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[Opal] Re: Enabling Parallel Computing on OPAL-T

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  • From: Andreas Adelmann <andreas.adelmann AT>
  • To: Norman Huang <norman-huang AT>
  • Cc: opal AT, Yi-Nong Rao <raoyn AT>, Rick Bartman <krab AT>, Thomas Planche <tplanche AT>, Frederick Jones <fwj AT>
  • Subject: [Opal] Re: Enabling Parallel Computing on OPAL-T
  • Date: Sat, 26 Nov 2011 08:45:35 +0100
  • List-archive: <>
  • List-id: The OPAL Discussion Forum <>

Hello Norman the input files is just fine, I made one small change not related to your problem. 

Can you send me the std-output of your run? On which cluster do you run?

Are you sure that MPI is installed properly i.e. can you run a canonical MPI test - for example 
calculating Pi - (this test comes with every MPI distribution).

You should also contact Fred Jones, I remember having similar problems when I was at Triumf 
in the beginning of this year. 

Cheers Andreas 

Description: Binary data

On Nov 26, 2011, at 2:54 AM, Norman Huang wrote:

Hi Andreas,

I'm trying to do space charge calculations using parallel computing on OPAL-T, but 
it appears only 1 core is being used.

This is my fieldsolver parameters:

Fs1:FIELDSOLVER, FSTYPE=fft, MX=32, MY=32, MT=2024,
PARFFTX=true, PARFFTY=true, PARFFTT=false,
BCFFTX=open, BCFFTY=open, BCFFTT=open,

Command used to run the test '': mpirun -np 8 opal --commlib mpi

When it's being run, all 8 cpu cores are active, but only one is doing the
calculations. Furthermore, this run actually took an hour more than a previous
run using a single core. 

Am I missing some configurations?


Dr. sc. math. Andreas (Andy) Adelmann
Staff Scientist
Paul Scherrer Institut WLGB/132 CH-5232 Villigen PSI
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the more profound will be its consequences.
Leon Lederman 

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