The 1.8 series automatically binds, so I suspect you are getting some 
cross-interference. You might try adding —bind-to none to your cmd line.

Or you could just let OMPI bind you to core anyway.


> On May 11, 2015, at 9:26 PM, Chaitra Kumar <chaitragku...@gmail.com> wrote:
> 
> Hi Jeff,
> 
> Thanks for your reply. 
> The code works without any errors on MVAPICH2.  Using openMPI am getting 
> segmentation fault. I found in the older versions of openMPI we can enable 
> libnuma support by using the flag '--with-libnuma'.   I am using openMPI 
> 1.8.1.  Is there an option to configure latest version of openMPI with 
> libnuma?  I am trying to bind processes to core using the function 
> numa_sched_setaffinity'.
> 
> Regards,
> Chaitra
> 
> On Mon, May 11, 2015 at 10:00 PM, Jeff Squyres (jsquyres) <jsquy...@cisco.com 
> <mailto:jsquy...@cisco.com>> wrote:
> Can you provide a bit more detail?  Is the seg fault in your code or in Open 
> MPI?
> 
> Note that Open MPI uses hwloc (which likely uses libnuma) internally, too.
> 
> 
> 
> > On May 11, 2015, at 2:17 AM, Chaitra Kumar <chaitragku...@gmail.com 
> > <mailto:chaitragku...@gmail.com>> wrote:
> >
> > Hi Team,
> >
> > I am trying to test an application with libnuma on openmpi 1.8.1.  The code 
> > compiles, but at runtime am getting libnuma warning and it dies with 
> > segmentation fault.
> >
> > libnuma: Warning: cpu argument 8 is out of range
> >
> > --------------------------------------------------------------------------
> > mpirun noticed that process rank 1 with PID 62744 on node test-1 exited on 
> > signal 11 (Segmentation fault).
> > --------------------------------------------------------------------------
> >
> >
> > System information:
> > RHEL 6.6
> > GCC 4.4.7
> > open-mpi 1.8.1
> >
> > This code works perfectly on MVAPICH2.
> >
> > How can I enable libnuma on openmpi?
> >
> > Any help is greatly appreciated.
> >
> > Regards,
> > Chaitra
> >
> >
> >
> >
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> 
> 
> --
> Jeff Squyres
> jsquy...@cisco.com <mailto:jsquy...@cisco.com>
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