LSF: Limiting number of cores per node on with LSF?

Hello,

How do i limit the number of cores per node with the `LSFManager`?

I would normally use `-R "span[ptile=...]"` but the option seems to be ignored if passed as an option to lsf.

I am assuming it is because of the job array launching each core separately? @bjarthur would probably know :)

Thank you!