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 *
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 #include "precompiled.hpp"
25 #include "gc/z/zGlobals.hpp"
26 #include "gc/z/zTask.hpp"
27 #include "gc/z/zThread.hpp"
28 #include "gc/z/zWorkers.inline.hpp"
29 #include "runtime/mutexLocker.hpp"
30 #include "runtime/safepoint.hpp"
31
32 class ZWorkersInitializeTask : public ZTask {
33 private:
34 const uint _nworkers;
35 uint _started;
36 Monitor _monitor;
37
38 public:
39 ZWorkersInitializeTask(uint nworkers) :
40 ZTask("ZWorkersInitializeTask"),
41 _nworkers(nworkers),
42 _started(0),
43 _monitor(Monitor::leaf,
44 "ZWorkersInitialize",
52 // Wait for all threads to start
53 MonitorLocker ml(&_monitor, Monitor::_no_safepoint_check_flag);
54 if (++_started == _nworkers) {
55 // All threads started
56 ml.notify_all();
57 } else {
58 while (_started != _nworkers) {
59 ml.wait();
60 }
61 }
62 }
63 };
64
65 ZWorkers::ZWorkers() :
66 _boost(false),
67 _workers("ZWorker",
68 nworkers(),
69 true /* are_GC_task_threads */,
70 true /* are_ConcurrentGC_threads */) {
71
72 log_info(gc, init)("Workers: %u parallel, %u concurrent", nparallel(), nconcurrent());
73
74 // Initialize worker threads
75 _workers.initialize_workers();
76 _workers.update_active_workers(nworkers());
77 if (_workers.active_workers() != nworkers()) {
78 vm_exit_during_initialization("Failed to create ZWorkers");
79 }
80
81 // Execute task to register threads as workers. This also helps
82 // reduce latency in early GC pauses, which otherwise would have
83 // to take on any warmup costs.
84 ZWorkersInitializeTask task(nworkers());
85 run(&task, nworkers());
86 }
87
88 void ZWorkers::set_boost(bool boost) {
89 if (boost) {
90 log_debug(gc)("Boosting workers");
91 }
92
|
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 *
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 #include "precompiled.hpp"
25 #include "gc/shared/gcLogPrecious.hpp"
26 #include "gc/z/zGlobals.hpp"
27 #include "gc/z/zTask.hpp"
28 #include "gc/z/zThread.hpp"
29 #include "gc/z/zWorkers.inline.hpp"
30 #include "runtime/mutexLocker.hpp"
31 #include "runtime/safepoint.hpp"
32
33 class ZWorkersInitializeTask : public ZTask {
34 private:
35 const uint _nworkers;
36 uint _started;
37 Monitor _monitor;
38
39 public:
40 ZWorkersInitializeTask(uint nworkers) :
41 ZTask("ZWorkersInitializeTask"),
42 _nworkers(nworkers),
43 _started(0),
44 _monitor(Monitor::leaf,
45 "ZWorkersInitialize",
53 // Wait for all threads to start
54 MonitorLocker ml(&_monitor, Monitor::_no_safepoint_check_flag);
55 if (++_started == _nworkers) {
56 // All threads started
57 ml.notify_all();
58 } else {
59 while (_started != _nworkers) {
60 ml.wait();
61 }
62 }
63 }
64 };
65
66 ZWorkers::ZWorkers() :
67 _boost(false),
68 _workers("ZWorker",
69 nworkers(),
70 true /* are_GC_task_threads */,
71 true /* are_ConcurrentGC_threads */) {
72
73 log_info_p(gc, init)("Workers: %u parallel, %u concurrent", nparallel(), nconcurrent());
74
75 // Initialize worker threads
76 _workers.initialize_workers();
77 _workers.update_active_workers(nworkers());
78 if (_workers.active_workers() != nworkers()) {
79 vm_exit_during_initialization("Failed to create ZWorkers");
80 }
81
82 // Execute task to register threads as workers. This also helps
83 // reduce latency in early GC pauses, which otherwise would have
84 // to take on any warmup costs.
85 ZWorkersInitializeTask task(nworkers());
86 run(&task, nworkers());
87 }
88
89 void ZWorkers::set_boost(bool boost) {
90 if (boost) {
91 log_debug(gc)("Boosting workers");
92 }
93
|