On Tue, Feb 21, 2012 at 16:37, Barry Smith <bsmith@mcs.anl.gov> wrote:

Oh, you mean using pthreads to spawn a thread that waits at blocking collective? :-)

BTW; do you really think MPI-3 will exist? Or it should exist?

I can call MPIX_Iallreduce() (and lots of other non-blocking collectives) today.