From f491dce0ce7bf5fa7e816ee8e851863df4639f8c Mon Sep 17 00:00:00 2001 From: Geoffroy Lesur Date: Thu, 7 Mar 2024 09:35:05 +0100 Subject: [PATCH] add a comment on how to disable OMPiO on openmpi --- doc/source/faq.rst | 3 +++ 1 file changed, 3 insertions(+) diff --git a/doc/source/faq.rst b/doc/source/faq.rst index 9fb44e38..733f5152 100644 --- a/doc/source/faq.rst +++ b/doc/source/faq.rst @@ -57,6 +57,9 @@ How can I stop the code without loosing the current calculation? I'm doing performance measures. How do I disable all outputs in *Idefix*? Add ``-nowrite`` when you call *Idefix* executable. +I sometimes get incoherent values in my VTK files when running Idefix with OpenMPI>4, but the code seems to be running fine. + This is probably a bug ot the MPI library for some of the MPI I/O calls used by the VTK class. We recommend passing ``--mca io ^ompio`` to mpirun to avoid + this problem which seems to be a bug of the OMPIO layer of OpenMPI. Developement ------------