bench.c File Reference

Bench library initialization. More...

Functions
void	bench_init (void)
	Initialize benchmarking library. More...
cycles_t	bench_tscoverhead (void)
cycles_t	bench_time_diff (cycles_t tsc_start, cycles_t tsc_end)
	computes the differences of two time stamps with respecting overflow More...
cycles_t	bench_avg (cycles_t *array, size_t len)
	Compute averages. More...
cycles_t	bench_variance (cycles_t *array, size_t len)
	Compute variance. More...
void	bench_stddev (cycles_t *array, size_t len, uint8_t correction, cycles_t *ret_avg, cycles_t *ret_stddev)
	computes the standard deviation s^2 of the sample data More...
cycles_t	bench_min (cycles_t *array, size_t len)
	Compute minimum. More...
cycles_t	bench_max (cycles_t *array, size_t len)
	Compute maximum. More...

Detailed Description

Bench library initialization.

Function Documentation

cycles_t bench_avg	(	cycles_t *	array,
		size_t	len
	)

Compute averages.

If certain datapoints should be ignored, they should be marked with #BENCH_IGNORE_WATERMARK

void bench_init

(

void

)

Initialize benchmarking library.

cycles_t bench_max	(	cycles_t *	array,
		size_t	len
	)

Compute maximum.

If certain datapoints should be ignored, they should be marked with #BENCH_IGNORE_WATERMARK

cycles_t bench_min	(	cycles_t *	array,
		size_t	len
	)

Compute minimum.

If certain datapoints should be ignored, they should be marked with #BENCH_IGNORE_WATERMARK

void bench_stddev	(	cycles_t *	array,
		size_t	len,
		uint8_t	correction,
		cycles_t *	ret_avg,
		cycles_t *	ret_stddev
	)

computes the standard deviation s^2 of the sample data

Parameters

array	array of data to analyze
len	size of the array
correction	apply Bessel's correction (using N-1 instead of N)
ret_avg	returns the average of the sample
ret_stddev	returns the standard deviation squared of the sample

discard some initiali observations

cycles_t bench_time_diff	(	cycles_t	tsc_start,
		cycles_t	tsc_end
	)

computes the differences of two time stamps with respecting overflow

This function also accounts for the overhead when taking timestamps

Parameters

tsc_start	timestamp of start
tsc_end	timestamp of end

Returns

elaped cycles

cycles_t bench_tscoverhead

(

void

)

Return the measured tsc overhead

cycles_t bench_variance	(	cycles_t *	array,
		size_t	len
	)

Compute variance.

If certain datapoints should be ignored, they should be marked with #BENCH_IGNORE_WATERMARK