Hi Joachim,
> >> Is there a formula to calculate the number of socket connections per
> >> node (S) that an OpenMPI application needs for running (via sockets) on
> >> N nodes with P processes each? I guess something like
> >>
> >> S = P * (N-1)*P
> > I would say that S=(N-1)*P (why do you assume
Torsten Hoefler wrote:
Hi Joachim,
Is there a formula to calculate the number of socket connections per
node (S) that an OpenMPI application needs for running (via sockets) on
N nodes with P processes each? I guess something like
S = P * (N-1)*P
I would say that S=(N-1)*P (why do you assume
Hi Joachim,
> Is there a formula to calculate the number of socket connections per
> node (S) that an OpenMPI application needs for running (via sockets) on
> N nodes with P processes each? I guess something like
>
> S = P * (N-1)*P
I would say that S=(N-1)*P (why do you assume that S=O(P^2)?) i
I can't speak to the MPI layer, but for OpenRTE, each process holds one
socket open to the HNP. Each process *has* all the socket connection info
for all of the processes in its job, but I don't believe we actually open
those sockets until we attempt to communicate with that process (needs to be
ve
