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1 /* |
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2 * Copyright (c) 2011, 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/jfrTimeConverter.hpp" |
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27 #include "jfr/utilities/jfrTime.hpp" |
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28 #include "runtime/os.hpp" |
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29 |
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30 #include OS_HEADER_INLINE(os) |
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31 |
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32 static double ft_counter_to_nanos_factor = .0; |
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33 static double nanos_to_ft_counter_factor = .0; |
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34 static double os_counter_to_nanos_factor = .0; |
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35 static double nanos_to_os_counter_factor = .0; |
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36 |
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37 const double JfrTimeConverter::NANOS_PER_SEC = 1000000000.0; |
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38 const double JfrTimeConverter::NANOS_PER_MILLISEC = 1000000.0; |
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39 const double JfrTimeConverter::NANOS_PER_MICROSEC = 1000.0; |
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40 |
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41 static bool initialized = false; |
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42 |
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43 void JfrTimeConverter::initialize() { |
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44 if (!initialized) { |
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45 nanos_to_os_counter_factor = (double)os::elapsed_frequency() / NANOS_PER_SEC; |
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46 assert(nanos_to_os_counter_factor != .0, "error in conversion!"); |
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47 os_counter_to_nanos_factor = (double)1.0 / nanos_to_os_counter_factor; |
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48 assert(os_counter_to_nanos_factor != .0, "error in conversion!"); |
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49 if (JfrTime::is_ft_enabled()) { |
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50 nanos_to_ft_counter_factor = (double)JfrTime::frequency() / NANOS_PER_SEC; |
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51 assert(nanos_to_ft_counter_factor != .0, "error in conversion!"); |
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52 ft_counter_to_nanos_factor = (double)1.0 / nanos_to_ft_counter_factor; |
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53 assert(ft_counter_to_nanos_factor != .0, "error in conversion!"); |
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54 } |
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55 initialized = true; |
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56 } |
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57 } |
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58 |
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59 double JfrTimeConverter::counter_to_nano_multiplier(bool is_os_time) { |
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60 if (!initialized) { |
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61 initialize(); |
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62 } |
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63 return JfrTime::is_ft_enabled() && !is_os_time ? ft_counter_to_nanos_factor : os_counter_to_nanos_factor; |
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64 } |
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65 |
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66 double JfrTimeConverter::nano_to_counter_multiplier(bool is_os_time) { |
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67 if (!initialized) { |
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68 initialize(); |
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69 } |
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70 return JfrTime::is_ft_enabled() && !is_os_time ? nanos_to_ft_counter_factor : nanos_to_os_counter_factor; |
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71 } |
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72 |
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73 double JfrTimeConverter::counter_to_nanos_internal(jlong c, bool is_os_time) { |
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74 return (double)c * counter_to_nano_multiplier(is_os_time); |
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75 } |
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76 |
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77 double JfrTimeConverter::counter_to_millis_internal(jlong c, bool is_os_time) { |
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78 return (counter_to_nanos_internal(c, is_os_time) / NANOS_PER_MILLISEC); |
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79 } |
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80 |
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81 jlong JfrTimeConverter::counter_to_nanos(jlong c, bool is_os_time) { |
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82 return (jlong)counter_to_nanos_internal(c, is_os_time); |
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83 } |
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84 |
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85 jlong JfrTimeConverter::counter_to_millis(jlong c, bool is_os_time) { |
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86 return (jlong)counter_to_millis_internal(c, is_os_time); |
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87 } |
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88 |
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89 jlong JfrTimeConverter::nanos_to_countertime(jlong nanos, bool as_os_time) { |
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90 return nanos <= 0 ? 0 : (jlong)((double)nanos * nano_to_counter_multiplier(as_os_time)); |
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91 } |