1 /* 2 * Copyright (c) 2013, 2018, 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 "jfr/utilities/jfrTraceTime.hpp" 27 #include "runtime/os.hpp" 28 #ifdef X86 29 #include "rdtsc_x86.hpp" 30 #endif 31 32 #include OS_HEADER_INLINE(os) 33 34 bool JfrTraceTime::_ft_enabled = false; 35 36 bool JfrTraceTime::initialize() { 37 static bool initialized = false; 38 if (!initialized) { 39 #ifdef X86 40 _ft_enabled = Rdtsc::initialize(); 41 #else 42 _ft_enabled = false; 43 #endif 44 initialized = true; 45 } 46 return initialized; 47 } 48 49 bool JfrTraceTime::is_ft_supported() { 50 #ifdef X86 51 return Rdtsc::is_supported(); 52 #else 53 return false; 54 #endif 55 } 56 57 JfrTraceTime::JfrTraceTime() { 58 #ifdef X86 59 _ticks = _ft_enabled ? Rdtsc::elapsed_counter() : os::elapsed_counter(); 60 #else 61 _ticks = os::elapsed_counter(); 62 #endif 63 } 64 65 JfrTraceTime JfrTraceTime::now() { 66 return JfrTraceTime(); 67 } 68 69 void JfrTraceTime::stamp() { 70 _ticks = now().value(); 71 } 72 73 const void* JfrTraceTime::time_function() { 74 #ifdef X86 75 return _ft_enabled ? (const void*)Rdtsc::elapsed_counter : (const void*)os::elapsed_counter; 76 #else 77 return (const void*)os::elapsed_counter; 78 #endif 79 } 80 81 jlong JfrTraceTime::frequency() { 82 #ifdef X86 83 return _ft_enabled ? Rdtsc::frequency() : os::elapsed_frequency(); 84 #else 85 return os::elapsed_frequency(); 86 #endif 87 } 88