Le 18/08/2013 14:51, Siddhartha Jana a écrit : > > If all the above works and does not return errors (you should > check that > your application's PID is in /dev/cpuset/socket0/tasks while running), > bind-to-core won't clash with it, at least when using a OMPI that uses > hwloc for binding (v1.5.2 or later if I remember correctly). > > My concern is that hwloc is used before the application begins > executing and so mpirun might use it to bind the application to > different cores than the ones I want them to bind to.
Ah right, they could be a problem here. MPI can bind at two different times: inside mpirun after ssh before running the actual program (this one would ignore your cpuset), later at MPI_Init inside your program (this one will ignore your cpuset only if you call MPI_Init before creating the cpuset). I'll let OMPI people give more details about this. Brice
