CTest with MPI

[Zachary 42!]

Hi everyone,

I am trying to run some MPI tests and I don’t see on the deal.II website how to use ctest for running MPI programs. I just saw how the output file needs to indicate the number of processors used in the test so numdiff works correctly. How do you use ctest for running a MPI test program?

Thank you,

Zachary Streeter

[Wolfgang Bangerth]

On 11/13/20 1:24 PM, Zachary 42! wrote:
> I am trying to run some MPI tests and I don’t see on the deal.II website how to use ctest for running MPI programs. I just saw how the output file needs to indicate the number of processors used in the test so numdiff works correctly. How do you use ctest for running a MPI test program?

Once you create a test and an output file, you do 'make setup_tests' and
'ctest -R my_test' where my_test happens to be a test that uses MPI. Apart
from the fact that the number of processors used is encoded in the name of the
output file, there is no magic to it.

Best
W.

--
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Wolfgang Bangerth email: bang...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/

[Zachary Streeter]

Oh the test sees the number of processors from the .output files name?

[Wolfgang Bangerth]

On 11/13/20 6:02 PM, Zachary Streeter wrote:
> Oh the test sees the number of processors from the .output files name?

Yes. 'make setup_tests' figures this all out for you :-)

[Zachary Streeter]

Ahh, I don't feel bad not thinking that possibility; brilliant!

[Wolfgang Bangerth]

On 11/13/20 6:07 PM, Zachary Streeter wrote:
> Ahh, I don't feel bad not thinking that possibility; brilliant!

Matthias Maier (tamiko) gets the credit :-)