ms);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	909 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	910 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	911
4834 6a78aa6ac1ff 7132311: G1: assert((s == klass->oop_size(this)) \|\| (Universe::heap()->is_gc_active() && ((is_typeArray()... brutisso parents: 4829 diff changeset	912 bool G1CollectorPolicy::need_to_start_conc_mark(const char* source, size_t alloc_word_size) {
6a78aa6ac1ff 7132311: G1: assert((s == klass->oop_size(this)) \|\| (Universe::heap()->is_gc_active() && ((is_typeArray()... brutisso parents: 4829 diff changeset	913 if (_g1->concurrent_mark()->cmThread()->during_cycle()) {
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	914 return false;
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	915 }
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	916
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	917 size_t marking_initiating_used_threshold =
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	918 (_g1->capacity() / 100) * InitiatingHeapOccupancyPercent;
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	919 size_t cur_used_bytes = _g1->non_young_capacity_bytes();
4834 6a78aa6ac1ff 7132311: G1: assert((s == klass->oop_size(this)) \|\| (Universe::heap()->is_gc_active() && ((is_typeArray()... brutisso parents: 4829 diff changeset	920 size_t alloc_byte_size = alloc_word_size * HeapWordSize;
6a78aa6ac1ff 7132311: G1: assert((s == klass->oop_size(this)) \|\| (Universe::heap()->is_gc_active() && ((is_typeArray()... brutisso parents: 4829 diff changeset	921
6a78aa6ac1ff 7132311: G1: assert((s == klass->oop_size(this)) \|\| (Universe::heap()->is_gc_active() && ((is_typeArray()... brutisso parents: 4829 diff changeset	922 if ((cur_used_bytes + alloc_byte_size) > marking_initiating_used_threshold) {
11125 f4311079200c 8020155: PSR:PERF G1 not collecting old regions when humongous allocations interfer brutisso parents: 10405 diff changeset	923 if (gcs_are_young() && !_last_young_gc) {
4834 6a78aa6ac1ff 7132311: G1: assert((s == klass->oop_size(this)) \|\| (Universe::heap()->is_gc_active() && ((is_typeArray()... brutisso parents: 4829 diff changeset	924 ergo_verbose5(ErgoConcCycles,
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	925 "request concurrent cycle initiation",
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	926 ergo_format_reason("occupancy higher than threshold")
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	927 ergo_format_byte("occupancy")
4834 6a78aa6ac1ff 7132311: G1: assert((s == klass->oop_size(this)) \|\| (Universe::heap()->is_gc_active() && ((is_typeArray()... brutisso parents: 4829 diff changeset	928 ergo_format_byte("allocation request")
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	929 ergo_format_byte_perc("threshold")
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	930 ergo_format_str("source"),
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	931 cur_used_bytes,
4834 6a78aa6ac1ff 7132311: G1: assert((s == klass->oop_size(this)) \|\| (Universe::heap()->is_gc_active() && ((is_typeArray()... brutisso parents: 4829 diff changeset	932 alloc_byte_size,
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	933 marking_initiating_used_threshold,
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	934 (double) InitiatingHeapOccupancyPercent,
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	935 source);
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	936 return true;
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	937 } else {
4834 6a78aa6ac1ff 7132311: G1: assert((s == klass->oop_size(this)) \|\| (Universe::heap()->is_gc_active() && ((is_typeArray()... brutisso parents: 4829 diff changeset	938 ergo_verbose5(ErgoConcCycles,
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	939 "do not request concurrent cycle initiation",
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	940 ergo_format_reason("still doing mixed collections")
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	941 ergo_format_byte("occupancy")
4834 6a78aa6ac1ff 7132311: G1: assert((s == klass->oop_size(this)) \|\| (Universe::heap()->is_gc_active() && ((is_typeArray()... brutisso parents: 4829 diff changeset	942 ergo_format_byte("allocation request")
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	943 ergo_format_byte_perc("threshold")
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	944 ergo_format_str("source"),
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	945 cur_used_bytes,
4834 6a78aa6ac1ff 7132311: G1: assert((s == klass->oop_size(this)) \|\| (Universe::heap()->is_gc_active() && ((is_typeArray()... brutisso parents: 4829 diff changeset	946 alloc_byte_size,
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	947 marking_initiating_used_threshold,
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	948 (double) InitiatingHeapOccupancyPercent,
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	949 source);
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	950 }
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	951 }
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	952
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	953 return false;
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	954 }
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	955
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	956 // Anything below that is considered to be zero
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	957 #define MIN_TIMER_GRANULARITY 0.0000001
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	958
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10291 diff changeset	959 void G1CollectorPolicy::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	960 double end_time_sec = os::elapsedTime();
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	961 assert(_cur_collection_pause_used_regions_at_start >= cset_region_length(),
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	962 "otherwise, the subtraction below does not make sense");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	963 size_t rs_size =
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	964 _cur_collection_pause_used_regions_at_start - cset_region_length();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	965 size_t cur_used_bytes = _g1->used();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	966 assert(cur_used_bytes == _g1->recalculate_used(), "It should!");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	967 bool last_pause_included_initial_mark = false;
1707 0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses tonyp parents: 1705 diff changeset	968 bool update_stats = !_g1->evacuation_failed();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	969
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	970 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	971 if (G1YoungSurvRateVerbose) {
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17866 diff changeset	972 gclog_or_tty->cr();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	973 _short_lived_surv_rate_group->print();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	974 // do that for any other surv rate groups too
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	975 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	976 #endif // PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	977
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	978 last_pause_included_initial_mark = during_initial_mark_pause();
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	979 if (last_pause_included_initial_mark) {
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	980 record_concurrent_mark_init_end(0.0);
11125 f4311079200c 8020155: PSR:PERF G1 not collecting old regions when humongous allocations interfer brutisso parents: 10405 diff changeset	981 } else if (need_to_start_conc_mark("end of GC")) {
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	982 // Note: this might have already been set, if during the last
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	983 // pause we decided to start a cycle but at the beginning of
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	984 // this pause we decided to postpone it. That's OK.
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	985 set_initiate_conc_mark_if_possible();
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	986 }
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	987
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	988 _mmu_tracker->add_pause(end_time_sec - pause_time_ms/1000.0,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	989 end_time_sec, false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	990
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10291 diff changeset	991 evacuation_info.set_collectionset_used_before(_collection_set_bytes_used_before);
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10291 diff changeset	992 evacuation_info.set_bytes_copied(_bytes_copied_during_gc);
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10291 diff changeset	993
595 3698e8f47799 6804746: G1: guarantee(variance() > -1.0,"variance should be >= 0") (due to evacuation failure) tonyp parents: 547 diff changeset	994 if (update_stats) {
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	995 _trace_gen0_time_data.record_end_collection(pause_time_ms, phase_times());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	996 // this is where we update the allocation rate of the application
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	997 double app_time_ms =
6628 bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	998 (phase_times()->cur_collection_start_sec() * 1000.0 - _prev_collection_pause_end_ms);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	999 if (app_time_ms < MIN_TIMER_GRANULARITY) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1000 // This usually happens due to the timer not having the required
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1001 // granularity. Some Linuxes are the usual culprits.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1002 // We'll just set it to something (arbitrarily) small.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1003 app_time_ms = 1.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1004 }
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1005 // We maintain the invariant that all objects allocated by mutator
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1006 // threads will be allocated out of eden regions. So, we can use
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1007 // the eden region number allocated since the previous GC to
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1008 // calculate the application's allocate rate. The only exception
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1009 // to that is humongous objects that are allocated separately. But
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1010 // given that humongous object allocations do not really affect
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1011 // either the pause's duration nor when the next pause will take
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1012 // place we can safely ignore them here.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	1013 uint regions_allocated = eden_cset_region_length();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1014 double alloc_rate_ms = (double) regions_allocated / app_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1015 _alloc_rate_ms_seq->add(alloc_rate_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1016
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1017 double interval_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1018 (end_time_sec - _recent_prev_end_times_for_all_gcs_sec->oldest()) * 1000.0;
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	1019 update_recent_gc_times(end_time_sec, pause_time_ms);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1020 _recent_avg_pause_time_ratio = _recent_gc_times_ms->sum()/interval_ms;
1086 89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1021 if (recent_avg_pause_time_ratio() < 0.0 \|\|
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1022 (recent_avg_pause_time_ratio() - 1.0 > 0.0)) {
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1023 #ifndef PRODUCT
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1024 // Dump info to allow post-facto debugging
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1025 gclog_or_tty->print_cr("recent_avg_pause_time_ratio() out of bounds");
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1026 gclog_or_tty->print_cr("-------------------------------------------");
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1027 gclog_or_tty->print_cr("Recent GC Times (ms):");
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1028 _recent_gc_times_ms->dump();
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1029 gclog_or_tty->print_cr("(End Time=%3.3f) Recent GC End Times (s):", end_time_sec);
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1030 _recent_prev_end_times_for_all_gcs_sec->dump();
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1031 gclog_or_tty->print_cr("GC = %3.3f, Interval = %3.3f, Ratio = %3.3f",
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1032 _recent_gc_times_ms->sum(), interval_ms, recent_avg_pause_time_ratio());
1087 23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag ysr parents: 1086 diff changeset	1033 // In debug mode, terminate the JVM if the user wants to debug at this point.
