machdep.cpu_idle_hlt and SMP perf?
Andrew Gallatin
gallatin at cs.duke.edu
Fri Feb 3 14:53:29 PST 2006
Kris Kennaway writes:
> On Fri, Feb 03, 2006 at 05:47:32PM -0500, Andrew Gallatin wrote:
> >
> > Why dooes machdep.cpu_idle_hlt=1 drop my 10GbE network rx
> > performance by a considerable amount (7.5Gbs -> 5.5Gbs)?
>
> I don't know, but I've set this to 0 on my machines because I also
> noticed a significant performance drop on general workloads with it
> set to 1.
I think I'll follow your lead. Good thing there is a cold snap
coming ;)
Drew
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