Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/g1/concurrentMarkThread.cpp @ 10405:f2110083203d
8005849: JEP 167: Event-Based JVM Tracing
Reviewed-by: acorn, coleenp, sla
Contributed-by: Karen Kinnear <karen.kinnear@oracle.com>, Bengt Rutisson <bengt.rutisson@oracle.com>, Calvin Cheung <calvin.cheung@oracle.com>, Erik Gahlin <erik.gahlin@oracle.com>, Erik Helin <erik.helin@oracle.com>, Jesper Wilhelmsson <jesper.wilhelmsson@oracle.com>, Keith McGuigan <keith.mcguigan@oracle.com>, Mattias Tobiasson <mattias.tobiasson@oracle.com>, Markus Gronlund <markus.gronlund@oracle.com>, Mikael Auno <mikael.auno@oracle.com>, Nils Eliasson <nils.eliasson@oracle.com>, Nils Loodin <nils.loodin@oracle.com>, Rickard Backman <rickard.backman@oracle.com>, Staffan Larsen <staffan.larsen@oracle.com>, Stefan Karlsson <stefan.karlsson@oracle.com>, Yekaterina Kantserova <yekaterina.kantserova@oracle.com>
| author | sla |
|---|---|
| date | Mon, 10 Jun 2013 11:30:51 +0200 |
| parents | 96c885895d22 |
| children | 1772223a25a2 |
| rev | line source |
|---|---|
| 342 | 1 /* |
|
7450
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
6120
diff
changeset
|
2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. |
| 342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1019
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1019
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:
1019
diff
changeset
|
21 * questions. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
| 27 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" | |
| 28 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5963
diff
changeset
|
29 #include "gc_implementation/g1/g1Log.hpp" |
| 1972 | 30 #include "gc_implementation/g1/g1MMUTracker.hpp" |
| 31 #include "gc_implementation/g1/vm_operations_g1.hpp" | |
| 32 #include "memory/resourceArea.hpp" | |
| 33 #include "runtime/vmThread.hpp" | |
| 342 | 34 |
| 35 // ======= Concurrent Mark Thread ======== | |
| 36 | |
| 37 // The CM thread is created when the G1 garbage collector is used | |
| 38 | |
| 39 SurrogateLockerThread* | |
| 40 ConcurrentMarkThread::_slt = NULL; | |
| 41 | |
| 42 ConcurrentMarkThread::ConcurrentMarkThread(ConcurrentMark* cm) : | |
| 43 ConcurrentGCThread(), | |
| 44 _cm(cm), | |
| 45 _started(false), | |
| 46 _in_progress(false), | |
| 47 _vtime_accum(0.0), | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4096
diff
changeset
|
48 _vtime_mark_accum(0.0) { |
| 342 | 49 create_and_start(); |
| 50 } | |
| 51 | |
| 52 class CMCheckpointRootsFinalClosure: public VoidClosure { | |
| 53 | |
| 54 ConcurrentMark* _cm; | |
| 55 public: | |
| 56 | |
| 57 CMCheckpointRootsFinalClosure(ConcurrentMark* cm) : | |
| 58 _cm(cm) {} | |
| 59 | |
| 60 void do_void(){ | |
| 61 _cm->checkpointRootsFinal(false); // !clear_all_soft_refs | |
| 62 } | |
| 63 }; | |
| 64 | |
| 65 class CMCleanUp: public VoidClosure { | |
| 66 ConcurrentMark* _cm; | |
| 67 public: | |
| 68 | |
| 69 CMCleanUp(ConcurrentMark* cm) : | |
| 70 _cm(cm) {} | |
| 71 | |
| 72 void do_void(){ | |
| 73 _cm->cleanup(); | |
| 74 } | |
| 75 }; | |
| 76 | |
| 77 | |
| 78 | |
| 79 void ConcurrentMarkThread::run() { | |
| 80 initialize_in_thread(); | |
| 81 _vtime_start = os::elapsedVTime(); | |
| 82 wait_for_universe_init(); | |
| 83 | |
| 2152 | 84 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
| 85 G1CollectorPolicy* g1_policy = g1h->g1_policy(); | |
| 342 | 86 G1MMUTracker *mmu_tracker = g1_policy->mmu_tracker(); |
| 87 Thread *current_thread = Thread::current(); | |
| 88 | |
| 89 while (!_should_terminate) { | |
| 90 // wait until started is set. | |
| 91 sleepBeforeNextCycle(); | |
| 92 { | |
| 93 ResourceMark rm; | |
| 94 HandleMark hm; | |
| 95 double cycle_start = os::elapsedVTime(); | |
| 96 | |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
97 // We have to ensure that we finish scanning the root regions |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
98 // before the next GC takes place. To ensure this we have to |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
99 // make sure that we do not join the STS until the root regions |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
100 // have been scanned. If we did then it's possible that a |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
101 // subsequent GC could block us from joining the STS and proceed |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
