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 #include "utilities/ticks.inline.hpp" 35 36 37 GCTraceTime::GCTraceTime(const char* title, bool doit, bool print_cr, GCTimer* timer) : 38 _title(title), _doit(doit), _print_cr(print_cr), _timer(timer), _start_counter() { 39 if (_doit || _timer != NULL) { 40 _start_counter.stamp(); 41 } 42 43 if (_timer != NULL) { 44 assert(SafepointSynchronize::is_at_safepoint(), "Tracing currently only supported at safepoints"); 45 assert(Thread::current()->is_VM_thread(), "Tracing currently only supported from the VM thread"); 46 47 _timer->register_gc_phase_start(title, _start_counter); 48 } 49 50 if (_doit) { 51 if (PrintGCTimeStamps) { 52 gclog_or_tty->stamp(); 53 gclog_or_tty->print(": "); 54 } 55 gclog_or_tty->print("[%s", title); 56 gclog_or_tty->flush(); 57 } 58 } 59 60 GCTraceTime::~GCTraceTime() { 61 Ticks stop_counter; 62 63 if (_doit || _timer != NULL) { 64 stop_counter.stamp(); 65 } 66 67 if (_timer != NULL) { 68 _timer->register_gc_phase_end(stop_counter); 69 } 70 71 if (_doit) { 72 const Tickspan duration = stop_counter - _start_counter; 73 double duration_in_seconds = TicksToTimeHelper::seconds(duration); 74 if (_print_cr) { 75 gclog_or_tty->print_cr(", %3.7f secs]", duration_in_seconds); 76 } else { 77 gclog_or_tty->print(", %3.7f secs]", duration_in_seconds); 78 } 79 gclog_or_tty->flush(); 80 } 81 }