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

annotate src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp @ 4837:eff609af17d7

7127706: G1: re-enable survivors during the initial-mark pause Summary: Re-enable survivors during the initial-mark pause. Afterwards, the concurrent marking threads have to scan them and mark everything reachable from them. The next GC will have to wait for the survivors to be scanned. Reviewed-by: brutisso, johnc

author	tonyp
date	Wed, 25 Jan 2012 12:58:23 -0500
parents	6a78aa6ac1ff
children	a9647476d1a4

rev	line source
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1 /*
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4729 diff changeset	2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	7 * published by the Free Software Foundation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	8 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	13 * accompanied this code).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	14 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1394 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1394 diff changeset	20 * or visit www.oracle.com if you need additional information or have any
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1394 diff changeset	21 * questions.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	22 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	23 */
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	24
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	25 #include "precompiled.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	26 #include "gc_implementation/g1/concurrentG1Refine.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	27 #include "gc_implementation/g1/concurrentMark.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	28 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	29 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	30 #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	31 #include "gc_implementation/g1/g1ErgoVerbose.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	32 #include "gc_implementation/g1/heapRegionRemSet.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	33 #include "gc_implementation/shared/gcPolicyCounters.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	34 #include "runtime/arguments.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	35 #include "runtime/java.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	36 #include "runtime/mutexLocker.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	37 #include "utilities/debug.hpp"
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	38
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	39 // Different defaults for different number of GC threads
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	40 // 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	41 // numbers of GC threads and choosing them based on the results
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	42
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	43 // all the same
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	44 static double rs_length_diff_defaults[] = {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	45 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	46 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	47
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	48 static double cost_per_card_ms_defaults[] = {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	49 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	50 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	51
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	52 // all the same
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	53 static double young_cards_per_entry_ratio_defaults[] = {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	54 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	55 };
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 static double cost_per_entry_ms_defaults[] = {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	58 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	59 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	60
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	61 static double cost_per_byte_ms_defaults[] = {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	62 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	63 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	64
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	65 // these should be pretty consistent
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	66 static double constant_other_time_ms_defaults[] = {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	67 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	68 };
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 static double young_other_cost_per_region_ms_defaults[] = {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	72 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	73 };
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 static double non_young_other_cost_per_region_ms_defaults[] = {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	76 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	77 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	78
2363 c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	79 // Help class for avoiding interleaved logging
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	80 class LineBuffer: public StackObj {
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	81
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	82 private:
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	83 static const int BUFFER_LEN = 1024;
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	84 static const int INDENT_CHARS = 3;
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	85 char _buffer[BUFFER_LEN];
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	86 int _indent_level;
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	87 int _cur;
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	88
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	89 void vappend(const char* format, va_list ap) {
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	90 int res = vsnprintf(&_buffer[_cur], BUFFER_LEN - _cur, format, ap);
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	91 if (res != -1) {
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	92 _cur += res;
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	93 } else {
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	94 DEBUG_ONLY(warning("buffer too small in LineBuffer");)
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	95 _buffer[BUFFER_LEN -1] = 0;
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	96 _cur = BUFFER_LEN; // vsnprintf above should not add to _buffer if we are called again
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	97 }
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	98 }
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	99
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	100 public:
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	101 explicit LineBuffer(int indent_level): _indent_level(indent_level), _cur(0) {
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	102 for (; (_cur < BUFFER_LEN && _cur < (_indent_level * INDENT_CHARS)); _cur++) {
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	103 _buffer[_cur] = ' ';
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	104 }
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	105 }
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	106
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	107 #ifndef PRODUCT
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	108 ~LineBuffer() {
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	109 assert(_cur == _indent_level * INDENT_CHARS, "pending data in buffer - append_and_print_cr() not called?");
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	110 }
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	111 #endif
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	112
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	113 void append(const char* format, ...) {
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	114 va_list ap;
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	115 va_start(ap, format);
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	116 vappend(format, ap);
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	117 va_end(ap);
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	118 }
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	119
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	120 void append_and_print_cr(const char* format, ...) {
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	121 va_list ap;
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	122 va_start(ap, format);
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	123 vappend(format, ap);
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	124 va_end(ap);
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	125 gclog_or_tty->print_cr("%s", _buffer);
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	126 _cur = _indent_level * INDENT_CHARS;
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	127 }
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	128 };
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	129
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	130 G1CollectorPolicy::G1CollectorPolicy() :
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1779 diff changeset	131 _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	132 ? ParallelGCThreads : 1),
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1779 diff changeset	133
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	134 _recent_gc_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	135 _all_pause_times_ms(new NumberSeq()),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	136 _stop_world_start(0.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	137 _all_stop_world_times_ms(new NumberSeq()),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	138 _all_yield_times_ms(new NumberSeq()),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	139
677 96b229c54d1e 6543938: G1: remove the concept of popularity apetrusenko parents: 648 diff changeset	140 _summary(new Summary()),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	141
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3976 diff changeset	142 _cur_clear_ct_time_ms(0.0),
4097 dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4096 diff changeset	143 _mark_closure_time_ms(0.0),
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	144 _root_region_scan_wait_time_ms(0.0),
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3976 diff changeset	145
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3976 diff changeset	146 _cur_ref_proc_time_ms(0.0),
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3976 diff changeset	147 _cur_ref_enq_time_ms(0.0),
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3976 diff changeset	148
890 6cb8e9df7174 6819077: G1: first GC thread coming late into the GC. johnc parents: 845 diff changeset	149 #ifndef PRODUCT
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC. johnc parents: 845 diff changeset	150 _min_clear_cc_time_ms(-1.0),
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC. johnc parents: 845 diff changeset	151 _max_clear_cc_time_ms(-1.0),
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC. johnc parents: 845 diff changeset	152 _cur_clear_cc_time_ms(0.0),
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC. johnc parents: 845 diff changeset	153 _cum_clear_cc_time_ms(0.0),
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC. johnc parents: 845 diff changeset	154 _num_cc_clears(0L),
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC. johnc parents: 845 diff changeset	155 #endif
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	156
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	157 _aux_num(10),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	158 _all_aux_times_ms(new NumberSeq[_aux_num]),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	159 _cur_aux_start_times_ms(new double[_aux_num]),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	160 _cur_aux_times_ms(new double[_aux_num]),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	161 _cur_aux_times_set(new bool[_aux_num]),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	162
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	163 _concurrent_mark_remark_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	164 _concurrent_mark_cleanup_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	165
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	166 _alloc_rate_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	167 _prev_collection_pause_end_ms(0.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	168 _pending_card_diff_seq(new TruncatedSeq(TruncatedSeqLength)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	169 _rs_length_diff_seq(new TruncatedSeq(TruncatedSeqLength)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	170 _cost_per_card_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	171 _young_cards_per_entry_ratio_seq(new TruncatedSeq(TruncatedSeqLength)),
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	172 _mixed_cards_per_entry_ratio_seq(new TruncatedSeq(TruncatedSeqLength)),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	173 _cost_per_entry_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	174 _mixed_cost_per_entry_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	175 _cost_per_byte_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	176 _cost_per_byte_ms_during_cm_seq(new TruncatedSeq(TruncatedSeqLength)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	177 _constant_other_time_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	178 _young_other_cost_per_region_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	179 _non_young_other_cost_per_region_ms_seq(
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	180 new TruncatedSeq(TruncatedSeqLength)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	181
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	182 _pending_cards_seq(new TruncatedSeq(TruncatedSeqLength)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	183 _rs_lengths_seq(new TruncatedSeq(TruncatedSeqLength)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	184
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 677 diff changeset	185 _pause_time_target_ms((double) MaxGCPauseMillis),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	186
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	187 _gcs_are_young(true),
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	188 _young_pause_num(0),
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	189 _mixed_pause_num(0),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	190
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	191 _during_marking(false),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	192 _in_marking_window(false),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	193 _in_marking_window_im(false),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	194
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	195 _known_garbage_ratio(0.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	196 _known_garbage_bytes(0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	197
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	198 _young_gc_eff_seq(new TruncatedSeq(TruncatedSeqLength)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	199
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	200 _recent_prev_end_times_for_all_gcs_sec(
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	201 new TruncatedSeq(NumPrevPausesForHeuristics)),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	202
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	203 _recent_avg_pause_time_ratio(0.0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	204
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	205 _all_full_gc_times_ms(new NumberSeq()),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	206
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	207 _initiate_conc_mark_if_possible(false),
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	208 _during_initial_mark_pause(false),
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	209 _should_revert_to_young_gcs(false),
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	210 _last_young_gc(false),
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	211 _last_gc_was_young(false),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	212
3764 053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	213 _eden_bytes_before_gc(0),
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	214 _survivor_bytes_before_gc(0),
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	215 _capacity_before_gc(0),
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	216
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	217 _eden_cset_region_length(0),
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	218 _survivor_cset_region_length(0),
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	219 _old_cset_region_length(0),
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	220
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	221 _collection_set(NULL),
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	222 _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	223
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	224 // Incremental CSet attributes
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	225 _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	226 _inc_cset_head(NULL),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	227 _inc_cset_tail(NULL),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	228 _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	229 _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	230 _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	231 _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	232 _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	233 _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	234
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	235 #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	236 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	237 #endif // _MSC_VER
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	238
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	239 _short_lived_surv_rate_group(new SurvRateGroup(this, "Short Lived",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	240 G1YoungSurvRateNumRegionsSummary)),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	241 _survivor_surv_rate_group(new SurvRateGroup(this, "Survivor",
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	242 G1YoungSurvRateNumRegionsSummary)),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	243 // add here any more surv rate groups
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	244 _recorded_survivor_regions(0),
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	245 _recorded_survivor_head(NULL),
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	246 _recorded_survivor_tail(NULL),
1356 56507bcd639e 6937160: G1: should observe GCTimeRatio tonyp parents: 1285 diff changeset	247 _survivors_age_table(true),
56507bcd639e 6937160: G1: should observe GCTimeRatio tonyp parents: 1285 diff changeset	248
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	249 _gc_overhead_perc(0.0) {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	250
942 2c79770d1f6e 6819085: G1: use larger and/or user settable region size tonyp parents: 936 diff changeset	251 // 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	252 // 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	253 // so it's done as soon as possible.
2c79770d1f6e 6819085: G1: use larger and/or user settable region size tonyp parents: 936 diff changeset	254 HeapRegion::setup_heap_region_size(Arguments::min_heap_size());
1261 0414c1049f15 6923991: G1: improve scalability of RSet scanning iveresov parents: 1111 diff changeset	255 HeapRegionRemSet::setup_remset_size();
942 2c79770d1f6e 6819085: G1: use larger and/or user settable region size tonyp parents: 936 diff changeset	256
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	257 G1ErgoVerbose::initialize();
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	258 if (PrintAdaptiveSizePolicy) {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	259 // 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	260 G1ErgoVerbose::set_enabled(true);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	261 // 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	262 // 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	263 // changed in the future.
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	264 G1ErgoVerbose::set_level(ErgoHigh);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	265 } else {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	266 G1ErgoVerbose::set_enabled(false);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	267 }
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	268
1391 79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1388 diff changeset	269 // Verify PLAB sizes
3986 65a8ff39a6da 7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t johnc parents: 3982 diff changeset	270 const size_t region_size = HeapRegion::GrainWords;
1391 79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1388 diff changeset	271 if (YoungPLABSize > region_size \|\| OldPLABSize > region_size) {
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1388 diff changeset	272 char buffer[128];
3986 65a8ff39a6da 7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t johnc parents: 3982 diff changeset	273 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	274 OldPLABSize > region_size ? "Old" : "Young", region_size);
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1388 diff changeset	275 vm_exit_during_initialization(buffer);
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1388 diff changeset	276 }
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1388 diff changeset	277
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	278 _recent_prev_end_times_for_all_gcs_sec->add(os::elapsedTime());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	279 _prev_collection_pause_end_ms = os::elapsedTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	280
1611 215576b54709 6946048: G1: improvements to +PrintGCDetails output tonyp parents: 1610 diff changeset	281 _par_last_gc_worker_start_times_ms = new double[_parallel_gc_threads];
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	282 _par_last_ext_root_scan_times_ms = new double[_parallel_gc_threads];
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4729 diff changeset	283 _par_last_satb_filtering_times_ms = new double[_parallel_gc_threads];
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	284
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	285 _par_last_update_rs_times_ms = new double[_parallel_gc_threads];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	286 _par_last_update_rs_processed_buffers = new double[_parallel_gc_threads];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	287
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	288 _par_last_scan_rs_times_ms = new double[_parallel_gc_threads];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	289
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	290 _par_last_obj_copy_times_ms = new double[_parallel_gc_threads];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	291
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	292 _par_last_termination_times_ms = new double[_parallel_gc_threads];
1611 215576b54709 6946048: G1: improvements to +PrintGCDetails output tonyp parents: 1610 diff changeset	293 _par_last_termination_attempts = new double[_parallel_gc_threads];
215576b54709 6946048: G1: improvements to +PrintGCDetails output tonyp parents: 1610 diff changeset	294 _par_last_gc_worker_end_times_ms = new double[_parallel_gc_threads];
2430 5c0b591e1074 6948149: G1: Imbalance in termination times brutisso parents: 2363 diff changeset	295 _par_last_gc_worker_times_ms = new double[_parallel_gc_threads];
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	296 _par_last_gc_worker_other_times_ms = new double[_parallel_gc_threads];
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	297
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	298 // start conservatively
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 677 diff changeset	299 _expensive_region_limit_ms = 0.5 * (double) MaxGCPauseMillis;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	300
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	301 int index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	302 if (ParallelGCThreads == 0)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	303 index = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	304 else if (ParallelGCThreads > 8)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	305 index = 7;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	306 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	307 index = ParallelGCThreads - 1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	308
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	309 _pending_card_diff_seq->add(0.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	310 _rs_length_diff_seq->add(rs_length_diff_defaults[index]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	311 _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	312 _young_cards_per_entry_ratio_seq->add(
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	313 young_cards_per_entry_ratio_defaults[index]);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	314 _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	315 _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	316 _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	317 _young_other_cost_per_region_ms_seq->add(
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	318 young_other_cost_per_region_ms_defaults[index]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	319 _non_young_other_cost_per_region_ms_seq->add(
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	320 non_young_other_cost_per_region_ms_defaults[index]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	321
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	322 // 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	323 // 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	324 // 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	325 // 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	326 // 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	327 // 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	328 // 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	329 // 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	330 // 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	331
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	332 // 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	333 // 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	334 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	335 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	336 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	337 "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	338 }
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	339 }
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	340 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	341 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	342 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	343 "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	344 }
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	345 }
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	346
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	347 // 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	348 // 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	349 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	350 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	351 // 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	352 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	353 } 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	354 // 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	355 // 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	356 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	357 "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	358 }
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	359 }
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	360
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	361 // 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	362 // 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	363 // 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	364 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	365 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	366 }
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	367
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	368 // 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	369 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	370 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	371 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	372 "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	373 "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	374 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	375 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	376 }
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	377
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 677 diff changeset	378 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	379 double time_slice = (double) GCPauseIntervalMillis / 1000.0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	380 _mmu_tracker = new G1MMUTrackerQueue(time_slice, max_gc_time);
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 677 diff changeset	381 _sigma = (double) G1ConfidencePercent / 100.0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	382
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	383 // start conservatively (around 50ms is about right)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	384 _concurrent_mark_remark_times_ms->add(0.05);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	385 _concurrent_mark_cleanup_times_ms->add(0.20);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	386 _tenuring_threshold = MaxTenuringThreshold;
3868 ae73da50be4b 7081064: G1: remove develop params G1FixedSurvivorSpaceSize, G1FixedTenuringThreshold, and G1FixedEdenSize tonyp parents: 3867 diff changeset	387 // _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	388 // update_young_list_target_length() during initialization.
