library: libCore
#include "TStopwatch.h"

TStopwatch

class description - header file - source file - inheritance tree (.pdf)

class TStopwatch : public TObject

Inheritance Chart:

TObject

TStopwatch

TMVA::Timer

    private:

      static Double_t GetCPUTime()
      static Double_t GetRealTime()

    public:

                      TStopwatch()
                      TStopwatch(const TStopwatch&)
                      ~TStopwatch()
       static TClass* Class()
                 void Continue()
                Int_t Counter() const
             Double_t CpuTime()
      virtual TClass* IsA() const
          TStopwatch& operator=(const TStopwatch&)
         virtual void Print(Option_t* option = "") const
             Double_t RealTime()
                 void Reset()
                 void ResetCpuTime(Double_t time = 0)
                 void ResetRealTime(Double_t time = 0)
         virtual void ShowMembers(TMemberInspector& insp, char* parent)
                 void Start(Bool_t reset = kTRUE)
                 void Stop()
         virtual void Streamer(TBuffer& b)
                 void StreamerNVirtual(TBuffer& b)

Data Members

    private:

                Double_t fStartRealTime  wall clock start time
                Double_t fStopRealTime   wall clock stop time
                Double_t fStartCpuTime   cpu start time
                Double_t fStopCpuTime    cpu stop time
                Double_t fTotalCpuTime   total cpu time
                Double_t fTotalRealTime  total real time
      TStopwatch::EState fState          stopwatch state
                   Int_t fCounter        number of times the stopwatch was started

    public:

      static const TStopwatch::EState kUndefined  
      static const TStopwatch::EState kStopped    
      static const TStopwatch::EState kRunning

Class Description

                                                                      
 TStopwatch                                                           
                                                                      
 Stopwatch class. This class returns the real and cpu time between    
 the start and stop events.

TStopwatch()

 Create a stopwatch and start it.

void Start(Bool_t reset)

 Start the stopwatch. If reset is kTRUE reset the stopwatch before
 starting it (including the stopwatch counter).
 Use kFALSE to continue timing after a Stop() without
 resetting the stopwatch.

void Stop()

 Stop the stopwatch.

void Continue()

 Resume a stopped stopwatch. The stopwatch continues counting from the last
 Start() onwards (this is like the laptimer function).

Double_t RealTime()

 Return the realtime passed between the start and stop events. If the
 stopwatch was still running stop it first.

Double_t CpuTime()

 Return the cputime passed between the start and stop events. If the
 stopwatch was still running stop it first.

Double_t GetRealTime()

 Private static method returning system realtime.

Double_t GetCPUTime()

 Private static method returning system CPU time.

void Print(Option_t *opt)

 Print the real and cpu time passed between the start and stop events.
 and the number of times (slices) this TStopwatch was called
 (if this number > 1). If opt="m" print out realtime in milli second
 precision. If opt="u" print out realtime in micro second precision.

TStopwatch()

Int_t Counter()

void Reset()

void ResetCpuTime(Double_t time = 0)

void ResetRealTime(Double_t time = 0)

Author: Fons Rademakers 11/10/95
Last update: root/base:$Name: $:$Id: TStopwatch.cxx,v 1.13 2006/05/18 10:46:26 brun Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *

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