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/gcId.hpp" 27 #include "gc/shared/gcTimer.hpp" 28 #include "gc/shared/gcTrace.hpp" 29 #include "gc/shared/gcTraceTime.hpp" 30 #include "runtime/globals.hpp" 31 #include "runtime/os.hpp" 32 #include "runtime/safepoint.hpp" 33 #include "runtime/thread.inline.hpp" 34 #include "runtime/timer.hpp" 35 #include "utilities/ostream.hpp" 36 #include "utilities/ticks.inline.hpp" 37 38 39 GCTraceTime::GCTraceTime(const char* title, bool doit, bool print_cr, GCTimer* timer) : 40 _title(title), _doit(doit), _print_cr(print_cr), _timer(timer), _start_counter() { 41 if (_doit || _timer != NULL) { 42 _start_counter.stamp(); 43 } 44 45 if (_timer != NULL) { 46 assert(SafepointSynchronize::is_at_safepoint(), "Tracing currently only supported at safepoints"); 47 assert(Thread::current()->is_VM_thread(), "Tracing currently only supported from the VM thread"); 48 49 _timer->register_gc_phase_start(title, _start_counter); 50 } 51 52 if (_doit) { 53 gclog_or_tty->gclog_stamp(); 54 gclog_or_tty->print("[%s", title); 55 gclog_or_tty->flush(); 56 } 57 } 58 59 GCTraceTime::~GCTraceTime() { 60 Ticks stop_counter; 61 62 if (_doit || _timer != NULL) { 63 stop_counter.stamp(); 64 } 65 66 if (_timer != NULL) { 67 _timer->register_gc_phase_end(stop_counter); 68 } 69 70 if (_doit) { 71 const Tickspan duration = stop_counter - _start_counter; 72 double duration_in_seconds = TicksToTimeHelper::seconds(duration); 73 if (_print_cr) { 74 gclog_or_tty->print_cr(", %3.7f secs]", duration_in_seconds); 75 } else { 76 gclog_or_tty->print(", %3.7f secs]", duration_in_seconds); 77 } 78 gclog_or_tty->flush(); 79 } 80 }