Hi,
I am trying to run OpenACC directives on an in-house solver, I have a problem with the halo exchange updates I am using Nvidia SDK HPC version 22.3 with managed flag.
In the function below when I add the OpenACC directives and then compute the updates makes the codes so slow.
When adding the Pragmas for porting the mpi communication to GPU as seen below it’s not doing nothing and the performance is still the same.
Is this because I am using managed flag so it’s not working this way? or I am missing something?