102 // without the root regions have been scanned which would be a |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
103 // correctness issue. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
104 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
105 double scan_start = os::elapsedTime(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
106 if (!cm()->has_aborted()) { |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5963
diff
changeset
|
107 if (G1Log::fine()) { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
108 gclog_or_tty->date_stamp(PrintGCDateStamps); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
109 gclog_or_tty->stamp(PrintGCTimeStamps); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
110 gclog_or_tty->print_cr("[GC concurrent-root-region-scan-start]"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
111 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
112 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
113 _cm->scanRootRegions(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
114 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
115 double scan_end = os::elapsedTime(); |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5963
diff
changeset
|
116 if (G1Log::fine()) { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
117 gclog_or_tty->date_stamp(PrintGCDateStamps); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
118 gclog_or_tty->stamp(PrintGCTimeStamps); |
|
8109
96c885895d22
8007221: G1: concurrent phase durations do not state the time units ("secs")
johnc
parents:
7450
diff
changeset
|
119 gclog_or_tty->print_cr("[GC concurrent-root-region-scan-end, %1.7lf secs]", |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
120 scan_end - scan_start); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
121 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
122 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
123 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
124 double mark_start_sec = os::elapsedTime(); |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5963
diff
changeset
|
125 if (G1Log::fine()) { |
| 342 | 126 gclog_or_tty->date_stamp(PrintGCDateStamps); |
| 127 gclog_or_tty->stamp(PrintGCTimeStamps); | |
|
619
7ea5ca260b28
6814467: G1: small fixes related to concurrent marking verboseness
tonyp
parents:
342
diff
changeset
|
128 gclog_or_tty->print_cr("[GC concurrent-mark-start]"); |
| 342 | 129 } |
| 130 | |
| 131 int iter = 0; | |
| 132 do { | |
| 133 iter++; | |
| 134 if (!cm()->has_aborted()) { | |
| 135 _cm->markFromRoots(); | |
| 136 } | |
| 137 | |
| 138 double mark_end_time = os::elapsedVTime(); | |
| 139 double mark_end_sec = os::elapsedTime(); | |
| 140 _vtime_mark_accum += (mark_end_time - cycle_start); | |
| 141 if (!cm()->has_aborted()) { | |
| 142 if (g1_policy->adaptive_young_list_length()) { | |
| 143 double now = os::elapsedTime(); | |
| 144 double remark_prediction_ms = g1_policy->predict_remark_time_ms(); | |
| 145 jlong sleep_time_ms = mmu_tracker->when_ms(now, remark_prediction_ms); | |
| 146 os::sleep(current_thread, sleep_time_ms, false); | |
| 147 } | |
| 148 | |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5963
diff
changeset
|
149 if (G1Log::fine()) { |
| 342 | 150 gclog_or_tty->date_stamp(PrintGCDateStamps); |
| 151 gclog_or_tty->stamp(PrintGCTimeStamps); | |
|
8109
96c885895d22
8007221: G1: concurrent phase durations do not state the time units ("secs")
johnc
parents:
7450
diff
changeset
|
152 gclog_or_tty->print_cr("[GC concurrent-mark-end, %1.7lf secs]", |
| 342 | 153 mark_end_sec - mark_start_sec); |
| 154 } | |
| 155 | |
| 156 CMCheckpointRootsFinalClosure final_cl(_cm); | |
| 10405 | 157 VM_CGC_Operation op(&final_cl, "GC remark", true /* needs_pll */); |
| 342 | 158 VMThread::execute(&op); |
| 159 } | |
| 160 if (cm()->restart_for_overflow()) { | |
|
7450
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
6120
diff
changeset
|
161 if (G1TraceMarkStackOverflow) { |
|
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
6120
diff
changeset
|
162 gclog_or_tty->print_cr("Restarting conc marking because of MS overflow " |
|
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
6120
diff
changeset
|
163 "in remark (restart #%d).", iter); |
|
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
6120
diff
changeset
|
164 } |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5963
