> On Sun, 2002-03-10 at 15:29, Andreas Jaeger wrote:
>
>> Please add the procinterface also! I've found it today (for 2.4.18)
>> and it's much easier to use with existing programs.
>
> I agree and I really like the proc-interface. There is something uber
> cool about:
>
> cat 1 > /proc/pid/affinity
I agree.
> I have a patch for 2.5.6 for proc-based affinity interface here:
>
> http://www.kernel.org/pub/linux/kernel/people/rml/cpu-affinity/v2.5/cpu-affinity-proc-rml-2.5.6-1.patch
>
> I suspect, however, that despite both patches being small we really only
> want to pick and standardize on one. The syscall interface has two main
> things going for it against a proc-based implementation: it is faster
> and /proc may not be mounted. The masses have spoken on this issue.
>
> Note you can use the syscall interface with existing programs, too.
> Just write a program to take in a pid and mask and call
> sched_set_affinity.
What I need at the moment is a wrapper - and you can do it two ways:
$ run_with_affinity 1 program arguments...
$ (cat 1 > /proc/self/affinity; program arguments...)
The second one is much easier coded ;-)
>> Please add it for all archs - this is not only interesting for x86,
>
> I'll send Linus the patch for other arches if/when he accepts this patch
> - I have no problem with that.
Thanks,
Andreas
--
Andreas Jaeger
SuSE Labs aj@suse.de
private aj@arthur.inka.de
http://www.suse.de/~aj
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