Re: finding out the value of HZ from userspace

[Peter Williams]

Andi Kleen wrote:
> > These programs could (and should) use sysconfig(_SC_CLK_TCK) to find out 
> > how many ticks there are in a second so this does not constitute a good 
> > reason for USER_HZ not being equal to HZ.
>
>
> These programs are usually shell scripts that initialise some sysctls.

Which ones?  Top and ps don't appear to be scripts on my system (Red Hat 
9.0).

> It's not easy to call sysconf from there.

A small utility program would suffice.

> Also we tend to avoid breaking
> things that would fail silently instead of failing with an obvious error 
> message.  This would be such a case. Silent breakage is an extremly bad
> thing.

This is the responsibility of the authors of the programs in question 
not the kernel.

Peter
--
Dr Peter Williams, Chief Scientist                peterw@xxxxxxxxxx
Aurema Pty Limited                                Tel:+61 2 9698 2322
PO Box 305, Strawberry Hills NSW 2012, Australia  Fax:+61 2 9699 9174
79 Myrtle Street, Chippendale NSW 2008, Australia http://www.aurema.com

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