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#include "precompiled.hpp"
25
26#include "gc/shenandoah/shenandoahHeap.inline.hpp"
27#include "gc/shenandoah/shenandoahThreadLocalData.hpp"
28#include "gc/shenandoah/shenandoahWorkGroup.hpp"
29#include "gc/shenandoah/shenandoahTaskqueue.hpp"
30
31#include "logging/log.hpp"
32
33ShenandoahWorkerScope::ShenandoahWorkerScope(WorkGang* workers, uint nworkers, const char* msg, bool check) :
34 _workers(workers) {
35 assert(msg != NULL, "Missing message");
36
37 _n_workers = _workers->update_active_workers(nworkers);
38 assert(_n_workers <= nworkers, "Must be");
39
40 log_info(gc, task)("Using %u of %u workers for %s",
41 _n_workers, ShenandoahHeap::heap()->max_workers(), msg);
42
43 if (check) {
44 ShenandoahHeap::heap()->assert_gc_workers(_n_workers);
45 }
46}
47
48ShenandoahWorkerScope::~ShenandoahWorkerScope() {
49 assert(_workers->active_workers() == _n_workers,
50 "Active workers can not be changed within this scope");
51}
52
53ShenandoahPushWorkerScope::ShenandoahPushWorkerScope(WorkGang* workers, uint nworkers, bool check) :
54 _old_workers(workers->active_workers()),
55 _workers(workers) {
56 _n_workers = _workers->update_active_workers(nworkers);
57 assert(_n_workers <= nworkers, "Must be");
58
59 // bypass concurrent/parallel protocol check for non-regular paths, e.g. verifier, etc.
60 if (check) {
61 ShenandoahHeap::heap()->assert_gc_workers(_n_workers);
62 }
63}
64
65ShenandoahPushWorkerScope::~ShenandoahPushWorkerScope() {
66 assert(_workers->active_workers() == _n_workers,
67 "Active workers can not be changed within this scope");
68 // Restore old worker value
69 uint nworkers = _workers->update_active_workers(_old_workers);
70 assert(nworkers == _old_workers, "Must be able to restore");
71}
72
73ShenandoahPushWorkerQueuesScope::ShenandoahPushWorkerQueuesScope(WorkGang* workers, ShenandoahObjToScanQueueSet* queues, uint nworkers, bool check) :
74 ShenandoahPushWorkerScope(workers, nworkers, check), _queues(queues) {
75 _queues->reserve(_n_workers);
76}
77
78ShenandoahPushWorkerQueuesScope::~ShenandoahPushWorkerQueuesScope() {
79 // Restore old worker value
80 _queues->reserve(_old_workers);
81}
82
83AbstractGangWorker* ShenandoahWorkGang::install_worker(uint which) {
84 AbstractGangWorker* worker = WorkGang::install_worker(which);
85 ShenandoahThreadLocalData::create(worker);
86 if (_initialize_gclab) {
87 ShenandoahThreadLocalData::initialize_gclab(worker);
88 }
89 return worker;
90}
91