1 /*
 2  * Copyright (c) 2017, 2022, Red Hat, Inc. All rights reserved.
 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  *
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 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHWORKERPOLICY_HPP
26 #define SHARE_GC_SHENANDOAH_SHENANDOAHWORKERPOLICY_HPP
27 
28 #include "memory/allStatic.hpp"
29 
30 class ShenandoahWorkerPolicy : AllStatic {
31 private:
32   static uint _prev_par_marking;
33   static uint _prev_conc_marking;
34   static uint _prev_conc_root_proc;
35   static uint _prev_conc_refs_proc;
36   static uint _prev_conc_evac;
37   static uint _prev_fullgc;
38   static uint _prev_degengc;
39   static uint _prev_conc_update_ref;
40   static uint _prev_par_update_ref;
41   static uint _prev_conc_cleanup;
42   static uint _prev_conc_reset;
43 
44 public:
45   // Calculate the number of workers for initial marking
46   static uint calc_workers_for_init_marking();
47 
48   // Calculate the number of workers for concurrent marking
49   static uint calc_workers_for_conc_marking();
50 
51   // Calculate the number of workers for final marking
52   static uint calc_workers_for_final_marking();
53 
54   // Calculate workers for concurrent root processing
55   static uint calc_workers_for_conc_root_processing();
56 
57   // Calculate workers for concurrent refs processing
58   static uint calc_workers_for_conc_refs_processing();
59 
60   // Calculate workers for concurrent evacuation (concurrent GC)
61   static uint calc_workers_for_conc_evac();
62 
63   // Calculate workers for parallel full gc
64   static uint calc_workers_for_fullgc();
65 
66   // Calculate workers for parallel degenerated gc
67   static uint calc_workers_for_stw_degenerated();
68 
69   // Calculate workers for concurrent reference update
70   static uint calc_workers_for_conc_update_ref();
71 
72   // Calculate workers for parallel/final reference update
73   static uint calc_workers_for_final_update_ref();
74 
75   // Calculate workers for concurrent cleanup
76   static uint calc_workers_for_conc_cleanup();
77 
78   // Calculate workers for concurrent reset
79   static uint calc_workers_for_conc_reset();
80 };
81 
82 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHWORKERPOLICY_HPP