[petsc-users] SuperLU_dist bug with parallel symbolic factorisation

[Lawrence Mitchell]

On 22/05/18 17:11, Xiaoye S. Li wrote:
> Numerical factorization is always parallel (based on number of MPI
> tasks and OMP_NUM_THREADS you set), the issue here is only related to
> symbolic factorization (figuring out the nonzero pattern in the LU
> factors). Default setting is to use sequential symbolic factorization,
> precisely due to the ParMETIS bugs.
> (The parallel symbolic factorization needs ParMETIS ordering.)
> 
> Question for PETSc developers --
> Is PT-Scotch an installation option?  I can try to use PT_Scotch
> together with parallel symbolic factorization, which should be more
> stable than ParMETIS.

--download-ptscotch is a thing (I can't remember what other bits it
needs).

Cheers,

Lawrence