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag ysr parents: 1086 diff changeset	1034 assert(!G1FailOnFPError, "Debugging data for CR 6898948 has been dumped above");
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag ysr parents: 1086 diff changeset	1035 #endif // !PRODUCT
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag ysr parents: 1086 diff changeset	1036 // Clip ratio between 0.0 and 1.0, and continue. This will be fixed in
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag ysr parents: 1086 diff changeset	1037 // CR 6902692 by redoing the manner in which the ratio is incrementally computed.
1086 89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1038 if (_recent_avg_pause_time_ratio < 0.0) {
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1039 _recent_avg_pause_time_ratio = 0.0;
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1040 } else {
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1041 assert(_recent_avg_pause_time_ratio - 1.0 > 0.0, "Ctl-point invariant");
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1042 _recent_avg_pause_time_ratio = 1.0;
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1043 }
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1044 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1045 }
10291 48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1046
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1047 bool new_in_marking_window = _in_marking_window;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1048 bool new_in_marking_window_im = false;
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1049 if (during_initial_mark_pause()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1050 new_in_marking_window = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1051 new_in_marking_window_im = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1052 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1053
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1054 if (_last_young_gc) {
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1055 // This is supposed to to be the "last young GC" before we start
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1056 // doing mixed GCs. Here we decide whether to start mixed GCs or not.
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1057
3982 273b46400613 7086533: G1: assert(!_g1->is_obj_dead(obj)): We should not be preserving dead objs: g1CollectedHeap.cpp:3835 johnc parents: 3979 diff changeset	1058 if (!last_pause_included_initial_mark) {
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1059 if (next_gc_should_be_mixed("start mixed GCs",
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1060 "do not start mixed GCs")) {
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1061 set_gcs_are_young(false);
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1062 }
3982 273b46400613 7086533: G1: assert(!_g1->is_obj_dead(obj)): We should not be preserving dead objs: g1CollectedHeap.cpp:3835 johnc parents: 3979 diff changeset	1063 } else {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1064 ergo_verbose0(ErgoMixedGCs,
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1065 "do not start mixed GCs",
3982 273b46400613 7086533: G1: assert(!_g1->is_obj_dead(obj)): We should not be preserving dead objs: g1CollectedHeap.cpp:3835 johnc parents: 3979 diff changeset	1066 ergo_format_reason("concurrent cycle is about to start"));
273b46400613 7086533: G1: assert(!_g1->is_obj_dead(obj)): We should not be preserving dead objs: g1CollectedHeap.cpp:3835 johnc parents: 3979 diff changeset	1067 }
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1068 _last_young_gc = false;
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1069 }
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1070
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1071 if (!_last_gc_was_young) {
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1072 // This is a mixed GC. Here we decide whether to continue doing
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1073 // mixed GCs or not.
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1074
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1075 if (!next_gc_should_be_mixed("continue mixed GCs",
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1076 "do not continue mixed GCs")) {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1077 set_gcs_are_young(true);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1078 }
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1079 }
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1080
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1081 _short_lived_surv_rate_group->start_adding_regions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1082 // do that for any other surv rate groupsx
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1083
677 96b229c54d1e 6543938: G1: remove the concept of popularity apetrusenko parents: 648 diff changeset	1084 if (update_stats) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1085 double cost_per_card_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1086 if (_pending_cards > 0) {
6628 bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	1087 cost_per_card_ms = phase_times()->average_last_update_rs_time() / (double) _pending_cards;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1088 _cost_per_card_ms_seq->add(cost_per_card_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1089 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1090
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1091 size_t cards_scanned = _g1->cards_scanned();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1092
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1093 double cost_per_entry_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1094 if (cards_scanned > 10) {
6628 bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	1095 cost_per_entry_ms = phase_times()->average_last_scan_rs_time() / (double) cards_scanned;
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1096 if (_last_gc_was_young) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1097 _cost_per_entry_ms_seq->add(cost_per_entry_ms);
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1098 } else {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1099 _mixed_cost_per_entry_ms_seq->add(cost_per_entry_ms);
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1100 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1101 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1102
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1103 if (_max_rs_lengths > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1104 double cards_per_entry_ratio =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1105 (double) cards_scanned / (double) _max_rs_lengths;
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1106 if (_last_gc_was_young) {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1107 _young_cards_per_entry_ratio_seq->add(cards_per_entry_ratio);
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1108 } else {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1109 _mixed_cards_per_entry_ratio_seq->add(cards_per_entry_ratio);
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1110 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1111 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1112
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1113 // This is defensive. For a while _max_rs_lengths could get
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1114 // smaller than _recorded_rs_lengths which was causing
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1115 // rs_length_diff to get very large and mess up the RSet length
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1116 // predictions. The reason was unsafe concurrent updates to the
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1117 // _inc_cset_recorded_rs_lengths field which the code below guards
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1118 // against (see CR 7118202). This bug has now been fixed (see CR
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1119 // 7119027). However, I'm still worried that
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1120 // _inc_cset_recorded_rs_lengths might still end up somewhat
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1121 // inaccurate. The concurrent refinement thread calculates an
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1122 // RSet's length concurrently with other CR threads updating it
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1123 // which might cause it to calculate the length incorrectly (if,
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1124 // say, it's in mid-coarsening). So I'll leave in the defensive
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1125 // conditional below just in case.
4130 d23d2b18183e 7118202: G1: eden size unnecessarily drops to a minimum tonyp parents: 4097 diff changeset	1126 size_t rs_length_diff = 0;
d23d2b18183e 7118202: G1: eden size unnecessarily drops to a minimum tonyp parents: 4097 diff changeset	1127 if (_max_rs_lengths > _recorded_rs_lengths) {
d23d2b18183e 7118202: G1: eden size unnecessarily drops to a minimum tonyp parents: 4097 diff changeset	1128 rs_length_diff = _max_rs_lengths - _recorded_rs_lengths;
d23d2b18183e 7118202: G1: eden size unnecessarily drops to a minimum tonyp parents: 4097 diff changeset	1129 }
d23d2b18183e 7118202: G1: eden size unnecessarily drops to a minimum tonyp parents: 4097 diff changeset	1130 _rs_length_diff_seq->add((double) rs_length_diff);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1131
10291 48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1132 size_t freed_bytes = _heap_used_bytes_before_gc - cur_used_bytes;
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1133 size_t copied_bytes = _collection_set_bytes_used_before - freed_bytes;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1134 double cost_per_byte_ms = 0.0;
10291 48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1135
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1136 if (copied_bytes > 0) {
6628 bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	1137 cost_per_byte_ms = phase_times()->average_last_obj_copy_time() / (double) copied_bytes;
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1138 if (_in_marking_window) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1139 _cost_per_byte_ms_during_cm_seq->add(cost_per_byte_ms);
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1140 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1141 _cost_per_byte_ms_seq->add(cost_per_byte_ms);
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1142 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1143 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1144
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1145 double all_other_time_ms = pause_time_ms -
6628 bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	1146 (phase_times()->average_last_update_rs_time() + phase_times()->average_last_scan_rs_time()
bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	1147 + phase_times()->average_last_obj_copy_time() + phase_times()->average_last_termination_time());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1148
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1149 double young_other_time_ms = 0.0;
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1150 if (young_cset_region_length() > 0) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1151 young_other_time_ms =
6628 bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	1152 phase_times()->young_cset_choice_time_ms() +
bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	1153 phase_times()->young_free_cset_time_ms();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1154 _young_other_cost_per_region_ms_seq->add(young_other_time_ms /
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1155 (double) young_cset_region_length());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1156 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1157 double non_young_other_time_ms = 0.0;
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1158 if (old_cset_region_length() > 0) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1159 non_young_other_time_ms =
6628 bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	1160 phase_times()->non_young_cset_choice_time_ms() +
bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	1161 phase_times()->non_young_free_cset_time_ms();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1162
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1163 _non_young_other_cost_per_region_ms_seq->add(non_young_other_time_ms /
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1164 (double) old_cset_region_length());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1165 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1166
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1167 double constant_other_time_ms = all_other_time_ms -
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1168 (young_other_time_ms + non_young_other_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1169 _constant_other_time_ms_seq->add(constant_other_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1170
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1171 double survival_ratio = 0.0;
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1172 if (_collection_set_bytes_used_before > 0) {
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	1173 survival_ratio = (double) _bytes_copied_during_gc /
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1174 (double) _collection_set_bytes_used_before;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1175 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1176
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1177 _pending_cards_seq->add((double) _pending_cards);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1178 _rs_lengths_seq->add((double) _max_rs_lengths);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1179 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1180
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1181 _in_marking_window = new_in_marking_window;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1182 _in_marking_window_im = new_in_marking_window_im;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1183 _free_regions_at_end_of_collection = _g1->free_regions();
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	1184 update_young_list_target_length();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1185
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1186 // Note that _mmu_tracker->max_gc_time() returns the time in seconds.
