[mpich-discuss] Problems running mpi application on different CPUs

[Rajeev Thakur]

Try running on smaller subsets of the machines to debug the problem. It
is possible that a process on some machine cannot connect to another
because of some firewall settings.

Rajeev

> -----Original Message-----
> From: mpich-discuss-bounces at mcs.anl.gov 
> [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of 
> Gaetano Bellanca
> Sent: Saturday, September 26, 2009 7:10 AM
> To: mpich-discuss at mcs.anl.gov
> Subject: [mpich-discuss] Problems running mpi application on 
> different CPUs
> 
> Hi,
> 
> I'm sorry but  I posted with a wrong Object my previous message!!!
> 
> I have a small cluster of
> a) 1 server: dual processor / quad core Intel(R) Xeon(R) CPU  E5345
> b) 4 clients: single processor / dual core Intel(R) Core(TM)2 
> Duo CPU E8400 connected  with a 1Gbit/s ethernet network.
> 
> I compiled mpich2-1.1.1p1 on the first system (a) and share 
> mpich on the other computers via nfs. I have mpd running as a 
> root on all the computers (ubunt 8.04 . kernel 2.6.24-24-server)
> 
> When I run my code in parallel on the first system, it works 
> correctly; the same happens running the same code  in 
> parallel on the other computers (always running the code from 
> the server). On the contrary, running the code using 
> processors from both the server and the clients at the same 
> time with the command:
> 
> mpiexec -machinefile machinefile -n 4 my_parallel_code
> 
> I receive this error message:
> 
> Fatal error in MPI_Init: Other MPI error, error stack:
> MPIR_Init_thread(394): Initialization failed
> (unknown)(): Other MPI error
> rank 3 in job 8  c1_4545   caused collective abort of all ranks
>  exit status of rank 3: return code 1
> 
> Should I use some particular flags in compilation or at run time?
> 
> Regards.
> 
> Gaetano
> 
> --
> Gaetano Bellanca - Department of Engineering - University of 
> Ferrara Via Saragat, 1 - 44100 - Ferrara - ITALY Voice 
> (VoIP): +39 0532 974809 Fax: +39 0532 974870 
> mailto:gaetano.bellanca at unife.it
> 
> L'istruzione costa? Stanno provando con l'ignoranza!
> 
>