[petsc-dev] testexamples using too many processes

[Matthew Knepley]

On Mon, Mar 23, 2015 at 8:21 AM, Lisandro Dalcin <dalcinl at gmail.com> wrote:

> At least one test for DMDA executes in 32 processes. My desktop
> machine has 8 cores, my laptop just 4. Running testexamples make them
> totally unresponsive for a while. Any ideas about how to improve this?
>

It should not do that. What MPICH device do you use? Maybe try fork?

  Thanks,

     Matt


> mpiexec -n 32 ./ex36 -mx 5 -my 5 -mz 5 -nl 3 -dim 3 -cmap 1
> -da_refine_x 1 -da_refine_y 3 -da_refine_z 4
>
> --
> Lisandro Dalcin
> ============
> Research Scientist
> Computer, Electrical and Mathematical Sciences & Engineering (CEMSE)
> Numerical Porous Media Center (NumPor)
> King Abdullah University of Science and Technology (KAUST)
> http://numpor.kaust.edu.sa/
>
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>
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>



-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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