1282 b81f3572f355 6928059: G1: command line parameter renaming tonyp parents: 1261 diff changeset	1187 double update_rs_time_goal_ms = _mmu_tracker->max_gc_time() * MILLIUNITS * G1RSetUpdatingPauseTimePercent / 100.0;
6628 bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	1188 adjust_concurrent_refinement(phase_times()->average_last_update_rs_time(),
bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	1189 phase_times()->sum_last_update_rs_processed_buffers(), update_rs_time_goal_ms);
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	1190
6011 f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	1191 _collectionSetChooser->verify();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1192 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1193
6059 3a22b77e755a 7161545: G1: Minor cleanups to the G1 logging brutisso parents: 6030 diff changeset	1194 #define EXT_SIZE_FORMAT "%.1f%s"
3764 053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1195 #define EXT_SIZE_PARAMS(bytes) \
6059 3a22b77e755a 7161545: G1: Minor cleanups to the G1 logging brutisso parents: 6030 diff changeset	1196 byte_size_in_proper_unit((double)(bytes)), \
3764 053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1197 proper_unit_for_byte_size((bytes))
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1198
10291 48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1199 void G1CollectorPolicy::record_heap_size_info_at_start(bool full) {
10098 71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	1200 YoungList* young_list = _g1->young_list();
10291 48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1201 _eden_used_bytes_before_gc = young_list->eden_used_bytes();
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1202 _survivor_used_bytes_before_gc = young_list->survivor_used_bytes();
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1203 _heap_capacity_bytes_before_gc = _g1->capacity();
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1204 _heap_used_bytes_before_gc = _g1->used();
10098 71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	1205 _cur_collection_pause_used_regions_at_start = _g1->used_regions();
71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	1206
10291 48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1207 _eden_capacity_bytes_before_gc =
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1208 (_young_list_target_length * HeapRegion::GrainBytes) - _survivor_used_bytes_before_gc;
10098 71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	1209
10291 48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1210 if (full) {
17866 270d7cb38f40 8038934: Remove prefix allocated_ from methods and variables in Metaspace ehelin parents: 13060 diff changeset	1211 _metaspace_used_bytes_before_gc = MetaspaceAux::used_bytes();
10291 48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1212 }
10098 71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	1213 }
71013d764f6e 8010780: G1: Eden occupancy/capacity output wrong after a full GC johnc parents: 8681 diff changeset	1214
3764 053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1215 void G1CollectorPolicy::print_heap_transition() {
6628 bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	1216 _g1->print_size_transition(gclog_or_tty,
10291 48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1217 _heap_used_bytes_before_gc,
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1218 _g1->used(),
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1219 _g1->capacity());
6628 bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	1220 }
bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	1221
10291 48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1222 void G1CollectorPolicy::print_detailed_heap_transition(bool full) {
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1223 YoungList* young_list = _g1->young_list();
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1224
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1225 size_t eden_used_bytes_after_gc = young_list->eden_used_bytes();
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1226 size_t survivor_used_bytes_after_gc = young_list->survivor_used_bytes();
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1227 size_t heap_used_bytes_after_gc = _g1->used();
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1228
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1229 size_t heap_capacity_bytes_after_gc = _g1->capacity();
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1230 size_t eden_capacity_bytes_after_gc =
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1231 (_young_list_target_length * HeapRegion::GrainBytes) - survivor_used_bytes_after_gc;
3764 053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1232
10291 48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1233 gclog_or_tty->print(
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1234 " [Eden: "EXT_SIZE_FORMAT"("EXT_SIZE_FORMAT")->"EXT_SIZE_FORMAT"("EXT_SIZE_FORMAT") "
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1235 "Survivors: "EXT_SIZE_FORMAT"->"EXT_SIZE_FORMAT" "
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1236 "Heap: "EXT_SIZE_FORMAT"("EXT_SIZE_FORMAT")->"
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1237 EXT_SIZE_FORMAT"("EXT_SIZE_FORMAT")]",
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1238 EXT_SIZE_PARAMS(_eden_used_bytes_before_gc),
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1239 EXT_SIZE_PARAMS(_eden_capacity_bytes_before_gc),
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1240 EXT_SIZE_PARAMS(eden_used_bytes_after_gc),
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1241 EXT_SIZE_PARAMS(eden_capacity_bytes_after_gc),
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1242 EXT_SIZE_PARAMS(_survivor_used_bytes_before_gc),
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1243 EXT_SIZE_PARAMS(survivor_used_bytes_after_gc),
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1244 EXT_SIZE_PARAMS(_heap_used_bytes_before_gc),
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1245 EXT_SIZE_PARAMS(_heap_capacity_bytes_before_gc),
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1246 EXT_SIZE_PARAMS(heap_used_bytes_after_gc),
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1247 EXT_SIZE_PARAMS(heap_capacity_bytes_after_gc));
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1248
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1249 if (full) {
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1250 MetaspaceAux::print_metaspace_change(_metaspace_used_bytes_before_gc);
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1251 }
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1252
48391ab0687e 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info johnc parents: 10239 diff changeset	1253 gclog_or_tty->cr();
3764 053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1254 }
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1255
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1256 void G1CollectorPolicy::adjust_concurrent_refinement(double update_rs_time,
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1257 double update_rs_processed_buffers,
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1258 double goal_ms) {
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1259 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set();
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1260 ConcurrentG1Refine *cg1r = G1CollectedHeap::heap()->concurrent_g1_refine();
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1261
1282 b81f3572f355 6928059: G1: command line parameter renaming tonyp parents: 1261 diff changeset	1262 if (G1UseAdaptiveConcRefinement) {
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1263 const int k_gy = 3, k_gr = 6;
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1264 const double inc_k = 1.1, dec_k = 0.9;
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1265
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1266 int g = cg1r->green_zone();
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1267 if (update_rs_time > goal_ms) {
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1268 g = (int)(g * dec_k); // Can become 0, that's OK. That would mean a mutator-only processing.
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1269 } else {
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1270 if (update_rs_time < goal_ms && update_rs_processed_buffers > g) {
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1271 g = (int)MAX2(g * inc_k, g + 1.0);
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1272 }
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1273 }
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1274 // Change the refinement threads params
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1275 cg1r->set_green_zone(g);
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1276 cg1r->set_yellow_zone(g * k_gy);
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1277 cg1r->set_red_zone(g * k_gr);
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1278 cg1r->reinitialize_threads();
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1279
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1280 int processing_threshold_delta = MAX2((int)(cg1r->green_zone() * sigma()), 1);
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1281 int processing_threshold = MIN2(cg1r->green_zone() + processing_threshold_delta,
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1282 cg1r->yellow_zone());
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1283 // Change the barrier params
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1284 dcqs.set_process_completed_threshold(processing_threshold);
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1285 dcqs.set_max_completed_queue(cg1r->red_zone());
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1286 }
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1287
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1288 int curr_queue_size = dcqs.completed_buffers_num();
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1289 if (curr_queue_size >= cg1r->yellow_zone()) {
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1290 dcqs.set_completed_queue_padding(curr_queue_size);
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1291 } else {
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1292 dcqs.set_completed_queue_padding(0);
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1293 }
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1294 dcqs.notify_if_necessary();
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1295 }
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1296
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1297 double
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1298 G1CollectorPolicy::predict_base_elapsed_time_ms(size_t pending_cards,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1299 size_t scanned_cards) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1300 return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1301 predict_rs_update_time_ms(pending_cards) +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1302 predict_rs_scan_time_ms(scanned_cards) +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1303 predict_constant_other_time_ms();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1304 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1305
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1306 double
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1307 G1CollectorPolicy::predict_base_elapsed_time_ms(size_t pending_cards) {
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1308 size_t rs_length = predict_rs_length_diff();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1309 size_t card_num;
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1310 if (gcs_are_young()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1311 card_num = predict_young_card_num(rs_length);
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1312 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1313 card_num = predict_non_young_card_num(rs_length);
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1314 }
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1315 return predict_base_elapsed_time_ms(pending_cards, card_num);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1316 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1317
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	1318 size_t G1CollectorPolicy::predict_bytes_to_copy(HeapRegion* hr) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1319 size_t bytes_to_copy;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1320 if (hr->is_marked())
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1321 bytes_to_copy = hr->max_live_bytes();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1322 else {
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1323 assert(hr->is_young() && hr->age_in_surv_rate_group() != -1, "invariant");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1324 int age = hr->age_in_surv_rate_group();
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	1325 double yg_surv_rate = predict_yg_surv_rate(age, hr->surv_rate_group());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1326 bytes_to_copy = (size_t) ((double) hr->used() * yg_surv_rate);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1327 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1328 return bytes_to_copy;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1329 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1330
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1331 double
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1332 G1CollectorPolicy::predict_region_elapsed_time_ms(HeapRegion* hr,
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1333 bool for_young_gc) {
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1334 size_t rs_length = hr->rem_set()->occupied();
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1335 size_t card_num;
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1336
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1337 // Predicting the number of cards is based on which type of GC
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1338 // we're predicting for.
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1339 if (for_young_gc) {
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1340 card_num = predict_young_card_num(rs_length);
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1341 } else {
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1342 card_num = predict_non_young_card_num(rs_length);
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1343 }
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1344 size_t bytes_to_copy = predict_bytes_to_copy(hr);
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1345
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1346 double region_elapsed_time_ms =
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1347 predict_rs_scan_time_ms(card_num) +
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1348 predict_object_copy_time_ms(bytes_to_copy);
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1349
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1350 // The prediction of the "other" time for this region is based
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1351 // upon the region type and NOT the GC type.