3868 ae73da50be4b 7081064: G1: remove develop params G1FixedSurvivorSpaceSize, G1FixedTenuringThreshold, and G1FixedEdenSize tonyp parents: 3867 diff changeset	389 _max_survivor_regions = 0;
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	390
1356 56507bcd639e 6937160: G1: should observe GCTimeRatio tonyp parents: 1285 diff changeset	391 assert(GCTimeRatio > 0,
56507bcd639e 6937160: G1: should observe GCTimeRatio tonyp parents: 1285 diff changeset	392 "we should have set it to a default value set_g1_gc_flags() "
56507bcd639e 6937160: G1: should observe GCTimeRatio tonyp parents: 1285 diff changeset	393 "if a user set it to 0");
56507bcd639e 6937160: G1: should observe GCTimeRatio tonyp parents: 1285 diff changeset	394 _gc_overhead_perc = 100.0 * (1.0 / (1.0 + GCTimeRatio));
56507bcd639e 6937160: G1: should observe GCTimeRatio tonyp parents: 1285 diff changeset	395
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	396 uintx reserve_perc = G1ReservePercent;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	397 // 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	398 if (reserve_perc > 50) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	399 reserve_perc = 50;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	400 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	401 "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	402 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	403 _reserve_factor = (double) reserve_perc / 100.0;
3920 af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	404 // 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	405 // 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	406 _reserve_regions = 0;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	407
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	408 initialize_all();
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	409 _collectionSetChooser = new CollectionSetChooser();
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	410 _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	411 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	412
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	413 void G1CollectorPolicy::initialize_flags() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	414 set_min_alignment(HeapRegion::GrainBytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	415 set_max_alignment(GenRemSet::max_alignment_constraint(rem_set_name()));
547 1e458753107d 6802413: G1: G1FixedSurvivorSpaceSize should be converted into regions in calculate_survivors_policy() apetrusenko parents: 545 diff changeset	416 if (SurvivorRatio < 1) {
1e458753107d 6802413: G1: G1FixedSurvivorSpaceSize should be converted into regions in calculate_survivors_policy() apetrusenko parents: 545 diff changeset	417 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	418 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	419 CollectorPolicy::initialize_flags();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	420 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	421
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	422 G1YoungGenSizer::G1YoungGenSizer() : _sizer_kind(SizerDefaults), _adaptive_size(true) {
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	423 assert(G1DefaultMinNewGenPercent <= G1DefaultMaxNewGenPercent, "Min larger than max");
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	424 assert(G1DefaultMinNewGenPercent > 0 && G1DefaultMinNewGenPercent < 100, "Min out of bounds");
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	425 assert(G1DefaultMaxNewGenPercent > 0 && G1DefaultMaxNewGenPercent < 100, "Max out of bounds");
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	426
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	427 if (FLAG_IS_CMDLINE(NewRatio)) {
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	428 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	429 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	430 } else {
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	431 _sizer_kind = SizerNewRatio;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	432 _adaptive_size = false;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	433 return;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	434 }
3976 d912b598c6c3 7091032: G1: assert failure when NewRatio is used tonyp parents: 3927 diff changeset	435 }
1285 a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size tonyp parents: 1283 diff changeset	436
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	437 if (FLAG_IS_CMDLINE(NewSize)) {
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	438 _min_desired_young_length = MAX2((size_t) 1, NewSize / HeapRegion::GrainBytes);
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	439 if (FLAG_IS_CMDLINE(MaxNewSize)) {
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	440 _max_desired_young_length = MAX2((size_t) 1, MaxNewSize / HeapRegion::GrainBytes);
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	441 _sizer_kind = SizerMaxAndNewSize;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	442 _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	443 } else {
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	444 _sizer_kind = SizerNewSizeOnly;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	445 }
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	446 } else if (FLAG_IS_CMDLINE(MaxNewSize)) {
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	447 _max_desired_young_length = MAX2((size_t) 1, MaxNewSize / HeapRegion::GrainBytes);
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	448 _sizer_kind = SizerMaxNewSizeOnly;
1285 a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size tonyp parents: 1283 diff changeset	449 }
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	450 }
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	451
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	452 size_t G1YoungGenSizer::calculate_default_min_length(size_t new_number_of_heap_regions) {
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	453 size_t default_value = (new_number_of_heap_regions * G1DefaultMinNewGenPercent) / 100;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	454 return MAX2((size_t)1, default_value);
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	455 }
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	456
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	457 size_t G1YoungGenSizer::calculate_default_max_length(size_t new_number_of_heap_regions) {
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	458 size_t default_value = (new_number_of_heap_regions * G1DefaultMaxNewGenPercent) / 100;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	459 return MAX2((size_t)1, default_value);
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	460 }
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	461
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	462 void G1YoungGenSizer::heap_size_changed(size_t new_number_of_heap_regions) {
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	463 assert(new_number_of_heap_regions > 0, "Heap must be initialized");
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	464
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	465 switch (_sizer_kind) {
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	466 case SizerDefaults:
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	467 _min_desired_young_length = calculate_default_min_length(new_number_of_heap_regions);
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	468 _max_desired_young_length = calculate_default_max_length(new_number_of_heap_regions);
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	469 break;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	470 case SizerNewSizeOnly:
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	471 _max_desired_young_length = calculate_default_max_length(new_number_of_heap_regions);
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	472 _max_desired_young_length = MAX2(_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	473 break;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	474 case SizerMaxNewSizeOnly:
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	475 _min_desired_young_length = calculate_default_min_length(new_number_of_heap_regions);
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	476 _min_desired_young_length = MIN2(_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	477 break;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	478 case SizerMaxAndNewSize:
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	479 // 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	480 break;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	481 case SizerNewRatio:
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	482 _min_desired_young_length = new_number_of_heap_regions / (NewRatio + 1);
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	483 _max_desired_young_length = _min_desired_young_length;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	484 break;
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	485 default:
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	486 ShouldNotReachHere();
1285 a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size tonyp parents: 1283 diff changeset	487 }
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	488
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	489 assert(_min_desired_young_length <= _max_desired_young_length, "Invalid min/max young gen size values");
3920 af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	490 }
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	491
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	492 void G1CollectorPolicy::init() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	493 // Set aside an initial future to_space.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	494 _g1 = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	495
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	496 assert(Heap_lock->owned_by_self(), "Locking discipline.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	497
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	498 initialize_gc_policy_counters();
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	499
3920 af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	500 if (adaptive_young_list_length()) {
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	501 _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	502 } else {
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	503 _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	504 }
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	505 _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	506 update_young_list_target_length();
3920 af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	507 _prev_eden_capacity = _young_list_target_length * HeapRegion::GrainBytes;
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	508
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	509 // 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	510 // 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	511 start_incremental_cset_building();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	512 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	513
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	514 // 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	515 void G1CollectorPolicy::initialize_gc_policy_counters() {
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	516 _gc_policy_counters = new GCPolicyCounters("GarbageFirst", 1, 3);
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	517 }
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	518
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	519 bool G1CollectorPolicy::predict_will_fit(size_t young_length,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	520 double base_time_ms,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	521 size_t base_free_regions,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	522 double target_pause_time_ms) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	523 if (young_length >= base_free_regions) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	524 // end condition 1: not enough space for the young regions
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	525 return false;
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	526 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	527
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	528 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	529 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	530 (size_t) (accum_surv_rate * (double) HeapRegion::GrainBytes);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	531 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	532 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	533 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	534 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	535 // end condition 2: prediction is over the target pause time
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	536 return false;
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	537 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	538
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	539 size_t free_bytes =
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	540 (base_free_regions - young_length) * HeapRegion::GrainBytes;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	541 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	542 // end condition 3: out-of-space (conservatively!)
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	543 return false;
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	544 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	545
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	546 // success!
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	547 return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	548 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	549
3920 af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	550 void G1CollectorPolicy::record_new_heap_size(size_t new_number_of_regions) {
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	551 // re-calculate the necessary reserve
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	552 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	553 // 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	554 // smaller than 1.0) we'll get 1.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	555 _reserve_regions = (size_t) ceil(reserve_regions_d);
3920 af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	556
4729 1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx brutisso parents: 4728 diff changeset	557 _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	558 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	559
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	560 size_t G1CollectorPolicy::calculate_young_list_desired_min_length(
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	561 size_t base_min_length) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	562 size_t desired_min_length = 0;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	563 if (adaptive_young_list_length()) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	564 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	565 double now_sec = os::elapsedTime();
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	566 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	567 double alloc_rate_ms = predict_alloc_rate_ms();
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	568 desired_min_length = (size_t) ceil(alloc_rate_ms * when_ms);
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	569 } else {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	570 // 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	571 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	572 }
3920 af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	573 desired_min_length += base_min_length;
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	574 // 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	575 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	576 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	577
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	578 size_t G1CollectorPolicy::calculate_young_list_desired_max_length() {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	579 // 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	580 // 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	581 // 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	582 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	583 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	584
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	585 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	586 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	587 // 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	588 // otherwise, use the given value.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	589 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	590 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	591
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	592 // 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	593
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	594 // This is how many young regions we already have (currently: the survivors).
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	595 size_t base_min_length = recorded_survivor_regions();
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	596 // 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	597 // can allocate one eden region in the worst-case.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	598 size_t absolute_min_length = base_min_length + 1;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	599 size_t desired_min_length =
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	600 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	601 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	602 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	603 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	604
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	605 // 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	606
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	607 // We will try our best not to "eat" into the reserve.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	608 size_t absolute_max_length = 0;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	609 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	610 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	611 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	612 size_t desired_max_length = calculate_young_list_desired_max_length();
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	613 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	614 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	615 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	616
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	617 size_t young_list_target_length = 0;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	618 if (adaptive_young_list_length()) {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	619 if (gcs_are_young()) {
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	620 young_list_target_length =
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	621 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	622 base_min_length,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	623 desired_min_length,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	624 desired_max_length);
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	625 _rs_lengths_prediction = rs_lengths;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	626 } else {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	627 // 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	628 // 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	629 // 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	630 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	631 } else {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	632 if (gcs_are_young()) {
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	633 young_list_target_length = _young_list_fixed_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	634 } else {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	635 // A bit arbitrary: during mixed GCs we allocate half
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	636 // the young regions to try to add old regions to the CSet.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	637 young_list_target_length = _young_list_fixed_length / 2;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	638 // We choose to accept that we might go under the desired min
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	639 // length given that we intentionally ask for a smaller young gen.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	640 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	641 }
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 // 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	645 // 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	646 // 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	647 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	648 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	649 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	650 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	651 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	652 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	653
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	654 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	655 "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	656 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	657 _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	658
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	659 update_max_gc_locker_expansion();
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	660 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	661
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	662 size_t
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	663 G1CollectorPolicy::calculate_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	664 size_t base_min_length,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	665 size_t desired_min_length,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	666 size_t desired_max_length) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	667 assert(adaptive_young_list_length(), "pre-condition");
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	668 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	669
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	670 // 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	671 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	672 return desired_min_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	673 }
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 // 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	676 // 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	677 // 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	678 // 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	679 // survivor_regions_evac_time prediction.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	680 assert(desired_min_length > base_min_length, "invariant");
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	681 size_t min_young_length = 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	682 assert(desired_max_length > base_min_length, "invariant");
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	683 size_t max_young_length = desired_max_length - base_min_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 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	686 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	687 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	688 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	689 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	690 double base_time_ms =
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	691 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	692 survivor_regions_evac_time;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	693 size_t available_free_regions = _free_regions_at_end_of_collection;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	694 size_t base_free_regions = 0;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	695 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	696 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	697 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	698
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	699 // 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	700 // 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	701
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	702 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	703 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	704 // 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	705 // 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	706 // 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	707 // 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	708 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	709 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	710 // 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	711 // 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	712 // 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	713 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	714 } else {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	715 // 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	716 // 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	717 // length. The loop invariants are:
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	718 //
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	719 // 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	720 // 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	721 // 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	722 //
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	723 // 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	724 // 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	725 // 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	726 // 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	727 // 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	728 // 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	729
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	730 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	731 size_t 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	732 while (diff > 0) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	733 size_t young_length = min_young_length + diff;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	734 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	735 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	736 min_young_length = young_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	737 } else {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	738 max_young_length = young_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	739 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	740 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	741 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	742 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	743 // 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	744 // 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	745
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	746 // 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	747 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	748 "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	749 "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	750 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	751 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	752 "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	753 "fit into the pause target");
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	754 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	755 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	756 "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	757 "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	758 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	759 } else {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	760 // 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	761 // 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	762 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	763 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	764 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	765
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	766 double G1CollectorPolicy::predict_survivor_regions_evac_time() {
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	767 double survivor_regions_evac_time = 0.0;
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	768 for (HeapRegion * r = _recorded_survivor_head;
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	769 r != NULL && r != _recorded_survivor_tail->get_next_young_region();
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	770 r = r->get_next_young_region()) {
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	771 survivor_regions_evac_time += predict_region_elapsed_time_ms(r, true);
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	772 }
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	773 return survivor_regions_evac_time;
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	774 }
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	775
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	776 void G1CollectorPolicy::revise_young_list_target_length_if_necessary() {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	777 guarantee( adaptive_young_list_length(), "should not call this otherwise" );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	778
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	779 size_t rs_lengths = _g1->young_list()->sampled_rs_lengths();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	780 if (rs_lengths > _rs_lengths_prediction) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	781 // add 10% to avoid having to recalculate often
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	782 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	783 update_young_list_target_length(rs_lengths_prediction);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	784 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	785 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	786
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	787
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	788
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	789 HeapWord* G1CollectorPolicy::mem_allocate_work(size_t size,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	790 bool is_tlab,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	791 bool* gc_overhead_limit_was_exceeded) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	792 guarantee(false, "Not using this policy feature yet.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	793 return NULL;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	796 // This method controls how a collector handles one or more
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	797 // of its generations being fully allocated.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	798 HeapWord* G1CollectorPolicy::satisfy_failed_allocation(size_t size,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	799 bool is_tlab) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	800 guarantee(false, "Not using this policy feature yet.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	801 return NULL;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	805 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	806 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	807 HeapRegion* head = _g1->young_list()->first_region();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	808 return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	809 verify_young_ages(head, _short_lived_surv_rate_group);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	810 // also call verify_young_ages on any additional surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	811 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	812
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	813 bool
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	814 G1CollectorPolicy::verify_young_ages(HeapRegion* head,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	815 SurvRateGroup *surv_rate_group) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	816 guarantee( surv_rate_group != NULL, "pre-condition" );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	817
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	818 const char* name = surv_rate_group->name();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	819 bool ret = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	820 int prev_age = -1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	821
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	822 for (HeapRegion* curr = head;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	823 curr != NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	824 curr = curr->get_next_young_region()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	825 SurvRateGroup* group = curr->surv_rate_group();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	826 if (group == NULL && !curr->is_survivor()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	827 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	828 ret = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	829 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	830
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	831 if (surv_rate_group == group) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	832 int age = curr->age_in_surv_rate_group();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	833
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	834 if (age < 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	835 gclog_or_tty->print_cr("## %s: encountered negative age", name);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	836 ret = false;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	839 if (age <= prev_age) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	840 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	841 "(%d, %d)", name, age, prev_age);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	842 ret = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	843 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	844 prev_age = age;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	845 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	846 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	847
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	848 return ret;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	849 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	850 #endif // PRODUCT
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 void G1CollectorPolicy::record_full_collection_start() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	853 _cur_collection_start_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	854 // 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	855 _g1->set_full_collection();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	856 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	857
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	858 void G1CollectorPolicy::record_full_collection_end() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	859 // Consider this like a collection pause for the purposes of allocation
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	860 // since last pause.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	861 double end_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	862 double full_gc_time_sec = end_sec - _cur_collection_start_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	863 double full_gc_time_ms = full_gc_time_sec * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	864
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	865 _all_full_gc_times_ms->add(full_gc_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	866
595 3698e8f47799 6804746: G1: guarantee(variance() > -1.0,"variance should be >= 0") (due to evacuation failure) tonyp parents: 547 diff changeset	867 update_recent_gc_times(end_sec, full_gc_time_ms);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	868
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	869 _g1->clear_full_collection();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	870
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	871 // "Nuke" the heuristics that control the young/mixed GC
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	872 // 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	873 set_gcs_are_young(true);
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	874 _last_young_gc = false;
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	875 _should_revert_to_young_gcs = false;
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	876 clear_initiate_conc_mark_if_possible();
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 _known_garbage_bytes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	879 _known_garbage_ratio = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	880 _in_marking_window = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	881 _in_marking_window_im = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	882
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	883 _short_lived_surv_rate_group->start_adding_regions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	884 // also call this on any additional surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	885
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	886 record_survivor_regions(0, NULL, NULL);
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	887
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	888 _free_regions_at_end_of_collection = _g1->free_regions();
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	889 // Reset survivors SurvRateGroup.
