--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/gc/shenandoah/shenandoahWorkerPolicy.cpp Mon Dec 10 15:47:44 2018 +0100
@@ -0,0 +1,157 @@
+/*
+ * 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/workerPolicy.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_stw_traversal = 0;
+uint ShenandoahWorkerPolicy::_prev_conc_traversal = 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 =
+ WorkerPolicy::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 =
+ WorkerPolicy::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 =
+ WorkerPolicy::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 =
+ WorkerPolicy::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 =
+ WorkerPolicy::calc_active_workers(ParallelGCThreads,
+ active_workers,
+ Threads::number_of_non_daemon_threads());
+ return _prev_degengc;
+}
+
+// Calculate workers for Stop-the-world traversal GC
+uint ShenandoahWorkerPolicy::calc_workers_for_stw_traversal() {
+ uint active_workers = (_prev_stw_traversal == 0) ? ParallelGCThreads : _prev_stw_traversal;
+ _prev_stw_traversal =
+ WorkerPolicy::calc_active_workers(ParallelGCThreads,
+ active_workers,
+ Threads::number_of_non_daemon_threads());
+ return _prev_stw_traversal;
+}
+
+// Calculate workers for concurent traversal GC
+uint ShenandoahWorkerPolicy::calc_workers_for_conc_traversal() {
+ uint active_workers = (_prev_conc_traversal == 0) ? ConcGCThreads : _prev_conc_traversal;
+ _prev_conc_traversal =
+ WorkerPolicy::calc_active_conc_workers(ConcGCThreads,
+ active_workers,
+ Threads::number_of_non_daemon_threads());
+ return _prev_conc_traversal;
+}
+
+// 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 =
+ WorkerPolicy::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 =
+ WorkerPolicy::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 =
+ WorkerPolicy::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 =
+ WorkerPolicy::calc_active_conc_workers(ConcGCThreads,
+ active_workers,
+ Threads::number_of_non_daemon_threads());
+ return _prev_conc_reset;
+}