Please see another ongoing thread on this list about this exact topic:
http://www.open-mpi.org/community/lists/users/2008/04/5457.php
It unfortunately has a subject of "(no subject)", so it's not obvious
that this is what the thread is about.
On Apr 23, 2008, at 12:14 PM, Ingo Josopait wrote:
> I noticed that the cpu usage of an mpi program is always at 100
> percent,
> even if the tasks are doing nothing but wait for new data to arrive.
> Is
> there an option to change this behavior, so that the tasks sleep until
> new data arrive?
>
> Why is this the default behavior, anyway? Is it really so costly to
> set
> the task asleep when it is idle?
>
> <ingo_josopait.vcf>_______________________________________________
> users mailing list
> users_at_[hidden]
> http://www.open-mpi.org/mailman/listinfo.cgi/users
--
Jeff Squyres
Cisco Systems
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