SW Class Reference

#include "sw.h"

Public Member Functions
	SW (std::string description)
void	start (void)
void	stop (void)
	~SW ()
	SW (std::string description)
void	start (void)
void	stop (void)
	~SW ()

Detailed Description

Examples

cpp50Example_main.cpp, and cpp55Example_main.cpp.

Constructor & Destructor Documentation

SW() [1/2]

SW::SW ( std::string description )

inline

   : n (0), sum (0), sum2 (0), min ((uint64_t) -1), max (0), description (description)
   {
 psp_timeSetup ();
   }

References psp_timeSetup().

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~SW() [1/2]

SW::~SW ( )

inline

   {
 using namespace std;
 double units = 1000000000;
 const double average = n ? (double) sum / units / n : 0.0;
 const double sigma = n > 1 ? ((double) sum2 / units / units - (double) sum / units / n * ((double) sum / units)) / (n - 1) : 0.0;
 const double sigma_corrected = sigma > 0.0 ? sigma : 0.0;
 const double standardDeviation = psp_mathDoubleSqrt (sigma_corrected);
 const double minimum = n ? (double) min / units : 0.0;
 const double maximum = (double) max / units;
 const double total = (double) sum / units;
  
   cout << fixed << setprecision(9);
   cout << (double) average << " +/- " << standardDeviation << " [" << minimum << ", " << maximum << "], n: " << setw(5) << n
   << ", total: " << total << ", " << description << endl;
   }

References psp_mathDoubleSqrt().

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SW() [2/2]

SW::SW ( std::string description )

inline

   : n (0), sum (0), sum2 (0), m_min ((uint64_t) -1), m_max (0), description (description)
   {
 psp_timeSetup ();
   }

References psp_timeSetup().

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~SW() [2/2]

SW::~SW ( )

inline

   {
 using namespace std;
 double units = 1000000000;
 const double average = n ? (double) sum / units / n : 0.0;
 const double standardDeviation =
   n > 2 ? psp_mathDoubleSqrt (((double) sum2 / units / units - (double) sum / units * sum / units / n) / (n - 1)) : 0.0;
 const double m_minimum = n ? (double) m_min / units : 0.0;
 const double m_maximum = (double) m_max / units;
 const double total = (double) sum / units;
  
 if (n > 0)
   {
   cout << fixed << setprecision(9);
   cout << (double) average << " +/- " << standardDeviation << " [" << m_minimum << ", " << m_maximum << "], n: " << setw(4) << n
   << ", total: " << total << ", " << description << endl;
   }
   }

References psp_mathDoubleSqrt().

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Member Function Documentation

start() [1/2]

void SW::start ( void )

inline

Examples

cpp50Example_main.cpp, and cpp55Example_main.cpp.

   {
   stamp = psp_timeMeasureNanoSecs ();
   }

References psp_timeMeasureNanoSecs().

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start() [2/2]

void SW::start ( void )

inline

   {
   stamp = psp_timeMeasureNanoSecs ();
   }

References psp_timeMeasureNanoSecs().

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stop() [1/2]

void SW::stop ( void )

inline

Examples

cpp50Example_main.cpp, and cpp55Example_main.cpp.

   {
 const uint64_t measurement = psp_timeMeasureNanoSecs () - stamp;
   n++;
 if (measurement > max)
   {
   max = measurement;
   }
 if (measurement < min)
   {
   min = measurement;
   }
   sum += measurement;
   sum2 += measurement * measurement;
   }

References psp_timeMeasureNanoSecs().

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stop() [2/2]

void SW::stop ( void )

inline

   {
 const uint64_t measurement = psp_timeMeasureNanoSecs () - stamp;
   n++;
 if (measurement > m_max)
   {
   m_max = measurement;
   }
 if (measurement < m_min)
   {
   m_min = measurement;
   }
   sum += measurement;
   sum2 += measurement * measurement;
   }

References psp_timeMeasureNanoSecs().

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The documentation for this class was generated from the following file:

• 50_perf_cpp/sw.h