1 /*
2 * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_GC_SHARED_STRINGDEDUP_STRINGDEDUPTHREAD_INLINE_HPP
26 #define SHARE_GC_SHARED_STRINGDEDUP_STRINGDEDUPTHREAD_INLINE_HPP
27
28 #include "gc/shared/suspendibleThreadSet.hpp"
29 #include "gc/shared/stringdedup/stringDedupQueue.inline.hpp"
30 #include "gc/shared/stringdedup/stringDedupThread.hpp"
31
32 template <typename S>
do_deduplication()33 void StringDedupThreadImpl<S>::do_deduplication() {
34 S total_stat;
35
36 {
37 // Block safepoints while deduplicating shared strings
38 SuspendibleThreadSetJoiner sts_join;
39 deduplicate_shared_strings(&total_stat);
40 }
41
42 // Main loop
43 for (;;) {
44 S stat;
45
46 stat.mark_idle();
47
48 // Wait for the queue to become non-empty
49 StringDedupQueue::wait();
50 if (this->should_terminate()) {
51 break;
52 }
53
54 {
55 // Include thread in safepoints
56 SuspendibleThreadSetJoiner sts_join;
57
58 stat.mark_exec();
59 StringDedupStat::print_start(&stat);
60
61 // Process the queue
62 for (;;) {
63 oop java_string = StringDedupQueue::pop();
64 if (java_string == NULL) {
65 break;
66 }
67
68 StringDedupTable::deduplicate(java_string, &stat);
69
70 // Safepoint this thread if needed
71 if (sts_join.should_yield()) {
72 stat.mark_block();
73 sts_join.yield();
74 stat.mark_unblock();
75 }
76 }
77
78 stat.mark_done();
79
80 total_stat.add(&stat);
81 print_end(&stat, &total_stat);
82 stat.reset();
83 }
84
85 StringDedupTable::clean_entry_cache();
86 }
87 }
88
89 template <typename S>
create()90 void StringDedupThreadImpl<S>::create() {
91 assert(_thread == NULL, "One string deduplication thread allowed");
92 _thread = new StringDedupThreadImpl<S>();
93 }
94
95 #endif // SHARE_GC_SHARED_STRINGDEDUP_STRINGDEDUPTHREAD_INLINE_HPP
96