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.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "gc/shared/gcTraceTime.hpp"
  27 #include "logging/log.hpp"
  28 #include "runtime/os.hpp"
  29 
  30 GCTraceCPUTime::GCTraceCPUTime() :
  31   _active(Log<LOG_TAGS(gc, cpu)>::is_info()),
  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 
  47 GCTraceCPUTime::~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 }