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1352 if (hr->is_young()) {
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1353 region_elapsed_time_ms += predict_young_other_time_ms(1);
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1354 } else {
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1355 region_elapsed_time_ms += predict_non_young_other_time_ms(1);
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1356 }
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1357 return region_elapsed_time_ms;
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1358 }
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1359
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1360 void
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	1361 G1CollectorPolicy::init_cset_region_lengths(uint eden_cset_region_length,
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	1362 uint survivor_cset_region_length) {
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1363 _eden_cset_region_length = eden_cset_region_length;
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1364 _survivor_cset_region_length = survivor_cset_region_length;
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1365 _old_cset_region_length = 0;
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1366 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1367
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1368 void G1CollectorPolicy::set_recorded_rs_lengths(size_t rs_lengths) {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1369 _recorded_rs_lengths = rs_lengths;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1370 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1371
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1372 void G1CollectorPolicy::update_recent_gc_times(double end_time_sec,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1373 double elapsed_ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1374 _recent_gc_times_ms->add(elapsed_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1375 _recent_prev_end_times_for_all_gcs_sec->add(end_time_sec);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1376 _prev_collection_pause_end_ms = end_time_sec * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1377 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1378
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1379 size_t G1CollectorPolicy::expansion_amount() {
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1380 double recent_gc_overhead = recent_avg_pause_time_ratio() * 100.0;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1381 double threshold = _gc_overhead_perc;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1382 if (recent_gc_overhead > threshold) {
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 677 diff changeset	1383 // We will double the existing space, or take
20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 677 diff changeset	1384 // G1ExpandByPercentOfAvailable % of the available expansion
20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 677 diff changeset	1385 // space, whichever is smaller, bounded below by a minimum
20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 677 diff changeset	1386 // expansion (unless that's all that's left.)
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1387 const size_t min_expand_bytes = 1*M;
2188 c33825b68624 6923430: G1: assert(res != 0,"This should have worked.") johnc parents: 2152 diff changeset	1388 size_t reserved_bytes = _g1->max_capacity();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1389 size_t committed_bytes = _g1->capacity();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1390 size_t uncommitted_bytes = reserved_bytes - committed_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1391 size_t expand_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1392 size_t expand_bytes_via_pct =
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 677 diff changeset	1393 uncommitted_bytes * G1ExpandByPercentOfAvailable / 100;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1394 expand_bytes = MIN2(expand_bytes_via_pct, committed_bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1395 expand_bytes = MAX2(expand_bytes, min_expand_bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1396 expand_bytes = MIN2(expand_bytes, uncommitted_bytes);
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1397
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1398 ergo_verbose5(ErgoHeapSizing,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1399 "attempt heap expansion",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1400 ergo_format_reason("recent GC overhead higher than "
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1401 "threshold after GC")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1402 ergo_format_perc("recent GC overhead")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1403 ergo_format_perc("threshold")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1404 ergo_format_byte("uncommitted")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1405 ergo_format_byte_perc("calculated expansion amount"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1406 recent_gc_overhead, threshold,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1407 uncommitted_bytes,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1408 expand_bytes_via_pct, (double) G1ExpandByPercentOfAvailable);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1409
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1410 return expand_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1411 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1412 return 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1413 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1414 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1415
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1416 void G1CollectorPolicy::print_tracing_info() const {
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	1417 _trace_gen0_time_data.print();
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	1418 _trace_gen1_time_data.print();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1419 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1420
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1421 void G1CollectorPolicy::print_yg_surv_rate_info() const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1422 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1423 _short_lived_surv_rate_group->print_surv_rate_summary();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1424 // add this call for any other surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1425 #endif // PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1426 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1427
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	1428 uint G1CollectorPolicy::max_regions(int purpose) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1429 switch (purpose) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1430 case GCAllocForSurvived:
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	1431 return _max_survivor_regions;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1432 case GCAllocForTenured:
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	1433 return REGIONS_UNLIMITED;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1434 default:
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	1435 ShouldNotReachHere();
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	1436 return REGIONS_UNLIMITED;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1437 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1438 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1439
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	1440 void G1CollectorPolicy::update_max_gc_locker_expansion() {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	1441 uint expansion_region_num = 0;
1991 016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	1442 if (GCLockerEdenExpansionPercent > 0) {
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	1443 double perc = (double) GCLockerEdenExpansionPercent / 100.0;
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	1444 double expansion_region_num_d = perc * (double) _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	1445 // We use ceiling so that if expansion_region_num_d is > 0.0 (but
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	1446 // less than 1.0) we'll get 1.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	1447 expansion_region_num = (uint) ceil(expansion_region_num_d);
1991 016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	1448 } else {
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	1449 assert(expansion_region_num == 0, "sanity");
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	1450 }
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	1451 _young_list_max_length = _young_list_target_length + expansion_region_num;
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	1452 assert(_young_list_target_length <= _young_list_max_length, "post-condition");
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	1453 }
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	1454
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	1455 // Calculates survivor space parameters.
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	1456 void G1CollectorPolicy::update_survivors_policy() {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	1457 double max_survivor_regions_d =
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	1458 (double) _young_list_target_length / (double) SurvivorRatio;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	1459 // We use ceiling so that if max_survivor_regions_d is > 0.0 (but
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	1460 // smaller than 1.0) we'll get 1.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	1461 _max_survivor_regions = (uint) ceil(max_survivor_regions_d);
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	1462
3868 ae73da50be4b 7081064: G1: remove develop params G1FixedSurvivorSpaceSize, G1FixedTenuringThreshold, and G1FixedEdenSize tonyp parents: 3867 diff changeset	1463 _tenuring_threshold = _survivors_age_table.compute_tenuring_threshold(
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	1464 HeapRegion::GrainWords * _max_survivor_regions);
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	1465 }
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	1466
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1467 bool G1CollectorPolicy::force_initial_mark_if_outside_cycle(
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1468 GCCause::Cause gc_cause) {
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	1469 bool during_cycle = _g1->concurrent_mark()->cmThread()->during_cycle();
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	1470 if (!during_cycle) {
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1471 ergo_verbose1(ErgoConcCycles,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1472 "request concurrent cycle initiation",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1473 ergo_format_reason("requested by GC cause")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1474 ergo_format_str("GC cause"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1475 GCCause::to_string(gc_cause));
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	1476 set_initiate_conc_mark_if_possible();
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	1477 return true;
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	1478 } else {
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1479 ergo_verbose1(ErgoConcCycles,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1480 "do not request concurrent cycle initiation",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1481 ergo_format_reason("concurrent cycle already in progress")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1482 ergo_format_str("GC cause"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1483 GCCause::to_string(gc_cause));
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	1484 return false;
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	1485 }
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	1486 }
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	1487
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1488 void
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1489 G1CollectorPolicy::decide_on_conc_mark_initiation() {
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1490 // We are about to decide on whether this pause will be an
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1491 // initial-mark pause.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1492
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1493 // First, during_initial_mark_pause() should not be already set. We
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1494 // will set it here if we have to. However, it should be cleared by
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1495 // the end of the pause (it's only set for the duration of an
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1496 // initial-mark pause).
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1497 assert(!during_initial_mark_pause(), "pre-condition");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1498
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1499 if (initiate_conc_mark_if_possible()) {
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1500 // We had noticed on a previous pause that the heap occupancy has
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1501 // gone over the initiating threshold and we should start a
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1502 // concurrent marking cycle. So we might initiate one.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1503
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1504 bool during_cycle = _g1->concurrent_mark()->cmThread()->during_cycle();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1505 if (!during_cycle) {
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1506 // The concurrent marking thread is not "during a cycle", i.e.,
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1507 // it has completed the last one. So we can go ahead and
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1508 // initiate a new cycle.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1509
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1510 set_during_initial_mark_pause();
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1511 // We do not allow mixed GCs during marking.
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1512 if (!gcs_are_young()) {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1513 set_gcs_are_young(true);
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1514 ergo_verbose0(ErgoMixedGCs,
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1515 "end mixed GCs",
3982 273b46400613 7086533: G1: assert(!_g1->is_obj_dead(obj)): We should not be preserving dead objs: g1CollectedHeap.cpp:3835 johnc parents: 3979 diff changeset	1516 ergo_format_reason("concurrent cycle is about to start"));
273b46400613 7086533: G1: assert(!_g1->is_obj_dead(obj)): We should not be preserving dead objs: g1CollectedHeap.cpp:3835 johnc parents: 3979 diff changeset	1517 }
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1518
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1519 // And we can now clear initiate_conc_mark_if_possible() as
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1520 // we've already acted on it.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1521 clear_initiate_conc_mark_if_possible();
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1522
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1523 ergo_verbose0(ErgoConcCycles,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1524 "initiate concurrent cycle",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1525 ergo_format_reason("concurrent cycle initiation requested"));
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1526 } else {
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1527 // The concurrent marking thread is still finishing up the
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1528 // previous cycle. If we start one right now the two cycles
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1529 // overlap. In particular, the concurrent marking thread might
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1530 // be in the process of clearing the next marking bitmap (which
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1531 // we will use for the next cycle if we start one). Starting a
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1532 // cycle now will be bad given that parts of the marking
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1533 // information might get cleared by the marking thread. And we
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1534 // cannot wait for the marking thread to finish the cycle as it
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1535 // periodically yields while clearing the next marking bitmap
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1536 // and, if it's in a yield point, it's waiting for us to
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1537 // finish. So, at this point we will not start a cycle and we'll
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1538 // let the concurrent marking thread complete the last one.
