Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/concurrentMarkThread.cpp @ 8081:579f6adb7f51
8003539: Minimal VM don't react to -Dcom.sun.management and -XX:+ManagementServer
Summary: A warning message should be displayed if these options are used with the Minimal VM.
Reviewed-by: dholmes, dsamersoff
author | jprovino |
---|---|
date | Tue, 05 Feb 2013 13:32:34 -0500 |
parents | d275c3dc73e6 |
children | 96c885895d22 |
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 char verbose_str[128]; | |
97 | |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
98 // 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
|
99 // 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
|
100 // 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
|
101 // 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
|
102 // 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
|
103 // 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
|
104 // correctness issue. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
105 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
106 double scan_start = os::elapsedTime(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
107 if (!cm()->has_aborted()) { |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5963
diff
changeset
|
108 if (G1Log::fine()) { |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
109 gclog_or_tty->date_stamp(PrintGCDateStamps); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
110 gclog_or_tty->stamp(PrintGCTimeStamps); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
111 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
|
112 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
113 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
114 _cm->scanRootRegions(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
115 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
116 double scan_end = os::elapsedTime(); |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5963
diff
changeset
|
117 if (G1Log::fine()) { |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
118 gclog_or_tty->date_stamp(PrintGCDateStamps); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
119 gclog_or_tty->stamp(PrintGCTimeStamps); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
120 gclog_or_tty->print_cr("[GC concurrent-root-region-scan-end, %1.7lf]", |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
121 scan_end - scan_start); |
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 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
125 double mark_start_sec = os::elapsedTime(); |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5963
diff
changeset
|
126 if (G1Log::fine()) { |
342 | 127 gclog_or_tty->date_stamp(PrintGCDateStamps); |
128 gclog_or_tty->stamp(PrintGCTimeStamps); | |
619
7ea5ca260b28
6814467: G1: small fixes related to concurrent marking verboseness
tonyp
parents:
342
diff
changeset
|
129 gclog_or_tty->print_cr("[GC concurrent-mark-start]"); |
342 | 130 } |
131 | |
132 int iter = 0; | |
133 do { | |
134 iter++; | |
135 if (!cm()->has_aborted()) { | |
136 _cm->markFromRoots(); | |
137 } | |
138 | |
139 double mark_end_time = os::elapsedVTime(); | |
140 double mark_end_sec = os::elapsedTime(); | |
141 _vtime_mark_accum += (mark_end_time - cycle_start); | |
142 if (!cm()->has_aborted()) { | |
143 if (g1_policy->adaptive_young_list_length()) { | |
144 double now = os::elapsedTime(); | |
145 double remark_prediction_ms = g1_policy->predict_remark_time_ms(); | |
146 jlong sleep_time_ms = mmu_tracker->when_ms(now, remark_prediction_ms); | |
147 os::sleep(current_thread, sleep_time_ms, false); | |
148 } | |
149 | |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5963
diff
changeset
|
150 if (G1Log::fine()) { |
342 | 151 gclog_or_tty->date_stamp(PrintGCDateStamps); |
152 gclog_or_tty->stamp(PrintGCTimeStamps); | |
153 gclog_or_tty->print_cr("[GC concurrent-mark-end, %1.7lf sec]", | |
154 mark_end_sec - mark_start_sec); | |
155 } | |
156 | |
157 CMCheckpointRootsFinalClosure final_cl(_cm); | |
158 sprintf(verbose_str, "GC remark"); | |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4837
diff
changeset
|
159 VM_CGC_Operation op(&final_cl, verbose_str, true /* needs_pll */); |
342 | 160 VMThread::execute(&op); |
161 } | |
162 if (cm()->restart_for_overflow()) { | |
7450
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
6120
diff
changeset
|
163 if (G1TraceMarkStackOverflow) { |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
6120
diff
changeset
|
164 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
|
165 "in remark (restart #%d).", iter); |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
6120
diff
changeset
|
166 } |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5963
diff
changeset
|
167 if (G1Log::fine()) { |
342 | 168 gclog_or_tty->date_stamp(PrintGCDateStamps); |
169 gclog_or_tty->stamp(PrintGCTimeStamps); | |
170 gclog_or_tty->print_cr("[GC concurrent-mark-restart-for-overflow]"); | |
171 } | |
172 } | |
