Dear All,

I have parallel program written on mpi. I am able to run on openmpi environment in our Linux cluster.
I found out that it is rather slow. I have heard that it could be faster if it is run on infinipath environment where
it has lower latency.

I run my program which runs perfectly on openmpi environment first by changing the environment to
using (infinipath/core/gcc/2.1 and infinipath/ofed/2.1 in my case ) and submit my job as:

qsub -R y -pe infinipath 8 myscript.sh

where the script "myscript" contains the command:

mpirun -m $TMPDIR/machines -np $NSLOTS ./test

where test is the executable file that was produced by running my parallel program test.f90
as

mpif90 test.f90 -o test

After submitting my jobs with a given number of "Nslots", I got the error message as

/usr/local/Cluster-Apps/sge/default/spool/node103/job_scripts/4947620: line 37: mpirun: command not found

Any comments are welcome, thankx ? Do I need to change inside my mpi parallel code to run on infinipath environment ?

Regards
Yacob

----- Original Message ----
From: Andy Georgi <Andy.Georgi@zih.tu-dresden.de>
To: Open MPI Users <users@open-mpi.org>
Sent: Sunday, April 20, 2008 9:23:19 AM
Subject: Re: [OMPI users] Deci

sion map for MPI collective operations

Thanks a lot, i got it.

Andy

George Bosilca schrieb:
> You need access to the source in order to look at the decision maps.
> They are in ompi/mca/coll/tuned/coll_tuned_decision_fixed.c file.
>
> george.
>
> On Apr 19, 2008, at 3:41 AM, Andy Georgi wrote:
>
>> hello all,
>>
>> i want to measure the time needed for collective operations on a cluster
>> by using ompi 1.2.5. i read that the algorithm which is used depends on
>> msgsize and/or commsize and ompi constructs a decision map for the
>> collective on the system. now my question:
>>
>> where can i find these decision map for my system?
>>
>> i'm no sysadmin, but i hope there is a way to get this information
>> anyway ;-).
>>
>> regards,
>>
>> andy
>> --
>>
>> Dresden University of Technology
>> Center for Information Services
>> and High Performance Computing (ZIH)
>> D-01062 Dresden
>> Germany
>>
>> Phone: (+49) 351/463-38783
>> Fax: (+49) 351/463-38245
>>
>> e-mail: Andy.Georgi@zih.tu-dresden.de
>> WWW: http://www.tu-dresden.de/zih
>> _______________________________________________
>> users mailing list
>> users@open-mpi.org
>> http://www.open-mpi.org/mailman/listinfo.cgi/users
>
>
> ------------------------------------------------------------------------
>
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--

Dresden University of Technology
Center for Information Services
and High Performance Computing (ZIH)
D-01062 Dresden
Germany

Phone: (+49) 351/463-38783
Fax: (+49) 351/463-38245

e-mail: Andy.Georgi@zih.tu-dresden.de
WWW: http://www.tu-dresden.de/zih
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