PHTimer2 Class Reference

Class to measure the time spent by a code block. More...

#include </dev/shm/kenichi/update-github-e1039-doc/e1039-core/framework/phool/PHTimer2.h>

Public Member Functions
	PHTimer2 (const std::string &name="Generic Timer")
virtual	~PHTimer2 ()
void	set_name (const std::string &name)
std::string	get_name () const
double	get_accumulated_time () const
unsigned int	get_ncycle () const
double	get_time_per_cycle () const
void	reset ()
void	stop ()
void	restart ()
void	reset_and_start ()
void	print_stat (std::string header=" Timer2:", std::ostream &os=std::cout) const
void	test (unsigned int time_msec, std::ostream &os=std::cout)
	Test this class by waiting for a given time (in ms). More...

Protected Member Functions
double	elapsed () const
	In millisecond. More...
int	get_clock_time (timespec *tp)

Detailed Description

Class to measure the time spent by a code block.

It is a new (2nd) version of PHTimer. PHTimer was found to have two problems as of 2022-05-13:

• It breaks the pthread mutex (i.e. pthread_mutex_unlock() fails), probably because PHTimer uses the assembly call.
• The measured time is longer than the actual time by 30-80%, probably because the CPU frequency is changing.

Definition at line 16 of file PHTimer2.h.

Constructor & Destructor Documentation

PHTimer2()

PHTimer2::PHTimer2

(

const std::string &

name = "Generic Timer"

)

Definition at line 7 of file PHTimer2.cc.

~PHTimer2()

PHTimer2::~PHTimer2 ( )

virtual

Definition at line 16 of file PHTimer2.cc.

Member Function Documentation

elapsed()

double PHTimer2::elapsed ( void  ) const

protected

In millisecond.

Definition at line 72 of file PHTimer2.cc.

Referenced by stop().

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get_accumulated_time()

double PHTimer2::get_accumulated_time ( void  ) const

inline

Definition at line 34 of file PHTimer2.h.

Referenced by Fun4AllServer::ReadSpillTimer().

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get_clock_time()

int PHTimer2::get_clock_time ( timespec *  tp )

protected

Definition at line 82 of file PHTimer2.cc.

Referenced by restart(), and stop().

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get_name()

std::string PHTimer2::get_name ( void  ) const

inline

Definition at line 32 of file PHTimer2.h.

get_ncycle()

unsigned int PHTimer2::get_ncycle ( ) const

inline

Definition at line 35 of file PHTimer2.h.

get_time_per_cycle()

double PHTimer2::get_time_per_cycle

(

void

)

const

Definition at line 21 of file PHTimer2.cc.

Referenced by print_stat().

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print_stat()

void PHTimer2::print_stat	(	std::string	header = "  Timer2:",
		std::ostream &	os = std::cout
	)		const

Definition at line 54 of file PHTimer2.cc.

References get_time_per_cycle().

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reset()

void PHTimer2::reset

(

)

Definition at line 26 of file PHTimer2.cc.

Referenced by reset_and_start(), Fun4AllServer::ResetSpillTimer(), and test().

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reset_and_start()

void PHTimer2::reset_and_start

(

)

Definition at line 48 of file PHTimer2.cc.

References reset(), and restart().

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restart()

void PHTimer2::restart

(

)

Definition at line 42 of file PHTimer2.cc.

References get_clock_time().

Referenced by Fun4AllServer::process_event(), reset_and_start(), and test().

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set_name()

void PHTimer2::set_name ( const std::string &  name )

inline

Definition at line 31 of file PHTimer2.h.

stop()

void PHTimer2::stop

(

)

Definition at line 33 of file PHTimer2.cc.

References elapsed(), and get_clock_time().

Referenced by Fun4AllServer::process_event(), and test().

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test()

void PHTimer2::test	(	unsigned int	time_msec,
		std::ostream &	os = std::cout
	)

Test this class by waiting for a given time (in ms).

Definition at line 62 of file PHTimer2.cc.

References reset(), restart(), and stop().

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

• /dev/shm/kenichi/update-github-e1039-doc/e1039-core/framework/phool/PHTimer2.h
• /dev/shm/kenichi/update-github-e1039-doc/e1039-core/framework/phool/PHTimer2.cc