Re: [Boost-users] [mpi] what is the equivalent of MPI_COMM_SELF?

Subject: Re: [Boost-users] [mpi] what is the equivalent of MPI_COMM_SELF?
From: Alfredo Correa (alfredo.correa_at_[hidden])
Date: 2009-08-12 16:41:22

> Do you need this regularly? I have never seen any need for this  
> before. Have you have a real need?

I just started using both MPI and Boost.MPI so I don't know, and most
of the use is only investigative.
I just found that sometimes replacing "world" by "self" can change
from parallel syncronized behavior to unsyncronized behavior very
easily, for example when debugging.

here it is an example in which just changing WORLD by SELF changes de
behavior of the program:
https://computation.llnl.gov/casc/ppf/ppf.html

But maybe you are right, maybe there is no real need and I can live
without it. I noticed that world and self (or null) are treated
asymmetrically in the Boost.MPI syntax. just that.

Alfredo