time_normalizer Struct Reference

A time normalizer. More...

#include <pfs_timer.h>

Public Member Functions
ulonglong	wait_to_pico (ulonglong wait) const
	Convert a wait from timer units to pico seconds. More...
ulonglong	time_to_pico (ulonglong t) const
	Convert a time from timer units to pico seconds. More...
void	to_pico (ulonglong start, ulonglong end, ulonglong *pico_start, ulonglong *pico_end, ulonglong *pico_wait) const
	Convert start / end times from timer units to pico seconds. More...
ulong	bucket_index (ulonglong t)

Static Public Member Functions
static time_normalizer *	get_idle ()
	Get a time normalizer for the statement timer. More...
static time_normalizer *	get_wait ()
static time_normalizer *	get_stage ()
static time_normalizer *	get_statement ()
static time_normalizer *	get_transaction ()

Public Attributes
ulonglong	m_v0
	Timer value at server startup. More...
ulonglong	m_factor
	Conversion factor from timer values to pico seconds. More...
ulonglong	m_bucket_timer [NUMBER_OF_BUCKETS+1]
	Histogram bucket timers, expressed in timer unit. More...

Detailed Description

A time normalizer.

A time normalizer consist of a transformation that converts raw timer values (expressed in the timer unit) to normalized values, expressed in picoseconds.

Member Function Documentation

bucket_index()

ulong time_normalizer::bucket_index

(

ulonglong

t

)

get_idle()

time_normalizer * time_normalizer::get_idle ( )

static

Get a time normalizer for the statement timer.

Returns

the normalizer for the timer

get_stage()

time_normalizer * time_normalizer::get_stage ( )

static

get_statement()

time_normalizer * time_normalizer::get_statement ( )

static

get_transaction()

time_normalizer * time_normalizer::get_transaction ( )

static

get_wait()

time_normalizer * time_normalizer::get_wait ( )

static

time_to_pico()

ulonglong time_normalizer::time_to_pico ( ulonglong  t ) const

inline

Convert a time from timer units to pico seconds.

Parameters

t	a time, expressed in timer units

Returns

the time, expressed in pico seconds

to_pico()

void time_normalizer::to_pico	(	ulonglong	start,
		ulonglong	end,
		ulonglong *	pico_start,
		ulonglong *	pico_end,
		ulonglong *	pico_wait
	)		const

Convert start / end times from timer units to pico seconds.

Parameters

	start	start time, expressed in timer units
	end	end time, expressed in timer units
[out]	pico_start	start time, expressed in pico seconds
[out]	pico_end	end time, expressed in pico seconds
[out]	pico_wait	wait time, expressed in pico seconds

wait_to_pico()

ulonglong time_normalizer::wait_to_pico ( ulonglong  wait ) const

inline

Convert a wait from timer units to pico seconds.

Parameters

wait	a wait, expressed in timer units

Returns

the wait, expressed in pico seconds

Member Data Documentation

m_bucket_timer

ulonglong time_normalizer::m_bucket_timer[NUMBER_OF_BUCKETS+1]

Histogram bucket timers, expressed in timer unit.

m_factor

ulonglong time_normalizer::m_factor

Conversion factor from timer values to pico seconds.

m_v0

ulonglong time_normalizer::m_v0

Timer value at server startup.

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

• storage/perfschema/pfs_timer.h
• storage/perfschema/pfs_timer.cc