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1 /* |
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2 * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 #include "precompiled.hpp" |
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26 #include "jfr/utilities/jfrTime.hpp" |
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27 #include "runtime/os.hpp" |
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28 #ifdef X86 |
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29 #include "rdtsc_x86.hpp" |
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30 #endif |
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31 |
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32 #include OS_HEADER_INLINE(os) |
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33 |
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34 bool JfrTime::_ft_enabled = false; |
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35 |
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36 bool JfrTime::initialize() { |
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37 static bool initialized = false; |
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38 if (!initialized) { |
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39 #ifdef X86 |
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40 _ft_enabled = Rdtsc::initialize(); |
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41 #else |
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42 _ft_enabled = false; |
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43 #endif |
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44 initialized = true; |
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45 } |
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46 return initialized; |
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47 } |
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48 |
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49 bool JfrTime::is_ft_supported() { |
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50 #ifdef X86 |
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51 return Rdtsc::is_supported(); |
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52 #else |
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53 return false; |
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54 #endif |
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55 } |
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56 |
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57 |
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58 const void* JfrTime::time_function() { |
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59 #ifdef X86 |
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60 return _ft_enabled ? (const void*)Rdtsc::elapsed_counter : (const void*)os::elapsed_counter; |
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61 #else |
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62 return (const void*)os::elapsed_counter; |
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63 #endif |
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64 } |
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65 |
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66 jlong JfrTime::frequency() { |
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67 #ifdef X86 |
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68 return _ft_enabled ? Rdtsc::frequency() : os::elapsed_frequency(); |
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69 #else |
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70 return os::elapsed_frequency(); |
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71 #endif |
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72 } |
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73 |