[petsc-dev] testexamples using too many processes

Lisandro Dalcin dalcinl at gmail.com
Mon Mar 23 11:12:11 CDT 2015

On 23 March 2015 at 18:27, Satish Balay <balay at mcs.anl.gov> wrote:
> nemesis has this performance degradation issue [when oversubscribing
> cpu-cores] - so --download-mpich defaults using
> -download-mpich-device=ch3:sock [this mode doesn't not have
> performance degradation]

Well, the thing is I always use MPI from my system package manager
(yum or brew) and they are configured with nemesis.

Lisandro Dalcin
Research Scientist
Computer, Electrical and Mathematical Sciences & Engineering (CEMSE)
Numerical Porous Media Center (NumPor)
King Abdullah University of Science and Technology (KAUST)

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