With THREAD_FUNNELED, it means that there can only be one thread in MPI at a time -- and it needs to be the same thread as the one that called MPI_INIT_THREAD.
Is that the case in your app? Also, what is your app doing at src/pcorona_main.f90:627? It is making a call to MPI, or something else? It might be useful to compile Open MPI (and/or other libraries that you're using) with -g so that you can get more meaningful stack traces upon error -- that might give some insight into where / why the failure is occurring. -- Jeff Squyres jsquy...@cisco.com ________________________________________ From: users <users-boun...@lists.open-mpi.org> on behalf of Angel de Vicente via users <users@lists.open-mpi.org> Sent: Friday, April 22, 2022 10:54 AM To: Gilles Gouaillardet via users Cc: Angel de Vicente Subject: Re: [OMPI users] Help diagnosing MPI+OpenMP application segmentation fault only when run with --bind-to none Thanks Gilles, Gilles Gouaillardet via users <users@lists.open-mpi.org> writes: > You can first double check you > MPI_Init_thread(..., MPI_THREAD_MULTIPLE, ...) my code uses "mpi_thread_funneled" and OpenMPI was compiled with MPI_THREAD_MULTIPLE support: ,---- | ompi_info | grep -i thread | Thread support: posix (MPI_THREAD_MULTIPLE: yes, OPAL support: yes, OMPI progress: no, ORTE progress: yes, Event lib: yes) | FT Checkpoint support: no (checkpoint thread: no) `---- Cheers, -- Ángel de Vicente Tel.: +34 922 605 747 Web.: http://research.iac.es/proyecto/polmag/ --------------------------------------------------------------------------------------------- AVISO LEGAL: Este mensaje puede contener información confidencial y/o privilegiada. Si usted no es el destinatario final del mismo o lo ha recibido por error, por favor notifíquelo al remitente inmediatamente. Cualquier uso no autorizadas del contenido de este mensaje está estrictamente prohibida. Más información en: https://www.iac.es/es/responsabilidad-legal DISCLAIMER: This message may contain confidential and / or privileged information. If you are not the final recipient or have received it in error, please notify the sender immediately. Any unauthorized use of the content of this message is strictly prohibited. More information: https://www.iac.es/en/disclaimer