diff
changeset
|
165 if (G1Log::fine()) { |
| 342 | 166 gclog_or_tty->date_stamp(PrintGCDateStamps); |
| 167 gclog_or_tty->stamp(PrintGCTimeStamps); | |
| 168 gclog_or_tty->print_cr("[GC concurrent-mark-restart-for-overflow]"); | |
| 169 } | |
| 170 } | |
| 171 } while (cm()->restart_for_overflow()); | |
|
4022
db89aa49298f
7099824: G1: we should take the pending list lock before doing the remark pause
johnc
parents:
4012
diff
changeset
|
172 |
| 342 | 173 double end_time = os::elapsedVTime(); |
| 174 // Update the total virtual time before doing this, since it will try | |
| 175 // to measure it to get the vtime for this marking. We purposely | |
| 176 // neglect the presumably-short "completeCleanup" phase here. | |
| 177 _vtime_accum = (end_time - _vtime_start); | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4096
diff
changeset
|
178 |
| 342 | 179 if (!cm()->has_aborted()) { |
| 180 if (g1_policy->adaptive_young_list_length()) { | |
| 181 double now = os::elapsedTime(); | |
| 182 double cleanup_prediction_ms = g1_policy->predict_cleanup_time_ms(); | |
| 183 jlong sleep_time_ms = mmu_tracker->when_ms(now, cleanup_prediction_ms); | |
| 184 os::sleep(current_thread, sleep_time_ms, false); | |
| 185 } | |
| 186 | |
| 187 CMCleanUp cl_cl(_cm); | |
| 10405 | 188 VM_CGC_Operation op(&cl_cl, "GC cleanup", false /* needs_pll */); |
| 342 | 189 VMThread::execute(&op); |
| 190 } else { | |
|
4096
00dd86e542eb
7114303: G1: assert(_g1->mark_in_progress()) failed: shouldn't be here otherwise
johnc
parents:
4022
diff
changeset
|
191 // We don't want to update the marking status if a GC pause |
|
00dd86e542eb
7114303: G1: assert(_g1->mark_in_progress()) failed: shouldn't be here otherwise
johnc
parents:
4022
diff
changeset
|
192 // is already underway. |
|
00dd86e542eb
7114303: G1: assert(_g1->mark_in_progress()) failed: shouldn't be here otherwise
johnc
parents:
4022
diff
changeset
|
193 _sts.join(); |
| 2152 | 194 g1h->set_marking_complete(); |
|
4096
00dd86e542eb
7114303: G1: assert(_g1->mark_in_progress()) failed: shouldn't be here otherwise
johnc
parents:
4022
diff
changeset
|
195 _sts.leave(); |
| 342 | 196 } |
| 197 | |
| 2152 | 198 // Check if cleanup set the free_regions_coming flag. If it |
| 199 // hasn't, we can just skip the next step. | |
| 200 if (g1h->free_regions_coming()) { | |
| 201 // The following will finish freeing up any regions that we | |
| 202 // found to be empty during cleanup. We'll do this part | |
| 203 // without joining the suspendible set. If an evacuation pause | |
| 2361 | 204 // takes place, then we would carry on freeing regions in |
| 2152 | 205 // case they are needed by the pause. If a Full GC takes |
| 2361 | 206 // place, it would wait for us to process the regions |
| 2152 | 207 // reclaimed by cleanup. |
| 208 | |
| 342 | 209 double cleanup_start_sec = os::elapsedTime(); |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5963
diff
changeset
|
210 if (G1Log::fine()) { |
| 342 | 211 gclog_or_tty->date_stamp(PrintGCDateStamps); |
| 212 gclog_or_tty->stamp(PrintGCTimeStamps); | |
| 213 gclog_or_tty->print_cr("[GC concurrent-cleanup-start]"); | |
| 214 } | |
| 215 | |
|
4012
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
216 // Now do the concurrent cleanup operation. |
| 342 | 217 _cm->completeCleanup(); |
|
4012
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
218 |
| 2185 | 219 // Notify anyone who's waiting that there are no more free |
|
4012
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
220 // regions coming. We have to do this before we join the STS |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
221 // (in fact, we should not attempt to join the STS in the |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
222 // interval between finishing the cleanup pause and clearing |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
223 // the free_regions_coming flag) otherwise we might deadlock: |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
224 // a GC worker could be blocked waiting for the notification |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
225 // whereas this thread will be blocked for the pause to finish |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
226 // while it's trying to join the STS, which is conditional on |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
