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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "gc/g1/concurrentMarkThread.inline.hpp"
27 #include "gc/g1/g1CollectedHeap.inline.hpp"
28 #include "gc/g1/g1CollectorPolicy.hpp"
29 #include "gc/g1/g1Log.hpp"
30 #include "gc/g1/g1MMUTracker.hpp"
31 #include "gc/g1/suspendibleThreadSet.hpp"
32 #include "gc/g1/vm_operations_g1.hpp"
33 #include "gc/shared/gcTrace.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "runtime/vmThread.hpp"
36
37 // ======= Concurrent Mark Thread ========
38
39 // The CM thread is created when the G1 garbage collector is used
40
41 SurrogateLockerThread*
42 ConcurrentMarkThread::_slt = NULL;
43
44 ConcurrentMarkThread::ConcurrentMarkThread(ConcurrentMark* cm) :
45 ConcurrentGCThread(),
46 _cm(cm),
47 _state(Idle),
48 _vtime_accum(0.0),
49 _vtime_mark_accum(0.0) {
50
51 set_name("G1 Main Marker");
52 create_and_start();
68 class CMCleanUp: public VoidClosure {
69 ConcurrentMark* _cm;
70 public:
71
72 CMCleanUp(ConcurrentMark* cm) :
73 _cm(cm) {}
74
75 void do_void(){
76 _cm->cleanup();
77 }
78 };
79
80 // We want to avoid that the logging from the concurrent thread is mixed
81 // with the logging from a STW GC. So, if necessary join the STS to ensure
82 // that the logging is done either before or after the STW logging.
83 void ConcurrentMarkThread::cm_log(bool doit, bool join_sts, const char* fmt, ...) {
84 if (doit) {
85 SuspendibleThreadSetJoiner sts_joiner(join_sts);
86 va_list args;
87 va_start(args, fmt);
88 gclog_or_tty->gclog_stamp(cm()->concurrent_gc_id());
89 gclog_or_tty->vprint_cr(fmt, args);
90 va_end(args);
91 }
92 }
93
94 void ConcurrentMarkThread::run() {
95 initialize_in_thread();
96 _vtime_start = os::elapsedVTime();
97 wait_for_universe_init();
98
99 G1CollectedHeap* g1h = G1CollectedHeap::heap();
100 G1CollectorPolicy* g1_policy = g1h->g1_policy();
101 G1MMUTracker *mmu_tracker = g1_policy->mmu_tracker();
102 Thread *current_thread = Thread::current();
103
104 while (!_should_terminate) {
105 // wait until started is set.
106 sleepBeforeNextCycle();
107 if (_should_terminate) {
108 break;
109 }
110
111 {
112 ResourceMark rm;
113 HandleMark hm;
114 double cycle_start = os::elapsedVTime();
115
116 // We have to ensure that we finish scanning the root regions
117 // before the next GC takes place. To ensure this we have to
118 // make sure that we do not join the STS until the root regions
119 // have been scanned. If we did then it's possible that a
120 // subsequent GC could block us from joining the STS and proceed
121 // without the root regions have been scanned which would be a
122 // correctness issue.
123
124 if (!cm()->has_aborted()) {
125 _cm->scanRootRegions();
126 }
127
128 double mark_start_sec = os::elapsedTime();
129 cm_log(G1Log::fine(), true, "[GC concurrent-mark-start]");
130
|
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "gc/g1/concurrentMarkThread.inline.hpp"
27 #include "gc/g1/g1CollectedHeap.inline.hpp"
28 #include "gc/g1/g1CollectorPolicy.hpp"
29 #include "gc/g1/g1Log.hpp"
30 #include "gc/g1/g1MMUTracker.hpp"
31 #include "gc/g1/suspendibleThreadSet.hpp"
32 #include "gc/g1/vm_operations_g1.hpp"
33 #include "gc/shared/gcId.hpp"
34 #include "gc/shared/gcTrace.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "runtime/vmThread.hpp"
37
38 // ======= Concurrent Mark Thread ========
39
40 // The CM thread is created when the G1 garbage collector is used
41
42 SurrogateLockerThread*
43 ConcurrentMarkThread::_slt = NULL;
44
45 ConcurrentMarkThread::ConcurrentMarkThread(ConcurrentMark* cm) :
46 ConcurrentGCThread(),
47 _cm(cm),
48 _state(Idle),
49 _vtime_accum(0.0),
50 _vtime_mark_accum(0.0) {
51
52 set_name("G1 Main Marker");
53 create_and_start();
69 class CMCleanUp: public VoidClosure {
70 ConcurrentMark* _cm;
71 public:
72
73 CMCleanUp(ConcurrentMark* cm) :
74 _cm(cm) {}
75
76 void do_void(){
77 _cm->cleanup();
78 }
79 };
80
81 // We want to avoid that the logging from the concurrent thread is mixed
82 // with the logging from a STW GC. So, if necessary join the STS to ensure
83 // that the logging is done either before or after the STW logging.
84 void ConcurrentMarkThread::cm_log(bool doit, bool join_sts, const char* fmt, ...) {
85 if (doit) {
86 SuspendibleThreadSetJoiner sts_joiner(join_sts);
87 va_list args;
88 va_start(args, fmt);
89 gclog_or_tty->gclog_stamp();
90 gclog_or_tty->vprint_cr(fmt, args);
91 va_end(args);
92 }
93 }
94
95 void ConcurrentMarkThread::run() {
96 initialize_in_thread();
97 _vtime_start = os::elapsedVTime();
98 wait_for_universe_init();
99
100 G1CollectedHeap* g1h = G1CollectedHeap::heap();
101 G1CollectorPolicy* g1_policy = g1h->g1_policy();
102 G1MMUTracker *mmu_tracker = g1_policy->mmu_tracker();
103 Thread *current_thread = Thread::current();
104
105 while (!_should_terminate) {
106 // wait until started is set.
107 sleepBeforeNextCycle();
108 if (_should_terminate) {
109 break;
110 }
111
112 GCIdMark gc_id_mark;
113 {
114 ResourceMark rm;
115 HandleMark hm;
116 double cycle_start = os::elapsedVTime();
117
118 // We have to ensure that we finish scanning the root regions
119 // before the next GC takes place. To ensure this we have to
120 // make sure that we do not join the STS until the root regions
121 // have been scanned. If we did then it's possible that a
122 // subsequent GC could block us from joining the STS and proceed
123 // without the root regions have been scanned which would be a
124 // correctness issue.
125
126 if (!cm()->has_aborted()) {
127 _cm->scanRootRegions();
128 }
129
130 double mark_start_sec = os::elapsedTime();
131 cm_log(G1Log::fine(), true, "[GC concurrent-mark-start]");
132
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