[Difx-users] Issue with generating .difx files using startdifx command {External} {External}

[Adam Deller]

Hi De Wu,

As Chris mentioned, the issue is probably one of argument incompatibility
between openmpi and mpich.  Sadly, the different MPI implementations (and
even different versions of the same implementation!) seem to take fiendish
pleasure in changing the options that are supported.  There should be an
option (commented out by default) in the setup.bash/setup.csh file you
source before running DiFX that allows you to set the MPI invocation
parameters, e.g.:

#DIFX_MPIRUNOPTIONS "--mca mpi_yield_when_idle 1 --mca rmaps seq"

Unfortunately, I don't have personal experience with mpich4.*, but I'd
suggest just having a look for reference material online about what options
it supports compared to openmpi.  (As a first guess, you could always try
just setting DIFX_MPIRUNOPTIONS to not have --mca and see what happens...)

Cheers,
Adam

-- 
!=============================================================!
Prof. Adam Deller
Centre for Astrophysics & Supercomputing
Swinburne University of Technology
John St, Hawthorn VIC 3122 Australia
phone: +61 3 9214 5307
fax: +61 3 9214 8797
!=============================================================!
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listmgr.nrao.edu/pipermail/difx-users/attachments/20230519/ea071077/attachment.html>