| /* |
| * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| |
| #include "gc/shared/adaptiveSizePolicy.hpp" |
| #include "gc/shenandoah/shenandoahWorkerPolicy.hpp" |
| #include "runtime/thread.hpp" |
| |
| uint ShenandoahWorkerPolicy::_prev_par_marking = 0; |
| uint ShenandoahWorkerPolicy::_prev_conc_marking = 0; |
| uint ShenandoahWorkerPolicy::_prev_conc_evac = 0; |
| uint ShenandoahWorkerPolicy::_prev_fullgc = 0; |
| uint ShenandoahWorkerPolicy::_prev_degengc = 0; |
| uint ShenandoahWorkerPolicy::_prev_conc_update_ref = 0; |
| uint ShenandoahWorkerPolicy::_prev_par_update_ref = 0; |
| uint ShenandoahWorkerPolicy::_prev_conc_cleanup = 0; |
| uint ShenandoahWorkerPolicy::_prev_conc_reset = 0; |
| |
| uint ShenandoahWorkerPolicy::calc_workers_for_init_marking() { |
| uint active_workers = (_prev_par_marking == 0) ? ParallelGCThreads : _prev_par_marking; |
| |
| _prev_par_marking = |
| AdaptiveSizePolicy::calc_active_workers(ParallelGCThreads, |
| active_workers, |
| Threads::number_of_non_daemon_threads()); |
| return _prev_par_marking; |
| } |
| |
| uint ShenandoahWorkerPolicy::calc_workers_for_conc_marking() { |
| uint active_workers = (_prev_conc_marking == 0) ? ConcGCThreads : _prev_conc_marking; |
| _prev_conc_marking = |
| AdaptiveSizePolicy::calc_active_conc_workers(ConcGCThreads, |
| active_workers, |
| Threads::number_of_non_daemon_threads()); |
| return _prev_conc_marking; |
| } |
| |
| // Reuse the calculation result from init marking |
| uint ShenandoahWorkerPolicy::calc_workers_for_final_marking() { |
| return _prev_par_marking; |
| } |
| |
| // Calculate workers for concurrent evacuation (concurrent GC) |
| uint ShenandoahWorkerPolicy::calc_workers_for_conc_evac() { |
| uint active_workers = (_prev_conc_evac == 0) ? ConcGCThreads : _prev_conc_evac; |
| _prev_conc_evac = |
| AdaptiveSizePolicy::calc_active_conc_workers(ConcGCThreads, |
| active_workers, |
| Threads::number_of_non_daemon_threads()); |
| return _prev_conc_evac; |
| } |
| |
| // Calculate workers for parallel fullgc |
| uint ShenandoahWorkerPolicy::calc_workers_for_fullgc() { |
| uint active_workers = (_prev_fullgc == 0) ? ParallelGCThreads : _prev_fullgc; |
| _prev_fullgc = |
| AdaptiveSizePolicy::calc_active_workers(ParallelGCThreads, |
| active_workers, |
| Threads::number_of_non_daemon_threads()); |
| return _prev_fullgc; |
| } |
| |
| // Calculate workers for parallel degenerated gc |
| uint ShenandoahWorkerPolicy::calc_workers_for_stw_degenerated() { |
| uint active_workers = (_prev_degengc == 0) ? ParallelGCThreads : _prev_degengc; |
| _prev_degengc = |
| AdaptiveSizePolicy::calc_active_workers(ParallelGCThreads, |
| active_workers, |
| Threads::number_of_non_daemon_threads()); |
| return _prev_degengc; |
| } |
| |
| // Calculate workers for concurrent reference update |
| uint ShenandoahWorkerPolicy::calc_workers_for_conc_update_ref() { |
| uint active_workers = (_prev_conc_update_ref == 0) ? ConcGCThreads : _prev_conc_update_ref; |
| _prev_conc_update_ref = |
| AdaptiveSizePolicy::calc_active_conc_workers(ConcGCThreads, |
| active_workers, |
| Threads::number_of_non_daemon_threads()); |
| return _prev_conc_update_ref; |
| } |
| |
| // Calculate workers for parallel reference update |
| uint ShenandoahWorkerPolicy::calc_workers_for_final_update_ref() { |
| uint active_workers = (_prev_par_update_ref == 0) ? ParallelGCThreads : _prev_par_update_ref; |
| _prev_par_update_ref = |
| AdaptiveSizePolicy::calc_active_workers(ParallelGCThreads, |
| active_workers, |
| Threads::number_of_non_daemon_threads()); |
| return _prev_par_update_ref; |
| } |
| |
| uint ShenandoahWorkerPolicy::calc_workers_for_conc_preclean() { |
| // Precleaning is single-threaded |
| return 1; |
| } |
| |
| uint ShenandoahWorkerPolicy::calc_workers_for_conc_cleanup() { |
| uint active_workers = (_prev_conc_cleanup == 0) ? ConcGCThreads : _prev_conc_cleanup; |
| _prev_conc_cleanup = |
| AdaptiveSizePolicy::calc_active_conc_workers(ConcGCThreads, |
| active_workers, |
| Threads::number_of_non_daemon_threads()); |
| return _prev_conc_cleanup; |
| } |
| |
| uint ShenandoahWorkerPolicy::calc_workers_for_conc_reset() { |
| uint active_workers = (_prev_conc_reset == 0) ? ConcGCThreads : _prev_conc_reset; |
| _prev_conc_reset = |
| AdaptiveSizePolicy::calc_active_conc_workers(ConcGCThreads, |
| active_workers, |
| Threads::number_of_non_daemon_threads()); |
| return _prev_conc_reset; |
| } |