1 /* 2 * Copyright (c) 2012, 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/timer.hpp" 32 #include "utilities/ostream.hpp" 33 #ifdef TARGET_OS_FAMILY_linux 34 # include "thread_linux.inline.hpp" 35 #endif 36 #ifdef TARGET_OS_FAMILY_solaris 37 # include "thread_solaris.inline.hpp" 38 #endif 39 #ifdef TARGET_OS_FAMILY_windows 40 # include "thread_windows.inline.hpp" 41 #endif 42 #ifdef TARGET_OS_FAMILY_bsd 43 # include "thread_bsd.inline.hpp" 44 #endif 45 46 47 GCTraceTime::GCTraceTime(const char* title, bool doit, bool print_cr, GCTimer* timer) : 48 _title(title), _doit(doit), _print_cr(print_cr), _timer(timer) { 49 if (_doit || _timer != NULL) { 50 _start_counter = os::elapsed_counter(); 51 } 52 53 if (_timer != NULL) { 54 assert(SafepointSynchronize::is_at_safepoint(), "Tracing currently only supported at safepoints"); 55 assert(Thread::current()->is_VM_thread(), "Tracing currently only supported from the VM thread"); 56 57 _timer->register_gc_phase_start(title, _start_counter); 58 } 59 60 if (_doit) { 61 gclog_or_tty->date_stamp(PrintGCDateStamps); 62 gclog_or_tty->stamp(PrintGCTimeStamps); 63 gclog_or_tty->print("[%s", title); 64 gclog_or_tty->flush(); 65 } 66 } 67 68 GCTraceTime::~GCTraceTime() { 69 jlong stop_counter = 0; 70 71 if (_doit || _timer != NULL) { 72 stop_counter = os::elapsed_counter(); 73 } 74 75 if (_timer != NULL) { 76 _timer->register_gc_phase_end(stop_counter); 77 } 78 79 if (_doit) { 80 double seconds = TimeHelper::counter_to_seconds(stop_counter - _start_counter); 81 if (_print_cr) { 82 gclog_or_tty->print_cr(", %3.7f secs]", seconds); 83 } else { 84 gclog_or_tty->print(", %3.7f secs]", seconds); 85 } 86 gclog_or_tty->flush(); 87 } 88 }