Intercepting MPI calls on a Fortran code

[xaguilar]

Hi guys,

I'm trying to analyse a Fortran code running on a Cray machine with MI250Xs. I compiled omnitrace from scratch with MPI support. When I instrument the application binary, I use omnitrace-instrument with the --mpi flag, and omnitrace as well detects the MPI_Finalize so it enables MPI instrumentation. However, when I run the application I don't get any info on the MPI calls. Not in the trace and not in the profiles.

I checked and the application binary has MPI symbols, so any ideas what can be going on here? I tried with one of the OSU benchmarks and then I get the MPI calls instrumented there, but not with this fortran code. Any ideas?

Thanks a lot in advance!