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	890 _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	891 update_young_list_target_length();
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	892 _collectionSetChooser->updateAfterFullCollection();
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	893 }
342 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 void G1CollectorPolicy::record_stop_world_start() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	896 _stop_world_start = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	897 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	898
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	899 void G1CollectorPolicy::record_collection_pause_start(double start_time_sec,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	900 size_t start_used) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	901 if (PrintGCDetails) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	902 gclog_or_tty->stamp(PrintGCTimeStamps);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	903 gclog_or_tty->print("[GC pause");
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	904 gclog_or_tty->print(" (%s)", gcs_are_young() ? "young" : "mixed");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	905 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	906
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	907 // 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	908 // 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	909 // 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	910 update_survivors_policy();
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	911
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	912 assert(_g1->used() == _g1->recalculate_used(),
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	913 err_msg("sanity, used: "SIZE_FORMAT" recalculate_used: "SIZE_FORMAT,
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	914 _g1->used(), _g1->recalculate_used()));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	915
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	916 double s_w_t_ms = (start_time_sec - _stop_world_start) * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	917 _all_stop_world_times_ms->add(s_w_t_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	918 _stop_world_start = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	919
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	920 _cur_collection_start_sec = start_time_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	921 _cur_collection_pause_used_at_start_bytes = start_used;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	922 _cur_collection_pause_used_regions_at_start = _g1->used_regions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	923 _pending_cards = _g1->pending_card_num();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	924 _max_pending_cards = _g1->max_pending_card_num();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	925
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	926 _bytes_in_collection_set_before_gc = 0;
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	927 _bytes_copied_during_gc = 0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	928
3764 053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	929 YoungList* young_list = _g1->young_list();
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	930 _eden_bytes_before_gc = young_list->eden_used_bytes();
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	931 _survivor_bytes_before_gc = young_list->survivor_used_bytes();
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	932 _capacity_before_gc = _g1->capacity();
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	933
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	934 #ifdef DEBUG
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	935 // initialise these to something well known so that we can spot
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	936 // if they are not set properly
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	937
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	938 for (int i = 0; i < _parallel_gc_threads; ++i) {
1611 215576b54709 6946048: G1: improvements to +PrintGCDetails output tonyp parents: 1610 diff changeset	939 _par_last_gc_worker_start_times_ms[i] = -1234.0;
215576b54709 6946048: G1: improvements to +PrintGCDetails output tonyp parents: 1610 diff changeset	940 _par_last_ext_root_scan_times_ms[i] = -1234.0;
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4729 diff changeset	941 _par_last_satb_filtering_times_ms[i] = -1234.0;
1611 215576b54709 6946048: G1: improvements to +PrintGCDetails output tonyp parents: 1610 diff changeset	942 _par_last_update_rs_times_ms[i] = -1234.0;
215576b54709 6946048: G1: improvements to +PrintGCDetails output tonyp parents: 1610 diff changeset	943 _par_last_update_rs_processed_buffers[i] = -1234.0;
215576b54709 6946048: G1: improvements to +PrintGCDetails output tonyp parents: 1610 diff changeset	944 _par_last_scan_rs_times_ms[i] = -1234.0;
215576b54709 6946048: G1: improvements to +PrintGCDetails output tonyp parents: 1610 diff changeset	945 _par_last_obj_copy_times_ms[i] = -1234.0;
215576b54709 6946048: G1: improvements to +PrintGCDetails output tonyp parents: 1610 diff changeset	946 _par_last_termination_times_ms[i] = -1234.0;
215576b54709 6946048: G1: improvements to +PrintGCDetails output tonyp parents: 1610 diff changeset	947 _par_last_termination_attempts[i] = -1234.0;
215576b54709 6946048: G1: improvements to +PrintGCDetails output tonyp parents: 1610 diff changeset	948 _par_last_gc_worker_end_times_ms[i] = -1234.0;
2430 5c0b591e1074 6948149: G1: Imbalance in termination times brutisso parents: 2363 diff changeset	949 _par_last_gc_worker_times_ms[i] = -1234.0;
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	950 _par_last_gc_worker_other_times_ms[i] = -1234.0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	951 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	952 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	953
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	954 for (int i = 0; i < _aux_num; ++i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	955 _cur_aux_times_ms[i] = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	956 _cur_aux_times_set[i] = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	957 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	958
4096 00dd86e542eb 7114303: G1: assert(_g1->mark_in_progress()) failed: shouldn't be here otherwise johnc parents: 4095 diff changeset	959 // This is initialized to zero here and is set during
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	960 // the evacuation pause if marking is in progress.
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	961 _cur_satb_drain_time_ms = 0.0;
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	962 // This is initialized to zero here and is set during the evacuation
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	963 // pause if we actually waited for the root region scanning to finish.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	964 _root_region_scan_wait_time_ms = 0.0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	965
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	966 _last_gc_was_young = false;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	967
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	968 // do that for any other surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	969 _short_lived_surv_rate_group->stop_adding_regions();
1282 b81f3572f355 6928059: G1: command line parameter renaming tonyp parents: 1261 diff changeset	970 _survivors_age_table.clear();
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	971
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	972 assert( verify_young_ages(), "region age verification" );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	973 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	974
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	975 void G1CollectorPolicy::record_concurrent_mark_init_end(double
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	976 mark_init_elapsed_time_ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	977 _during_marking = true;
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	978 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	979 clear_during_initial_mark_pause();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	980 _cur_mark_stop_world_time_ms = mark_init_elapsed_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	981 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	982
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	983 void G1CollectorPolicy::record_concurrent_mark_remark_start() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	984 _mark_remark_start_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	985 _during_marking = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	986 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	987
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	988 void G1CollectorPolicy::record_concurrent_mark_remark_end() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	989 double end_time_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	990 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	991 _concurrent_mark_remark_times_ms->add(elapsed_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	992 _cur_mark_stop_world_time_ms += elapsed_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	993 _prev_collection_pause_end_ms += elapsed_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	994
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	995 _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	996 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	997
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	998 void G1CollectorPolicy::record_concurrent_mark_cleanup_start() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	999 _mark_cleanup_start_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1000 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1001
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	1002 void G1CollectorPolicy::record_concurrent_mark_cleanup_completed() {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1003 _should_revert_to_young_gcs = false;
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1004 _last_young_gc = true;
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1005 _in_marking_window = false;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1006 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1007
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1008 void G1CollectorPolicy::record_concurrent_pause() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1009 if (_stop_world_start > 0.0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1010 double yield_ms = (os::elapsedTime() - _stop_world_start) * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1011 _all_yield_times_ms->add(yield_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1012 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1013 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1014
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1015 void G1CollectorPolicy::record_concurrent_pause_end() {
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1018 template<class T>
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1019 T sum_of(T* sum_arr, int start, int n, int N) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1020 T sum = (T)0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1021 for (int i = 0; i < n; i++) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1022 int j = (start + i) % N;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1023 sum += sum_arr[j];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1024 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1025 return sum;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1026 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1027
1611 215576b54709 6946048: G1: improvements to +PrintGCDetails output tonyp parents: 1610 diff changeset	1028 void G1CollectorPolicy::print_par_stats(int level,
215576b54709 6946048: G1: improvements to +PrintGCDetails output tonyp parents: 1610 diff changeset	1029 const char* str,
2430 5c0b591e1074 6948149: G1: Imbalance in termination times brutisso parents: 2363 diff changeset	1030 double* data) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1031 double min = data[0], max = data[0];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1032 double total = 0.0;
2363 c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	1033 LineBuffer buf(level);
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	1034 buf.append("[%s (ms):", str);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1035 for (uint i = 0; i < no_of_gc_threads(); ++i) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1036 double val = data[i];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1037 if (val < min)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1038 min = val;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1039 if (val > max)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1040 max = val;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1041 total += val;
2363 c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	1042 buf.append(" %3.1lf", val);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1043 }
2430 5c0b591e1074 6948149: G1: Imbalance in termination times brutisso parents: 2363 diff changeset	1044 buf.append_and_print_cr("");
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1045 double avg = total / (double) no_of_gc_threads();
2430 5c0b591e1074 6948149: G1: Imbalance in termination times brutisso parents: 2363 diff changeset	1046 buf.append_and_print_cr(" Avg: %5.1lf, Min: %5.1lf, Max: %5.1lf, Diff: %5.1lf]",
5c0b591e1074 6948149: G1: Imbalance in termination times brutisso parents: 2363 diff changeset	1047 avg, min, max, max - min);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1048 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1049
1611 215576b54709 6946048: G1: improvements to +PrintGCDetails output tonyp parents: 1610 diff changeset	1050 void G1CollectorPolicy::print_par_sizes(int level,
215576b54709 6946048: G1: improvements to +PrintGCDetails output tonyp parents: 1610 diff changeset	1051 const char* str,
2430 5c0b591e1074 6948149: G1: Imbalance in termination times brutisso parents: 2363 diff changeset	1052 double* data) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1053 double min = data[0], max = data[0];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1054 double total = 0.0;
2363 c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	1055 LineBuffer buf(level);
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	1056 buf.append("[%s :", str);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1057 for (uint i = 0; i < no_of_gc_threads(); ++i) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1058 double val = data[i];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1059 if (val < min)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1060 min = val;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1061 if (val > max)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1062 max = val;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1063 total += val;
2363 c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	1064 buf.append(" %d", (int) val);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1065 }
2430 5c0b591e1074 6948149: G1: Imbalance in termination times brutisso parents: 2363 diff changeset	1066 buf.append_and_print_cr("");
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1067 double avg = total / (double) no_of_gc_threads();
2430 5c0b591e1074 6948149: G1: Imbalance in termination times brutisso parents: 2363 diff changeset	1068 buf.append_and_print_cr(" Sum: %d, Avg: %d, Min: %d, Max: %d, Diff: %d]",
5c0b591e1074 6948149: G1: Imbalance in termination times brutisso parents: 2363 diff changeset	1069 (int)total, (int)avg, (int)min, (int)max, (int)max - (int)min);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1070 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1071
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1072 void G1CollectorPolicy::print_stats(int level,
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1073 const char* str,
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1074 double value) {
2363 c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	1075 LineBuffer(level).append_and_print_cr("[%s: %5.1lf ms]", str, value);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1076 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1077
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1078 void G1CollectorPolicy::print_stats(int level,
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1079 const char* str,
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1080 int value) {
2363 c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	1081 LineBuffer(level).append_and_print_cr("[%s: %d]", str, value);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1082 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1083
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1084 double G1CollectorPolicy::avg_value(double* data) {
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1779 diff changeset	1085 if (G1CollectedHeap::use_parallel_gc_threads()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1086 double ret = 0.0;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1087 for (uint i = 0; i < no_of_gc_threads(); ++i) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1088 ret += data[i];
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1089 }
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1090 return ret / (double) no_of_gc_threads();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1091 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1092 return data[0];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1093 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1094 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1095
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1096 double G1CollectorPolicy::max_value(double* data) {
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1779 diff changeset	1097 if (G1CollectedHeap::use_parallel_gc_threads()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1098 double ret = data[0];
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1099 for (uint i = 1; i < no_of_gc_threads(); ++i) {
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1100 if (data[i] > ret) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1101 ret = data[i];
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1102 }
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1103 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1104 return ret;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1105 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1106 return data[0];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1107 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1108 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1109
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1110 double G1CollectorPolicy::sum_of_values(double* data) {
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1779 diff changeset	1111 if (G1CollectedHeap::use_parallel_gc_threads()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1112 double sum = 0.0;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1113 for (uint i = 0; i < no_of_gc_threads(); i++) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1114 sum += data[i];
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1115 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1116 return sum;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1117 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1118 return data[0];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1119 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1120 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1121
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1122 double G1CollectorPolicy::max_sum(double* data1, double* data2) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1123 double ret = data1[0] + data2[0];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1124
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1779 diff changeset	1125 if (G1CollectedHeap::use_parallel_gc_threads()) {
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1126 for (uint i = 1; i < no_of_gc_threads(); ++i) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1127 double data = data1[i] + data2[i];
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1128 if (data > ret) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1129 ret = data;
