1 /*

     2  * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved.

     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 #ifndef SHARE_VM_GC_SHENANDOAH_SHENANDOAHWORKERPOLICY_HPP

    25 #define SHARE_VM_GC_SHENANDOAH_SHENANDOAHWORKERPOLICY_HPP

    26 

    27 #include "memory/allocation.hpp"

    28 

    29 class ShenandoahWorkerPolicy : AllStatic {

    30 private:

    31   static uint _prev_par_marking;

    32   static uint _prev_conc_marking;

    33   static uint _prev_conc_evac;

    34   static uint _prev_fullgc;

    35   static uint _prev_degengc;

    36   static uint _prev_stw_traversal;

    37   static uint _prev_conc_traversal;

    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 evacuation (concurrent GC)

    54   static uint calc_workers_for_conc_evac();

    55 

    56   // Calculate workers for parallel full gc

    57   static uint calc_workers_for_fullgc();

    58 

    59   // Calculate workers for parallel degenerated gc

    60   static uint calc_workers_for_stw_degenerated();

    61 

    62   // Calculate workers for Stop-the-world traversal GC

    63   static uint calc_workers_for_stw_traversal();

    64 

    65   // Calculate workers for concurrent traversal GC

    66   static uint calc_workers_for_conc_traversal();

    67 

    68   // Calculate workers for concurrent reference update

    69   static uint calc_workers_for_conc_update_ref();

    70 

    71   // Calculate workers for parallel/final reference update

    72   static uint calc_workers_for_final_update_ref();

    73 

    74   // Calculate workers for concurrent precleaning

    75   static uint calc_workers_for_conc_preclean();

    76 

    77   // Calculate workers for concurrent cleanup

    78   static uint calc_workers_for_conc_cleanup();

    79 

    80   // Calculate workers for concurrent reset

    81   static uint calc_workers_for_conc_reset();

    82 };

    83 

    84 #endif // SHARE_VM_GC_SHENANDOAH_SHENANDOAHWORKERPOLICY_HPP