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 #include "precompiled.hpp" 25 26 #include "gc_implementation/shared/adaptiveSizePolicy.hpp" 27 #include "gc_implementation/shenandoah/shenandoahWorkerPolicy.hpp" 28 #include "runtime/thread.hpp" 29 30 uint ShenandoahWorkerPolicy::_prev_par_marking = 0; 31 uint ShenandoahWorkerPolicy::_prev_conc_marking = 0; 32 uint ShenandoahWorkerPolicy::_prev_conc_evac = 0; 33 uint ShenandoahWorkerPolicy::_prev_fullgc = 0; 34 uint ShenandoahWorkerPolicy::_prev_degengc = 0; 35 uint ShenandoahWorkerPolicy::_prev_conc_update_ref = 0; 36 uint ShenandoahWorkerPolicy::_prev_par_update_ref = 0; 37 uint ShenandoahWorkerPolicy::_prev_conc_cleanup = 0; 38 39 uint ShenandoahWorkerPolicy::calc_workers_for_init_marking() { 40 uint active_workers = (_prev_par_marking == 0) ? ParallelGCThreads : _prev_par_marking; 41 42 _prev_par_marking = 43 AdaptiveSizePolicy::calc_active_workers(ParallelGCThreads, 44 active_workers, 45 Threads::number_of_non_daemon_threads()); 46 return _prev_par_marking; 47 } 48 49 uint ShenandoahWorkerPolicy::calc_workers_for_conc_marking() { 50 uint active_workers = (_prev_conc_marking == 0) ? ConcGCThreads : _prev_conc_marking; 51 _prev_conc_marking = 52 AdaptiveSizePolicy::calc_active_conc_workers(ConcGCThreads, 53 active_workers, 54 Threads::number_of_non_daemon_threads()); 55 return _prev_conc_marking; 56 } 57 58 // Reuse the calculation result from init marking 59 uint ShenandoahWorkerPolicy::calc_workers_for_final_marking() { 60 return _prev_par_marking; 61 } 62 63 // Calculate workers for concurrent evacuation (concurrent GC) 64 uint ShenandoahWorkerPolicy::calc_workers_for_conc_evac() { 65 uint active_workers = (_prev_conc_evac == 0) ? ConcGCThreads : _prev_conc_evac; 66 _prev_conc_evac = 67 AdaptiveSizePolicy::calc_active_conc_workers(ConcGCThreads, 68 active_workers, 69 Threads::number_of_non_daemon_threads()); 70 return _prev_conc_evac; 71 } 72 73 // Calculate workers for parallel fullgc 74 uint ShenandoahWorkerPolicy::calc_workers_for_fullgc() { 75 uint active_workers = (_prev_fullgc == 0) ? ParallelGCThreads : _prev_fullgc; 76 _prev_fullgc = 77 AdaptiveSizePolicy::calc_active_workers(ParallelGCThreads, 78 active_workers, 79 Threads::number_of_non_daemon_threads()); 80 return _prev_fullgc; 81 } 82 83 // Calculate workers for concurrent reference update 84 uint ShenandoahWorkerPolicy::calc_workers_for_conc_update_ref() { 85 uint active_workers = (_prev_conc_update_ref == 0) ? ConcGCThreads : _prev_conc_update_ref; 86 _prev_conc_update_ref = 87 AdaptiveSizePolicy::calc_active_conc_workers(ConcGCThreads, 88 active_workers, 89 Threads::number_of_non_daemon_threads()); 90 return _prev_conc_update_ref; 91 } 92 93 // Calculate workers for parallel reference update 94 uint ShenandoahWorkerPolicy::calc_workers_for_final_update_ref() { 95 uint active_workers = (_prev_par_update_ref == 0) ? ParallelGCThreads : _prev_par_update_ref; 96 _prev_par_update_ref = 97 AdaptiveSizePolicy::calc_active_workers(ParallelGCThreads, 98 active_workers, 99 Threads::number_of_non_daemon_threads()); 100 return _prev_par_update_ref; 101 } 102 103 // Calculate workers for parallel degenerated gc 104 uint ShenandoahWorkerPolicy::calc_workers_for_stw_degenerated() { 105 uint active_workers = (_prev_degengc == 0) ? ParallelGCThreads : _prev_degengc; 106 _prev_degengc = 107 AdaptiveSizePolicy::calc_active_workers(ParallelGCThreads, 108 active_workers, 109 Threads::number_of_non_daemon_threads()); 110 return _prev_degengc; 111 } 112 113 uint ShenandoahWorkerPolicy::calc_workers_for_conc_preclean() { 114 return _prev_conc_marking; 115 } 116 117 uint ShenandoahWorkerPolicy::calc_workers_for_conc_cleanup() { 118 uint active_workers = (_prev_conc_cleanup == 0) ? ConcGCThreads : _prev_conc_cleanup; 119 _prev_conc_cleanup = 120 AdaptiveSizePolicy::calc_active_conc_workers(ConcGCThreads, 121 active_workers, 122 Threads::number_of_non_daemon_threads()); 123 return _prev_conc_cleanup; 124 }