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1539 ergo_verbose0(ErgoConcCycles,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1540 "do not initiate concurrent cycle",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1541 ergo_format_reason("concurrent cycle already in progress"));
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1542 }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1543 }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1544 }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1545
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1546 class KnownGarbageClosure: public HeapRegionClosure {
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1547 G1CollectedHeap* _g1h;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1548 CollectionSetChooser* _hrSorted;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1549
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1550 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1551 KnownGarbageClosure(CollectionSetChooser* hrSorted) :
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1552 _g1h(G1CollectedHeap::heap()), _hrSorted(hrSorted) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1553
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1554 bool doHeapRegion(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1555 // We only include humongous regions in collection
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1556 // sets when concurrent mark shows that their contained object is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1557 // unreachable.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1558
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1559 // Do we have any marking information for this region?
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1560 if (r->is_marked()) {
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1561 // We will skip any region that's currently used as an old GC
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1562 // alloc region (we should not consider those for collection
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1563 // before we fill them up).
6011 f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	1564 if (_hrSorted->should_add(r) && !_g1h->is_old_gc_alloc_region(r)) {
f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	1565 _hrSorted->add_region(r);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1566 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1567 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1568 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1569 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1570 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1571
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1572 class ParKnownGarbageHRClosure: public HeapRegionClosure {
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1573 G1CollectedHeap* _g1h;
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6219 diff changeset	1574 CSetChooserParUpdater _cset_updater;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1575
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1576 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1577 ParKnownGarbageHRClosure(CollectionSetChooser* hrSorted,
6011 f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	1578 uint chunk_size) :
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6219 diff changeset	1579 _g1h(G1CollectedHeap::heap()),
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6219 diff changeset	1580 _cset_updater(hrSorted, true /* parallel */, chunk_size) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1581
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1582 bool doHeapRegion(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1583 // Do we have any marking information for this region?
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1584 if (r->is_marked()) {
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1585 // We will skip any region that's currently used as an old GC
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1586 // alloc region (we should not consider those for collection
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1587 // before we fill them up).
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6219 diff changeset	1588 if (_cset_updater.should_add(r) && !_g1h->is_old_gc_alloc_region(r)) {
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6219 diff changeset	1589 _cset_updater.add_region(r);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1590 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1591 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1592 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1593 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1594 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1595
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1596 class ParKnownGarbageTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1597 CollectionSetChooser* _hrSorted;
6011 f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	1598 uint _chunk_size;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1599 G1CollectedHeap* _g1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1600 public:
6011 f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	1601 ParKnownGarbageTask(CollectionSetChooser* hrSorted, uint chunk_size) :
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1602 AbstractGangTask("ParKnownGarbageTask"),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1603 _hrSorted(hrSorted), _chunk_size(chunk_size),
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1604 _g1(G1CollectedHeap::heap()) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1605
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4727 diff changeset	1606 void work(uint worker_id) {
6011 f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	1607 ParKnownGarbageHRClosure parKnownGarbageCl(_hrSorted, _chunk_size);
f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	1608
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1609 // Back to zero for the claim value.
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4727 diff changeset	1610 _g1->heap_region_par_iterate_chunked(&parKnownGarbageCl, worker_id,
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1611 _g1->workers()->active_workers(),
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 342 diff changeset	1612 HeapRegion::InitialClaimValue);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1613 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1614 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1615
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1616 void
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1617 G1CollectorPolicy::record_concurrent_mark_cleanup_end(int no_of_gc_threads) {
6011 f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	1618 _collectionSetChooser->clear();
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	1619
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	1620 uint region_num = _g1->n_regions();
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1779 diff changeset	1621 if (G1CollectedHeap::use_parallel_gc_threads()) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	1622 const uint OverpartitionFactor = 4;
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	1623 uint WorkUnit;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1624 // The use of MinChunkSize = 8 in the original code
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1625 // causes some assertion failures when the total number of
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1626 // region is less than 8. The code here tries to fix that.
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1627 // Should the original code also be fixed?
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1628 if (no_of_gc_threads > 0) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	1629 const uint MinWorkUnit = MAX2(region_num / no_of_gc_threads, 1U);
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	1630 WorkUnit = MAX2(region_num / (no_of_gc_threads * OverpartitionFactor),
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	1631 MinWorkUnit);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1632 } else {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1633 assert(no_of_gc_threads > 0,
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1634 "The active gc workers should be greater than 0");
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1635 // In a product build do something reasonable to avoid a crash.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	1636 const uint MinWorkUnit = MAX2(region_num / (uint) ParallelGCThreads, 1U);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1637 WorkUnit =
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	1638 MAX2(region_num / (uint) (ParallelGCThreads * OverpartitionFactor),
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1639 MinWorkUnit);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1640 }
6011 f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	1641 _collectionSetChooser->prepare_for_par_region_addition(_g1->n_regions(),
f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	1642 WorkUnit);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1643 ParKnownGarbageTask parKnownGarbageTask(_collectionSetChooser,
1571 2d127394260e 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb kvn parents: 1394 diff changeset	1644 (int) WorkUnit);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1645 _g1->workers()->run_task(&parKnownGarbageTask);
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 342 diff changeset	1646
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 342 diff changeset	1647 assert(_g1->check_heap_region_claim_values(HeapRegion::InitialClaimValue),
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 342 diff changeset	1648 "sanity check");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1649 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1650 KnownGarbageClosure knownGarbagecl(_collectionSetChooser);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1651 _g1->heap_region_iterate(&knownGarbagecl);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1652 }
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	1653
6011 f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	1654 _collectionSetChooser->sort_regions();
f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	1655
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	1656 double end_sec = os::elapsedTime();
074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	1657 double elapsed_time_ms = (end_sec - _mark_cleanup_start_sec) * 1000.0;
074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	1658 _concurrent_mark_cleanup_times_ms->add(elapsed_time_ms);
074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	1659 _cur_mark_stop_world_time_ms += elapsed_time_ms;
074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	1660 _prev_collection_pause_end_ms += elapsed_time_ms;
074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	1661 _mmu_tracker->add_pause(_mark_cleanup_start_sec, end_sec, true);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1662 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1663
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1664 // Add the heap region at the head of the non-incremental collection set
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1665 void G1CollectorPolicy::add_old_region_to_cset(HeapRegion* hr) {
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1666 assert(_inc_cset_build_state == Active, "Precondition");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1667 assert(!hr->is_young(), "non-incremental add of young region");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1668
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1669 assert(!hr->in_collection_set(), "should not already be in the CSet");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1670 hr->set_in_collection_set(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1671 hr->set_next_in_collection_set(_collection_set);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1672 _collection_set = hr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1673 _collection_set_bytes_used_before += hr->used();
526 818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 470 diff changeset	1674 _g1->register_region_with_in_cset_fast_test(hr);
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1675 size_t rs_length = hr->rem_set()->occupied();
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1676 _recorded_rs_lengths += rs_length;
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1677 _old_cset_region_length += 1;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1678 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1679
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1680 // Initialize the per-collection-set information
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1681 void G1CollectorPolicy::start_incremental_cset_building() {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1682 assert(_inc_cset_build_state == Inactive, "Precondition");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1683
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1684 _inc_cset_head = NULL;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1685 _inc_cset_tail = NULL;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1686 _inc_cset_bytes_used_before = 0;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1687
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1688 _inc_cset_max_finger = 0;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1689 _inc_cset_recorded_rs_lengths = 0;
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1690 _inc_cset_recorded_rs_lengths_diffs = 0;
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1691 _inc_cset_predicted_elapsed_time_ms = 0.0;
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1692 _inc_cset_predicted_elapsed_time_ms_diffs = 0.0;
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1693 _inc_cset_build_state = Active;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1694 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1695
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1696 void G1CollectorPolicy::finalize_incremental_cset_building() {
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1697 assert(_inc_cset_build_state == Active, "Precondition");
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1698 assert(SafepointSynchronize::is_at_safepoint(), "should be at a safepoint");
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1699
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1700 // The two "main" fields, _inc_cset_recorded_rs_lengths and
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1701 // _inc_cset_predicted_elapsed_time_ms, are updated by the thread
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1702 // that adds a new region to the CSet. Further updates by the
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1703 // concurrent refinement thread that samples the young RSet lengths
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1704 // are accumulated in the *_diffs fields. Here we add the diffs to
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1705 // the "main" fields.
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1706
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1707 if (_inc_cset_recorded_rs_lengths_diffs >= 0) {
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1708 _inc_cset_recorded_rs_lengths += _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	1709 } else {
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1710 // This is defensive. The diff should in theory be always positive
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1711 // as RSets can only grow between GCs. However, given that we
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1712 // sample their size concurrently with other threads updating them
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1713 // it's possible that we might get the wrong size back, which
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1714 // could make the calculations somewhat inaccurate.
