[mpich-discuss] MPI_init very slow with more than 3 nodes

[Pavan Balaji]

One thing you could try is to install mpich on a non-NFS directory such as /tmp and run a program that is also not on NFS to see if the problem persists.

You can build mpich on an NFS directory with --prefix=/tmp/mpich and then do “make install” on each machine.

Similarly for the “application”, you can run “/bin/hostname” or something similar.

  — Pavan

On Dec 3, 2013, at 12:06 PM, Antonio J. Peña <apenya at mcs.anl.gov> wrote:

> 
> Yes, it may be a good idea to look into that. Hopefully somebody in this list with NFS knowledge will give you a hint.
> 
>   Antonio
> 
> 
> On 12/03/2013 09:48 AM, Bixente BODO GOMEZ wrote:
>> I send a extract of tcpdump.  It seems that the problem is in the file attribues o locks of nfs.  I changed fstab on clients to add these options: 
>> 
>> nfsvers=3,rw,bg,noac,rsize=8192,wsize=8192 
>> 
>> but nothing has improved. 
>> 
>> "Antonio J. Peña" <apenya at mcs.anl.gov> escribió: 
>> 
>>> I don't think this is helping. Maybe tcpdump / wireshark captures could be helpful. 
>>> 
>>>   Antonio 
>>> 
>>> 
>>> On 12/02/2013 11:44 AM, Bixente BODO GOMEZ wrote: 
>>>> The attachment... 
>>>> 
>>>> 
>>>> _______________________________________________ 
>>>> discuss mailing list     discuss at mpich.org 
>>>> To manage subscription options or unsubscribe: 
>>>> https://lists.mpich.org/mailman/listinfo/discuss 
>>> 
>>> 
>>> -- 
>>> Antonio J. Peña 
>>> Postdoctoral Appointee 
>>> Mathematics and Computer Science Division 
>>> Argonne National Laboratory 
>>> 9700 South Cass Avenue, Bldg. 240, Of. 3148 
>>> Argonne, IL 60439-4847 
>>> (+1) 630-252-7928 
>>> apenya at mcs.anl.gov 
>>> www.mcs.anl.gov/~apenya 
>> 
>> 
>> 
>> 
>> _______________________________________________
>> discuss mailing list     
>> discuss at mpich.org
>> 
>> To manage subscription options or unsubscribe:
>> 
>> https://lists.mpich.org/mailman/listinfo/discuss
> 
> 
> -- 
> Antonio J. Peña
> Postdoctoral Appointee
> Mathematics and Computer Science Division
> Argonne National Laboratory
> 9700 South Cass Avenue, Bldg. 240, Of. 3148
> Argonne, IL 60439-4847
> 
> apenya at mcs.anl.gov
> www.mcs.anl.gov/~apenya
> _______________________________________________
> discuss mailing list     discuss at mpich.org
> To manage subscription options or unsubscribe:
> https://lists.mpich.org/mailman/listinfo/discuss

--
Pavan Balaji
http://www.mcs.anl.gov/~balaji