wrf functions slower with more processor cores

[lucaswrf]

Hello,
I'm running WFR 4.5, something curious is happening.

When I use a configuration "mpiexec -n 12 ./wrf.exe" it takes a long time to finish the run.
However, when I use "mpiexec -n 1 ./wrf.exe" the time improves considerably.

Is there a setting that could be affecting my run?

I am running a domain with 240x440 grid points, at a resolution of 10km.

My processor has 12 cores.

Greetings,
Lucas.

 

[kwerner]

Hi Lucas,
It's difficult to say. Unfortunately this likely has something to do with your specific system. I'd recommend asking a systems administrator at your institution for guidance.