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1715 size_t diffs = (size_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	1716 if (_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	1717 _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	1718 } else {
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1719 _inc_cset_recorded_rs_lengths = 0;
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1720 }
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1721 }
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1722 _inc_cset_predicted_elapsed_time_ms +=
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1723 _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	1724
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1725 _inc_cset_recorded_rs_lengths_diffs = 0;
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1726 _inc_cset_predicted_elapsed_time_ms_diffs = 0.0;
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1727 }
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1728
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1729 void G1CollectorPolicy::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: 1391 diff changeset	1730 // This routine is used when:
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1731 // * adding survivor regions to the incremental cset at the end of an
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1732 // evacuation pause,
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1733 // * adding the current allocation region to the incremental cset
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1734 // when it is retired, and
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1735 // * updating existing policy information for a region in the
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1736 // incremental cset via young list RSet sampling.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1737 // Therefore this routine may be called at a safepoint by the
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1738 // VM thread, or in-between safepoints by mutator threads (when
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1739 // retiring the current allocation region) or a concurrent
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1740 // refine thread (RSet sampling).
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1741
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1742 double region_elapsed_time_ms = predict_region_elapsed_time_ms(hr, gcs_are_young());
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1743 size_t used_bytes = hr->used();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1744 _inc_cset_recorded_rs_lengths += rs_length;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1745 _inc_cset_predicted_elapsed_time_ms += region_elapsed_time_ms;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1746 _inc_cset_bytes_used_before += used_bytes;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1747
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1748 // Cache the values we have added to the aggregated informtion
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1749 // in the heap region in case we have to remove this region from
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1750 // the incremental collection set, or it is updated by the
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1751 // rset sampling code
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1752 hr->set_recorded_rs_length(rs_length);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1753 hr->set_predicted_elapsed_time_ms(region_elapsed_time_ms);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1754 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1755
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1756 void G1CollectorPolicy::update_incremental_cset_info(HeapRegion* hr,
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1757 size_t new_rs_length) {
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1758 // Update the CSet information that is dependent on the new RS length
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1759 assert(hr->is_young(), "Precondition");
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1760 assert(!SafepointSynchronize::is_at_safepoint(),
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1761 "should not be at a safepoint");
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1762
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1763 // We could have updated _inc_cset_recorded_rs_lengths and
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1764 // _inc_cset_predicted_elapsed_time_ms directly but we'd need to do
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1765 // that atomically, as this code is executed by a concurrent
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1766 // refinement thread, potentially concurrently with a mutator thread
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1767 // allocating a new region and also updating the same fields. To
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1768 // avoid the atomic operations we accumulate these updates on two
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1769 // separate fields (*_diffs) and we'll just add them to the "main"
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1770 // fields 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	1771
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1772 ssize_t old_rs_length = (ssize_t) hr->recorded_rs_length();
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1773 ssize_t rs_lengths_diff = (ssize_t) new_rs_length - old_rs_length;
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1774 _inc_cset_recorded_rs_lengths_diffs += rs_lengths_diff;
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1775
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1776 double old_elapsed_time_ms = hr->predicted_elapsed_time_ms();
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1777 double new_region_elapsed_time_ms = predict_region_elapsed_time_ms(hr, gcs_are_young());
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1778 double elapsed_ms_diff = new_region_elapsed_time_ms - old_elapsed_time_ms;
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1779 _inc_cset_predicted_elapsed_time_ms_diffs += elapsed_ms_diff;
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1780
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1781 hr->set_recorded_rs_length(new_rs_length);
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1782 hr->set_predicted_elapsed_time_ms(new_region_elapsed_time_ms);
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1783 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1784
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1785 void G1CollectorPolicy::add_region_to_incremental_cset_common(HeapRegion* hr) {
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1786 assert(hr->is_young(), "invariant");
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1787 assert(hr->young_index_in_cset() > -1, "should have already been set");
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1788 assert(_inc_cset_build_state == Active, "Precondition");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1789
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1790 // We need to clear and set the cached recorded/cached collection set
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1791 // information in the heap region here (before the region gets added
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1792 // to the collection set). An individual heap region's cached values
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1793 // are calculated, aggregated with the policy collection set info,
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1794 // and cached in the heap region here (initially) and (subsequently)
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1795 // by the Young List sampling code.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1796
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1797 size_t rs_length = hr->rem_set()->occupied();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1798 add_to_incremental_cset_info(hr, rs_length);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1799
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1800 HeapWord* hr_end = hr->end();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1801 _inc_cset_max_finger = MAX2(_inc_cset_max_finger, hr_end);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1802
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1803 assert(!hr->in_collection_set(), "invariant");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1804 hr->set_in_collection_set(true);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1805 assert( hr->next_in_collection_set() == NULL, "invariant");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1806
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1807 _g1->register_region_with_in_cset_fast_test(hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1808 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1809
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1810 // Add the region at the RHS of the incremental cset
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1811 void G1CollectorPolicy::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: 1391 diff changeset	1812 // We should only ever be appending survivors at the end of a pause
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1813 assert( hr->is_survivor(), "Logic");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1814
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1815 // Do the 'common' stuff
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1816 add_region_to_incremental_cset_common(hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1817
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1818 // Now add the region at the right hand side
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1819 if (_inc_cset_tail == NULL) {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1820 assert(_inc_cset_head == NULL, "invariant");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1821 _inc_cset_head = hr;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1822 } else {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1823 _inc_cset_tail->set_next_in_collection_set(hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1824 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1825 _inc_cset_tail = hr;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1826 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1827
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1828 // Add the region to the LHS of the incremental cset
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1829 void G1CollectorPolicy::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: 1391 diff changeset	1830 // Survivors should be added to the RHS at the end of a pause
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1831 assert(!hr->is_survivor(), "Logic");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1832
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1833 // Do the 'common' stuff
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1834 add_region_to_incremental_cset_common(hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1835
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1836 // Add the region at the left hand side
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1837 hr->set_next_in_collection_set(_inc_cset_head);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1838 if (_inc_cset_head == NULL) {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1839 assert(_inc_cset_tail == NULL, "Invariant");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1840 _inc_cset_tail = hr;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1841 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1842 _inc_cset_head = hr;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1843 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1844
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1845 #ifndef PRODUCT
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1846 void G1CollectorPolicy::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: 1391 diff changeset	1847 assert(list_head == inc_cset_head() \|\| list_head == collection_set(), "must be");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1848
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1849 st->print_cr("\nCollection_set:");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1850 HeapRegion* csr = list_head;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1851 while (csr != NULL) {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1852 HeapRegion* next = csr->next_in_collection_set();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1853 assert(csr->in_collection_set(), "bad CS");
6027 8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1854 st->print_cr(" "HR_FORMAT", P: "PTR_FORMAT "N: "PTR_FORMAT", age: %4d",
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1855 HR_FORMAT_PARAMS(csr),
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1856 csr->prev_top_at_mark_start(), csr->next_top_at_mark_start(),
8a2e5a6a19a4 7143490: G1: Remove HeapRegion::_top_at_conc_mark_count johnc parents: 6011 diff changeset	1857 csr->age_in_surv_rate_group_cond());
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1858 csr = next;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1859 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1860 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1861 #endif // !PRODUCT
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1862
8681 27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1863 double G1CollectorPolicy::reclaimable_bytes_perc(size_t reclaimable_bytes) {
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1864 // Returns the given amount of reclaimable bytes (that represents
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1865 // the amount of reclaimable space still to be collected) as a
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1866 // percentage of the current heap capacity.
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1867 size_t capacity_bytes = _g1->capacity();
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1868 return (double) reclaimable_bytes * 100.0 / (double) capacity_bytes;
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1869 }
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1870
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1871 bool G1CollectorPolicy::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	1872 const char* false_action_str) {
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1873 CollectionSetChooser* cset_chooser = _collectionSetChooser;
6011 f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	1874 if (cset_chooser->is_empty()) {
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1875 ergo_verbose0(ErgoMixedGCs,
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1876 false_action_str,
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1877 ergo_format_reason("candidate old regions not available"));
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1878 return false;
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1879 }
8681 27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1880
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1881 // Is the amount of uncollected reclaimable space above G1HeapWastePercent?
6011 f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	1882 size_t reclaimable_bytes = cset_chooser->remaining_reclaimable_bytes();
8681 27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1883 double reclaimable_perc = reclaimable_bytes_perc(reclaimable_bytes);
5964 21595f05bc93 7146246: G1: expose some of the -XX flags that drive which old regions to collect during mixed GCs tonyp parents: 4912 diff changeset	1884 double threshold = (double) G1HeapWastePercent;
8681 27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1885 if (reclaimable_perc <= threshold) {
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1886 ergo_verbose4(ErgoMixedGCs,
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1887 false_action_str,
8681 27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1888 ergo_format_reason("reclaimable percentage not over threshold")
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1889 ergo_format_region("candidate old regions")
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1890 ergo_format_byte_perc("reclaimable")
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1891 ergo_format_perc("threshold"),
6011 f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	1892 cset_chooser->remaining_regions(),
8681 27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1893 reclaimable_bytes,
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1894 reclaimable_perc, threshold);
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1895 return false;
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1896 }
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1897
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1898 ergo_verbose4(ErgoMixedGCs,
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1899 true_action_str,
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1900 ergo_format_reason("candidate old regions available")
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1901 ergo_format_region("candidate old regions")
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1902 ergo_format_byte_perc("reclaimable")
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1903 ergo_format_perc("threshold"),
6011 f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	1904 cset_chooser->remaining_regions(),
8681 27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1905 reclaimable_bytes,
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1906 reclaimable_perc, threshold);
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1907 return true;
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1908 }
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	1909
8681 27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1910 uint G1CollectorPolicy::calc_min_old_cset_length() {
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1911 // The min old CSet region bound is based on the maximum desired
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1912 // number of mixed GCs after a cycle. I.e., even if some old regions
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1913 // look expensive, we should add them to the CSet anyway to make
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1914 // sure we go through the available old regions in no more than the
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1915 // maximum desired number of mixed GCs.
