[Trilinos-Users] [EXTERNAL] How to test scaling from a trilinos build

Hu, Jonathan jhu at sandia.gov
Tue Mar 23 18:48:12 MST 2021

Hi John,

	ML has a 2D Poisson driver in ml/examples/BasicExamples/ml_preconditioner.cpp.  The cmake target should be either "ML_preconditioner" or "ML_preconditioner.exe".  There's a really similar one in ml/examples/XML/ml_XML.cpp that you can drive with an XML deck.  Is this what you're after?


On 3/23/21, 5:47 PM, "Trilinos-Users on behalf of John Cary" <trilinos-users-bounces at trilinos.org on behalf of cary at colorado.edu> wrote:

    We are still using the old stack: ML, Epetra, ...

    When we run a simple Poisson solve on our cluster (32 cores/node), we
    see parallel efficiency drop to 4% on one node with 32 cores.  So we
    naturally believe we are doing something wrong.

    Does trilinos come with a simple Poisson-solve executable that we could
    use to test scaling (to get around the uncertainties of our use of 

    Thx.......John Cary

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