This web mail archive is frozen.
This page is part of a frozen web archive of this mailing list.
You can still navigate around this archive, but know that no new mails
have been added to it since July of 2016.
Click here to be taken to the new web archives of this list; it includes all the mails that are in this frozen archive plus all new mails that have been sent to the list since it was migrated to the new archives.
Josh Aune wrote:
> I am writing up some interconnect/network debugging software that is
> centered around ompi. What is the best set of functions to use to get
> the best bandwidth and latency numbers for openmpi and why? I've been
You mean MPI functions or internal ompi functions ? For MPI functions,
it depends of what you are looking for. Send/recv is fine but it does
not show the overlap capability. You would need to do something smarter
with Isend/Irecv/Wait for that (Sandia has a nice bench that they should
release soon). You may also want to measure the penalty for unexpected
messages, the host CPU overhead and the ability to progress.
All of these metrics are measured by existing benchmarks, do you want to
write one that covers everything or something like IMB ?