Re: Scheduler Cleanup

Mike Kravetz (kravetz@us.ibm.com)
Wed, 5 Dec 2001 15:46:18 -0800

On Wed, Dec 05, 2001 at 03:44:42PM -0800, Davide Libenzi wrote:
> Anyway me too have verified an increased latency with sched_yield() test
> and next days I'm going to try the real one with the cycle counter
> sampler.
> I've a suspect, but i've to see the disassembly of schedule() before
> talking :)

One thing to note is that possible acquisition of the runqueue
lock was reintroduced in sys_sched_yield(). From looking at
the code, it seems the purpose was to ?add fairness? in the case
of multiple yielders. Is that correct Ingo?

-- 
Mike
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