[mvapich-discuss] IB benchmarks that are a bit strange

[Dhabaleswar Panda]

What kind of platforms you are using - Opteron NUMA or Intel? Are the two
systems homogeneous in terms of processor speed and memory speed? Do the
two systems have identical NICs - hw and firmware? Such information will
help to understand this problem better.

DK

On Sun, 16 Mar 2008, Brian Budge wrote:

> Hi all -
>
> I am running the osu_bw bandwidth test on my small cluster.  I'm
> seeing some slightly strange behavior:  Let's say I have nodes 0 and
> 1.  When I launch the bw test from node 0 and run the test on 0 and 1,
> I see a max bandwidth of 650 MB/s.  However, when I run from node 1
> and run the test on 0 and 1, I see a max bandwidth of close to 850
> MB/s.  Does anyone know how I might diagnose/fix this issue?  Has
> anyone seen it before?
>
> Thanks,
>   Brian
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