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1130 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1131 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1132 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1133 return ret;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1134 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1135
4834 6a78aa6ac1ff 7132311: G1: assert((s == klass->oop_size(this)) \|\| (Universe::heap()->is_gc_active() && ((is_typeArray()... brutisso parents: 4829 diff changeset	1136 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	1137 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	1138 return false;
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1139 }
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1140
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1141 size_t marking_initiating_used_threshold =
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1142 (_g1->capacity() / 100) * InitiatingHeapOccupancyPercent;
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1143 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	1144 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	1145
6a78aa6ac1ff 7132311: G1: assert((s == klass->oop_size(this)) \|\| (Universe::heap()->is_gc_active() && ((is_typeArray()... brutisso parents: 4829 diff changeset	1146 if ((cur_used_bytes + alloc_byte_size) > marking_initiating_used_threshold) {
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1147 if (gcs_are_young()) {
4834 6a78aa6ac1ff 7132311: G1: assert((s == klass->oop_size(this)) \|\| (Universe::heap()->is_gc_active() && ((is_typeArray()... brutisso parents: 4829 diff changeset	1148 ergo_verbose5(ErgoConcCycles,
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1149 "request concurrent cycle initiation",
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1150 ergo_format_reason("occupancy higher than threshold")
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1151 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	1152 ergo_format_byte("allocation request")
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1153 ergo_format_byte_perc("threshold")
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1154 ergo_format_str("source"),
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1155 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	1156 alloc_byte_size,
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1157 marking_initiating_used_threshold,
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1158 (double) InitiatingHeapOccupancyPercent,
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1159 source);
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1160 return true;
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1161 } else {
4834 6a78aa6ac1ff 7132311: G1: assert((s == klass->oop_size(this)) \|\| (Universe::heap()->is_gc_active() && ((is_typeArray()... brutisso parents: 4829 diff changeset	1162 ergo_verbose5(ErgoConcCycles,
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1163 "do not request concurrent cycle initiation",
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1164 ergo_format_reason("still doing mixed collections")
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1165 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	1166 ergo_format_byte("allocation request")
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1167 ergo_format_byte_perc("threshold")
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1168 ergo_format_str("source"),
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1169 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	1170 alloc_byte_size,
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1171 marking_initiating_used_threshold,
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1172 (double) InitiatingHeapOccupancyPercent,
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1173 source);
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1174 }
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1175 }
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1176
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1177 return false;
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1178 }
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1179
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1180 // Anything below that is considered to be zero
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1181 #define MIN_TIMER_GRANULARITY 0.0000001
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1182
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1183 void G1CollectorPolicy::record_collection_pause_end(int no_of_gc_threads) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1184 double end_time_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1185 double elapsed_ms = _last_pause_time_ms;
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1779 diff changeset	1186 bool parallel = G1CollectedHeap::use_parallel_gc_threads();
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1187 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	1188 "otherwise, the subtraction below does not make sense");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1189 size_t rs_size =
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1190 _cur_collection_pause_used_regions_at_start - cset_region_length();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1191 size_t cur_used_bytes = _g1->used();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1192 assert(cur_used_bytes == _g1->recalculate_used(), "It should!");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1193 bool last_pause_included_initial_mark = false;
1707 0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses tonyp parents: 1705 diff changeset	1194 bool update_stats = !_g1->evacuation_failed();
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1195 set_no_of_gc_threads(no_of_gc_threads);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1196
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1197 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1198 if (G1YoungSurvRateVerbose) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1199 gclog_or_tty->print_cr("");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1200 _short_lived_surv_rate_group->print();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1201 // do that for any other surv rate groups too
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1202 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1203 #endif // PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1204
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1205 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	1206 if (last_pause_included_initial_mark) {
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1207 record_concurrent_mark_init_end(0.0);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1208 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1209
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1210 if (!_last_young_gc && need_to_start_conc_mark("end of GC")) {
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1211 // 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	1212 // 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	1213 // 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	1214 set_initiate_conc_mark_if_possible();
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1215 }
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1216
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1217 _mmu_tracker->add_pause(end_time_sec - elapsed_ms/1000.0,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1218 end_time_sec, false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1219
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1220 // This assert is exempted when we're doing parallel collection pauses,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1221 // because the fragmentation caused by the parallel GC allocation buffers
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1222 // can lead to more memory being used during collection than was used
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1223 // before. Best leave this out until the fragmentation problem is fixed.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1224 // Pauses in which evacuation failed can also lead to negative
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1225 // collections, since no space is reclaimed from a region containing an
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1226 // object whose evacuation failed.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1227 // Further, we're now always doing parallel collection. But I'm still
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1228 // leaving this here as a placeholder for a more precise assertion later.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1229 // (DLD, 10/05.)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1230 assert((true \|\| parallel) // Always using GC LABs now.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1231 \|\| _g1->evacuation_failed()
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1232 \|\| _cur_collection_pause_used_at_start_bytes >= cur_used_bytes,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1233 "Negative collection");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1234
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1235 size_t freed_bytes =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1236 _cur_collection_pause_used_at_start_bytes - cur_used_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1237 size_t surviving_bytes = _collection_set_bytes_used_before - freed_bytes;
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1238
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1239 double survival_fraction =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1240 (double)surviving_bytes/
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1241 (double)_collection_set_bytes_used_before;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1242
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1243 // These values are used to update the summary information that is
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1244 // displayed when TraceGen0Time is enabled, and are output as part
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1245 // of the PrintGCDetails output, in the non-parallel case.
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1246
3823 14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	1247 double ext_root_scan_time = avg_value(_par_last_ext_root_scan_times_ms);
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4729 diff changeset	1248 double satb_filtering_time = avg_value(_par_last_satb_filtering_times_ms);
3823 14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	1249 double update_rs_time = avg_value(_par_last_update_rs_times_ms);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	1250 double update_rs_processed_buffers =
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	1251 sum_of_values(_par_last_update_rs_processed_buffers);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	1252 double scan_rs_time = avg_value(_par_last_scan_rs_times_ms);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	1253 double obj_copy_time = avg_value(_par_last_obj_copy_times_ms);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	1254 double termination_time = avg_value(_par_last_termination_times_ms);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	1255
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1256 double known_time = ext_root_scan_time +
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4729 diff changeset	1257 satb_filtering_time +
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1258 update_rs_time +
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1259 scan_rs_time +
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1260 obj_copy_time;
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1261
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1262 double other_time_ms = elapsed_ms;
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1263
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1264 // Subtract the SATB drain time. It's initialized to zero at the
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1265 // start of the pause and is updated during the pause if marking
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1266 // is in progress.
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1267 other_time_ms -= _cur_satb_drain_time_ms;
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1268
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	1269 // Subtract the root region scanning wait time. It's initialized to
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	1270 // zero at the start of the pause.
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	1271 other_time_ms -= _root_region_scan_wait_time_ms;
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	1272
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1273 if (parallel) {
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1274 other_time_ms -= _cur_collection_par_time_ms;
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1275 } else {
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1276 other_time_ms -= known_time;
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1277 }
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1278
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1279 // Subtract the time taken to clean the card table from the
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1280 // current value of "other time"
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1281 other_time_ms -= _cur_clear_ct_time_ms;
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1282
4097 dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4096 diff changeset	1283 // Subtract the time spent completing marking in the collection
dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4096 diff changeset	1284 // set. Note if marking is not in progress during the pause
dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4096 diff changeset	1285 // the value of _mark_closure_time_ms will be zero.
dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4096 diff changeset	1286 other_time_ms -= _mark_closure_time_ms;
dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4096 diff changeset	1287
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1288 // TraceGen0Time and TraceGen1Time summary info updating.
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1289 _all_pause_times_ms->add(elapsed_ms);
3823 14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	1290
595 3698e8f47799 6804746: G1: guarantee(variance() > -1.0,"variance should be >= 0") (due to evacuation failure) tonyp parents: 547 diff changeset	1291 if (update_stats) {
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1292 _summary->record_total_time_ms(elapsed_ms);
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1293 _summary->record_other_time_ms(other_time_ms);
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1294
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1295 MainBodySummary* body_summary = _summary->main_body_summary();
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1296 assert(body_summary != NULL, "should not be null!");
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1297
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1298 // This will be non-zero iff marking is currently in progress (i.e.
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1299 // _g1->mark_in_progress() == true) and the currrent pause was not
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1300 // an initial mark pause. Since the body_summary items are NumberSeqs,
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1301 // however, they have to be consistent and updated in lock-step with
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1302 // each other. Therefore we unconditionally record the SATB drain
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1303 // time - even if it's zero.
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1304 body_summary->record_satb_drain_time_ms(_cur_satb_drain_time_ms);
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	1305 body_summary->record_root_region_scan_wait_time_ms(
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	1306 _root_region_scan_wait_time_ms);
3823 14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	1307
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	1308 body_summary->record_ext_root_scan_time_ms(ext_root_scan_time);
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4729 diff changeset	1309 body_summary->record_satb_filtering_time_ms(satb_filtering_time);
3823 14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	1310 body_summary->record_update_rs_time_ms(update_rs_time);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	1311 body_summary->record_scan_rs_time_ms(scan_rs_time);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	1312 body_summary->record_obj_copy_time_ms(obj_copy_time);
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1313
3823 14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	1314 if (parallel) {
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	1315 body_summary->record_parallel_time_ms(_cur_collection_par_time_ms);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	1316 body_summary->record_termination_time_ms(termination_time);
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1317
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1318 double parallel_known_time = known_time + termination_time;
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1319 double parallel_other_time = _cur_collection_par_time_ms - parallel_known_time;
3823 14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	1320 body_summary->record_parallel_other_time_ms(parallel_other_time);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	1321 }
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1322
3823 14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	1323 body_summary->record_mark_closure_time_ms(_mark_closure_time_ms);
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1324 body_summary->record_clear_ct_time_ms(_cur_clear_ct_time_ms);
3823 14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	1325
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1326 // We exempt parallel collection from this check because Alloc Buffer
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1327 // fragmentation can produce negative collections. Same with evac
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1328 // failure.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1329 // Further, we're now always doing parallel collection. But I'm still
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1330 // leaving this here as a placeholder for a more precise assertion later.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1331 // (DLD, 10/05.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1332 assert((true \|\| parallel)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1333 \|\| _g1->evacuation_failed()
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1334 \|\| surviving_bytes <= _collection_set_bytes_used_before,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1335 "Or else negative collection!");
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1336
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1337 // this is where we update the allocation rate of the application
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1338 double app_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1339 (_cur_collection_start_sec * 1000.0 - _prev_collection_pause_end_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1340 if (app_time_ms < MIN_TIMER_GRANULARITY) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1341 // This usually happens due to the timer not having the required
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1342 // granularity. Some Linuxes are the usual culprits.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1343 // We'll just set it to something (arbitrarily) small.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1344 app_time_ms = 1.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1345 }
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1346 // 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	1347 // 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	1348 // 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	1349 // 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	1350 // 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	1351 // 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	1352 // 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	1353 // place we can safely ignore them here.
