Re: lmbench ctxsw regression with CFS

Ingo Molnar
2007-08-02T07:20:15Z

* Nick Piggin <npiggin@suse.de> wrote:

> > One thing to check out is whether the lmbench numbers are "correct".
> > Especially on SMP systems, the lmbench numbers are actually *best*
> > when the two processes run on the same CPU, even though that's not
> > really at all the best scheduling - it's just that it artificially
> > improves lmbench numbers because of the close cache affinity for the
> > pipe data structures.
>
> Yes, I bound them to a single core.

could you send me the .config you used?

Ingo