Sorry for delay - was on travel. hwloc_base_binding_policy=none
Alternatively, you may get better performance if you bind to numa or socket levels, assuming you want one proc per socket: hwloc_base_binding_policy=socket [or numa] rmaps_base_mapping_policy=socket [or numa] HTH Ralph > On Nov 2, 2015, at 8:31 AM, Lloyd Brown <lloyd_br...@byu.edu> wrote: > > Is there an environment variable option, as well as the > openmpi-mca-params.conf to set the equivalent of "--bind-to none"? > Similar to how I can specify the environment variable > "OMPI_MCA_btl=^openib" instead of the cli param "--mca btl ^openib"? > > We're running into a situation where users have a combination of OpenMPI > and OpenMP threads, and the threads get constrained to the same > processor where the OpenMPI process was launched. As far as we can > tell, this started with v1.8.x. > > > Lloyd Brown > Systems Administrator > Fulton Supercomputing Lab > Brigham Young University > http://marylou.byu.edu <http://marylou.byu.edu/> > > On 10/01/2015 09:02 AM, Nick Papior wrote: >> You can define default mca parameters in this file: >> <prefix>/etc/openmpi-mca-params.conf >> >> 2015-10-01 16:57 GMT+02:00 Grigory Shamov <grigory.sha...@umanitoba.ca >> <mailto:grigory.sha...@umanitoba.ca> >> <mailto:grigory.sha...@umanitoba.ca <mailto:grigory.sha...@umanitoba.ca>>>: >> >> Hi All, >> >> A parhaps naive question: is it possible to set ' mpiexec —bind-to >> none ' as a system-wide default in 1.10, like, by setting an >> OMPI_xxx variable? >> >> -- >> Grigory Shamov >> Westgrid/ComputeCanada Site Lead >> University of Manitoba >> E2-588 EITC Building, >> (204) 474-9625 <tel:%28204%29%20474-9625 <tel:%28204%29%20474-9625>> >> >> >> >> _______________________________________________ >> users mailing list >> us...@open-mpi.org <mailto:us...@open-mpi.org> <mailto:us...@open-mpi.org >> <mailto:us...@open-mpi.org>> >> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users >> Link to this post: >> http://www.open-mpi.org/community/lists/users/2015/10/27764.php >> >> >> >> >> -- >> Kind regards Nick >> >> >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users >> Link to this post: >> http://www.open-mpi.org/community/lists/users/2015/10/27765.php >> > _______________________________________________ > users mailing list > us...@open-mpi.org <mailto:us...@open-mpi.org> > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > <http://www.open-mpi.org/mailman/listinfo.cgi/users> > Link to this post: > http://www.open-mpi.org/community/lists/users/2015/11/27974.php > <http://www.open-mpi.org/community/lists/users/2015/11/27974.php>
