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