Fri, 17 May 2013 17:24:20 +0200
7176220: 'Full GC' events miss date stamp information occasionally
Summary: Move date stamp logic into GCTraceTime
Reviewed-by: brutisso, tschatzl
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.
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5 * This code is free software; you can redistribute it and/or modify it
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7 * published by the Free Software Foundation.
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
25 #include "precompiled.hpp"
26 #include "gc_implementation/shared/gcTimer.hpp"
27 #include "gc_implementation/shared/gcTrace.hpp"
28 #include "gc_implementation/shared/gcTraceTime.hpp"
29 #include "runtime/globals.hpp"
30 #include "runtime/os.hpp"
31 #include "runtime/safepoint.hpp"
32 #include "runtime/thread.inline.hpp"
33 #include "runtime/timer.hpp"
34 #include "utilities/ostream.hpp"
35 #include "utilities/ticks.inline.hpp"
38 GCTraceTime::GCTraceTime(const char* title, bool doit, bool print_cr, GCTimer* timer, GCId gc_id) :
39 _title(title), _doit(doit), _print_cr(print_cr), _timer(timer), _start_counter() {
40 if (_doit || _timer != NULL) {
41 _start_counter.stamp();
42 }
44 if (_timer != NULL) {
45 assert(SafepointSynchronize::is_at_safepoint(), "Tracing currently only supported at safepoints");
46 assert(Thread::current()->is_VM_thread(), "Tracing currently only supported from the VM thread");
48 _timer->register_gc_phase_start(title, _start_counter);
49 }
51 if (_doit) {
52 gclog_or_tty->date_stamp(PrintGCDateStamps);
53 gclog_or_tty->stamp(PrintGCTimeStamps);
54 if (PrintGCID) {
55 gclog_or_tty->print("#%u: ", gc_id.id());
56 }
57 gclog_or_tty->print("[%s", title);
58 gclog_or_tty->flush();
59 }
60 }
62 GCTraceTime::~GCTraceTime() {
63 Ticks stop_counter;
65 if (_doit || _timer != NULL) {
66 stop_counter.stamp();
67 }
69 if (_timer != NULL) {
70 _timer->register_gc_phase_end(stop_counter);
71 }
73 if (_doit) {
74 const Tickspan duration = stop_counter - _start_counter;
75 double duration_in_seconds = TicksToTimeHelper::seconds(duration);
76 if (_print_cr) {
77 gclog_or_tty->print_cr(", %3.7f secs]", duration_in_seconds);
78 } else {
79 gclog_or_tty->print(", %3.7f secs]", duration_in_seconds);
80 }
81 gclog_or_tty->flush();
82 }
83 }