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 
  25 #ifndef SHARE_VM_GC_SHENANDOAH_SHENANDOAHWORKERPOLICY_HPP
  26 #define SHARE_VM_GC_SHENANDOAH_SHENANDOAHWORKERPOLICY_HPP
  27 
  28 #include "memory/allocation.hpp"
  29 
  30 
  31 class ShenandoahWorkerPolicy : AllStatic {
  32 private:
  33   static uint _prev_par_marking;
  34   static uint _prev_conc_marking;
  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 
  42 public:
  43   // Calculate the number of workers for initial marking
  44   static uint calc_workers_for_init_marking();
  45 
  46   // Calculate the number of workers for concurrent marking
  47   static uint calc_workers_for_conc_marking();
  48 
  49   // Calculate the number of workers for final marking
  50   static uint calc_workers_for_final_marking();
  51 
  52   // Calculate workers for concurrent evacuation (concurrent GC)
  53   static uint calc_workers_for_conc_evac();
  54 
  55   // Calculate workers for parallel full gc
  56   static uint calc_workers_for_fullgc();
  57 
  58   // Calculate workers for parallel degenerated gc
  59   static uint calc_workers_for_stw_degenerated();
  60 
  61   // Calculate workers for concurrent reference update
  62   static uint calc_workers_for_conc_update_ref();
  63 
  64   // Calculate workers for parallel/final reference update
  65   static uint calc_workers_for_final_update_ref();
  66 
  67   // Calculate workers for concurrent precleaning
  68   static uint calc_workers_for_conc_preclean();
  69 
  70   // Calculate workers for concurrent cleanup
  71   static uint calc_workers_for_conc_cleanup();
  72 };
  73 
  74 #endif // SHARE_VM_GC_SHENANDOAH_SHENANDOAHWORKERPOLICY_HPP