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#include "precompiled.hpp"
25#include "gc/z/zAddress.inline.hpp"
26#include "gc/z/zThreadLocalAllocBuffer.hpp"
27#include "runtime/globals.hpp"
28#include "runtime/thread.hpp"
29
30ZPerWorker<ThreadLocalAllocStats>* ZThreadLocalAllocBuffer::_stats = NULL;
31
32void ZThreadLocalAllocBuffer::initialize() {
33 if (UseTLAB) {
34 assert(_stats == NULL, "Already initialized");
35 _stats = new ZPerWorker<ThreadLocalAllocStats>();
36 reset_statistics();
37 }
38}
39
40void ZThreadLocalAllocBuffer::reset_statistics() {
41 if (UseTLAB) {
42 ZPerWorkerIterator<ThreadLocalAllocStats> iter(_stats);
43 for (ThreadLocalAllocStats* stats; iter.next(&stats);) {
44 stats->reset();
45 }
46 }
47}
48
49void ZThreadLocalAllocBuffer::publish_statistics() {
50 if (UseTLAB) {
51 ThreadLocalAllocStats total;
52
53 ZPerWorkerIterator<ThreadLocalAllocStats> iter(_stats);
54 for (ThreadLocalAllocStats* stats; iter.next(&stats);) {
55 total.update(*stats);
56 }
57
58 total.publish();
59 }
60}
61
62static void fixup_address(HeapWord** p) {
63 *p = (HeapWord*)ZAddress::good_or_null((uintptr_t)*p);
64}
65
66void ZThreadLocalAllocBuffer::retire(Thread* thread) {
67 if (UseTLAB && thread->is_Java_thread()) {
68 ThreadLocalAllocStats* const stats = _stats->addr();
69 thread->tlab().addresses_do(fixup_address);
70 thread->tlab().retire(stats);
71 thread->tlab().resize();
72 }
73}
74
75void ZThreadLocalAllocBuffer::remap(Thread* thread) {
76 if (UseTLAB && thread->is_Java_thread()) {
77 thread->tlab().addresses_do(fixup_address);
78 }
79}
80