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1354 size_t regions_allocated = eden_cset_region_length();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1355 double alloc_rate_ms = (double) regions_allocated / app_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1356 _alloc_rate_ms_seq->add(alloc_rate_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1357
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1358 double interval_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1359 (end_time_sec - _recent_prev_end_times_for_all_gcs_sec->oldest()) * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1360 update_recent_gc_times(end_time_sec, elapsed_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1361 _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	1362 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	1363 (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	1364 #ifndef PRODUCT
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1365 // 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	1366 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	1367 gclog_or_tty->print_cr("-------------------------------------------");
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1368 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	1369 _recent_gc_times_ms->dump();
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1370 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	1371 _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	1372 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	1373 _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	1374 // 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	1375 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	1376 #endif // !PRODUCT
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag ysr parents: 1086 diff changeset	1377 // 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	1378 // 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	1379 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	1380 _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	1381 } else {
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1382 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	1383 _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	1384 }
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio() ysr parents: 1043 diff changeset	1385 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1386 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1387
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1388 for (int i = 0; i < _aux_num; ++i) {
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1389 if (_cur_aux_times_set[i]) {
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1390 _all_aux_times_ms[i].add(_cur_aux_times_ms[i]);
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1391 }
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1392 }
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1393
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1394 // PrintGCDetails output
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1395 if (PrintGCDetails) {
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1396 bool print_marking_info =
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1397 _g1->mark_in_progress() && !last_pause_included_initial_mark;
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1398
1707 0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses tonyp parents: 1705 diff changeset	1399 gclog_or_tty->print_cr("%s, %1.8lf secs]",
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1400 (last_pause_included_initial_mark) ? " (initial-mark)" : "",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1401 elapsed_ms / 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1402
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	1403 if (_root_region_scan_wait_time_ms > 0.0) {
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	1404 print_stats(1, "Root Region Scan Waiting", _root_region_scan_wait_time_ms);
eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	1405 }
1707 0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses tonyp parents: 1705 diff changeset	1406 if (parallel) {
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses tonyp parents: 1705 diff changeset	1407 print_stats(1, "Parallel Time", _cur_collection_par_time_ms);
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1408 print_par_stats(2, "GC Worker Start", _par_last_gc_worker_start_times_ms);
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1409 print_par_stats(2, "Ext Root Scanning", _par_last_ext_root_scan_times_ms);
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1410 if (print_marking_info) {
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4729 diff changeset	1411 print_par_stats(2, "SATB Filtering", _par_last_satb_filtering_times_ms);
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1412 }
1707 0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses tonyp parents: 1705 diff changeset	1413 print_par_stats(2, "Update RS", _par_last_update_rs_times_ms);
2430 5c0b591e1074 6948149: G1: Imbalance in termination times brutisso parents: 2363 diff changeset	1414 print_par_sizes(3, "Processed Buffers", _par_last_update_rs_processed_buffers);
1707 0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses tonyp parents: 1705 diff changeset	1415 print_par_stats(2, "Scan RS", _par_last_scan_rs_times_ms);
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses tonyp parents: 1705 diff changeset	1416 print_par_stats(2, "Object Copy", _par_last_obj_copy_times_ms);
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses tonyp parents: 1705 diff changeset	1417 print_par_stats(2, "Termination", _par_last_termination_times_ms);
2430 5c0b591e1074 6948149: G1: Imbalance in termination times brutisso parents: 2363 diff changeset	1418 print_par_sizes(3, "Termination Attempts", _par_last_termination_attempts);
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1419 print_par_stats(2, "GC Worker End", _par_last_gc_worker_end_times_ms);
2430 5c0b591e1074 6948149: G1: Imbalance in termination times brutisso parents: 2363 diff changeset	1420
5c0b591e1074 6948149: G1: Imbalance in termination times brutisso parents: 2363 diff changeset	1421 for (int i = 0; i < _parallel_gc_threads; i++) {
5c0b591e1074 6948149: G1: Imbalance in termination times brutisso parents: 2363 diff changeset	1422 _par_last_gc_worker_times_ms[i] = _par_last_gc_worker_end_times_ms[i] - _par_last_gc_worker_start_times_ms[i];
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1423
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1424 double worker_known_time = _par_last_ext_root_scan_times_ms[i] +
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4729 diff changeset	1425 _par_last_satb_filtering_times_ms[i] +
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1426 _par_last_update_rs_times_ms[i] +
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1427 _par_last_scan_rs_times_ms[i] +
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1428 _par_last_obj_copy_times_ms[i] +
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1429 _par_last_termination_times_ms[i];
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1430
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1431 _par_last_gc_worker_other_times_ms[i] = _cur_collection_par_time_ms - worker_known_time;
2430 5c0b591e1074 6948149: G1: Imbalance in termination times brutisso parents: 2363 diff changeset	1432 }
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1433 print_par_stats(2, "GC Worker", _par_last_gc_worker_times_ms);
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1434 print_par_stats(2, "GC Worker Other", _par_last_gc_worker_other_times_ms);
1707 0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses tonyp parents: 1705 diff changeset	1435 } else {
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1436 print_stats(1, "Ext Root Scanning", ext_root_scan_time);
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1437 if (print_marking_info) {
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4729 diff changeset	1438 print_stats(1, "SATB Filtering", satb_filtering_time);
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1439 }
1707 0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses tonyp parents: 1705 diff changeset	1440 print_stats(1, "Update RS", update_rs_time);
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1441 print_stats(2, "Processed Buffers", (int)update_rs_processed_buffers);
1707 0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses tonyp parents: 1705 diff changeset	1442 print_stats(1, "Scan RS", scan_rs_time);
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses tonyp parents: 1705 diff changeset	1443 print_stats(1, "Object Copying", obj_copy_time);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1444 }
4097 dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4096 diff changeset	1445 if (print_marking_info) {
dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4096 diff changeset	1446 print_stats(1, "Complete CSet Marking", _mark_closure_time_ms);
dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4096 diff changeset	1447 }
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1448 print_stats(1, "Clear CT", _cur_clear_ct_time_ms);
890 6cb8e9df7174 6819077: G1: first GC thread coming late into the GC. johnc parents: 845 diff changeset	1449 #ifndef PRODUCT
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC. johnc parents: 845 diff changeset	1450 print_stats(1, "Cur Clear CC", _cur_clear_cc_time_ms);
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC. johnc parents: 845 diff changeset	1451 print_stats(1, "Cum Clear CC", _cum_clear_cc_time_ms);
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC. johnc parents: 845 diff changeset	1452 print_stats(1, "Min Clear CC", _min_clear_cc_time_ms);
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC. johnc parents: 845 diff changeset	1453 print_stats(1, "Max Clear CC", _max_clear_cc_time_ms);
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC. johnc parents: 845 diff changeset	1454 if (_num_cc_clears > 0) {
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC. johnc parents: 845 diff changeset	1455 print_stats(1, "Avg Clear CC", _cum_clear_cc_time_ms / ((double)_num_cc_clears));
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC. johnc parents: 845 diff changeset	1456 }
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC. johnc parents: 845 diff changeset	1457 #endif
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1458 print_stats(1, "Other", other_time_ms);
4097 dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4096 diff changeset	1459 print_stats(2, "Choose CSet",
dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4096 diff changeset	1460 (_recorded_young_cset_choice_time_ms +
dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4096 diff changeset	1461 _recorded_non_young_cset_choice_time_ms));
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3976 diff changeset	1462 print_stats(2, "Ref Proc", _cur_ref_proc_time_ms);
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3976 diff changeset	1463 print_stats(2, "Ref Enq", _cur_ref_enq_time_ms);
4097 dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4096 diff changeset	1464 print_stats(2, "Free CSet",
dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4096 diff changeset	1465 (_recorded_young_free_cset_time_ms +
dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4096 diff changeset	1466 _recorded_non_young_free_cset_time_ms));
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1467
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1468 for (int i = 0; i < _aux_num; ++i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1469 if (_cur_aux_times_set[i]) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1470 char buffer[96];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1471 sprintf(buffer, "Aux%d", i);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1472 print_stats(1, buffer, _cur_aux_times_ms[i]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1473 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1474 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1475 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1476
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1477 // Update the efficiency-since-mark vars.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1478 double proc_ms = elapsed_ms * (double) _parallel_gc_threads;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1479 if (elapsed_ms < MIN_TIMER_GRANULARITY) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1480 // This usually happens due to the timer not having the required
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1481 // granularity. Some Linuxes are the usual culprits.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1482 // We'll just set it to something (arbitrarily) small.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1483 proc_ms = 1.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1484 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1485 double cur_efficiency = (double) freed_bytes / proc_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1486
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1487 bool new_in_marking_window = _in_marking_window;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1488 bool new_in_marking_window_im = false;
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	1489 if (during_initial_mark_pause()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1490 new_in_marking_window = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1491 new_in_marking_window_im = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1492 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1493
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1494 if (_last_young_gc) {
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	1495 if (!last_pause_included_initial_mark) {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1496 ergo_verbose2(ErgoMixedGCs,
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1497 "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	1498 ergo_format_byte_perc("known garbage"),
273b46400613 7086533: G1: assert(!_g1->is_obj_dead(obj)): We should not be preserving dead objs: g1CollectedHeap.cpp:3835 johnc parents: 3979 diff changeset	1499 _known_garbage_bytes, _known_garbage_ratio * 100.0);
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1500 set_gcs_are_young(false);
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	1501 } else {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1502 ergo_verbose0(ErgoMixedGCs,
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1503 "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	1504 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	1505 }
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1506 _last_young_gc = false;
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1507 }
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1508
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1509 if (!_last_gc_was_young) {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1510 if (_should_revert_to_young_gcs) {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1511 ergo_verbose2(ErgoMixedGCs,
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1512 "end mixed GCs",
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1513 ergo_format_reason("mixed GCs end requested")
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1514 ergo_format_byte_perc("known garbage"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1515 _known_garbage_bytes, _known_garbage_ratio * 100.0);
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1516 set_gcs_are_young(true);
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1517 } else if (_known_garbage_ratio < 0.05) {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1518 ergo_verbose3(ErgoMixedGCs,
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1519 "end mixed GCs",
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1520 ergo_format_reason("known garbage percent lower than threshold")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1521 ergo_format_byte_perc("known garbage")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1522 ergo_format_perc("threshold"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1523 _known_garbage_bytes, _known_garbage_ratio * 100.0,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1524 0.05 * 100.0);
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1525 set_gcs_are_young(true);
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1526 } else if (adaptive_young_list_length() &&
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1527 (get_gc_eff_factor() * cur_efficiency < predict_young_gc_eff())) {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1528 ergo_verbose5(ErgoMixedGCs,
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1529 "end mixed GCs",
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1530 ergo_format_reason("current GC efficiency lower than "
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1531 "predicted young GC efficiency")
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1532 ergo_format_double("GC efficiency factor")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1533 ergo_format_double("current GC efficiency")
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1534 ergo_format_double("predicted young GC efficiency")
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1535 ergo_format_byte_perc("known garbage"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1536 get_gc_eff_factor(), cur_efficiency,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1537 predict_young_gc_eff(),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1538 _known_garbage_bytes, _known_garbage_ratio * 100.0);
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1539 set_gcs_are_young(true);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1540 }
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1541 }
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1542 _should_revert_to_young_gcs = false;
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1543
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1544 if (_last_gc_was_young && !_during_marking) {
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1545 _young_gc_eff_seq->add(cur_efficiency);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1546 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1547
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1548 _short_lived_surv_rate_group->start_adding_regions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1549 // do that for any other surv rate groupsx
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1550
677 96b229c54d1e 6543938: G1: remove the concept of popularity apetrusenko parents: 648 diff changeset	1551 if (update_stats) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1552 double pause_time_ms = elapsed_ms;
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 size_t diff = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1555 if (_max_pending_cards >= _pending_cards)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1556 diff = _max_pending_cards - _pending_cards;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1557 _pending_card_diff_seq->add((double) diff);
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 double cost_per_card_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1560 if (_pending_cards > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1561 cost_per_card_ms = update_rs_time / (double) _pending_cards;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1562 _cost_per_card_ms_seq->add(cost_per_card_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1563 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1564
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1565 size_t cards_scanned = _g1->cards_scanned();
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 double cost_per_entry_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1568 if (cards_scanned > 10) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1569 cost_per_entry_ms = scan_rs_time / (double) cards_scanned;
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1570 if (_last_gc_was_young) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1571 _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	1572 } else {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1573 _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	1574 }
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1577 if (_max_rs_lengths > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1578 double cards_per_entry_ratio =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1579 (double) cards_scanned / (double) _max_rs_lengths;
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1580 if (_last_gc_was_young) {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1581 _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	1582 } else {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1583 _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	1584 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1585 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1586
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	1587 // 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	1588 // 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	1589 // 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	1590 // 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	1591 // _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	1592 // 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	1593 // 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	1594 // _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	1595 // 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	1596 // 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	1597 // 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	1598 // 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	1599 // conditional below just in case.
4130 d23d2b18183e 7118202: G1: eden size unnecessarily drops to a minimum tonyp parents: 4097 diff changeset	1600 size_t rs_length_diff = 0;
d23d2b18183e 7118202: G1: eden size unnecessarily drops to a minimum tonyp parents: 4097 diff changeset	1601 if (_max_rs_lengths > _recorded_rs_lengths) {
d23d2b18183e 7118202: G1: eden size unnecessarily drops to a minimum tonyp parents: 4097 diff changeset	1602 rs_length_diff = _max_rs_lengths - _recorded_rs_lengths;
d23d2b18183e 7118202: G1: eden size unnecessarily drops to a minimum tonyp parents: 4097 diff changeset	1603 }
d23d2b18183e 7118202: G1: eden size unnecessarily drops to a minimum tonyp parents: 4097 diff changeset	1604 _rs_length_diff_seq->add((double) rs_length_diff);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1605
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1606 size_t copied_bytes = surviving_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1607 double cost_per_byte_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1608 if (copied_bytes > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1609 cost_per_byte_ms = obj_copy_time / (double) copied_bytes;
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1610 if (_in_marking_window) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1611 _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	1612 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1613 _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	1614 }
342 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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1617 double all_other_time_ms = pause_time_ms -
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1618 (update_rs_time + scan_rs_time + obj_copy_time +
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1619 _mark_closure_time_ms + termination_time);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1620
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1621 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	1622 if (young_cset_region_length() > 0) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1623 young_other_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1624 _recorded_young_cset_choice_time_ms +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1625 _recorded_young_free_cset_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1626 _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	1627 (double) young_cset_region_length());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1628 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1629 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	1630 if (old_cset_region_length() > 0) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1631 non_young_other_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1632 _recorded_non_young_cset_choice_time_ms +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1633 _recorded_non_young_free_cset_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1634
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1635 _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	1636 (double) old_cset_region_length());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1637 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1638
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1639 double constant_other_time_ms = all_other_time_ms -
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1640 (young_other_time_ms + non_young_other_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1641 _constant_other_time_ms_seq->add(constant_other_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1642
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1643 double survival_ratio = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1644 if (_bytes_in_collection_set_before_gc > 0) {
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	1645 survival_ratio = (double) _bytes_copied_during_gc /
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	1646 (double) _bytes_in_collection_set_before_gc;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1647 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1648
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1649 _pending_cards_seq->add((double) _pending_cards);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1650 _rs_lengths_seq->add((double) _max_rs_lengths);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1651
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1652 double expensive_region_limit_ms =
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 677 diff changeset	1653 (double) MaxGCPauseMillis - predict_constant_other_time_ms();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1654 if (expensive_region_limit_ms < 0.0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1655 // this means that the other time was predicted to be longer than
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1656 // than the max pause time
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 677 diff changeset	1657 expensive_region_limit_ms = (double) MaxGCPauseMillis;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1658 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1659 _expensive_region_limit_ms = expensive_region_limit_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1660 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1661
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1662 _in_marking_window = new_in_marking_window;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1663 _in_marking_window_im = new_in_marking_window_im;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1664 _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	1665 update_young_list_target_length();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1666
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1667 // 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	1668 double update_rs_time_goal_ms = _mmu_tracker->max_gc_time() * MILLIUNITS * G1RSetUpdatingPauseTimePercent / 100.0;
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1669 adjust_concurrent_refinement(update_rs_time, update_rs_processed_buffers, update_rs_time_goal_ms);
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	1670
074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	1671 assert(assertMarkedBytesDataOK(), "Marked regions not OK at pause end.");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1672 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1673
3764 053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1674 #define EXT_SIZE_FORMAT "%d%s"
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1675 #define EXT_SIZE_PARAMS(bytes) \
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1676 byte_size_in_proper_unit((bytes)), \
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1677 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	1678
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1679 void G1CollectorPolicy::print_heap_transition() {
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1680 if (PrintGCDetails) {
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1681 YoungList* young_list = _g1->young_list();
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1682 size_t eden_bytes = young_list->eden_used_bytes();
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1683 size_t survivor_bytes = young_list->survivor_used_bytes();
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1684 size_t used_before_gc = _cur_collection_pause_used_at_start_bytes;
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1685 size_t used = _g1->used();
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1686 size_t capacity = _g1->capacity();
3920 af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	1687 size_t eden_capacity =
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	1688 (_young_list_target_length * HeapRegion::GrainBytes) - survivor_bytes;
3764 053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1689
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1690 gclog_or_tty->print_cr(
3920 af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	1691 " [Eden: "EXT_SIZE_FORMAT"("EXT_SIZE_FORMAT")->"EXT_SIZE_FORMAT"("EXT_SIZE_FORMAT") "
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	1692 "Survivors: "EXT_SIZE_FORMAT"->"EXT_SIZE_FORMAT" "
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	1693 "Heap: "EXT_SIZE_FORMAT"("EXT_SIZE_FORMAT")->"
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	1694 EXT_SIZE_FORMAT"("EXT_SIZE_FORMAT")]",
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	1695 EXT_SIZE_PARAMS(_eden_bytes_before_gc),
