Subject: Re: rnd device
To: Steve Woodford <>
From: Jason R Thorpe <>
List: tech-kern
Date: 07/28/2000 07:57:39
On Fri, Jul 28, 2000 at 08:15:42AM +0100, Steve Woodford wrote:

 > How much bloat does the rnd(4) device add to the kernel? What sort of
 > performance hit does it cause?

dr-evil:thorpej 5$ size rnd*.o
text    data    bss     dec     hex     filename
3348    80      0       3428    d64     rnd.o
1184    0       0       1184    4a0     rndpool.o
dr-evil:thorpej 6$

That's i386.

Re. performance hit -- Data is queued to be entered into the entropy
pool in interrupt routines, but the expensive operating of stirring
the entropy into the pool is deferred until later to minimize the
impact on system performance.

        -- Jason R. Thorpe <>