[Trilinos-Users] [EXTERNAL] How to test scaling from a trilinos build
cary at colorado.edu
Wed Mar 24 08:05:03 MST 2021
Thanks, Chris, thanks Jonathan,
I have found these executables, and we are doing scaling studies now.
On 3/23/21 9:42 PM, Siefert, Christopher wrote:
> There are some scaling examples in trilinoscouplings/examples/scaling
> (example_Poisson.cpp and example_Poisson2D.cpp) that use the old stack
> and might do what you need.
On 3/23/21 7:48 PM, Hu, Jonathan wrote:
> 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>
> 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
> use to test scaling (to get around the uncertainties of our use of
> Thx.......John Cary
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