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10405
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1 /*
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2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26 #include "gc_implementation/shared/gcTimer.hpp"
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27 #include "gc_implementation/shared/gcTraceTime.hpp"
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28 #include "runtime/globals.hpp"
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29 #include "runtime/os.hpp"
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30 #include "runtime/safepoint.hpp"
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31 #include "runtime/thread.inline.hpp"
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32 #include "runtime/timer.hpp"
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33 #include "utilities/ostream.hpp"
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34
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35
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36 GCTraceTime::GCTraceTime(const char* title, bool doit, bool print_cr, GCTimer* timer) :
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37 _title(title), _doit(doit), _print_cr(print_cr), _timer(timer) {
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38 if (_doit || _timer != NULL) {
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39 _start_counter = os::elapsed_counter();
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40 }
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41
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42 if (_timer != NULL) {
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43 assert(SafepointSynchronize::is_at_safepoint(), "Tracing currently only supported at safepoints");
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44 assert(Thread::current()->is_VM_thread(), "Tracing currently only supported from the VM thread");
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45
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46 _timer->register_gc_phase_start(title, _start_counter);
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47 }
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48
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49 if (_doit) {
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50 if (PrintGCTimeStamps) {
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51 gclog_or_tty->stamp();
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52 gclog_or_tty->print(": ");
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53 }
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54 gclog_or_tty->print("[%s", title);
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55 gclog_or_tty->flush();
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56 }
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57 }
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58
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59 GCTraceTime::~GCTraceTime() {
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60 jlong stop_counter = 0;
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61
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62 if (_doit || _timer != NULL) {
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63 stop_counter = os::elapsed_counter();
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64 }
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65
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66 if (_timer != NULL) {
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67 _timer->register_gc_phase_end(stop_counter);
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68 }
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69
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70 if (_doit) {
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71 double seconds = TimeHelper::counter_to_seconds(stop_counter - _start_counter);
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72 if (_print_cr) {
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73 gclog_or_tty->print_cr(", %3.7f secs]", seconds);
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74 } else {
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75 gclog_or_tty->print(", %3.7f secs]", seconds);
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76 }
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77 gclog_or_tty->flush();
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78 }
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79 }
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