173 } 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
|
174 |
342 | 175 double end_time = os::elapsedVTime(); |
176 // Update the total virtual time before doing this, since it will try | |
177 // to measure it to get the vtime for this marking. We purposely | |
178 // neglect the presumably-short "completeCleanup" phase here. | |
179 _vtime_accum = (end_time - _vtime_start); | |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4096
diff
changeset
|
180 |
342 | 181 if (!cm()->has_aborted()) { |
182 if (g1_policy->adaptive_young_list_length()) { | |
183 double now = os::elapsedTime(); | |
184 double cleanup_prediction_ms = g1_policy->predict_cleanup_time_ms(); | |
185 jlong sleep_time_ms = mmu_tracker->when_ms(now, cleanup_prediction_ms); | |
186 os::sleep(current_thread, sleep_time_ms, false); | |
187 } | |
188 | |
189 CMCleanUp cl_cl(_cm); | |
190 sprintf(verbose_str, "GC cleanup"); | |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4837
diff
changeset
|
191 VM_CGC_Operation op(&cl_cl, verbose_str, false /* needs_pll */); |
342 | 192 VMThread::execute(&op); |
193 } else { | |
4096
00dd86e542eb
7114303: G1: assert(_g1->mark_in_progress()) failed: shouldn't be here otherwise
johnc
parents:
4022
diff
changeset
|
194 // 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
|
195 // is already underway. |
00dd86e542eb
7114303: G1: assert(_g1->mark_in_progress()) failed: shouldn't be here otherwise
johnc
parents:
4022
diff
changeset
|
196 _sts.join(); |
2152 | 197 g1h->set_marking_complete(); |
4096
00dd86e542eb
7114303: G1: assert(_g1->mark_in_progress()) failed: shouldn't be here otherwise
johnc
parents:
4022
diff
changeset
|
198 _sts.leave(); |
342 | 199 } |
200 | |
2152 | 201 // Check if cleanup set the free_regions_coming flag. If it |
202 // hasn't, we can just skip the next step. | |
203 if (g1h->free_regions_coming()) { | |
204 // The following will finish freeing up any regions that we | |
205 // found to be empty during cleanup. We'll do this part | |
206 // without joining the suspendible set. If an evacuation pause | |
2361 | 207 // takes place, then we would carry on freeing regions in |
2152 | 208 // case they are needed by the pause. If a Full GC takes |
2361 | 209 // place, it would wait for us to process the regions |
2152 | 210 // reclaimed by cleanup. |
211 | |
342 | 212 double cleanup_start_sec = os::elapsedTime(); |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5963
diff
changeset
|
213 if (G1Log::fine()) { |
342 | 214 gclog_or_tty->date_stamp(PrintGCDateStamps); |
215 gclog_or_tty->stamp(PrintGCTimeStamps); | |
216 gclog_or_tty->print_cr("[GC concurrent-cleanup-start]"); | |
217 } | |
218 | |
4012
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
219 // Now do the concurrent cleanup operation. |
342 | 220 _cm->completeCleanup(); |
4012
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
221 |
2185 | 222 // 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
|
223 // 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
|
224 // (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
|
225 // interval between finishing the cleanup pause and clearing |
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
226 // 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
|
227 // 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
|
228 // 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
|
229 // 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
|
230 // the GC workers finishing. |
2185 | 231 g1h->reset_free_regions_coming(); |
232 | |
2152 | 233 double cleanup_end_sec = os::elapsedTime(); |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5963
diff
changeset
|
234 if (G1Log::fine()) { |
2152 | 235 gclog_or_tty->date_stamp(PrintGCDateStamps); |
236 gclog_or_tty->stamp(PrintGCTimeStamps); | |
237 gclog_or_tty->print_cr("[GC concurrent-cleanup-end, %1.7lf]", | |
238 cleanup_end_sec - cleanup_start_sec); | |
342 | 239 } |
240 } | |
2152 | 241 guarantee(cm()->cleanup_list_is_empty(), |
242 "at this point there should be no regions on the cleanup list"); | |
342 | 243 |
4012
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
244 // 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
|
245 // 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
|
246 // 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
|
247 // abort() on concurrent mark after |
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
248 // record_concurrent_mark_cleanup_completed(), since abort() is |
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
249 // 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
|
250 // end up calling record_concurrent_mark_cleanup_completed() |
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
251 // 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
|
252 // 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
|
253 // 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
|
254 // are two scenarios: |
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
255 // |
