Re: [petsc-users] DMDA Error

Thu, 20 Feb 2020 06:47:42 -0800 


On , 2020Feb20, at 02:03, Anthony Jourdon 
<[email protected]<mailto:[email protected]>> 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.

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