| #ifndef KMP_STATS_TIMING_H |
| #define KMP_STATS_TIMING_H |
| |
| /** @file kmp_stats_timing.h |
| * Access to real time clock and timers. |
| */ |
| |
| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.txt for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "kmp_os.h" |
| #include <limits> |
| #include <stdint.h> |
| #include <string> |
| #if KMP_HAVE_X86INTRIN_H |
| #include <x86intrin.h> |
| #endif |
| |
| class tsc_tick_count { |
| private: |
| int64_t my_count; |
| |
| public: |
| class tsc_interval_t { |
| int64_t value; |
| explicit tsc_interval_t(int64_t _value) : value(_value) {} |
| |
| public: |
| tsc_interval_t() : value(0) {} // Construct 0 time duration |
| #if KMP_HAVE_TICK_TIME |
| double seconds() const; // Return the length of a time interval in seconds |
| #endif |
| double ticks() const { return double(value); } |
| int64_t getValue() const { return value; } |
| tsc_interval_t &operator=(int64_t nvalue) { |
| value = nvalue; |
| return *this; |
| } |
| |
| friend class tsc_tick_count; |
| |
| friend tsc_interval_t operator-(const tsc_tick_count &t1, |
| const tsc_tick_count &t0); |
| friend tsc_interval_t operator-(const tsc_tick_count::tsc_interval_t &i1, |
| const tsc_tick_count::tsc_interval_t &i0); |
| friend tsc_interval_t &operator+=(tsc_tick_count::tsc_interval_t &i1, |
| const tsc_tick_count::tsc_interval_t &i0); |
| }; |
| |
| #if KMP_HAVE___BUILTIN_READCYCLECOUNTER |
| tsc_tick_count() |
| : my_count(static_cast<int64_t>(__builtin_readcyclecounter())) {} |
| #elif KMP_HAVE___RDTSC |
| tsc_tick_count() : my_count(static_cast<int64_t>(__rdtsc())) {} |
| #else |
| #error Must have high resolution timer defined |
| #endif |
| tsc_tick_count(int64_t value) : my_count(value) {} |
| int64_t getValue() const { return my_count; } |
| tsc_tick_count later(tsc_tick_count const other) const { |
| return my_count > other.my_count ? (*this) : other; |
| } |
| tsc_tick_count earlier(tsc_tick_count const other) const { |
| return my_count < other.my_count ? (*this) : other; |
| } |
| #if KMP_HAVE_TICK_TIME |
| static double tick_time(); // returns seconds per cycle (period) of clock |
| #endif |
| static tsc_tick_count now() { |
| return tsc_tick_count(); |
| } // returns the rdtsc register value |
| friend tsc_tick_count::tsc_interval_t operator-(const tsc_tick_count &t1, |
| const tsc_tick_count &t0); |
| }; |
| |
| inline tsc_tick_count::tsc_interval_t operator-(const tsc_tick_count &t1, |
| const tsc_tick_count &t0) { |
| return tsc_tick_count::tsc_interval_t(t1.my_count - t0.my_count); |
| } |
| |
| inline tsc_tick_count::tsc_interval_t |
| operator-(const tsc_tick_count::tsc_interval_t &i1, |
| const tsc_tick_count::tsc_interval_t &i0) { |
| return tsc_tick_count::tsc_interval_t(i1.value - i0.value); |
| } |
| |
| inline tsc_tick_count::tsc_interval_t & |
| operator+=(tsc_tick_count::tsc_interval_t &i1, |
| const tsc_tick_count::tsc_interval_t &i0) { |
| i1.value += i0.value; |
| return i1; |
| } |
| |
| #if KMP_HAVE_TICK_TIME |
| inline double tsc_tick_count::tsc_interval_t::seconds() const { |
| return value * tick_time(); |
| } |
| #endif |
| |
| extern std::string formatSI(double interval, int width, char unit); |
| |
| inline std::string formatSeconds(double interval, int width) { |
| return formatSI(interval, width, 'S'); |
| } |
| |
| inline std::string formatTicks(double interval, int width) { |
| return formatSI(interval, width, 'T'); |
| } |
| |
| #endif // KMP_STATS_TIMING_H |