WRF Benchmark - different compilers - output validation

[rkuppili]

Hi,

I have built WRF using GCC compiler and ran conus 2.5 benchmark. I got results such as wrfout nc files and rsl out file. And the same way, if I built and generate WRF results using another compiler, how do I compare/ validate the results between GCC and other compiler for accuracy/ correctness? Are there any specific variable(s) should I look between two results?

Thanks
Ravi

 

[kwerner]

Ravi,
When running an identical test case using a build with two different compilers, we expect there to be some differences, and over time, those differences can grow. For a short case, like the CONUS 2.5 benchmark, the results shouldn't be that far off. I would just ensure they are somewhat similar and there isn't anything wildly different.

 

[rkuppili]

Thank you kwerner for the response.

To verify results identical conus 2.5 benchmark case, ncdiff of wrfout files output is enough ?

Thanks
Ravi

 

[kwerner]

There is a program available in the WRF/external/io_netcdf directory, called "diffwrf." I would recommend using that. For e.g.,

./diffwrf wrfout_file1 wrfout_fil2

(using the actual names and paths of the files). You can also use the ncview program to visually compare variables.