why mpiexec run uncorrectly on smp?

[Brooks Davis]

On Mon, Jun 10, 2002 at 07:04:08AM -0700, Ben Webb wrote:
> 	You have to rebuild MPICH with support for shared memory, as this
> appears to be the only way that different processes on the same machine
> are allowed to communicate with the ch_p4 device. Use something like the
> following to do this:-
> 
> ./configure --with-device=ch_p4 --with-comm=shared

I really wish mpiexec could support a stupid mode that used sockets for
all communication.  The shared mode is rather flaky on FreeBSD and since
it uses SysV shared memory it does a really bad job of cleaning up after
a crash.  At this point I want to sue mpiexec on my cluster, but I can't
get mpich with p4 and comm=shared working reliably enough to inflict it
on users.

-- Brooks