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	1696 EXT_SIZE_PARAMS(_prev_eden_capacity),
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	1697 EXT_SIZE_PARAMS(eden_bytes),
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	1698 EXT_SIZE_PARAMS(eden_capacity),
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	1699 EXT_SIZE_PARAMS(_survivor_bytes_before_gc),
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	1700 EXT_SIZE_PARAMS(survivor_bytes),
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	1701 EXT_SIZE_PARAMS(used_before_gc),
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	1702 EXT_SIZE_PARAMS(_capacity_before_gc),
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	1703 EXT_SIZE_PARAMS(used),
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	1704 EXT_SIZE_PARAMS(capacity));
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	1705
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds brutisso parents: 3919 diff changeset	1706 _prev_eden_capacity = eden_capacity;
3764 053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1707 } else if (PrintGC) {
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1708 _g1->print_size_transition(gclog_or_tty,
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1709 _cur_collection_pause_used_at_start_bytes,
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1710 _g1->used(), _g1->capacity());
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1711 }
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1712 }
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 2430 diff changeset	1713
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1714 void G1CollectorPolicy::adjust_concurrent_refinement(double update_rs_time,
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1715 double update_rs_processed_buffers,
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1716 double goal_ms) {
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1717 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set();
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1718 ConcurrentG1Refine *cg1r = G1CollectedHeap::heap()->concurrent_g1_refine();
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1719
1282 b81f3572f355 6928059: G1: command line parameter renaming tonyp parents: 1261 diff changeset	1720 if (G1UseAdaptiveConcRefinement) {
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1721 const int k_gy = 3, k_gr = 6;
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1722 const double inc_k = 1.1, dec_k = 0.9;
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1723
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1724 int g = cg1r->green_zone();
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1725 if (update_rs_time > goal_ms) {
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1726 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	1727 } else {
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1728 if (update_rs_time < goal_ms && update_rs_processed_buffers > g) {
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1729 g = (int)MAX2(g * inc_k, g + 1.0);
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1730 }
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1731 }
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1732 // Change the refinement threads params
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1733 cg1r->set_green_zone(g);
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1734 cg1r->set_yellow_zone(g * k_gy);
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1735 cg1r->set_red_zone(g * k_gr);
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1736 cg1r->reinitialize_threads();
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1737
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1738 int processing_threshold_delta = MAX2((int)(cg1r->green_zone() * sigma()), 1);
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1739 int processing_threshold = MIN2(cg1r->green_zone() + processing_threshold_delta,
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1740 cg1r->yellow_zone());
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1741 // Change the barrier params
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1742 dcqs.set_process_completed_threshold(processing_threshold);
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1743 dcqs.set_max_completed_queue(cg1r->red_zone());
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1744 }
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1745
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1746 int curr_queue_size = dcqs.completed_buffers_num();
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1747 if (curr_queue_size >= cg1r->yellow_zone()) {
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1748 dcqs.set_completed_queue_padding(curr_queue_size);
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1749 } else {
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1750 dcqs.set_completed_queue_padding(0);
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1751 }
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1752 dcqs.notify_if_necessary();
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1753 }
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 1088 diff changeset	1754
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1755 double
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1756 G1CollectorPolicy::
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1757 predict_young_collection_elapsed_time_ms(size_t adjustment) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1758 guarantee( adjustment == 0 \|\| adjustment == 1, "invariant" );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1759
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1760 G1CollectedHeap* g1h = G1CollectedHeap::heap();
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1761 size_t young_num = g1h->young_list()->length();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1762 if (young_num == 0)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1763 return 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1764
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1765 young_num += adjustment;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1766 size_t pending_cards = predict_pending_cards();
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1767 size_t rs_lengths = g1h->young_list()->sampled_rs_lengths() +
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1768 predict_rs_length_diff();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1769 size_t card_num;
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1770 if (gcs_are_young()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1771 card_num = predict_young_card_num(rs_lengths);
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1772 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1773 card_num = predict_non_young_card_num(rs_lengths);
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1774 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1775 size_t young_byte_size = young_num * HeapRegion::GrainBytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1776 double accum_yg_surv_rate =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1777 _short_lived_surv_rate_group->accum_surv_rate(adjustment);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1778
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1779 size_t bytes_to_copy =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1780 (size_t) (accum_yg_surv_rate * (double) HeapRegion::GrainBytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1781
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1782 return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1783 predict_rs_update_time_ms(pending_cards) +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1784 predict_rs_scan_time_ms(card_num) +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1785 predict_object_copy_time_ms(bytes_to_copy) +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1786 predict_young_other_time_ms(young_num) +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1787 predict_constant_other_time_ms();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1788 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1789
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1790 double
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1791 G1CollectorPolicy::predict_base_elapsed_time_ms(size_t pending_cards) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1792 size_t rs_length = predict_rs_length_diff();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1793 size_t card_num;
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1794 if (gcs_are_young()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1795 card_num = predict_young_card_num(rs_length);
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1796 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1797 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	1798 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1799 return predict_base_elapsed_time_ms(pending_cards, card_num);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1800 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1801
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1802 double
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1803 G1CollectorPolicy::predict_base_elapsed_time_ms(size_t pending_cards,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1804 size_t scanned_cards) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1805 return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1806 predict_rs_update_time_ms(pending_cards) +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1807 predict_rs_scan_time_ms(scanned_cards) +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1808 predict_constant_other_time_ms();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1809 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1810
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1811 double
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1812 G1CollectorPolicy::predict_region_elapsed_time_ms(HeapRegion* hr,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1813 bool young) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1814 size_t rs_length = hr->rem_set()->occupied();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1815 size_t card_num;
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1816 if (gcs_are_young()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1817 card_num = predict_young_card_num(rs_length);
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1818 } else {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1819 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	1820 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1821 size_t bytes_to_copy = predict_bytes_to_copy(hr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1822
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1823 double region_elapsed_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1824 predict_rs_scan_time_ms(card_num) +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1825 predict_object_copy_time_ms(bytes_to_copy);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1826
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1827 if (young)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1828 region_elapsed_time_ms += predict_young_other_time_ms(1);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1829 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1830 region_elapsed_time_ms += predict_non_young_other_time_ms(1);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1831
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1832 return region_elapsed_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1833 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1834
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1835 size_t
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1836 G1CollectorPolicy::predict_bytes_to_copy(HeapRegion* hr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1837 size_t bytes_to_copy;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1838 if (hr->is_marked())
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1839 bytes_to_copy = hr->max_live_bytes();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1840 else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1841 guarantee( hr->is_young() && hr->age_in_surv_rate_group() != -1,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1842 "invariant" );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1843 int age = hr->age_in_surv_rate_group();
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	1844 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	1845 bytes_to_copy = (size_t) ((double) hr->used() * yg_surv_rate);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1846 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1847
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1848 return bytes_to_copy;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1849 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1850
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1851 void
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1852 G1CollectorPolicy::init_cset_region_lengths(size_t eden_cset_region_length,
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1853 size_t survivor_cset_region_length) {
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	1854 _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	1855 _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	1856 _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	1857 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1858
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1859 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	1860 _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	1861 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1862
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1863 void G1CollectorPolicy::check_if_region_is_too_expensive(double
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1864 predicted_time_ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1865 // I don't think we need to do this when in young GC mode since
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1866 // marking will be initiated next time we hit the soft limit anyway...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1867 if (predicted_time_ms > _expensive_region_limit_ms) {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1868 ergo_verbose2(ErgoMixedGCs,
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1869 "request mixed GCs end",
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1870 ergo_format_reason("predicted region time higher than threshold")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1871 ergo_format_ms("predicted region time")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1872 ergo_format_ms("threshold"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1873 predicted_time_ms, _expensive_region_limit_ms);
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1874 // no point in doing another mixed GC
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	1875 _should_revert_to_young_gcs = true;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1876 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1877 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1878
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1879 void G1CollectorPolicy::update_recent_gc_times(double end_time_sec,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1880 double elapsed_ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1881 _recent_gc_times_ms->add(elapsed_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1882 _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	1883 _prev_collection_pause_end_ms = end_time_sec * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1884 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1885
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1886 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	1887 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	1888 double threshold = _gc_overhead_perc;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1889 if (recent_gc_overhead > threshold) {
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 677 diff changeset	1890 // We will double the existing space, or take
20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 677 diff changeset	1891 // G1ExpandByPercentOfAvailable % of the available expansion
20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 677 diff changeset	1892 // space, whichever is smaller, bounded below by a minimum
20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 677 diff changeset	1893 // expansion (unless that's all that's left.)
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1894 const size_t min_expand_bytes = 1*M;
2188 c33825b68624 6923430: G1: assert(res != 0,"This should have worked.") johnc parents: 2152 diff changeset	1895 size_t reserved_bytes = _g1->max_capacity();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1896 size_t committed_bytes = _g1->capacity();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1897 size_t uncommitted_bytes = reserved_bytes - committed_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1898 size_t expand_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1899 size_t expand_bytes_via_pct =
751 20c6f43950b5 6490395: G1: Tidy up command line flags. johnc parents: 677 diff changeset	1900 uncommitted_bytes * G1ExpandByPercentOfAvailable / 100;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1901 expand_bytes = MIN2(expand_bytes_via_pct, committed_bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1902 expand_bytes = MAX2(expand_bytes, min_expand_bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1903 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	1904
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1905 ergo_verbose5(ErgoHeapSizing,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1906 "attempt heap expansion",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1907 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	1908 "threshold after GC")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1909 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	1910 ergo_format_perc("threshold")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1911 ergo_format_byte("uncommitted")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1912 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	1913 recent_gc_overhead, threshold,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1914 uncommitted_bytes,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	1915 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	1916
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1917 return expand_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1918 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1919 return 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1920 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1921 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1922
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1923 class CountCSClosure: public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1924 G1CollectorPolicy* _g1_policy;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1925 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1926 CountCSClosure(G1CollectorPolicy* g1_policy) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1927 _g1_policy(g1_policy) {}
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1928 bool doHeapRegion(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1929 _g1_policy->_bytes_in_collection_set_before_gc += r->used();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1930 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1931 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1932 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1933
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1934 void G1CollectorPolicy::count_CS_bytes_used() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1935 CountCSClosure cs_closure(this);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1936 _g1->collection_set_iterate(&cs_closure);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1937 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1938
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1939 void G1CollectorPolicy::print_summary(int level,
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1940 const char* str,
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1941 NumberSeq* seq) const {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1942 double sum = seq->sum();
2363 c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	1943 LineBuffer(level + 1).append_and_print_cr("%-24s = %8.2lf s (avg = %8.2lf ms)",
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1944 str, sum / 1000.0, seq->avg());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1945 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1946
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1947 void G1CollectorPolicy::print_summary_sd(int level,
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1948 const char* str,
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	1949 NumberSeq* seq) const {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1950 print_summary(level, str, seq);
2363 c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	1951 LineBuffer(level + 6).append_and_print_cr("(num = %5d, std dev = %8.2lf ms, max = %8.2lf ms)",
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1952 seq->num(), seq->sd(), seq->maximum());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1953 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1954
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1955 void G1CollectorPolicy::check_other_times(int level,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1956 NumberSeq* other_times_ms,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1957 NumberSeq* calc_other_times_ms) const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1958 bool should_print = false;
2363 c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	1959 LineBuffer buf(level + 2);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1960
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1961 double max_sum = MAX2(fabs(other_times_ms->sum()),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1962 fabs(calc_other_times_ms->sum()));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1963 double min_sum = MIN2(fabs(other_times_ms->sum()),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1964 fabs(calc_other_times_ms->sum()));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1965 double sum_ratio = max_sum / min_sum;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1966 if (sum_ratio > 1.1) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1967 should_print = true;
2363 c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	1968 buf.append_and_print_cr("## CALCULATED OTHER SUM DOESN'T MATCH RECORDED ###");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1969 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1970
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1971 double max_avg = MAX2(fabs(other_times_ms->avg()),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1972 fabs(calc_other_times_ms->avg()));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1973 double min_avg = MIN2(fabs(other_times_ms->avg()),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1974 fabs(calc_other_times_ms->avg()));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1975 double avg_ratio = max_avg / min_avg;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1976 if (avg_ratio > 1.1) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1977 should_print = true;
2363 c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	1978 buf.append_and_print_cr("## CALCULATED OTHER AVG DOESN'T MATCH RECORDED ###");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1979 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1980
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1981 if (other_times_ms->sum() < -0.01) {
2363 c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	1982 buf.append_and_print_cr("## RECORDED OTHER SUM IS NEGATIVE ###");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1983 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1984
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1985 if (other_times_ms->avg() < -0.01) {
2363 c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	1986 buf.append_and_print_cr("## RECORDED OTHER AVG IS NEGATIVE ###");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1987 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1988
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1989 if (calc_other_times_ms->sum() < -0.01) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1990 should_print = true;
2363 c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	1991 buf.append_and_print_cr("## CALCULATED OTHER SUM IS NEGATIVE ###");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1992 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1993
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1994 if (calc_other_times_ms->avg() < -0.01) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1995 should_print = true;
2363 c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	1996 buf.append_and_print_cr("## CALCULATED OTHER AVG IS NEGATIVE ###");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1997 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1998
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1999 if (should_print)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2000 print_summary(level, "Other(Calc)", calc_other_times_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2001 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2002
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2003 void G1CollectorPolicy::print_summary(PauseSummary* summary) const {
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1779 diff changeset	2004 bool parallel = G1CollectedHeap::use_parallel_gc_threads();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2005 MainBodySummary* body_summary = summary->main_body_summary();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2006 if (summary->get_total_seq()->num() > 0) {
677 96b229c54d1e 6543938: G1: remove the concept of popularity apetrusenko parents: 648 diff changeset	2007 print_summary_sd(0, "Evacuation Pauses", summary->get_total_seq());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2008 if (body_summary != NULL) {
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	2009 print_summary(1, "Root Region Scan Wait", body_summary->get_root_region_scan_wait_seq());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2010 if (parallel) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2011 print_summary(1, "Parallel Time", body_summary->get_parallel_seq());
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	2012 print_summary(2, "Ext Root Scanning", body_summary->get_ext_root_scan_seq());
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4729 diff changeset	2013 print_summary(2, "SATB Filtering", body_summary->get_satb_filtering_seq());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2014 print_summary(2, "Update RS", body_summary->get_update_rs_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2015 print_summary(2, "Scan RS", body_summary->get_scan_rs_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2016 print_summary(2, "Object Copy", body_summary->get_obj_copy_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2017 print_summary(2, "Termination", body_summary->get_termination_seq());
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	2018 print_summary(2, "Parallel Other", body_summary->get_parallel_other_seq());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2019 {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2020 NumberSeq* other_parts[] = {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2021 body_summary->get_ext_root_scan_seq(),
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4729 diff changeset	2022 body_summary->get_satb_filtering_seq(),
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	2023 body_summary->get_update_rs_seq(),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2024 body_summary->get_scan_rs_seq(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2025 body_summary->get_obj_copy_seq(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2026 body_summary->get_termination_seq()
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2027 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2028 NumberSeq calc_other_times_ms(body_summary->get_parallel_seq(),
1779 6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2029 6, other_parts);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2030 check_other_times(2, body_summary->get_parallel_other_seq(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2031 &calc_other_times_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2032 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2033 } else {
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	2034 print_summary(1, "Ext Root Scanning", body_summary->get_ext_root_scan_seq());
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4729 diff changeset	2035 print_summary(1, "SATB Filtering", body_summary->get_satb_filtering_seq());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2036 print_summary(1, "Update RS", body_summary->get_update_rs_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2037 print_summary(1, "Scan RS", body_summary->get_scan_rs_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2038 print_summary(1, "Object Copy", body_summary->get_obj_copy_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2039 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2040 }
4023 c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	2041 print_summary(1, "Mark Closure", body_summary->get_mark_closure_seq());
c6a6e936dc68 7096030: G1: PrintGCDetails enhancements johnc parents: 4013 diff changeset	2042 print_summary(1, "Clear CT", body_summary->get_clear_ct_seq());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2043 print_summary(1, "Other", summary->get_other_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2044 {
1779 6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2045 if (body_summary != NULL) {
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2046 NumberSeq calc_other_times_ms;
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2047 if (parallel) {