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
256 // 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
|
257 // 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
|
258 // 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
|
259 // will complete before abort() is called. |
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
260 // |
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
261 // 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
|
262 // 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
|
263 // 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
|
264 // true to prevent us from calling |
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
265 // 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
|
266 // 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
|
267 // already reset). |
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
268 _sts.join(); |
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
269 if (!cm()->has_aborted()) { |
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
270 g1_policy->record_concurrent_mark_cleanup_completed(); |
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
271 } |
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
272 _sts.leave(); |
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
273 |
342 | 274 if (cm()->has_aborted()) { |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5963
diff
changeset
|
275 if (G1Log::fine()) { |
342 | 276 gclog_or_tty->date_stamp(PrintGCDateStamps); |
277 gclog_or_tty->stamp(PrintGCTimeStamps); | |
278 gclog_or_tty->print_cr("[GC concurrent-mark-abort]"); | |
279 } | |
280 } | |
281 | |
4012
ec4b032a4977
7098085: G1: partially-young GCs not initiated under certain circumstances
tonyp
parents:
3867
diff
changeset
|
282 // We now want to allow clearing of the marking bitmap to be |
342 | 283 // suspended by a collection pause. |
284 _sts.join(); | |
285 _cm->clearNextBitmap(); | |
286 _sts.leave(); | |
287 } | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1552
diff
changeset
|
288 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1552
diff
changeset
|
289 // Update the number of full collections that have been |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1552
diff
changeset
|
290 // 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
|
291 // 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
|
292 // called System.gc() with +ExplicitGCInvokesConcurrent). |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1972
diff
changeset
|
293 _sts.join(); |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6007
diff
changeset
|
294 g1h->increment_old_marking_cycles_completed(true /* concurrent */); |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1972
diff
changeset
|
295 _sts.leave(); |
342 | 296 } |
297 assert(_should_terminate, "just checking"); | |
298 | |
299 terminate(); | |
300 } | |
301 | |
302 | |
303 void ConcurrentMarkThread::yield() { | |
304 _sts.yield("Concurrent Mark"); | |
305 } | |
306 | |
307 void ConcurrentMarkThread::stop() { | |
308 // it is ok to take late safepoints here, if needed | |
309 MutexLockerEx mu(Terminator_lock); | |
310 _should_terminate = true; | |
311 while (!_has_terminated) { | |
312 Terminator_lock->wait(); | |
313 } | |
314 } | |
315 | |
1019 | 316 void ConcurrentMarkThread::print() const { |
317 print_on(tty); | |
318 } | |
319 | |
320 void ConcurrentMarkThread::print_on(outputStream* st) const { | |
321 st->print("\"G1 Main Concurrent Mark GC Thread\" "); | |
322 Thread::print_on(st); | |
323 st->cr(); | |
342 | 324 } |
325 | |
326 void ConcurrentMarkThread::sleepBeforeNextCycle() { | |
327 // We join here because we don't want to do the "shouldConcurrentMark()" | |
328 // below while the world is otherwise stopped. | |
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1656
diff
changeset
|
329 assert(!in_progress(), "should have been cleared"); |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1656
diff
changeset
|
330 |
342 | 331 MutexLockerEx x(CGC_lock, Mutex::_no_safepoint_check_flag); |
332 while (!started()) { | |
333 CGC_lock->wait(Mutex::_no_safepoint_check_flag); | |
334 } | |
335 set_in_progress(); | |
336 clear_started(); | |
337 } | |
338 | |
4022
db89aa49298f
7099824: G1: we should take the pending list lock before doing the remark pause
johnc
parents:
4012
diff
changeset
|
339 // 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
|
340 // 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
|
341 // 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
|
342 // 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
|
343 // XXX Consider changing this in the future to allow the CM thread |
342 | 344 // itself to create this thread? |
345 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
|
346 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
|
347 assert(THREAD->is_Java_thread(), "must be a Java thread"); |
342 | 348 assert(_slt == NULL, "SLT already created"); |
349 _slt = SurrogateLockerThread::make(THREAD); | |
350 } |