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

Siefert, Christopher csiefer at sandia.gov
Tue Mar 23 20:42:00 MST 2021


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.

From: Trilinos-Users <trilinos-users-bounces at trilinos.org> on behalf of John Cary <cary at colorado.edu>
Sent: Tuesday, March 23, 2021 6:08 PM
To: trilinos-users at trilinos.org
Subject: [EXTERNAL] [Trilinos-Users] How to test scaling from a trilinos build

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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