gcTraceTime.cpp revision 9727:f944761a3ce3 
1/*
2 * Copyright (c) 2012, 2015, 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.
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23 */
24
25#include "precompiled.hpp"
26#include "gc/shared/gcTraceTime.inline.hpp"
27#include "logging/log.hpp"
28#include "runtime/os.hpp"
29
30GCTraceCPUTime::GCTraceCPUTime() :
31  _active(log_is_enabled(Info, gc, cpu)),
32  _starting_user_time(0.0),
33  _starting_system_time(0.0),
34  _starting_real_time(0.0)
35{
36  if (_active) {
37    bool valid = os::getTimesSecs(&_starting_real_time,
38                               &_starting_user_time,
39                               &_starting_system_time);
40    if (!valid) {
41      log_warning(gc, cpu)("TraceCPUTime: os::getTimesSecs() returned invalid result");
42      _active = false;
43    }
44  }
45}
46
47GCTraceCPUTime::~GCTraceCPUTime() {
48  if (_active) {
49    double real_time, user_time, system_time;
50    bool valid = os::getTimesSecs(&real_time, &user_time, &system_time);
51    if (valid) {
52      log_info(gc, cpu)("User=%3.2fs Sys=%3.2fs Real=%3.2fs",
53                        user_time - _starting_user_time,
54                        system_time - _starting_system_time,
55                        real_time - _starting_real_time);
56    } else {
57      log_warning(gc, cpu)("TraceCPUTime: os::getTimesSecs() returned invalid result");
58    }
59  }
60}
61