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1#ifndef KMP_STATS_TIMING_H2#define KMP_STATS_TIMING_H3 4/** @file kmp_stats_timing.h5 * Access to real time clock and timers.6 */7 8//===----------------------------------------------------------------------===//9//10// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.11// See https://llvm.org/LICENSE.txt for license information.12// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception13//14//===----------------------------------------------------------------------===//15 16#include "kmp_os.h"17#include <limits>18#include <stdint.h>19#include <string>20#if KMP_HAVE_X86INTRIN_H21#include <x86intrin.h>22#endif23 24class tsc_tick_count {25private:26 int64_t my_count;27 28public:29 class tsc_interval_t {30 int64_t value;31 explicit tsc_interval_t(int64_t _value) : value(_value) {}32 33 public:34 tsc_interval_t() : value(0) {} // Construct 0 time duration35#if KMP_HAVE_TICK_TIME36 double seconds() const; // Return the length of a time interval in seconds37#endif38 double ticks() const { return double(value); }39 int64_t getValue() const { return value; }40 tsc_interval_t &operator=(int64_t nvalue) {41 value = nvalue;42 return *this;43 }44 45 friend class tsc_tick_count;46 47 friend tsc_interval_t operator-(const tsc_tick_count &t1,48 const tsc_tick_count &t0);49 friend tsc_interval_t operator-(const tsc_tick_count::tsc_interval_t &i1,50 const tsc_tick_count::tsc_interval_t &i0);51 friend tsc_interval_t &operator+=(tsc_tick_count::tsc_interval_t &i1,52 const tsc_tick_count::tsc_interval_t &i0);53 };54 55#if KMP_HAVE___BUILTIN_READCYCLECOUNTER56 tsc_tick_count()57 : my_count(static_cast<int64_t>(__builtin_readcyclecounter())) {}58#elif KMP_HAVE___RDTSC59 tsc_tick_count() : my_count(static_cast<int64_t>(__rdtsc())) {}60#else61#error Must have high resolution timer defined62#endif63 tsc_tick_count(int64_t value) : my_count(value) {}64 int64_t getValue() const { return my_count; }65 tsc_tick_count later(tsc_tick_count const other) const {66 return my_count > other.my_count ? (*this) : other;67 }68 tsc_tick_count earlier(tsc_tick_count const other) const {69 return my_count < other.my_count ? (*this) : other;70 }71#if KMP_HAVE_TICK_TIME72 static double tick_time(); // returns seconds per cycle (period) of clock73#endif74 static tsc_tick_count now() {75 return tsc_tick_count();76 } // returns the rdtsc register value77 friend tsc_tick_count::tsc_interval_t operator-(const tsc_tick_count &t1,78 const tsc_tick_count &t0);79};80 81inline tsc_tick_count::tsc_interval_t operator-(const tsc_tick_count &t1,82 const tsc_tick_count &t0) {83 return tsc_tick_count::tsc_interval_t(t1.my_count - t0.my_count);84}85 86inline tsc_tick_count::tsc_interval_t87operator-(const tsc_tick_count::tsc_interval_t &i1,88 const tsc_tick_count::tsc_interval_t &i0) {89 return tsc_tick_count::tsc_interval_t(i1.value - i0.value);90}91 92inline tsc_tick_count::tsc_interval_t &93operator+=(tsc_tick_count::tsc_interval_t &i1,94 const tsc_tick_count::tsc_interval_t &i0) {95 i1.value += i0.value;96 return i1;97}98 99#if KMP_HAVE_TICK_TIME100inline double tsc_tick_count::tsc_interval_t::seconds() const {101 return value * tick_time();102}103#endif104 105extern std::string formatSI(double interval, int width, char unit);106 107inline std::string formatSeconds(double interval, int width) {108 return formatSI(interval, width, 'S');109}110 111inline std::string formatTicks(double interval, int width) {112 return formatSI(interval, width, 'T');113}114 115#endif // KMP_STATS_TIMING_H116