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#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 <stdint.h>
#include <string>
#include <limits>
#include "kmp_os.h"
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
double seconds() const; // Return the length of a time interval in seconds
double ticks() const { return double(value); }
int64_t getValue() const { return value; }
friend class tsc_tick_count;
friend tsc_interval_t operator-(
const tsc_tick_count t1, const tsc_tick_count t0);
};
tsc_tick_count() : my_count(static_cast<int64_t>(__rdtsc())) {};
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;
}
static double tick_time(); // returns seconds per cycle (period) of clock
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 double tsc_tick_count::tsc_interval_t::seconds() const
{
return value*tick_time();
}
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');
}
class timePair
{
tsc_tick_count KMP_ALIGN_CACHE start;
tsc_tick_count end;
public:
timePair() : start(-std::numeric_limits<int64_t>::max()), end(-std::numeric_limits<int64_t>::max()) {}
tsc_tick_count get_start() const { return start; }
tsc_tick_count get_end() const { return end; }
tsc_tick_count * get_startp() { return &start; }
tsc_tick_count * get_endp() { return &end; }
void markStart() { start = tsc_tick_count::now(); }
void markEnd() { end = tsc_tick_count::now(); }
void set_start(tsc_tick_count s) { start = s; }
void set_end (tsc_tick_count e) { end = e; }
tsc_tick_count::tsc_interval_t duration() const { return end-start; }
std::string format() const;
};
extern tsc_tick_count::tsc_interval_t computeLastInLastOutInterval(timePair * times, int nTimes);
#endif // KMP_STATS_TIMING_H
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