227 // the GC workers finishing. |
| 2185 | 228 g1h->reset_free_regions_coming(); |
| 229 | |
| 2152 | 230 double cleanup_end_sec = os::elapsedTime(); |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5963
diff
changeset
|
231 if (G1Log::fine()) { |
| 2152 | 232 gclog_or_tty->date_stamp(PrintGCDateStamps); |
| 233 gclog_or_tty->stamp(PrintGCTimeStamps); | |
|
8109
96c885895d22
8007221: G1: concurrent phase durations do not state the time units ("secs")
johnc
parents:
7450
diff
changeset
|
234 gclog_or_tty->print_cr("[GC concurrent-cleanup-end, %1.7lf secs]", |
| 2152 | 235 cleanup_end_sec - cleanup_start_sec); |
| 342 | 236 } |
| 237 } | |
| 2152 | 238 guarantee(cm()->cleanup_list_is_empty(), |
| 239 "at this point there should be no regions on the cleanup list"); | |
| 342 | 240 |
|
4012
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
241 // There is a tricky race before recording that the concurrent |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
242 // cleanup has completed and a potential Full GC starting around |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
243 // the same time. We want to make sure that the Full GC calls |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
244 // abort() on concurrent mark after |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
245 // record_concurrent_mark_cleanup_completed(), since abort() is |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
246 // the method that will reset the concurrent mark state. If we |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
247 // end up calling record_concurrent_mark_cleanup_completed() |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
248 // after abort() then we might incorrectly undo some of the work |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
249 // abort() did. Checking the has_aborted() flag after joining |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
250 // the STS allows the correct ordering of the two methods. There |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
251 // are two scenarios: |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
252 // |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
253 // a) If we reach here before the Full GC, the fact that we have |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
254 // joined the STS means that the Full GC cannot start until we |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
255 // leave the STS, so record_concurrent_mark_cleanup_completed() |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
256 // will complete before abort() is called. |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
257 // |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
258 // b) If we reach here during the Full GC, we'll be held up from |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
259 // joining the STS until the Full GC is done, which means that |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
260 // abort() will have completed and has_aborted() will return |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
261 // true to prevent us from calling |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
262 // record_concurrent_mark_cleanup_completed() (and, in fact, it's |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
263 // not needed any more as the concurrent mark state has been |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
264 // already reset). |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
265 _sts.join(); |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
266 if (!cm()->has_aborted()) { |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
267 g1_policy->record_concurrent_mark_cleanup_completed(); |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
268 } |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
269 _sts.leave(); |
|
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
270 |
| 342 | 271 if (cm()->has_aborted()) { |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5963
diff
changeset
|
272 if (G1Log::fine()) { |
| 342 | 273 gclog_or_tty->date_stamp(PrintGCDateStamps); |
| 274 gclog_or_tty->stamp(PrintGCTimeStamps); | |
| 275 gclog_or_tty->print_cr("[GC concurrent-mark-abort]"); | |
| 276 } | |
| 277 } | |
| 278 | |
|
4012
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
279 // We now want to allow clearing of the marking bitmap to be |
