[petsc-users] DMDA Error

[Victor Eijkhout]

On , 2020Feb20, at 02:03, Anthony Jourdon <jourdon_anthony at hotmail.fr<mailto:jourdon_anthony at hotmail.fr>> wrote:

It appears that the bug indeed comes from intel mpi 2019 and all of its updates.


Try

export I_MPI_ADJUST_ALLREDUCE=1

(Please check spelling)

For some reason the default allreduce algorithm is broken. This setting with 19.0.6 has solved many problems. Don’t use 19.0.5 or earlier at all.

Victor.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20200220/c574b8e6/attachment.html>