Re: sched_clock() uses are broken

Nick Piggin
2006-05-07T12:56:21Z

Russell King wrote:
> On Sun, May 07, 2006 at 10:33:41PM +1000, Nick Piggin wrote:
>

>>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).
>
>
> Except maybe if it rolls over every 178 seconds, which is my original
> point. Maybe someone could comment on my initial patch sent 5 days
> ago?

Well yes that's true. I meant the "sched_clock interface as defined". Now
there are obviously issues (including the one you raised) that makes the
sched_clock interface unreasonable to implement.

I stand by my first reply to your comment WRT the API. Seems like most of
the rest of the debate was unrelated or concerning implementation details.
kernel/sched.c patches implementing the new API would get an ack from me.

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SUSE Labs, Novell Inc.
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