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Subject: Re: [OMPI users] Limit to number of processes on one node?
From: Prentice Bisbal (prentice_at_[hidden])
Date: 2010-03-03 12:52:44


Sorry. I meant to include that. I'm using version 1.2.8.

Ralph Castain wrote:
> It helps to have some idea what version you are talking about...
>
> On Mar 3, 2010, at 9:51 AM, Prentice Bisbal wrote:
>
>> Is there a limit on how many MPI processes can run on a single host?
>>
>> I have a user trying to test his code on the command-line on a single
>> host before running it on our cluster like so:
>>
>> mpirun -np X foo
>>
>> When he tries to run it on large number of process (X = 256, 512), the
>> program fails, and I can reproduce this with a simple "Hello, World"
>> program:
>>
>> $ mpirun -np 256 mpihello
>> mpirun noticed that job rank 0 with PID 0 on node juno.sns.ias.edu
>> exited on signal 15 (Terminated).
>> 252 additional processes aborted (not shown)
>>
>> I've done some testing and found that X <155 for this program to work.
>> Is this a bug, part of the standard, or design/implementation decision?
>>
>>
>> --
>> Prentice Bisbal
>> Linux Software Support Specialist/System Administrator
>> School of Natural Sciences
>> Institute for Advanced Study
>> Princeton, NJ
>> _______________________________________________
>> users mailing list
>> users_at_[hidden]
>> http://www.open-mpi.org/mailman/listinfo.cgi/users
>
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-- 
Prentice Bisbal
Linux Software Support Specialist/System Administrator
School of Natural Sciences
Institute for Advanced Study
Princeton, NJ