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116 lines
3.6 KiB
C++
116 lines
3.6 KiB
C++
#ifndef KMP_STATS_TIMING_H
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#define KMP_STATS_TIMING_H
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/** @file kmp_stats_timing.h
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* Access to real time clock and timers.
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*/
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "kmp_os.h"
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#include <limits>
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#include <stdint.h>
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#include <string>
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#if KMP_HAVE_X86INTRIN_H
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#include <x86intrin.h>
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#endif
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#include "libc/nexgen32e/rdtsc.h"
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class tsc_tick_count {
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private:
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int64_t my_count;
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public:
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class tsc_interval_t {
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int64_t value;
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explicit tsc_interval_t(int64_t _value) : value(_value) {}
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public:
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tsc_interval_t() : value(0) {} // Construct 0 time duration
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#if KMP_HAVE_TICK_TIME
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double seconds() const; // Return the length of a time interval in seconds
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#endif
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double ticks() const { return double(value); }
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int64_t getValue() const { return value; }
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tsc_interval_t &operator=(int64_t nvalue) {
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value = nvalue;
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return *this;
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}
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friend class tsc_tick_count;
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friend tsc_interval_t operator-(const tsc_tick_count &t1,
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const tsc_tick_count &t0);
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friend tsc_interval_t operator-(const tsc_tick_count::tsc_interval_t &i1,
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const tsc_tick_count::tsc_interval_t &i0);
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friend tsc_interval_t &operator+=(tsc_tick_count::tsc_interval_t &i1,
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const tsc_tick_count::tsc_interval_t &i0);
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};
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#if KMP_HAVE___BUILTIN_READCYCLECOUNTER
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tsc_tick_count()
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: my_count(static_cast<int64_t>(__builtin_readcyclecounter())) {}
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#elif KMP_HAVE___RDTSC
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tsc_tick_count() : my_count(static_cast<int64_t>(rdtsc())) {}
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#else
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#error Must have high resolution timer defined
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#endif
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tsc_tick_count(int64_t value) : my_count(value) {}
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int64_t getValue() const { return my_count; }
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tsc_tick_count later(tsc_tick_count const other) const {
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return my_count > other.my_count ? (*this) : other;
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}
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tsc_tick_count earlier(tsc_tick_count const other) const {
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return my_count < other.my_count ? (*this) : other;
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}
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#if KMP_HAVE_TICK_TIME
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static double tick_time(); // returns seconds per cycle (period) of clock
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#endif
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static tsc_tick_count now() {
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return tsc_tick_count();
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} // returns the rdtsc register value
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friend tsc_tick_count::tsc_interval_t operator-(const tsc_tick_count &t1,
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const tsc_tick_count &t0);
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};
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inline tsc_tick_count::tsc_interval_t operator-(const tsc_tick_count &t1,
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const tsc_tick_count &t0) {
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return tsc_tick_count::tsc_interval_t(t1.my_count - t0.my_count);
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}
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inline tsc_tick_count::tsc_interval_t
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operator-(const tsc_tick_count::tsc_interval_t &i1,
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const tsc_tick_count::tsc_interval_t &i0) {
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return tsc_tick_count::tsc_interval_t(i1.value - i0.value);
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}
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inline tsc_tick_count::tsc_interval_t &
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operator+=(tsc_tick_count::tsc_interval_t &i1,
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const tsc_tick_count::tsc_interval_t &i0) {
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i1.value += i0.value;
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return i1;
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}
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#if KMP_HAVE_TICK_TIME
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inline double tsc_tick_count::tsc_interval_t::seconds() const {
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return value * tick_time();
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}
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#endif
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extern std::string formatSI(double interval, int width, char unit);
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inline std::string formatSeconds(double interval, int width) {
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return formatSI(interval, width, 'S');
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}
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inline std::string formatTicks(double interval, int width) {
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return formatSI(interval, width, 'T');
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}
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#endif // KMP_STATS_TIMING_H
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