| 342 | 280 // suspended by a collection pause. |
| 281 _sts.join(); | |
| 282 _cm->clearNextBitmap(); | |
| 283 _sts.leave(); | |
| 284 } | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1552
diff
changeset
|
285 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1552
diff
changeset
|
286 // Update the number of full collections that have been |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1552
diff
changeset
|
287 // completed. This will also notify the FullGCCount_lock in case a |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1552
diff
changeset
|
288 // Java thread is waiting for a full GC to happen (e.g., it |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1552
diff
changeset
|
289 // called System.gc() with +ExplicitGCInvokesConcurrent). |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1972
diff
changeset
|
290 _sts.join(); |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6007
diff
changeset
|
291 g1h->increment_old_marking_cycles_completed(true /* concurrent */); |
| 10405 | 292 g1h->register_concurrent_cycle_end(); |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1972
diff
changeset
|
293 _sts.leave(); |
| 342 | 294 } |
| 295 assert(_should_terminate, "just checking"); | |
| 296 | |
| 297 terminate(); | |
| 298 } | |
| 299 | |
| 300 | |
| 301 void ConcurrentMarkThread::yield() { | |
| 302 _sts.yield("Concurrent Mark"); | |
| 303 } | |
| 304 | |
| 305 void ConcurrentMarkThread::stop() { | |
| 306 // it is ok to take late safepoints here, if needed | |
| 307 MutexLockerEx mu(Terminator_lock); | |
| 308 _should_terminate = true; | |
| 309 while (!_has_terminated) { | |
| 310 Terminator_lock->wait(); | |
| 311 } | |
| 312 } | |
| 313 | |
| 1019 | 314 void ConcurrentMarkThread::print() const { |
| 315 print_on(tty); | |
| 316 } | |
| 317 | |
| 318 void ConcurrentMarkThread::print_on(outputStream* st) const { | |
| 319 st->print("\"G1 Main Concurrent Mark GC Thread\" "); | |
| 320 Thread::print_on(st); | |
| 321 st->cr(); | |
| 342 | 322 } |
| 323 | |
| 324 void ConcurrentMarkThread::sleepBeforeNextCycle() { | |
| 325 // We join here because we don't want to do the "shouldConcurrentMark()" | |
| 326 // below while the world is otherwise stopped. | |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1656
diff
changeset
|
327 assert(!in_progress(), "should have been cleared"); |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1656
diff
changeset
|
328 |
| 342 | 329 MutexLockerEx x(CGC_lock, Mutex::_no_safepoint_check_flag); |
| 330 while (!started()) { | |
| 331 CGC_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 332 } | |
| 333 set_in_progress(); | |
| 334 clear_started(); | |
| 335 } | |
| 336 | |
|
4022
db89aa49298f
7099824: G1: we should take the pending list lock before doing the remark pause
johnc
parents:
4012
diff
changeset
|
337 // Note: As is the case with CMS - this method, although exported |
|
db89aa49298f
7099824: G1: we should take the pending list lock before doing the remark pause
johnc
parents:
4012
diff
changeset
|
338 // by the ConcurrentMarkThread, which is a non-JavaThread, can only |
|
db89aa49298f
7099824: G1: we should take the pending list lock before doing the remark pause
johnc
parents:
4012
diff
changeset
|
339 // be called by a JavaThread. Currently this is done at vm creation |
|
db89aa49298f
7099824: G1: we should take the pending list lock before doing the remark pause
johnc
parents:
4012
diff
changeset
|
340 // time (post-vm-init) by the main/Primordial (Java)Thread. |
|
db89aa49298f
7099824: G1: we should take the pending list lock before doing the remark pause
johnc
parents:
4012
diff
changeset
|
341 // XXX Consider changing this in the future to allow the CM thread |
| 342 | 342 // itself to create this thread? |
| 343 void ConcurrentMarkThread::makeSurrogateLockerThread(TRAPS) { | |
|
4022
db89aa49298f
7099824: G1: we should take the pending list lock before doing the remark pause
johnc
parents:
4012
diff
changeset
|
344 assert(UseG1GC, "SLT thread needed only for concurrent GC"); |
|
db89aa49298f
7099824: G1: we should take the pending list lock before doing the remark pause
johnc
parents:
4012
diff
changeset
|
345 assert(THREAD->is_Java_thread(), "must be a Java thread"); |
| 342 | 346 assert(_slt == NULL, "SLT already created"); |
| 347 _slt = SurrogateLockerThread::make(THREAD); | |
| 348 } |