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Subject: Re: [OMPI devel] poor btl sm latency
From: Matthias Jurenz (matthias.jurenz_at_[hidden])
Date: 2012-02-16 10:30:40


On Thursday 16 February 2012 16:21:10 Jeff Squyres wrote:
> On Feb 16, 2012, at 9:39 AM, Matthias Jurenz wrote:
> > However, the latencies are constant now but still too high:
> >
> > $ mpirun -np 2 --bind-to-core --cpus-per-proc 2 ./NPmpi_ompi1.5.5 -S -u
> > 12 -n 100000
>
> Can you run:
>
> mpirun -np 2 --bind-to-core --cpus-per-proc 2 hwloc-bind --get
>
> I want to verify that the processes are actually getting bound to the
> correct places.

Sure:
$ mpirun -np 2 --bind-to-core --cpus-per-proc 2 hwloc-bind --get
0x00000003
0x0000000c

Matthias