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comparison src/share/vm/gc_implementation/shared/gcTraceTime.cpp @ 10405:f2110083203d

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8005849: JEP 167: Event-Based JVM Tracing Reviewed-by: acorn, coleenp, sla Contributed-by: Karen Kinnear <karen.kinnear@oracle.com>, Bengt Rutisson <bengt.rutisson@oracle.com>, Calvin Cheung <calvin.cheung@oracle.com>, Erik Gahlin <erik.gahlin@oracle.com>, Erik Helin <erik.helin@oracle.com>, Jesper Wilhelmsson <jesper.wilhelmsson@oracle.com>, Keith McGuigan <keith.mcguigan@oracle.com>, Mattias Tobiasson <mattias.tobiasson@oracle.com>, Markus Gronlund <markus.gronlund@oracle.com>, Mikael Auno <mikael.auno@oracle.com>, Nils Eliasson <nils.eliasson@oracle.com>, Nils Loodin <nils.loodin@oracle.com>, Rickard Backman <rickard.backman@oracle.com>, Staffan Larsen <staffan.larsen@oracle.com>, Stefan Karlsson <stefan.karlsson@oracle.com>, Yekaterina Kantserova <yekaterina.kantserova@oracle.com>
author sla
date Mon, 10 Jun 2013 11:30:51 +0200
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children 86e6d691f2e1
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10404:d0add7016434 10405:f2110083203d
1 /*
2 * Copyright (c) 2012, 2013, 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 #include "precompiled.hpp"
26 #include "gc_implementation/shared/gcTimer.hpp"
27 #include "gc_implementation/shared/gcTraceTime.hpp"
28 #include "runtime/globals.hpp"
29 #include "runtime/os.hpp"
30 #include "runtime/safepoint.hpp"
31 #include "runtime/thread.inline.hpp"
32 #include "runtime/timer.hpp"
33 #include "utilities/ostream.hpp"
34
35
36 GCTraceTime::GCTraceTime(const char* title, bool doit, bool print_cr, GCTimer* timer) :
37 _title(title), _doit(doit), _print_cr(print_cr), _timer(timer) {
38 if (_doit || _timer != NULL) {
39 _start_counter = os::elapsed_counter();
40 }
41
42 if (_timer != NULL) {
43 assert(SafepointSynchronize::is_at_safepoint(), "Tracing currently only supported at safepoints");
44 assert(Thread::current()->is_VM_thread(), "Tracing currently only supported from the VM thread");
45
46 _timer->register_gc_phase_start(title, _start_counter);
47 }
48
49 if (_doit) {
50 if (PrintGCTimeStamps) {
51 gclog_or_tty->stamp();
52 gclog_or_tty->print(": ");
53 }
54 gclog_or_tty->print("[%s", title);
55 gclog_or_tty->flush();
56 }
57 }
58
59 GCTraceTime::~GCTraceTime() {
60 jlong stop_counter = 0;
61
62 if (_doit || _timer != NULL) {
63 stop_counter = os::elapsed_counter();
64 }
65
66 if (_timer != NULL) {
67 _timer->register_gc_phase_end(stop_counter);
68 }
69
70 if (_doit) {
71 double seconds = TimeHelper::counter_to_seconds(stop_counter - _start_counter);
72 if (_print_cr) {
73 gclog_or_tty->print_cr(", %3.7f secs]", seconds);
74 } else {
75 gclog_or_tty->print(", %3.7f secs]", seconds);
76 }
77 gclog_or_tty->flush();
78 }
79 }