What is the differences between "-genvall" and "-envall"?

Question

When I need to pass my environment variables in my mpi job, what is the differences between "-genvall" and "-envall" options? I really cannot understand the description in man file.

Answer 1

Take a look at https://docs.par-tec.com/html/psmpi-userguide/rn01re01.html

you will see

-genvall Export all environment variables to all processes. Same as --envall.

So there is no difference.