Le 18/08/2011 11:48, PULVERAIL Sébastien a écrit : > > I use logical ids, so I do this : > > > > hwloc_obj_t cpu = hwloc_get_obj_by_type(topology, > HWLOC_OBJ_PU, i); > > int err = hwloc_set_cpubind(topology, cpu->cpuset, > HWLOC_CPUBIND_THREAD); > > > > Is it correct ? >
Yes, it looks OK. This case is easy because cpu->cpuset contains a single bit (because it's a HWLOC_OBJ_PU), so there's no need to singlify it (which would have required to allocate a temporary copy with dup() before modifying with singlify). Brice > -- > > Seb > > > > *De :*hwloc-users-boun...@open-mpi.org > [mailto:hwloc-users-boun...@open-mpi.org] *De la part de* Brice Goglin > *Envoyé :* jeudi 18 août 2011 10:25 > *À :* Hardware locality user list > *Objet :* Re: [hwloc-users] Bind current thread to a specific cpu > > > > Are you talking about logical ids (the one given by hwloc) or > physical/OS ids (the one given by the OS and possibly in strange > order) ? You should avoid using physical ids, but... > > If logical, you can hwloc_get_obj_by_type() to get the corresponding > object, then use its ->cpuset. > > If physical, you just need a cpuset that contains the bit > corresponding to this id. You can use hwloc_bitmap_only(set, <id>) to > reset a (previously allocated) cpuset to nothing but this id. > > Brice > > > > Le 18/08/2011 10:10, PULVERAIL Sébastien a écrit : > > Hi, > > > > I'm looking for a function that allows to bind the current thread to a > specific cpu given by its id. > > > > I found the function hwloc_set_thread_cpubind to bind a thread to a > cpuset. > > I also found the function hwloc_bitmap_singlify to keep only one index > in the cpuset. > > But I didn't found anything to only keep the cpu I need in my cpuset... > > > Is it possible ? > > > > -- > > Seb > > > > > > _______________________________________________ > hwloc-users mailing list > hwloc-us...@open-mpi.org <mailto:hwloc-us...@open-mpi.org> > http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users > > > > > _______________________________________________ > hwloc-users mailing list > hwloc-us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users
