[petsc-users] speedup for TS solver using DMDA

[Katy Ghantous]

Hi,
I am using DMDA to run in parallel TS to solves a set of N equations. I am
using DMDAGetCorners in the RHSfunction with setting the stencil size at 2
to solve a set of coupled ODEs on 30 cores.
The machine has 32 cores (2 physical CPUs with 2x8 core each with speed of
3.4Ghz per core).
However, mpiexec with more than one core is showing no speedup.
Also at the configuring/testing stage for petsc on that machine, there was
no speedup and it only reported one node.
Is there somehting wrong with how i configured petsc or is the approach
inappropriate for the machine?
I am not sure what files (or sections of the code) you would need to be
able to answer my question.

Thank you!
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