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2048 // parallel
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2049 NumberSeq* other_parts[] = {
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2050 body_summary->get_satb_drain_seq(),
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	2051 body_summary->get_root_region_scan_wait_seq(),
1779 6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2052 body_summary->get_parallel_seq(),
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2053 body_summary->get_clear_ct_seq()
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2054 };
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2055 calc_other_times_ms = NumberSeq(summary->get_total_seq(),
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	2056 4, other_parts);
1779 6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2057 } else {
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2058 // serial
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2059 NumberSeq* other_parts[] = {
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2060 body_summary->get_satb_drain_seq(),
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	2061 body_summary->get_root_region_scan_wait_seq(),
1779 6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2062 body_summary->get_update_rs_seq(),
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2063 body_summary->get_ext_root_scan_seq(),
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4729 diff changeset	2064 body_summary->get_satb_filtering_seq(),
1779 6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2065 body_summary->get_scan_rs_seq(),
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2066 body_summary->get_obj_copy_seq()
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2067 };
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2068 calc_other_times_ms = NumberSeq(summary->get_total_seq(),
4837 eff609af17d7 7127706: G1: re-enable survivors during the initial-mark pause tonyp parents: 4834 diff changeset	2069 7, other_parts);
1779 6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2070 }
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time johnc parents: 1707 diff changeset	2071 check_other_times(1, summary->get_other_seq(), &calc_other_times_ms);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2072 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2073 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2074 } else {
2363 c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	2075 LineBuffer(1).append_and_print_cr("none");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2076 }
2363 c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	2077 LineBuffer(0).append_and_print_cr("");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2078 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2079
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2080 void G1CollectorPolicy::print_tracing_info() const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2081 if (TraceGen0Time) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2082 gclog_or_tty->print_cr("ALL PAUSES");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2083 print_summary_sd(0, "Total", _all_pause_times_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2084 gclog_or_tty->print_cr("");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2085 gclog_or_tty->print_cr("");
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	2086 gclog_or_tty->print_cr(" Young GC Pauses: %8d", _young_pause_num);
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	2087 gclog_or_tty->print_cr(" Mixed GC Pauses: %8d", _mixed_pause_num);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2088 gclog_or_tty->print_cr("");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2089
677 96b229c54d1e 6543938: G1: remove the concept of popularity apetrusenko parents: 648 diff changeset	2090 gclog_or_tty->print_cr("EVACUATION PAUSES");
96b229c54d1e 6543938: G1: remove the concept of popularity apetrusenko parents: 648 diff changeset	2091 print_summary(_summary);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2092
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2093 gclog_or_tty->print_cr("MISC");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2094 print_summary_sd(0, "Stop World", _all_stop_world_times_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2095 print_summary_sd(0, "Yields", _all_yield_times_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2096 for (int i = 0; i < _aux_num; ++i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2097 if (_all_aux_times_ms[i].num() > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2098 char buffer[96];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2099 sprintf(buffer, "Aux%d", i);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2100 print_summary_sd(0, buffer, &_all_aux_times_ms[i]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2101 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2102 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2103 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2104 if (TraceGen1Time) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2105 if (_all_full_gc_times_ms->num() > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2106 gclog_or_tty->print("\n%4d full_gcs: total time = %8.2f s",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2107 _all_full_gc_times_ms->num(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2108 _all_full_gc_times_ms->sum() / 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2109 gclog_or_tty->print_cr(" (avg = %8.2fms).", _all_full_gc_times_ms->avg());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2110 gclog_or_tty->print_cr(" [std. dev = %8.2f ms, max = %8.2f ms]",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2111 _all_full_gc_times_ms->sd(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2112 _all_full_gc_times_ms->maximum());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2113 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2114 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2115 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2116
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2117 void G1CollectorPolicy::print_yg_surv_rate_info() const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2118 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2119 _short_lived_surv_rate_group->print_surv_rate_summary();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2120 // add this call for any other surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2121 #endif // PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2122 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2123
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2124 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2125 // for debugging, bit of a hack...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2126 static char*
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2127 region_num_to_mbs(int length) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2128 static char buffer[64];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2129 double bytes = (double) (length * HeapRegion::GrainBytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2130 double mbs = bytes / (double) (1024 * 1024);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2131 sprintf(buffer, "%7.2lfMB", mbs);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2132 return buffer;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2133 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2134 #endif // PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2135
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	2136 size_t G1CollectorPolicy::max_regions(int purpose) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2137 switch (purpose) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2138 case GCAllocForSurvived:
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	2139 return _max_survivor_regions;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2140 case GCAllocForTenured:
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	2141 return REGIONS_UNLIMITED;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2142 default:
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	2143 ShouldNotReachHere();
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	2144 return REGIONS_UNLIMITED;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2145 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2146 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2147
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	2148 void G1CollectorPolicy::update_max_gc_locker_expansion() {
1991 016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	2149 size_t expansion_region_num = 0;
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	2150 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	2151 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	2152 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	2153 // 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	2154 // less than 1.0) we'll get 1.
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	2155 expansion_region_num = (size_t) ceil(expansion_region_num_d);
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	2156 } else {
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	2157 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	2158 }
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	2159 _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	2160 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	2161 }
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen tonyp parents: 1973 diff changeset	2162
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	2163 // Calculates survivor space parameters.
3919 4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	2164 void G1CollectorPolicy::update_survivors_policy() {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	2165 double max_survivor_regions_d =
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	2166 (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	2167 // 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	2168 // smaller than 1.0) we'll get 1.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	2169 _max_survivor_regions = (size_t) ceil(max_survivor_regions_d);
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations tonyp parents: 3914 diff changeset	2170
3868 ae73da50be4b 7081064: G1: remove develop params G1FixedSurvivorSpaceSize, G1FixedTenuringThreshold, and G1FixedEdenSize tonyp parents: 3867 diff changeset	2171 _tenuring_threshold = _survivors_age_table.compute_tenuring_threshold(
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	2172 HeapRegion::GrainWords * _max_survivor_regions);
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	2173 }
58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	2174
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2175 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2176 class HRSortIndexIsOKClosure: public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2177 CollectionSetChooser* _chooser;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2178 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2179 HRSortIndexIsOKClosure(CollectionSetChooser* chooser) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2180 _chooser(chooser) {}
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2181
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2182 bool doHeapRegion(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2183 if (!r->continuesHumongous()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2184 assert(_chooser->regionProperlyOrdered(r), "Ought to be.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2185 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2186 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2187 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2188 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2189
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	2190 bool G1CollectorPolicy::assertMarkedBytesDataOK() {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2191 HRSortIndexIsOKClosure cl(_collectionSetChooser);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2192 _g1->heap_region_iterate(&cl);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2193 return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2194 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2195 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2196
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2197 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	2198 GCCause::Cause gc_cause) {
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	2199 bool during_cycle = _g1->concurrent_mark()->cmThread()->during_cycle();
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	2200 if (!during_cycle) {
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2201 ergo_verbose1(ErgoConcCycles,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2202 "request concurrent cycle initiation",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2203 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	2204 ergo_format_str("GC cause"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2205 GCCause::to_string(gc_cause));
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	2206 set_initiate_conc_mark_if_possible();
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	2207 return true;
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	2208 } else {
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2209 ergo_verbose1(ErgoConcCycles,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2210 "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	2211 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	2212 ergo_format_str("GC cause"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2213 GCCause::to_string(gc_cause));
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	2214 return false;
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	2215 }
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	2216 }
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	2217
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2218 void
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2219 G1CollectorPolicy::decide_on_conc_mark_initiation() {
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2220 // 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	2221 // initial-mark pause.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2222
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2223 // 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	2224 // 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	2225 // 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	2226 // initial-mark pause).
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2227 assert(!during_initial_mark_pause(), "pre-condition");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2228
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2229 if (initiate_conc_mark_if_possible()) {
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2230 // 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	2231 // 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	2232 // concurrent marking cycle. So we might initiate one.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2233
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2234 bool during_cycle = _g1->concurrent_mark()->cmThread()->during_cycle();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2235 if (!during_cycle) {
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2236 // 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	2237 // 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	2238 // initiate a new cycle.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2239
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2240 set_during_initial_mark_pause();
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	2241 // We do not allow mixed GCs during marking.
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	2242 if (!gcs_are_young()) {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	2243 set_gcs_are_young(true);
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	2244 ergo_verbose0(ErgoMixedGCs,
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	2245 "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	2246 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	2247 }
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2248
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2249 // 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	2250 // we've already acted on it.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2251 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	2252
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2253 ergo_verbose0(ErgoConcCycles,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2254 "initiate concurrent cycle",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2255 ergo_format_reason("concurrent cycle initiation requested"));
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2256 } else {
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2257 // The concurrent marking thread is still finishing up the
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2258 // 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	2259 // overlap. In particular, the concurrent marking thread might
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2260 // 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	2261 // 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	2262 // 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	2263 // 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	2264 // 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	2265 // periodically yields while clearing the next marking bitmap
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2266 // 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	2267 // 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	2268 // 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	2269 ergo_verbose0(ErgoConcCycles,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2270 "do not initiate concurrent cycle",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2271 ergo_format_reason("concurrent cycle already in progress"));
1359 23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2272 }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2273 }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2274 }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") tonyp parents: 1356 diff changeset	2275
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2276 class KnownGarbageClosure: public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2277 CollectionSetChooser* _hrSorted;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2278
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2279 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2280 KnownGarbageClosure(CollectionSetChooser* hrSorted) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2281 _hrSorted(hrSorted)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2282 {}
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2283
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2284 bool doHeapRegion(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2285 // We only include humongous regions in collection
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2286 // sets when concurrent mark shows that their contained object is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2287 // unreachable.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2288
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2289 // Do we have any marking information for this region?
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2290 if (r->is_marked()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2291 // We don't include humongous regions in collection
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2292 // sets because we collect them immediately at the end of a marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2293 // cycle. We also don't include young regions because we must
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2294 // include them in the next collection pause.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2295 if (!r->isHumongous() && !r->is_young()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2296 _hrSorted->addMarkedHeapRegion(r);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2297 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2298 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2299 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2300 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2301 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2302
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2303 class ParKnownGarbageHRClosure: public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2304 CollectionSetChooser* _hrSorted;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2305 jint _marked_regions_added;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2306 jint _chunk_size;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2307 jint _cur_chunk_idx;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2308 jint _cur_chunk_end; // Cur chunk [_cur_chunk_idx, _cur_chunk_end)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2309 int _worker;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2310 int _invokes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2311
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2312 void get_new_chunk() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2313 _cur_chunk_idx = _hrSorted->getParMarkedHeapRegionChunk(_chunk_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2314 _cur_chunk_end = _cur_chunk_idx + _chunk_size;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2315 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2316 void add_region(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2317 if (_cur_chunk_idx == _cur_chunk_end) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2318 get_new_chunk();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2319 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2320 assert(_cur_chunk_idx < _cur_chunk_end, "postcondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2321 _hrSorted->setMarkedHeapRegion(_cur_chunk_idx, r);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2322 _marked_regions_added++;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2323 _cur_chunk_idx++;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2324 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2325
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2326 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2327 ParKnownGarbageHRClosure(CollectionSetChooser* hrSorted,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2328 jint chunk_size,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2329 int worker) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2330 _hrSorted(hrSorted), _chunk_size(chunk_size), _worker(worker),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2331 _marked_regions_added(0), _cur_chunk_idx(0), _cur_chunk_end(0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2332 _invokes(0)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2333 {}
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2334
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2335 bool doHeapRegion(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2336 // We only include humongous regions in collection
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2337 // sets when concurrent mark shows that their contained object is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2338 // unreachable.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2339 _invokes++;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2340
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2341 // Do we have any marking information for this region?
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2342 if (r->is_marked()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2343 // We don't include humongous regions in collection
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2344 // sets because we collect them immediately at the end of a marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2345 // cycle.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2346 // We also do not include young regions in collection sets
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2347 if (!r->isHumongous() && !r->is_young()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2348 add_region(r);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2349 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2350 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2351 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2352 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2353 jint marked_regions_added() { return _marked_regions_added; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2354 int invokes() { return _invokes; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2355 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2356
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2357 class ParKnownGarbageTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2358 CollectionSetChooser* _hrSorted;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2359 jint _chunk_size;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2360 G1CollectedHeap* _g1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2361 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2362 ParKnownGarbageTask(CollectionSetChooser* hrSorted, jint chunk_size) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2363 AbstractGangTask("ParKnownGarbageTask"),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2364 _hrSorted(hrSorted), _chunk_size(chunk_size),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2365 _g1(G1CollectedHeap::heap())
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2366 {}
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2367
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4727 diff changeset	2368 void work(uint worker_id) {
441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4727 diff changeset	2369 ParKnownGarbageHRClosure parKnownGarbageCl(_hrSorted,
441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4727 diff changeset	2370 _chunk_size,
441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4727 diff changeset	2371 worker_id);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2372 // 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	2373 _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	2374 _g1->workers()->active_workers(),
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 342 diff changeset	2375 HeapRegion::InitialClaimValue);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2376 jint regions_added = parKnownGarbageCl.marked_regions_added();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2377 _hrSorted->incNumMarkedHeapRegions(regions_added);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2378 if (G1PrintParCleanupStats) {
2363 c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers brutisso parents: 2188 diff changeset	2379 gclog_or_tty->print_cr(" Thread %d called %d times, added %d regions to list.",
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4727 diff changeset	2380 worker_id, parKnownGarbageCl.invokes(), regions_added);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2381 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2382 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2383 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2384
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2385 void
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	2386 G1CollectorPolicy::record_concurrent_mark_cleanup_end(int no_of_gc_threads) {
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	2387 double start_sec;
074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	2388 if (G1PrintParCleanupStats) {
074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	2389 start_sec = os::elapsedTime();
074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	2390 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2391
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2392 _collectionSetChooser->clearMarkedHeapRegions();
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	2393 double clear_marked_end_sec;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2394 if (G1PrintParCleanupStats) {
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	2395 clear_marked_end_sec = os::elapsedTime();
074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	2396 gclog_or_tty->print_cr(" clear marked regions: %8.3f ms.",
074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	2397 (clear_marked_end_sec - start_sec) * 1000.0);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2398 }
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	2399
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1779 diff changeset	2400 if (G1CollectedHeap::use_parallel_gc_threads()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2401 const size_t OverpartitionFactor = 4;
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	2402 size_t WorkUnit;
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	2403 // The use of MinChunkSize = 8 in the original code
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	2404 // causes some assertion failures when the total number of
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	2405 // 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	2406 // Should the original code also be fixed?
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	2407 if (no_of_gc_threads > 0) {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	2408 const size_t MinWorkUnit =
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	2409 MAX2(_g1->n_regions() / no_of_gc_threads, (size_t) 1U);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	2410 WorkUnit =
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	2411 MAX2(_g1->n_regions() / (no_of_gc_threads * OverpartitionFactor),
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	2412 MinWorkUnit);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	2413 } else {
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	2414 assert(no_of_gc_threads > 0,
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	2415 "The active gc workers should be greater than 0");
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	2416 // In a product build do something reasonable to avoid a crash.
