Messages in this thread | | | Subject | Re: [PATCH] syscall interface for cpu affinity | From | Andreas Jaeger <> | Date | Sun, 10 Mar 2002 22:03:02 +0100 |
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Robert Love <rml@tech9.net> writes:
> 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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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