Brice Goglin <brice.gog...@inria.fr> writes: > Is there anything to fix on the RPM side?
Nothing significant, I think. The update Fedora version needed slight adjustment for hwloc-dump-hwdata, at least. > Intel people are carrefully > working with RedHat so that hwloc is properly packaged for RHEL. I can > report bugs if needed. I can't see a recent hwloc for RHEL (e.g. in RHEL7 beta), but don't get me started on RHEL and HPC... I'd originally just rebuilt an updated RHEL6 package, but that had a load of compatibility stuff in it. In case it's useful, a clean build of the updated Fedora package for EPEL7 is under https://copr.fedorainfracloud.org/coprs/loveshack/livhpc/package/hwloc/ [Off-topic, but there's a little KNL-specific stuff in a sibling repo (el7-knl), and one or two things with avx512 support in the livhpc one.] > >> By the way, is it expected that binding will be slow on it? hwloc-bind >> is ~10 times slower (~1s) than on two-socket sandybridge, and ~3 times >> slower than on a 128-core, 16-socket system. > > Binding itself shouldn't be slower. But hwloc's topology discovery > (which is performed by hwloc-bind before actual binding) is slower on > KNL than on "normal" nodes. The overhead is basically linear with the > number of hyperthreads, and KNL sequential perf is lower than your other > nodes. Right, thanks. I shouldn't have confused them, especially as I was looking at things concerned with discovery... I don't remember how that works, if I ever did in detail, but I was expecting it to scale with the number of kernel file opens. > > The easy fix is to export the topology to XML with lstopo foo.xml and > then tell all hwloc users to load from XML: Yes; I think I even noted that somewhere in the SGE source... By the way, in case this attracts the attention of anyone who might do what I did: hwloc-distances produces no output, as a feature <https://github.com/open-mpi/hwloc/issues/209>. _______________________________________________ hwloc-users mailing list hwloc-users@lists.open-mpi.org https://rfd.newmexicoconsortium.org/mailman/listinfo/hwloc-users
