prof_time Class Reference

This utility class is to help in doing detailed profiling of code. It is uses the unix itimer system (see man getitimer). It is assumed that all 3 of the hi-res timers are running. They should be because JANA starts them all at program start up. More...

#include <prof_time.h>

Classes
class	time_diffs

Public Member Functions
	prof_time ()
virtual	~prof_time ()
void	GetTime (void)
void	TimeDiffNow (std::map< std::string, time_diffs > &prof_times, std::string what)
void	TimeDiff (const prof_time &other_time, double &tdiff_real, double &tdiff_virt, double &tdiff_prof)

Public Attributes
struct itimerval	real_tmr
struct itimerval	virt_tmr
struct itimerval	prof_tmr

Detailed Description

This utility class is to help in doing detailed profiling of code. It is uses the unix itimer system (see man getitimer). It is assumed that all 3 of the hi-res timers are running. They should be because JANA starts them all at program start up.

To use this, one would want to do something like the following:

Declare a container to hold timing info outside of evnt loop

static map<string, prof_time::time_diffs> prof_times;

Then, wrap the block of code you want to time with a prof_time variable and a call to its TimeDiffNow(...) method.

prof_time start_time;

<... do something ...>

start_time.TimeDiffNow(prof_times, "My code block 1");

Note that the current time is copied into the prof_time variable upon it's creation. To force the recording of a time at a position other than the line creating the object, call it's GetTime() method.

This system is designed to check all 3 timers. This might add a little more overhead than simply checking one timer, but at least this way this can be used for a broad range of purposes.

Definition at line 44 of file prof_time.h.

Constructor & Destructor Documentation

prof_time::prof_time ( )

inline

Definition at line 60 of file prof_time.h.

References GetTime().

virtual prof_time::~prof_time ( )

inlinevirtual

Definition at line 64 of file prof_time.h.

Member Function Documentation

void prof_time::GetTime ( void  )

inline

Definition at line 68 of file prof_time.h.

References prof_tmr, real_tmr, and virt_tmr.

Referenced by prof_time().

void prof_time::TimeDiff ( const prof_time &  other_time, double &  tdiff_real, double &  tdiff_virt, double &  tdiff_prof  )

inline

Definition at line 93 of file prof_time.h.

References prof_tmr, real_tmr, and virt_tmr.

Referenced by TimeDiffNow().

void prof_time::TimeDiffNow ( std::map< std::string, time_diffs > &  prof_times, std::string  what  )

inline

Definition at line 76 of file prof_time.h.

References prof_time::time_diffs::prof, prof_time::time_diffs::real, TimeDiff(), and prof_time::time_diffs::virt.

Referenced by DTrackFitter::FindHitsAndFitTrack(), DTrackFitter::FitTrack(), and DTrackFitter::Reset().

Member Data Documentation

struct itimerval prof_time::prof_tmr

Definition at line 117 of file prof_time.h.

Referenced by GetTime(), and TimeDiff().

struct itimerval prof_time::real_tmr

Definition at line 115 of file prof_time.h.

Referenced by GetTime(), and TimeDiff().

struct itimerval prof_time::virt_tmr

Definition at line 116 of file prof_time.h.

Referenced by GetTime(), and TimeDiff().

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

• prof_time.h