Re: [OMPI users] Fw: OpenMPI version 1.1

2006-06-24 Thread George Bosilca 
As your cluster have several network devices that are supported by  
Open MPI it is possible that the configure script detected the  
correct path to their libraries. Therefore, they might be included/ 
compiled by default in Open MPI. The simplest way to check is to use  
the ompi_info tool. "ompi_info | grep btl" will list all the network  
devices supported by your particular build.


If several devices (called BTL in Open MPI terms) are compiled in,  
only forcing one eth interface for the TCP BTL is not enough. You  
should specify that you want only the TCP BTL to be used, forcing  
Open MPI to unload/ignore all other available BTL. Add "--mca btl  
tcp,self" to your mpirun command and the problem should be solved.


george.

On Jun 23, 2006, at 10:22 PM, Swamy Kandadai wrote:




Dr. Swamy N. Kandadai
Certified Sr. Consulting IT Specialist
HPC Benchmark Center
System & Technology Group, Poughkeepsie, NY
Phone:( 845) 433 -8429 (8-293) Fax:(845)432-9789
sw...@us.ibm.com
http://w3.ibm.com/sales/systems/benchmarks





- Forwarded by Swamy Kandadai/Poughkeepsie/IBM on 06/23/2006  
10:21 PM

-

 Swamy
 Kandadai/Poughkee
 psie/ 
IBM   To

   us...@open-mpi.org
 06/23/2006  
09:52   cc

 PM

Subject

   OpenMPI version 1.1









Hi:

I am trying to run OpenMPI on a couple of nodes. These nodes have  
several

interfaces: eth0 (which is a GigE),
eth1 (which is a GigE with Jumbo frames enabled), IpoIB, myr0 in  
addition

to loopback (l0).

I want to use exclusively eth1 and I am running with this option:

mpirun --mca btl_tcp_if_include eth1 -machinefile hf -np 2 IMB-MPI1

where IMB-MPI1 is the Intel message passing benchmark.

Different times, it has different behaviors:

I ran on one set of nodes and I got a typical GigE behavior (around  
100

MB/s). On a different pairs of nodes
it is giving me the BW consistent with IpoIB (around 700 MB/s).

Can u help me what I am doing wrong? How can I force it to use eth1  
on all

nodes?

I just built OpenMPI with the following option:

./configure --prefix=$BINDIR  --disable-io-romio

Thanks
Swamy



Dr. Swamy N. Kandadai
Certified Sr. Consulting IT Specialist
HPC Benchmark Center
System & Technology Group, Poughkeepsie, NY
Phone:( 845) 433 -8429 (8-293) Fax:(845)432-9789
sw...@us.ibm.com
http://w3.ibm.com/sales/systems/benchmarks





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Re: [OMPI users] hostfile

2006-06-24 Thread Brian Barrett 

On Jun 21, 2006, at 11:23 AM, snoze pa wrote:

when using my nodelist I am getting following errors.. ny solution  
to this problem


[0,0,0] ORTE_ERROR_LOG: Not implemented in file rmgr_urm.c at line 177
[0,0,0] ORTE_ERROR_LOG: Not implemented in file rmgr_urm.c at line 365
mpirun: spawn failed with errno=-7


On 6/21/06, snoze pa  wrote:
Hello OpenMPI.
 I am trying ti run opnempi in parallel version but it is not  
recognizing my nodelist or hostfile.
Anyhelp how can I configure my node list. I use ssh to connent the  
nodes.

snoze


It would be useful if you included the information requested on our  
"Getting Help" page:


  http://www.open-mpi.org/community/help/

Also, it would be useful if you could run mpirun with the '-d'  
option, to include more debugging information about why the launch is  
failing.



Brian

--
  Brian Barrett
  Open MPI developer
  http://www.open-mpi.org/