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1916 //
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1917 // The calculation is based on the number of marked regions we added
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1918 // to the CSet chooser in the first place, not how many remain, so
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1919 // that the result is the same during all mixed GCs that follow a cycle.
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1920
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1921 const size_t region_num = (size_t) _collectionSetChooser->length();
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1922 const size_t gc_num = (size_t) MAX2(G1MixedGCCountTarget, (uintx) 1);
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1923 size_t result = region_num / gc_num;
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1924 // emulate ceiling
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1925 if (result * gc_num < region_num) {
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1926 result += 1;
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1927 }
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1928 return (uint) result;
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1929 }
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1930
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1931 uint G1CollectorPolicy::calc_max_old_cset_length() {
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1932 // The max old CSet region bound is based on the threshold expressed
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1933 // as a percentage of the heap size. I.e., it should bound the
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1934 // number of old regions added to the CSet irrespective of how many
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1935 // of them are available.
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1936
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1937 G1CollectedHeap* g1h = G1CollectedHeap::heap();
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1938 const size_t region_num = g1h->n_regions();
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1939 const size_t perc = (size_t) G1OldCSetRegionThresholdPercent;
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1940 size_t result = region_num * perc / 100;
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1941 // emulate ceiling
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1942 if (100 * result < region_num * perc) {
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1943 result += 1;
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1944 }
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1945 return (uint) result;
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1946 }
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1947
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1948
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10291 diff changeset	1949 void G1CollectorPolicy::finalize_cset(double target_pause_time_ms, EvacuationInfo& evacuation_info) {
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1950 double young_start_time_sec = os::elapsedTime();
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1951
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1952 YoungList* young_list = _g1->young_list();
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1953 finalize_incremental_cset_building();
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1954
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	1955 guarantee(target_pause_time_ms > 0.0,
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	1956 err_msg("target_pause_time_ms = %1.6lf should be positive",
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	1957 target_pause_time_ms));
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	1958 guarantee(_collection_set == NULL, "Precondition");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1959
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1960 double base_time_ms = predict_base_elapsed_time_ms(_pending_cards);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1961 double predicted_pause_time_ms = base_time_ms;
8681 27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	1962 double time_remaining_ms = MAX2(target_pause_time_ms - base_time_ms, 0.0);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1963
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1964 ergo_verbose4(ErgoCSetConstruction \| ErgoHigh,
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1965 "start choosing CSet",
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1966 ergo_format_size("_pending_cards")
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1967 ergo_format_ms("predicted base time")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1968 ergo_format_ms("remaining time")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1969 ergo_format_ms("target pause time"),
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1970 _pending_cards, base_time_ms, time_remaining_ms, target_pause_time_ms);
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1971
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1972 _last_gc_was_young = gcs_are_young() ? true : false;
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1973
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1974 if (_last_gc_was_young) {
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	1975 _trace_gen0_time_data.increment_young_collection_count();
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1976 } else {
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	1977 _trace_gen0_time_data.increment_mixed_collection_count();
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1978 }
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1979
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1980 // The young list is laid with the survivor regions from the previous
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1981 // pause are appended to the RHS of the young list, i.e.
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1982 // [Newly Young Regions ++ Survivors from last pause].
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1983
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	1984 uint survivor_region_length = young_list->survivor_length();
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	1985 uint eden_region_length = young_list->length() - survivor_region_length;
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1986 init_cset_region_lengths(eden_region_length, survivor_region_length);
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1987
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	1988 HeapRegion* hr = young_list->first_survivor_region();
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1989 while (hr != NULL) {
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1990 assert(hr->is_survivor(), "badly formed young list");
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1991 hr->set_young();
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1992 hr = hr->get_next_young_region();
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1993 }
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1994
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1995 // Clear the fields that point to the survivor list - they are all young now.
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1996 young_list->clear_survivors();
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1997
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1998 _collection_set = _inc_cset_head;
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1999 _collection_set_bytes_used_before = _inc_cset_bytes_used_before;
8681 27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2000 time_remaining_ms = MAX2(time_remaining_ms - _inc_cset_predicted_elapsed_time_ms, 0.0);
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2001 predicted_pause_time_ms += _inc_cset_predicted_elapsed_time_ms;
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2002
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2003 ergo_verbose3(ErgoCSetConstruction \| ErgoHigh,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2004 "add young regions to CSet",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2005 ergo_format_region("eden")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2006 ergo_format_region("survivors")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2007 ergo_format_ms("predicted young region time"),
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	2008 eden_region_length, survivor_region_length,
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2009 _inc_cset_predicted_elapsed_time_ms);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2010
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2011 // The number of recorded young regions is the incremental
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2012 // collection set's current size
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2013 set_recorded_rs_lengths(_inc_cset_recorded_rs_lengths);
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2014
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2015 double young_end_time_sec = os::elapsedTime();
6628 bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	2016 phase_times()->record_young_cset_choice_time_ms((young_end_time_sec - young_start_time_sec) * 1000.0);
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2017
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	2018 // Set the start of the non-young choice time.
7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	2019 double non_young_start_time_sec = young_end_time_sec;
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2020
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	2021 if (!gcs_are_young()) {
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2022 CollectionSetChooser* cset_chooser = _collectionSetChooser;
6011 f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	2023 cset_chooser->verify();
8681 27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2024 const uint min_old_cset_length = calc_min_old_cset_length();
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2025 const uint max_old_cset_length = calc_max_old_cset_length();
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	2026
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6007 diff changeset	2027 uint expensive_region_num = 0;
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2028 bool check_time_remaining = adaptive_young_list_length();
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	2029
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2030 HeapRegion* hr = cset_chooser->peek();
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2031 while (hr != NULL) {
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2032 if (old_cset_region_length() >= max_old_cset_length) {
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2033 // Added maximum number of old regions to the CSet.
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2034 ergo_verbose2(ErgoCSetConstruction,
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2035 "finish adding old regions to CSet",
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2036 ergo_format_reason("old CSet region num reached max")
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2037 ergo_format_region("old")
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2038 ergo_format_region("max"),
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2039 old_cset_region_length(), max_old_cset_length);
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2040 break;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2041 }
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2042
8681 27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2043
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2044 // Stop adding regions if the remaining reclaimable space is
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2045 // not above G1HeapWastePercent.
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2046 size_t reclaimable_bytes = cset_chooser->remaining_reclaimable_bytes();
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2047 double reclaimable_perc = reclaimable_bytes_perc(reclaimable_bytes);
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2048 double threshold = (double) G1HeapWastePercent;
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2049 if (reclaimable_perc <= threshold) {
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2050 // We've added enough old regions that the amount of uncollected
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2051 // reclaimable space is at or below the waste threshold. Stop
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2052 // adding old regions to the CSet.
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2053 ergo_verbose5(ErgoCSetConstruction,
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2054 "finish adding old regions to CSet",
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2055 ergo_format_reason("reclaimable percentage not over threshold")
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2056 ergo_format_region("old")
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2057 ergo_format_region("max")
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2058 ergo_format_byte_perc("reclaimable")
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2059 ergo_format_perc("threshold"),
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2060 old_cset_region_length(),
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2061 max_old_cset_length,
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2062 reclaimable_bytes,
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2063 reclaimable_perc, threshold);
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2064 break;
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2065 }
27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2066
6611 7383557659bd 7185699: G1: Prediction model discrepancies johnc parents: 6254 diff changeset	2067 double predicted_time_ms = predict_region_elapsed_time_ms(hr, gcs_are_young());
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2068 if (check_time_remaining) {
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2069 if (predicted_time_ms > time_remaining_ms) {
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2070 // Too expensive for the current CSet.
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2071
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2072 if (old_cset_region_length() >= min_old_cset_length) {
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2073 // We have added the minimum number of old regions to the CSet,
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2074 // we are done with this CSet.
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2075 ergo_verbose4(ErgoCSetConstruction,
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2076 "finish adding old regions to CSet",
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2077 ergo_format_reason("predicted time is too high")
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2078 ergo_format_ms("predicted time")
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2079 ergo_format_ms("remaining time")
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2080 ergo_format_region("old")
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2081 ergo_format_region("min"),
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2082 predicted_time_ms, time_remaining_ms,
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2083 old_cset_region_length(), min_old_cset_length);
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2084 break;
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2085 }
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2086
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2087 // We'll add it anyway given that we haven't reached the
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2088 // minimum number of old regions.
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2089 expensive_region_num += 1;
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2090 }
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2091 } else {
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2092 if (old_cset_region_length() >= min_old_cset_length) {
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2093 // In the non-auto-tuning case, we'll finish adding regions
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2094 // to the CSet if we reach the minimum.
