1 /*
2 * Copyright (c) 2017, Red Hat, Inc. and/or its affiliates.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation.
7 *
8 * This code is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
11 * version 2 for more details (a copy is included in the LICENSE file that
12 * accompanied this code).
13 *
14 * You should have received a copy of the GNU General Public License version
15 * 2 along with this work; if not, write to the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
19 * or visit www.oracle.com if you need additional information or have any
20 * questions.
21 *
22 */
23
24 #include "precompiled.hpp"
25
26 #include "gc/shared/adaptiveSizePolicy.hpp"
27 #include "gc/shenandoah/shenandoahWorkerPolicy.hpp"
28 #include "runtime/thread.hpp"
29
30 uint ShenandoahWorkerPolicy::_prev_par_marking = 0;
31 uint ShenandoahWorkerPolicy::_prev_conc_marking = 0;
32 uint ShenandoahWorkerPolicy::_prev_conc_evac = 0;
33 uint ShenandoahWorkerPolicy::_prev_fullgc = 0;
34 uint ShenandoahWorkerPolicy::_prev_degengc = 0;
35 uint ShenandoahWorkerPolicy::_prev_stw_traversal = 0;
36 uint ShenandoahWorkerPolicy::_prev_conc_traversal = 0;
37 uint ShenandoahWorkerPolicy::_prev_conc_update_ref = 0;
38 uint ShenandoahWorkerPolicy::_prev_par_update_ref = 0;
39 uint ShenandoahWorkerPolicy::_prev_conc_cleanup = 0;
40
41 uint ShenandoahWorkerPolicy::calc_workers_for_init_marking() {
42 uint active_workers = (_prev_par_marking == 0) ? ParallelGCThreads : _prev_par_marking;
43
44 _prev_par_marking =
45 AdaptiveSizePolicy::calc_active_workers(ParallelGCThreads,
46 active_workers,
47 Threads::number_of_non_daemon_threads());
48 return _prev_par_marking;
49 }
50
51 uint ShenandoahWorkerPolicy::calc_workers_for_conc_marking() {
52 uint active_workers = (_prev_conc_marking == 0) ? ConcGCThreads : _prev_conc_marking;
53 _prev_conc_marking =
54 AdaptiveSizePolicy::calc_active_conc_workers(ConcGCThreads,
55 active_workers,
56 Threads::number_of_non_daemon_threads());
57 return _prev_conc_marking;
58 }
59
60 // Reuse the calculation result from init marking
61 uint ShenandoahWorkerPolicy::calc_workers_for_final_marking() {
62 return _prev_par_marking;
63 }
64
65 // Calculate workers for concurrent evacuation (concurrent GC)
66 uint ShenandoahWorkerPolicy::calc_workers_for_conc_evac() {
67 uint active_workers = (_prev_conc_evac == 0) ? ConcGCThreads : _prev_conc_evac;
68 _prev_conc_evac =
69 AdaptiveSizePolicy::calc_active_workers(ConcGCThreads,
70 active_workers,
71 Threads::number_of_non_daemon_threads());
72 return _prev_conc_evac;
73 }
74
75 // Calculate workers for parallel fullgc
76 uint ShenandoahWorkerPolicy::calc_workers_for_fullgc() {
77 uint active_workers = (_prev_fullgc == 0) ? ParallelGCThreads : _prev_fullgc;
78 _prev_fullgc =
79 AdaptiveSizePolicy::calc_active_workers(ParallelGCThreads,
80 active_workers,
81 Threads::number_of_non_daemon_threads());
82 return _prev_fullgc;
83 }
84
85 // Calculate workers for parallel degenerated gc
86 uint ShenandoahWorkerPolicy::calc_workers_for_stw_degenerated() {
87 uint active_workers = (_prev_degengc == 0) ? ParallelGCThreads : _prev_degengc;
88 _prev_degengc =
89 AdaptiveSizePolicy::calc_active_workers(ParallelGCThreads,
90 active_workers,
91 Threads::number_of_non_daemon_threads());
92 return _prev_degengc;
93 }
94
95 // Calculate workers for Stop-the-world traversal GC
96 uint ShenandoahWorkerPolicy::calc_workers_for_stw_traversal() {
97 uint active_workers = (_prev_stw_traversal == 0) ? ParallelGCThreads : _prev_stw_traversal;
98 _prev_stw_traversal =
99 AdaptiveSizePolicy::calc_active_workers(ParallelGCThreads,
100 active_workers,
101 Threads::number_of_non_daemon_threads());
102 return _prev_stw_traversal;
103 }
104
105 // Calculate workers for concurent traversal GC
106 uint ShenandoahWorkerPolicy::calc_workers_for_conc_traversal() {
107 uint active_workers = (_prev_conc_traversal == 0) ? ConcGCThreads : _prev_conc_traversal;
108 _prev_conc_traversal =
109 AdaptiveSizePolicy::calc_active_conc_workers(ConcGCThreads,
110 active_workers,
111 Threads::number_of_non_daemon_threads());
112 return _prev_conc_traversal;
113 }
114
115 // Calculate workers for concurrent reference update
116 uint ShenandoahWorkerPolicy::calc_workers_for_conc_update_ref() {
117 uint active_workers = (_prev_conc_update_ref == 0) ? ConcGCThreads : _prev_conc_update_ref;
118 _prev_conc_update_ref =
119 AdaptiveSizePolicy::calc_active_workers(ConcGCThreads,
120 active_workers,
121 Threads::number_of_non_daemon_threads());
122 return _prev_conc_update_ref;
123 }
124
125 // Calculate workers for parallel reference update
126 uint ShenandoahWorkerPolicy::calc_workers_for_final_update_ref() {
127 uint active_workers = (_prev_par_update_ref == 0) ? ParallelGCThreads : _prev_par_update_ref;
128 _prev_par_update_ref =
129 AdaptiveSizePolicy::calc_active_workers(ParallelGCThreads,
130 active_workers,
131 Threads::number_of_non_daemon_threads());
132 return _prev_par_update_ref;
133 }
134
135 uint ShenandoahWorkerPolicy::calc_workers_for_conc_preclean() {
136 return _prev_conc_marking;
137 }
138
139 uint ShenandoahWorkerPolicy::calc_workers_for_conc_cleanup() {
140 uint active_workers = (_prev_conc_cleanup == 0) ? ConcGCThreads : _prev_conc_cleanup;
141 _prev_conc_cleanup =
142 AdaptiveSizePolicy::calc_active_workers(ConcGCThreads,
143 active_workers,
144 Threads::number_of_non_daemon_threads());
145 return _prev_conc_cleanup;
146 }