Thanks Brice, Right now, the user facing issue is that numa binding is requested, and there is no numa, so mpirun aborts.
But you have a good point, we could simply not bind at all in this case instead of aborting, since the numa node would have been the full machine, which would have been a noop. Fwiw, - the default binding policy was changed from to socket to numa (for better out of the box perfs on KNL iirc) - in btl/sm we malloc(0) when there is no numa, which causes some memory corruption. The fix is trivial and i will push it tomorrow Cheers, Gilles Brice Goglin <brice.gog...@inria.fr> wrote: > > >Le 05/01/2017 07:07, Gilles Gouaillardet a écrit : >> Brice, >> >> things would be much easier if there were an HWLOC_OBJ_NODE object in >> the topology. >> >> could you please consider backporting the relevant changes from master >> into the v1.11 branch ? >> >> Cheers, >> >> Gilles > >Hello >Unfortunately, I can't backport this to 1.x. This is very intrusive and >would break other things. >However, what problem are you actually seeing? They are no NUMA node in >hwloc 1.x when the machine isn't NUMA (or when there's no NUMA support >in the operating system but that's very unlikely). hwloc master would >show a single NUMA node that is equivalent to the entire machine, so >binding would be a noop. >Regards >Brice > >_______________________________________________ >devel mailing list >devel@lists.open-mpi.org >https://rfd.newmexicoconsortium.org/mailman/listinfo/devel _______________________________________________ devel mailing list devel@lists.open-mpi.org https://rfd.newmexicoconsortium.org/mailman/listinfo/devel