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	2417 const size_t MinWorkUnit =
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	2418 MAX2(_g1->n_regions() / ParallelGCThreads, (size_t) 1U);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	2419 WorkUnit =
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	2420 MAX2(_g1->n_regions() / (ParallelGCThreads * OverpartitionFactor),
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	2421 MinWorkUnit);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	2422 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2423 _collectionSetChooser->prepareForAddMarkedHeapRegionsPar(_g1->n_regions(),
1571 2d127394260e 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb kvn parents: 1394 diff changeset	2424 WorkUnit);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2425 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	2426 (int) WorkUnit);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2427 _g1->workers()->run_task(&parKnownGarbageTask);
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 342 diff changeset	2428
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 342 diff changeset	2429 assert(_g1->check_heap_region_claim_values(HeapRegion::InitialClaimValue),
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 342 diff changeset	2430 "sanity check");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2431 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2432 KnownGarbageClosure knownGarbagecl(_collectionSetChooser);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2433 _g1->heap_region_iterate(&knownGarbagecl);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2434 }
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	2435 double known_garbage_end_sec;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2436 if (G1PrintParCleanupStats) {
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	2437 known_garbage_end_sec = os::elapsedTime();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2438 gclog_or_tty->print_cr(" compute known garbage: %8.3f ms.",
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	2439 (known_garbage_end_sec - clear_marked_end_sec) * 1000.0);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2440 }
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	2441
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2442 _collectionSetChooser->sortMarkedHeapRegions();
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	2443 double end_sec = os::elapsedTime();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2444 if (G1PrintParCleanupStats) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2445 gclog_or_tty->print_cr(" sorting: %8.3f ms.",
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	2446 (end_sec - known_garbage_end_sec) * 1000.0);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2447 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2448
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	2449 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	2450 _concurrent_mark_cleanup_times_ms->add(elapsed_time_ms);
074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	2451 _cur_mark_stop_world_time_ms += elapsed_time_ms;
074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	2452 _prev_collection_pause_end_ms += elapsed_time_ms;
074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	2453 _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	2454 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2455
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2456 // 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	2457 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	2458 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	2459 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	2460
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2461 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	2462 hr->set_in_collection_set(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2463 hr->set_next_in_collection_set(_collection_set);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2464 _collection_set = hr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2465 _collection_set_bytes_used_before += hr->used();
526 818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 470 diff changeset	2466 _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	2467 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	2468 _recorded_rs_lengths += rs_length;
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	2469 _old_cset_region_length += 1;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2470 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2471
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2472 // 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	2473 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	2474 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	2475
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2476 _inc_cset_head = NULL;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2477 _inc_cset_tail = NULL;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2478 _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	2479
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2480 _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	2481 _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	2482 _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	2483 _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	2484 _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	2485 _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	2486 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2487
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	2488 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	2489 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	2490 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	2491
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	2492 // 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	2493 // _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	2494 // 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	2495 // 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	2496 // 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	2497 // the "main" fields.
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	2498
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	2499 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	2500 _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	2501 } else {
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	2502 // 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	2503 // 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	2504 // 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	2505 // 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	2506 // 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	2507 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	2508 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	2509 _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	2510 } else {
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	2511 _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	2512 }
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	2513 }
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	2514 _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	2515 _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	2516
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	2517 _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	2518 _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	2519 }
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	2520
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2521 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	2522 // 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	2523 // * 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	2524 // evacuation pause,
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2525 // * 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	2526 // 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	2527 // * 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	2528 // 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	2529 // 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	2530 // 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	2531 // 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	2532 // refine thread (RSet sampling).
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2533
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2534 double region_elapsed_time_ms = predict_region_elapsed_time_ms(hr, true);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2535 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	2536 _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	2537 _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	2538 _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	2539
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2540 // 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	2541 // 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	2542 // 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	2543 // rset sampling code
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2544 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	2545 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	2546 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2547
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	2548 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	2549 size_t new_rs_length) {
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	2550 // 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	2551 assert(hr->is_young(), "Precondition");
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	2552 assert(!SafepointSynchronize::is_at_safepoint(),
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	2553 "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	2554
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	2555 // 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	2556 // _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	2557 // 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	2558 // 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	2559 // 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	2560 // 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	2561 // 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	2562 // 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	2563
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	2564 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	2565 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	2566 _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	2567
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2568 double old_elapsed_time_ms = hr->predicted_elapsed_time_ms();
4727 67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	2569 double new_region_elapsed_time_ms = predict_region_elapsed_time_ms(hr, true);
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	2570 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	2571 _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	2572
67fdcb391461 7119027: G1: use atomics to update RS length / predict time of inc CSet tonyp parents: 4710 diff changeset	2573 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	2574 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	2575 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2576
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2577 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	2578 assert(hr->is_young(), "invariant");
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	2579 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	2580 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	2581
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2582 // 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	2583 // 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	2584 // 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	2585 // 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	2586 // 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	2587 // 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	2588
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2589 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	2590 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	2591
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2592 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	2593 _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	2594
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2595 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	2596 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	2597 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	2598
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2599 _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	2600 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2601
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2602 // 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	2603 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	2604 // 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	2605 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	2606
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2607 // Do the 'common' stuff
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2608 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	2609
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2610 // 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	2611 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	2612 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	2613 _inc_cset_head = hr;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2614 } else {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2615 _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	2616 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2617 _inc_cset_tail = hr;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2618 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2619
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2620 // 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	2621 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	2622 // 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	2623 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	2624
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2625 // Do the 'common' stuff
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2626 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	2627
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2628 // 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	2629 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	2630 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	2631 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	2632 _inc_cset_tail = hr;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2633 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2634 _inc_cset_head = hr;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2635 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2636
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2637 #ifndef PRODUCT
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2638 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	2639 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	2640
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2641 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	2642 HeapRegion* csr = list_head;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2643 while (csr != NULL) {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2644 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	2645 assert(csr->in_collection_set(), "bad CS");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2646 st->print_cr(" [%08x-%08x], t: %08x, P: %08x, N: %08x, C: %08x, "
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2647 "age: %4d, y: %d, surv: %d",
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2648 csr->bottom(), csr->end(),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2649 csr->top(),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2650 csr->prev_top_at_mark_start(),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2651 csr->next_top_at_mark_start(),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2652 csr->top_at_conc_mark_count(),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2653 csr->age_in_surv_rate_group_cond(),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2654 csr->is_young(),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2655 csr->is_survivor());
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2656 csr = next;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2657 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2658 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2659 #endif // !PRODUCT
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2660
4013 074f0252cc13 7088680: G1: Cleanup in the G1CollectorPolicy class tonyp parents: 3986 diff changeset	2661 void G1CollectorPolicy::choose_collection_set(double target_pause_time_ms) {
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2662 // Set this here - in case we're not doing young collections.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2663 double non_young_start_time_sec = os::elapsedTime();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2664
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2665 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	2666 finalize_incremental_cset_building();
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2667
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	2668 guarantee(target_pause_time_ms > 0.0,
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	2669 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	2670 target_pause_time_ms));
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	2671 guarantee(_collection_set == NULL, "Precondition");
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2672
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2673 double base_time_ms = predict_base_elapsed_time_ms(_pending_cards);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2674 double predicted_pause_time_ms = base_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2675
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	2676 double time_remaining_ms = target_pause_time_ms - base_time_ms;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2677
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2678 ergo_verbose3(ErgoCSetConstruction \| ErgoHigh,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2679 "start choosing CSet",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2680 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	2681 ergo_format_ms("remaining time")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2682 ergo_format_ms("target pause time"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2683 base_time_ms, time_remaining_ms, target_pause_time_ms);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2684
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2685 // the 10% and 50% values are arbitrary...
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2686 double threshold = 0.10 * target_pause_time_ms;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2687 if (time_remaining_ms < threshold) {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2688 double prev_time_remaining_ms = time_remaining_ms;
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	2689 time_remaining_ms = 0.50 * target_pause_time_ms;
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2690 ergo_verbose3(ErgoCSetConstruction,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2691 "adjust remaining time",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2692 ergo_format_reason("remaining time lower than threshold")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2693 ergo_format_ms("remaining time")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2694 ergo_format_ms("threshold")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2695 ergo_format_ms("adjusted remaining time"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2696 prev_time_remaining_ms, threshold, time_remaining_ms);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2697 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2698
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2699 size_t expansion_bytes = _g1->expansion_regions() * HeapRegion::GrainBytes;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2700
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2701 HeapRegion* hr;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2702 double young_start_time_sec = os::elapsedTime();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2703
677 96b229c54d1e 6543938: G1: remove the concept of popularity apetrusenko parents: 648 diff changeset	2704 _collection_set_bytes_used_before = 0;
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	2705 _last_gc_was_young = gcs_are_young() ? true : false;
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	2706
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	2707 if (_last_gc_was_young) {
41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	2708 ++_young_pause_num;
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2709 } else {
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	2710 ++_mixed_pause_num;
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2711 }
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2712
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2713 // 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	2714 // 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	2715 // [Newly Young Regions ++ Survivors from last pause].
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2716
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	2717 size_t survivor_region_length = young_list->survivor_length();
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	2718 size_t eden_region_length = young_list->length() - survivor_region_length;
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	2719 init_cset_region_lengths(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	2720 hr = young_list->first_survivor_region();
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2721 while (hr != NULL) {
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2722 assert(hr->is_survivor(), "badly formed young list");
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2723 hr->set_young();
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2724 hr = hr->get_next_young_region();
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2725 }
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2726
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2727 // 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	2728 young_list->clear_survivors();
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2729
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2730 _collection_set = _inc_cset_head;
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2731 _collection_set_bytes_used_before = _inc_cset_bytes_used_before;
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2732 time_remaining_ms -= _inc_cset_predicted_elapsed_time_ms;
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2733 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	2734
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2735 ergo_verbose3(ErgoCSetConstruction \| ErgoHigh,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2736 "add young regions to CSet",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2737 ergo_format_region("eden")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2738 ergo_format_region("survivors")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2739 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	2740 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	2741 _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	2742
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2743 // The number of recorded young regions is the incremental
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2744 // collection set's current size
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2745 set_recorded_rs_lengths(_inc_cset_recorded_rs_lengths);
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2746
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2747 double young_end_time_sec = os::elapsedTime();
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2748 _recorded_young_cset_choice_time_ms =
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2749 (young_end_time_sec - young_start_time_sec) * 1000.0;
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2750
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2751 // We are doing young collections so reset this.
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2752 non_young_start_time_sec = young_end_time_sec;
ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	2753
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	2754 if (!gcs_are_young()) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2755 bool should_continue = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2756 NumberSeq seq;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2757 double avg_prediction = 100000000000000000.0; // something very large
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2758
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2759 double prev_predicted_pause_time_ms = predicted_pause_time_ms;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2760 do {
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	2761 // Note that add_old_region_to_cset() increments the
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	2762 // _old_cset_region_length field and cset_region_length() returns the
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	2763 // sum of _eden_cset_region_length, _survivor_cset_region_length, and
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	2764 // _old_cset_region_length. So, as old regions are added to the
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	2765 // CSet, _old_cset_region_length will be incremented and
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	2766 // cset_region_length(), which is used below, will always reflect
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	2767 // the the total number of regions added up to this point to the CSet.
a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	2768
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2769 hr = _collectionSetChooser->getNextMarkedRegion(time_remaining_ms,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2770 avg_prediction);
677 96b229c54d1e 6543938: G1: remove the concept of popularity apetrusenko parents: 648 diff changeset	2771 if (hr != NULL) {
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 4025 diff changeset	2772 _g1->old_set_remove(hr);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2773 double predicted_time_ms = predict_region_elapsed_time_ms(hr, false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2774 time_remaining_ms -= predicted_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2775 predicted_pause_time_ms += predicted_time_ms;
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	2776 add_old_region_to_cset(hr);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2777 seq.add(predicted_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2778 avg_prediction = seq.avg() + seq.sd();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2779 }
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2780
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2781 should_continue = true;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2782 if (hr == NULL) {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2783 // No need for an ergo verbose message here,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2784 // getNextMarkRegion() does this when it returns NULL.
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2785 should_continue = false;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2786 } else {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2787 if (adaptive_young_list_length()) {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2788 if (time_remaining_ms < 0.0) {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2789 ergo_verbose1(ErgoCSetConstruction,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2790 "stop adding old regions to CSet",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2791 ergo_format_reason("remaining time is lower than 0")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2792 ergo_format_ms("remaining time"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2793 time_remaining_ms);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2794 should_continue = false;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2795 }
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2796 } else {
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	2797 if (cset_region_length() >= _young_list_fixed_length) {
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2798 ergo_verbose2(ErgoCSetConstruction,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2799 "stop adding old regions to CSet",
3927 f1b4e0e0bdad 7089625: G1: policy for how many old regions to add to the CSet (when young gen is fixed) is broken tonyp parents: 3920 diff changeset	2800 ergo_format_reason("CSet length reached target")
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2801 ergo_format_region("CSet")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2802 ergo_format_region("young target"),
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	2803 cset_region_length(), _young_list_fixed_length);
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2804 should_continue = false;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2805 }
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2806 }
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2807 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2808 } while (should_continue);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2809
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2810 if (!adaptive_young_list_length() &&
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	2811 cset_region_length() < _young_list_fixed_length) {
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2812 ergo_verbose2(ErgoCSetConstruction,
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	2813 "request mixed GCs end",
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2814 ergo_format_reason("CSet length lower than target")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2815 ergo_format_region("CSet")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2816 ergo_format_region("young target"),
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	2817 cset_region_length(), _young_list_fixed_length);
4710 41406797186b 7113012: G1: rename not-fully-young GCs as "mixed" tonyp parents: 4130 diff changeset	2818 _should_revert_to_young_gcs = true;
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2819 }
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2820
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2821 ergo_verbose2(ErgoCSetConstruction \| ErgoHigh,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2822 "add old regions to CSet",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2823 ergo_format_region("old")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2824 ergo_format_ms("predicted old region time"),
4090 a88de71c4e3a 7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class tonyp parents: 4072 diff changeset	2825 old_cset_region_length(),
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2826 predicted_pause_time_ms - prev_predicted_pause_time_ms);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2827 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2828
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2829 stop_incremental_cset_building();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	2830
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2831 count_CS_bytes_used();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2832
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2833 ergo_verbose5(ErgoCSetConstruction,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2834 "finish choosing CSet",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2835 ergo_format_region("eden")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2836 ergo_format_region("survivors")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2837 ergo_format_region("old")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2838 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	2839 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	2840 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	2841 old_cset_region_length(),
3914 20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions tonyp parents: 3868 diff changeset	2842 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	2843
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2844 double non_young_end_time_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2845 _recorded_non_young_cset_choice_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2846 (non_young_end_time_sec - non_young_start_time_sec) * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	2847 }

Mercurial > hg > truffle

annotate src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp @ 4837:eff609af17d7