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_implementation/shared/adaptiveSizePolicy.hpp"
27 #include "gc_implementation/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_partial = 0;
36 uint ShenandoahWorkerPolicy::_prev_conc_update_ref = 0;
37 uint ShenandoahWorkerPolicy::_prev_par_update_ref = 0;
38 uint ShenandoahWorkerPolicy::_prev_conc_cleanup = 0;
39
40 uint ShenandoahWorkerPolicy::calc_workers_for_init_marking() {
41 uint active_workers = (_prev_par_marking == 0) ? ParallelGCThreads : _prev_par_marking;
42
43 _prev_par_marking =
44 AdaptiveSizePolicy::calc_active_workers(ParallelGCThreads,
45 active_workers,
46 Threads::number_of_non_daemon_threads());
47 return _prev_par_marking;
48 }
49
50 uint ShenandoahWorkerPolicy::calc_workers_for_conc_marking() {
51 uint active_workers = (_prev_conc_marking == 0) ? ConcGCThreads : _prev_conc_marking;
52 _prev_conc_marking =
53 AdaptiveSizePolicy::calc_active_conc_workers(ConcGCThreads,
54 active_workers,
55 Threads::number_of_non_daemon_threads());
56 return _prev_conc_marking;
57 }
58
59 // Reuse the calculation result from init marking
60 uint ShenandoahWorkerPolicy::calc_workers_for_final_marking() {
61 return _prev_par_marking;
62 }
63
64 // Calculate workers for concurrent evacuation (concurrent GC)
65 uint ShenandoahWorkerPolicy::calc_workers_for_conc_evac() {
66 uint active_workers = (_prev_conc_evac == 0) ? ConcGCThreads : _prev_conc_evac;
67 _prev_conc_evac =
68 AdaptiveSizePolicy::calc_active_workers(ConcGCThreads,
69 active_workers,
70 Threads::number_of_non_daemon_threads());
71 return _prev_conc_evac;
72 }
73
74 // Calculate workers for parallel fullgc
75 uint ShenandoahWorkerPolicy::calc_workers_for_fullgc() {
76 uint active_workers = (_prev_fullgc == 0) ? ParallelGCThreads : _prev_fullgc;
77 _prev_fullgc =
78 AdaptiveSizePolicy::calc_active_workers(ParallelGCThreads,
79 active_workers,
80 Threads::number_of_non_daemon_threads());
81 return _prev_fullgc;
82 }
83
84 // Calculate workers for Stop-the-world partial GC
85 uint ShenandoahWorkerPolicy::calc_workers_for_stw_partial() {
86 uint active_workers = (_prev_stw_partial == 0) ? ParallelGCThreads : _prev_stw_partial;
87 _prev_stw_partial =
88 AdaptiveSizePolicy::calc_active_workers(ParallelGCThreads,
89 active_workers,
90 Threads::number_of_non_daemon_threads());
91 return _prev_stw_partial;
92 }
93
94 // Calculate workers for concurrent reference update
95 uint ShenandoahWorkerPolicy::calc_workers_for_conc_update_ref() {
96 uint active_workers = (_prev_conc_update_ref == 0) ? ConcGCThreads : _prev_conc_update_ref;
97 _prev_conc_update_ref =
98 AdaptiveSizePolicy::calc_active_workers(ConcGCThreads,
99 active_workers,
100 Threads::number_of_non_daemon_threads());
101 return _prev_conc_update_ref;
102 }
103
104 // Calculate workers for parallel reference update
105 uint ShenandoahWorkerPolicy::calc_workers_for_final_update_ref() {
106 uint active_workers = (_prev_par_update_ref == 0) ? ParallelGCThreads : _prev_par_update_ref;
107 _prev_par_update_ref =
108 AdaptiveSizePolicy::calc_active_workers(ParallelGCThreads,
109 active_workers,
110 Threads::number_of_non_daemon_threads());
111 return _prev_par_update_ref;
112 }
113
114 // Calculate workers for parallel degenerated gc
115 uint ShenandoahWorkerPolicy::calc_workers_for_stw_degenerated() {
116 uint active_workers = (_prev_degengc == 0) ? ParallelGCThreads : _prev_degengc;
117 _prev_degengc =
118 AdaptiveSizePolicy::calc_active_workers(ParallelGCThreads,
119 active_workers,
120 Threads::number_of_non_daemon_threads());
121 return _prev_degengc;
122 }
123
124 uint ShenandoahWorkerPolicy::calc_workers_for_conc_preclean() {
125 return _prev_conc_marking;
126 }
127
128 uint ShenandoahWorkerPolicy::calc_workers_for_conc_cleanup() {
129 uint active_workers = (_prev_conc_cleanup == 0) ? ConcGCThreads : _prev_conc_cleanup;
130 _prev_conc_cleanup =
131 AdaptiveSizePolicy::calc_active_workers(ConcGCThreads,
132 active_workers,
133 Threads::number_of_non_daemon_threads());
134 return _prev_conc_cleanup;
135 }