In the machinefile, add for each node with M cpus: myhost@mydomain slots=N cpus_allowed=<set>, <set> being the subset of 0..M-1 in some yours-to-decide format and with yours-to-decide default values.
Best Regards, Alexander Shaposhnikov On Wednesday 29 November 2006 06:16, Jeff Squyres wrote: > There is not, right now. However, this is mainly because back when I > implemented the processor affinity stuff in OMPI (well over a year > ago), no one had any opinions on exactly what interface to expose to > the use. :-) > > So right now there's only this lame control: > > http://www.open-mpi.org/faq/?category=tuning#using-paffinity > > I am not opposed to implementing more flexible processor affinity > controls, but the Big Discussion over the past few months is exactly > how to expose it to the end user. There have been several formats > proposed (e.g., mpirun command line parameters, magic MPI attributes, > MCA parameters, etc.), but nothing that has been "good" and "right". > So here's the time to chime in -- anyone have any opinions on this? > > On Nov 25, 2006, at 9:31 AM, shap...@isp.nsc.ru wrote: > > Hello, > > i cant figure out, is there a way with open-mpi to bind all > > threads on a given node to a specified subset of CPUs. > > For example, on a multi-socket multi-core machine, i want to use > > only a single core on each CPU. > > Thank You. > > > > Best Regards, > > Alexander Shaposhnikov > > _______________________________________________ > > users mailing list > > us...@open-mpi.org > > http://www.open-mpi.org/mailman/listinfo.cgi/users
