Hi,
One more comment. Regarding the IB Mcast and its usage. The key advantage of IB
Mcast (enabled with hpcx+hcoll when user utilizes MPI_Bcast collective call) is
nearly constant scaling. So, it gives most advantage when many multiple nodes
are used at the same time for a collective. By default
On 3/21/19 5:31 PM, George Bosilca wrote:
I am not sure I understand your question, a bcast is a collective
operation that must be posted by all participants. Independently at
what level the bcast is serviced, if some of the participants have not
posted their participation to the collective, o
Josh and Valentin, thanks a lot for your answers! Your understanding of
my case is essentially correct, but let me briefly refine.
In the case at hand I am running a 3D solver, which computes on grids
with at least 26-neighbors. But that also depends on the grid refinement
etc, so there could
A third release candidate for the Open MPI v4.0.1 release is posted at
https://www.open-mpi.org/software/ompi/v4.0/
Fixes since 4.0.1rc2 include
- Add acquire semantics to an Open MPI internal lock acquire function.
Our goal is to release 4.0.1 by the end of March, so any testing is
appreciated.
