1 /*
   2  * Copyright (c) 2017, 2019, 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/allocation.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_evac;
  36   static uint _prev_fullgc;
  37   static uint _prev_degengc;
  38   static uint _prev_conc_update_ref;
  39   static uint _prev_par_update_ref;
  40   static uint _prev_conc_cleanup;
  41   static uint _prev_conc_reset;
  42 
  43 public:
  44   // Calculate the number of workers for initial marking
  45   static uint calc_workers_for_init_marking();
  46 
  47   // Calculate the number of workers for concurrent marking
  48   static uint calc_workers_for_conc_marking();
  49 
  50   // Calculate the number of workers for final marking
  51   static uint calc_workers_for_final_marking();
  52 
  53   // Calculate workers for concurrent root processing
  54   static uint calc_workers_for_conc_root_processing();
  55 
  56   // Calculate workers for concurrent evacuation (concurrent GC)
  57   static uint calc_workers_for_conc_evac();
  58 
  59   // Calculate workers for parallel full gc
  60   static uint calc_workers_for_fullgc();
  61 
  62   // Calculate workers for parallel degenerated gc
  63   static uint calc_workers_for_stw_degenerated();
  64 
  65   // Calculate workers for concurrent reference update
  66   static uint calc_workers_for_conc_update_ref();
  67 
  68   // Calculate workers for parallel/final reference update
  69   static uint calc_workers_for_final_update_ref();
  70 
  71   // Calculate workers for concurrent precleaning
  72   static uint calc_workers_for_conc_preclean();
  73 
  74   // Calculate workers for concurrent cleanup
  75   static uint calc_workers_for_conc_cleanup();
  76 
  77   // Calculate workers for concurrent reset
  78   static uint calc_workers_for_conc_reset();
  79 };
  80 
  81 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHWORKERPOLICY_HPP