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_rs_scanning;
35   static uint _prev_conc_root_proc;
36   static uint _prev_conc_refs_proc;
37   static uint _prev_conc_evac;
38   static uint _prev_fullgc;
39   static uint _prev_degengc;
40   static uint _prev_conc_update_ref;
41   static uint _prev_par_update_ref;
42   static uint _prev_conc_cleanup;
43   static uint _prev_conc_reset;
44 
45 public:
46   // Calculate the number of workers for initial marking
47   static uint calc_workers_for_init_marking();
48 
49   // Calculate the number of workers for concurrent marking
50   static uint calc_workers_for_conc_marking();
51 
52   // Calculate the number of workers for remembered set scanning
53   static uint calc_workers_for_rs_scanning();
54 
55   // Calculate the number of workers for final marking
56   static uint calc_workers_for_final_marking();
57 
58   // Calculate workers for concurrent root processing
59   static uint calc_workers_for_conc_root_processing();
60 
61   // Calculate workers for concurrent refs processing
62   static uint calc_workers_for_conc_refs_processing();
63 
64   // Calculate workers for concurrent evacuation (concurrent GC)
65   static uint calc_workers_for_conc_evac();
66 
67   // Calculate workers for parallel full gc
68   static uint calc_workers_for_fullgc();
69 
70   // Calculate workers for parallel degenerated gc
71   static uint calc_workers_for_stw_degenerated();
72 
73   // Calculate workers for concurrent reference update
74   static uint calc_workers_for_conc_update_ref();
75 
76   // Calculate workers for parallel/final reference update
77   static uint calc_workers_for_final_update_ref();
78 
79   // Calculate workers for concurrent cleanup
80   static uint calc_workers_for_conc_cleanup();
81 
82   // Calculate workers for concurrent reset
83   static uint calc_workers_for_conc_reset();
84 };
85 
86 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHWORKERPOLICY_HPP