options IPI_PREEMPTION and PREEMPTION in 7.0 AMD64

Abdullah Ibn Hamad Al-Marri almarrie at gmail.com
Fri Jun 29 15:20:13 UTC 2007


On 6/25/07, Attilio Rao <attilio at freebsd.org> wrote:
> Abdullah Ibn Hamad Al-Marri wrote:
> > Hello,
> >
> > I run FreeBSD 7.0 AMD64 and powered by C2D with 2 GB of ram.
> >
> > options  PREEMPTION in the kernel, but in NOTES it says I can use
> > IPI_PREEMPTION to make the kernel make the other running threads to
> > run in the other core.
> >
> > So the question is, did you guys try it with ULE 2? shall I keep both
> > PREEMPTION and  IPI_PREEMPTION in the kernel file?
>
> IPI_PREEMPTION and PREEMPTION are only marginally linked, and you need
> to use both with ULE.
>
> Thanks,
> Attilio

Adding  IPI_PREEMPTION in the kernel didn't make my Intel C2D 6600
which runs 7.0 AMD64 busy as before, so I removed, and now MySQL runs
fatser after hashing it out, maybe this is need for Intel C2Q or 8
cores at least?


-- 
Regards,

-Abdullah Ibn Hamad Al-Marri
Arab Portal
http://www.WeArab.Net/


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