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src/share/vm/utilities/ticks.cpp

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   1 /*
   2  * Copyright (c) 2013, 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 "runtime/os.hpp"
  27 #include "utilities/ticks.inline.hpp"
  28 
  29 #ifdef ASSERT
  30  const jlong Ticks::invalid_time_stamp = -2; // 0xFFFF FFFF`FFFF FFFE
  31 #endif
  32 
  33 void Ticks::stamp() {
  34   _stamp_ticks = os::elapsed_counter();

  35 }
  36 
  37 const Ticks Ticks::now() {
  38   Ticks t;
  39   t.stamp();
  40   return t;
  41 }
  42 
  43 Tickspan::Tickspan(const Ticks& end, const Ticks& start) {
  44   assert(end.value() != Ticks::invalid_time_stamp, "end is unstamped!");
  45   assert(start.value() != Ticks::invalid_time_stamp, "start is unstamped!");




  46 
  47   assert(end >= start, "negative time!");


  48 
  49   _span_ticks = end.value() - start.value();

  50 }
  51 
  52 template <typename ReturnType>
  53 static ReturnType time_conversion(const Tickspan& span, TicksToTimeHelper::Unit unit) {
  54   assert(TicksToTimeHelper::SECONDS == unit ||
  55          TicksToTimeHelper::MILLISECONDS == unit, "invalid unit!");

























  56 
  57   ReturnType frequency_per_unit = (ReturnType)os::elapsed_frequency() / (ReturnType)unit;



































  58 
  59   return (ReturnType) ((ReturnType)span.value() / frequency_per_unit);

  60 }
  61 
  62 double TicksToTimeHelper::seconds(const Tickspan& span) {
  63   return time_conversion<double>(span, SECONDS);
  64 }
  65 
  66 jlong TicksToTimeHelper::milliseconds(const Tickspan& span) {
  67   return time_conversion<jlong>(span, MILLISECONDS);
  68 }
   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 "runtime/os.hpp"
  27 #include "utilities/ticks.hpp"
  28 
  29 #if defined(X86) && !defined(ZERO)
  30 #include "rdtsc_x86.hpp"
  31 #endif
  32 
  33 template <typename TimeSource, const int unit>
  34 inline double conversion(typename TimeSource::Type& value) {
  35   return (double)value * ((double)unit / (double)TimeSource::frequency());
  36 }
  37 
  38 uint64_t ElapsedCounterSource::frequency() {
  39   static const uint64_t freq = (uint64_t)os::elapsed_frequency();
  40   return freq;

  41 }
  42 
  43 ElapsedCounterSource::Type ElapsedCounterSource::now() {
  44   return os::elapsed_counter();
  45 }
  46 
  47 double ElapsedCounterSource::seconds(Type value) {
  48   return conversion<ElapsedCounterSource, 1>(value);
  49 }
  50 
  51 uint64_t ElapsedCounterSource::milliseconds(Type value) {
  52   return (uint64_t)conversion<ElapsedCounterSource, MILLIUNITS>(value);
  53 }
  54 
  55 uint64_t ElapsedCounterSource::microseconds(Type value) {
  56   return (uint64_t)conversion<ElapsedCounterSource, MICROUNITS>(value);
  57 }
  58 
  59 uint64_t ElapsedCounterSource::nanoseconds(Type value) {
  60   return (uint64_t)conversion<ElapsedCounterSource, NANOUNITS>(value);
  61 }
  62 
  63 uint64_t FastUnorderedElapsedCounterSource::frequency() {
  64 #if defined(X86) && !defined(ZERO)
  65   static bool valid_rdtsc = Rdtsc::initialize();
  66   if (valid_rdtsc) {
  67     static const uint64_t freq = (uint64_t)Rdtsc::frequency();
  68     return freq;
  69   }
  70 #endif
  71   static const uint64_t freq = (uint64_t)os::elapsed_frequency();
  72   return freq;
  73 }
  74 
  75 FastUnorderedElapsedCounterSource::Type FastUnorderedElapsedCounterSource::now() {
  76 #if defined(X86) && !defined(ZERO)
  77   static bool valid_rdtsc = Rdtsc::initialize();
  78   if (valid_rdtsc) {
  79     return Rdtsc::elapsed_counter();
  80   }
  81 #endif
  82   return os::elapsed_counter();
  83 }
  84 
  85 double FastUnorderedElapsedCounterSource::seconds(Type value) {
  86   return conversion<FastUnorderedElapsedCounterSource, 1>(value);
  87 }
  88 
  89 uint64_t FastUnorderedElapsedCounterSource::milliseconds(Type value) {
  90   return (uint64_t)conversion<FastUnorderedElapsedCounterSource, MILLIUNITS>(value);
  91 }
  92 
  93 uint64_t FastUnorderedElapsedCounterSource::microseconds(Type value) {
  94   return (uint64_t)conversion<FastUnorderedElapsedCounterSource, MICROUNITS>(value);
  95 }
  96 
  97 uint64_t FastUnorderedElapsedCounterSource::nanoseconds(Type value) {
  98   return (uint64_t)conversion<FastUnorderedElapsedCounterSource, NANOUNITS>(value);
  99 }
 100 
 101 uint64_t CompositeElapsedCounterSource::frequency() {
 102   return ElapsedCounterSource::frequency();
 103 }
 104 
 105 CompositeElapsedCounterSource::Type CompositeElapsedCounterSource::now() {
 106   CompositeTime ct;
 107   ct.val1 = ElapsedCounterSource::now();
 108 #if defined(X86) && !defined(ZERO)
 109   static bool initialized = false;
 110   static bool valid_rdtsc = false;
 111   if (!initialized) {
 112     valid_rdtsc = Rdtsc::initialize();
 113     initialized = true;
 114   }
 115   if (valid_rdtsc) {
 116     ct.val2 = Rdtsc::elapsed_counter();
 117   }
 118 #endif
 119   return ct;
 120 }
 121 
 122 double CompositeElapsedCounterSource::seconds(Type value) {
 123   return conversion<ElapsedCounterSource, 1>(value.val1);
 124 }
 125 
 126 uint64_t CompositeElapsedCounterSource::milliseconds(Type value) {
 127   return (uint64_t)conversion<ElapsedCounterSource, MILLIUNITS>(value.val1);
 128 }
 129 
 130 uint64_t CompositeElapsedCounterSource::microseconds(Type value) {
 131   return (uint64_t)conversion<ElapsedCounterSource, MICROUNITS>(value.val1);
 132 }
 133 
 134 uint64_t CompositeElapsedCounterSource::nanoseconds(Type value) {
 135   return (uint64_t)conversion<ElapsedCounterSource, NANOUNITS>(value.val1);
 136 }
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