Re: sched_clock() uses are broken

[Nick Piggin]

Mike Galbraith wrote:
> On Wed, 2006-05-03 at 03:07 +1000, Nick Piggin wrote:
>
> > Other problem is that some people didn't RTFM and have started trying to
> > use it for precise accounting :(
>
>
> Are you talking about me perchance?  I don't really care about precision
> _that_ much, though I certainly do want to tighten timeslice accounting.

No, sched_clock is fine to be used in CPU scheduling choices, which are
heuristic anyway (although strictly speaking, even using it for timeslicing
within a single CPU could cause slight unfairness).

I'm talking about the update_cpu_clock() / task_struct->sched_time stuff.

--
SUSE Labs, Novell Inc.
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