random.c File Reference

Random number support. More...

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Functions
f64	clib_chisquare (u64 *values)
	Compute the X2 test statistic for a vector of counts. More...

Variables
u32	standalone_random_default_seed = 1
	Default random seed for standalone version of library. More...

Detailed Description

Random number support.

Definition in file random.c.

Function Documentation

clib_chisquare()

f64 clib_chisquare

(

u64 *

values

)

Compute the X2 test statistic for a vector of counts.

Each value element corresponds to a histogram bucket.

Typical use-case: test the hypothesis that a set of octets are uniformly distributed (aka random).

In a 1-dimensional use-case, the result should be compared with the critical value from chi square tables with vec_len(values) - 1 degrees of freedom.

Parameters

[in]

values

vector of histogram bucket values

Returns

d - Pearson's X2 test statistic

Definition at line 65 of file random.c.

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Variable Documentation

standalone_random_default_seed

u32 standalone_random_default_seed = 1

Default random seed for standalone version of library.

Value can be overridden by platform code from e.g. machine's clock count register.

Definition at line 47 of file random.c.