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#pragma once
#include "base.h"
#include <util/system/rusage.h>
#include <util/generic/string.h>
#include <util/stream/str.h>
class TTimer {
private:
TInstant Start_;
TStringStream Message_;
public:
TTimer(const TStringBuf message = TStringBuf(" took: "));
~TTimer();
};
class TSimpleTimer {
TInstant T;
public:
TSimpleTimer() {
Reset();
}
TDuration Get() const {
return TInstant::Now() - T;
}
void Reset() {
T = TInstant::Now();
}
};
class TProfileTimer {
TDuration T;
public:
TProfileTimer() {
Reset();
}
TDuration Get() const {
return TRusage::Get().Utime - T;
}
TDuration Step() {
TRusage r;
r.Fill();
TDuration d = r.Utime - T;
T = r.Utime;
return d;
}
void Reset() {
T = TRusage::Get().Utime;
}
};
/// Return cached processor cycle count per second. Method takes 1 second at first invocation.
/// Note, on older systems cycle rate may change during program lifetime,
/// so returned value may be incorrect. Modern Intel and AMD processors keep constant TSC rate.
ui64 GetCyclesPerMillisecond();
void SetCyclesPerSecond(ui64 cycles);
TDuration CyclesToDuration(ui64 cycles);
ui64 DurationToCycles(TDuration duration);
// NBS-3400 - CyclesToDuration and DurationToCycles may overflow for long running events
TDuration CyclesToDurationSafe(ui64 cycles);
ui64 DurationToCyclesSafe(TDuration duration);
class TPrecisionTimer {
private:
ui64 Start = 0;
public:
TPrecisionTimer();
ui64 GetCycleCount() const;
};
TString FormatCycles(ui64 cycles);
class TFormattedPrecisionTimer {
private:
ui64 Start;
const char* Message;
IOutputStream* Out;
public:
TFormattedPrecisionTimer(const char* message = "took ", IOutputStream* out = &Cout);
~TFormattedPrecisionTimer();
};
class TFuncTimer {
public:
TFuncTimer(const char* func);
~TFuncTimer();
private:
const TInstant Start_;
const char* Func_;
};
class TFakeTimer {
public:
inline TFakeTimer(const char* = nullptr) noexcept {
}
};
#if defined(WITH_DEBUG)
#define TDebugTimer TFuncTimer
#else
#define TDebugTimer TFakeTimer
#endif
class TTimeLogger {
private:
TString Message;
bool Verbose;
bool OK;
time_t Begin;
ui64 BeginCycles;
public:
TTimeLogger(const TString& message, bool verbose = true);
~TTimeLogger();
void SetOK();
double ElapsedTime() const;
};
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