shmem_finalize

[Palmer, Bruce J]

Hi,

Not sure if this is the right place for this inquiry, but I’ve got a question about the implementation of OpenSHMEM that is distributed with OpenMPI. As far as I can tell from the OpenSHMEM documentation, MPI_Finalize() and shmem_finalize are relatively independent and it should be possible to call shmem_finalize followed by MPI_Finalize without incurring an error. However, it looks like the shmem_finalize implementation is calling omni_mpi_finalize and this causes MPI_Finalize to crash. I can fix this easily in my application, but it seems like I shouldn’t have to.

Bruce

[Pritchard Jr., Howard]

HI Bruce,

 

Could you describe more what the crash is?  Does the application emit some sort of error message or is there a segmentation fault and maybe traceback?

Also which version of Open MPI/OSHMEM are you using?

 

Howard

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[Palmer, Bruce J]

It appears to complain about a call to MPI_Comm_free that is called after MPI_Finalize. I assume this is occurring because there is a call to MPI_Comm_free (or its internal equivalent) inside MPI_Finalize and this is triggered because our code has a call to shmem_finalize that is followed by a call to MPI_Finalize. My understanding is that should be allowed.

Bruce

From: 'Pritchard Jr., Howard' via Open MPI users <us...@lists.open-mpi.org>
Date: Wednesday, December 3, 2025 at 11:11 AM
To: us...@lists.open-mpi.org <us...@lists.open-mpi.org>
Subject: Re: [EXTERNAL] [OMPI users] shmem_finalize

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