Re: sched_clock() uses are broken

[Nick Piggin]

Andi Kleen wrote:
> On Tuesday 02 May 2006 18:54, Christopher Friesen wrote:
>
> > Andi Kleen wrote:
> >
> >
> > > Agreed it's a problem, but probably a small one. At worst you'll get
> > > a small scheduling hickup every half year, which should be hardly 
> > > that big an issue.
> >
> > Presumably this would be bad for soft-realtime embedded things.  Set-top 
> > boxes, etc.
>
>
> SCHED_RR/FIFO are not affected. AFAIK it's only used by the interactivity
> detector in the normal scheduler. Worst case that happens is that a 
> process is not detected to be interactive when it should once, which
> gives it only a small penalty. On the next time slice everything will be ok again.

Other problem is that some people didn't RTFM and have started trying to
use it for precise accounting :(

--
SUSE Labs, Novell Inc.
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