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2095 ergo_verbose2(ErgoCSetConstruction,
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2096 "finish adding old regions to CSet",
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2097 ergo_format_reason("old CSet region num reached min")
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2098 ergo_format_region("old")
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2099 ergo_format_region("min"),
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2100 old_cset_region_length(), min_old_cset_length);
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2101 break;
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2102 }
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2103 }
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2104
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2105 // We will add this region to the CSet.
8681 27714220e50e 8007036: G1: Too many old regions added to last mixed GC johnc parents: 8094 diff changeset	2106 time_remaining_ms = MAX2(time_remaining_ms - predicted_time_ms, 0.0);
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2107 predicted_pause_time_ms += predicted_time_ms;
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2108 cset_chooser->remove_and_move_to_next(hr);
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2109 _g1->old_set_remove(hr);
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2110 add_old_region_to_cset(hr);
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2111
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2112 hr = cset_chooser->peek();
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2113 }
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2114 if (hr == NULL) {
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2115 ergo_verbose0(ErgoCSetConstruction,
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2116 "finish adding old regions to CSet",
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2117 ergo_format_reason("candidate old regions not available"));
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2118 }
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2119
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2120 if (expensive_region_num > 0) {
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2121 // We print the information once here at the end, predicated on
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2122 // whether we added any apparently expensive regions or not, to
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2123 // avoid generating output per region.
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2124 ergo_verbose4(ErgoCSetConstruction,
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2125 "added expensive regions to CSet",
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2126 ergo_format_reason("old CSet region num not reached min")
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2127 ergo_format_region("old")
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2128 ergo_format_region("expensive")
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2129 ergo_format_region("min")
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2130 ergo_format_ms("remaining time"),
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2131 old_cset_region_length(),
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2132 expensive_region_num,
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2133 min_old_cset_length,
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2134 time_remaining_ms);
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2135 }
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4837 diff changeset	2136
6011 f7a8920427a6 7145441: G1: collection set chooser-related cleanup tonyp parents: 6010 diff changeset	2137 cset_chooser->verify();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2138 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2139
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2140 stop_incremental_cset_building();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2141
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2142 ergo_verbose5(ErgoCSetConstruction,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2143 "finish choosing CSet",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2144 ergo_format_region("eden")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2145 ergo_format_region("survivors")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2146 ergo_format_region("old")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2147 ergo_format_ms("predicted pause time")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2148 ergo_format_ms("target pause time"),
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	2149 eden_region_length, survivor_region_length,
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	2150 old_cset_region_length(),
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2151 predicted_pause_time_ms, target_pause_time_ms);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2152
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2153 double non_young_end_time_sec = os::elapsedTime();
6628 bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	2154 phase_times()->record_non_young_cset_choice_time_ms((non_young_end_time_sec - non_young_start_time_sec) * 1000.0);
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10291 diff changeset	2155 evacuation_info.set_collectionset_regions(cset_region_length());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2156 }
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2157
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2158 void TraceGen0TimeData::record_start_collection(double time_to_stop_the_world_ms) {
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2159 if(TraceGen0Time) {
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2160 _all_stop_world_times_ms.add(time_to_stop_the_world_ms);
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2161 }
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2162 }
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2163
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2164 void TraceGen0TimeData::record_yield_time(double yield_time_ms) {
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2165 if(TraceGen0Time) {
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2166 _all_yield_times_ms.add(yield_time_ms);
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2167 }
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2168 }
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2169
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2170 void TraceGen0TimeData::record_end_collection(double pause_time_ms, G1GCPhaseTimes* phase_times) {
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2171 if(TraceGen0Time) {
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2172 _total.add(pause_time_ms);
922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2173 _other.add(pause_time_ms - phase_times->accounted_time_ms());
6628 bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	2174 _root_region_scan_wait.add(phase_times->root_region_scan_wait_time_ms());
bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	2175 _parallel.add(phase_times->cur_collection_par_time_ms());
bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	2176 _ext_root_scan.add(phase_times->average_last_ext_root_scan_time());
bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	2177 _satb_filtering.add(phase_times->average_last_satb_filtering_times_ms());
bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	2178 _update_rs.add(phase_times->average_last_update_rs_time());
bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	2179 _scan_rs.add(phase_times->average_last_scan_rs_time());
bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	2180 _obj_copy.add(phase_times->average_last_obj_copy_time());
bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	2181 _termination.add(phase_times->average_last_termination_time());
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2182
6628 bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	2183 double parallel_known_time = phase_times->average_last_ext_root_scan_time() +
bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	2184 phase_times->average_last_satb_filtering_times_ms() +
bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	2185 phase_times->average_last_update_rs_time() +
bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	2186 phase_times->average_last_scan_rs_time() +
bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	2187 phase_times->average_last_obj_copy_time() +
bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	2188 + phase_times->average_last_termination_time();
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2189
6628 bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	2190 double parallel_other_time = phase_times->cur_collection_par_time_ms() - parallel_known_time;
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2191 _parallel_other.add(parallel_other_time);
6628 bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	2192 _clear_ct.add(phase_times->cur_clear_ct_time_ms());
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2193 }
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2194 }
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2195
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2196 void TraceGen0TimeData::increment_young_collection_count() {
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2197 if(TraceGen0Time) {
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2198 ++_young_pause_num;
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2199 }
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2200 }
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2201
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2202 void TraceGen0TimeData::increment_mixed_collection_count() {
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2203 if(TraceGen0Time) {
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2204 ++_mixed_pause_num;
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2205 }
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2206 }
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2207
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2208 void TraceGen0TimeData::print_summary(const char* str,
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2209 const NumberSeq* seq) const {
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2210 double sum = seq->sum();
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2211 gclog_or_tty->print_cr("%-27s = %8.2lf s (avg = %8.2lf ms)",
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2212 str, sum / 1000.0, seq->avg());
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2213 }
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2214
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2215 void TraceGen0TimeData::print_summary_sd(const char* str,
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2216 const NumberSeq* seq) const {
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2217 print_summary(str, seq);
922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2218 gclog_or_tty->print_cr("%+45s = %5d, std dev = %8.2lf ms, max = %8.2lf ms)",
922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2219 "(num", seq->num(), seq->sd(), seq->maximum());
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2220 }
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2221
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2222 void TraceGen0TimeData::print() const {
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2223 if (!TraceGen0Time) {
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2224 return;
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2225 }
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2226
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2227 gclog_or_tty->print_cr("ALL PAUSES");
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2228 print_summary_sd(" Total", &_total);
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17866 diff changeset	2229 gclog_or_tty->cr();
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17866 diff changeset	2230 gclog_or_tty->cr();
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2231 gclog_or_tty->print_cr(" Young GC Pauses: %8d", _young_pause_num);
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2232 gclog_or_tty->print_cr(" Mixed GC Pauses: %8d", _mixed_pause_num);
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17866 diff changeset	2233 gclog_or_tty->cr();
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2234
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2235 gclog_or_tty->print_cr("EVACUATION PAUSES");
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2236
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2237 if (_young_pause_num == 0 && _mixed_pause_num == 0) {
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2238 gclog_or_tty->print_cr("none");
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2239 } else {
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2240 print_summary_sd(" Evacuation Pauses", &_total);
922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2241 print_summary(" Root Region Scan Wait", &_root_region_scan_wait);
922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2242 print_summary(" Parallel Time", &_parallel);
922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2243 print_summary(" Ext Root Scanning", &_ext_root_scan);
922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2244 print_summary(" SATB Filtering", &_satb_filtering);
922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2245 print_summary(" Update RS", &_update_rs);
922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2246 print_summary(" Scan RS", &_scan_rs);
922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2247 print_summary(" Object Copy", &_obj_copy);
922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2248 print_summary(" Termination", &_termination);
922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2249 print_summary(" Parallel Other", &_parallel_other);
922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2250 print_summary(" Clear CT", &_clear_ct);
922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2251 print_summary(" Other", &_other);
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2252 }
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17866 diff changeset	2253 gclog_or_tty->cr();
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2254
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2255 gclog_or_tty->print_cr("MISC");
6219 922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2256 print_summary_sd(" Stop World", &_all_stop_world_times_ms);
922993931b3d 7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause brutisso parents: 6109 diff changeset	2257 print_summary_sd(" Yields", &_all_yield_times_ms);
6109 bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2258 }
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2259
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2260 void TraceGen1TimeData::record_full_collection(double full_gc_time_ms) {
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2261 if (TraceGen1Time) {
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2262 _all_full_gc_times.add(full_gc_time_ms);
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2263 }
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2264 }
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2265
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2266 void TraceGen1TimeData::print() const {
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2267 if (!TraceGen1Time) {
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2268 return;
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2269 }
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2270
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2271 if (_all_full_gc_times.num() > 0) {
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2272 gclog_or_tty->print("\n%4d full_gcs: total time = %8.2f s",
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2273 _all_full_gc_times.num(),
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2274 _all_full_gc_times.sum() / 1000.0);
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2275 gclog_or_tty->print_cr(" (avg = %8.2fms).", _all_full_gc_times.avg());
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2276 gclog_or_tty->print_cr(" [std. dev = %8.2f ms, max = %8.2f ms]",
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2277 _all_full_gc_times.sd(),
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2278 _all_full_gc_times.maximum());
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2279 }
bbc900c2482a 7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering brutisso parents: 6064 diff changeset	2280 }

Mercurial > hg > truffle

annotate src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp @ 20211:82693fb204a5