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#1 (**permalink**) 01-04-2008, 09:42 PM

Hi Experts,

HW: p610, 2 CPU
OS: AIX 5.2

Problem: We are testing threaded software and run into strange problems. If
we disable threads, the problems doesn't occur anymore.
In order to find out the reason it would be helpful to run the box with one
CPU only.
The question is: How can I disable a CPU.
I tried:
# rmdev -l proc1
I can even disable both CPU in this way! How is the box running without
processors?
Anyway, after a reboot both of them are available again.
I tried it from the Service Processor Menu: CPU Deconfiguration.
But both of the CPUs are available after boot anyway.

Any hint is welcome!
Heiko

#2 (**permalink**) 01-04-2008, 09:42 PM

"Heiko Swars" <heiko.swars@ixos.de> schrieb im Newsbeitrag
news:4034bec2$0$281$4d4ebb8e@businessnews.de.uu.ne t...
> Hi Experts,
>
> HW: p610, 2 CPU
> OS: AIX 5.2
>
> Problem: We are testing threaded software and run into strange problems.
If
> we disable threads, the problems doesn't occur anymore.
> In order to find out the reason it would be helpful to run the box with
one
> CPU only.
> The question is: How can I disable a CPU.
> I tried:
> # rmdev -l proc1
> I can even disable both CPU in this way! How is the box running without
> processors?
> Anyway, after a reboot both of them are available again.
> I tried it from the Service Processor Menu: CPU Deconfiguration.
> But both of the CPUs are available after boot anyway.
>
> Any hint is welcome!
> Heiko
>
>
Hi Heiko,

the bindprocessor command might help in binding kernel threads to just one
processor.
# man bindprocessor

HTH,
Andreas

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