Brice Goglin <brice.gog...@inria.fr> writes: > I ran more benchmarks. What's really slow is the reading of all sysfs > files. About 90% of the topology building time is spent there on KNL. > We're reading more than 7000 files (most of them are 6 files for each > hardware thread and 6 files for each cache).
For what it's worth, I was misled when I investigated originally by counting calls of open and not openat, which is what hwloc uses. It's especially confusing that numactl uses open, not openat (doubtless less correctly). A useful lesson. _______________________________________________ hwloc-users mailing list hwloc-users@lists.open-mpi.org https://rfd.newmexicoconsortium.org/mailman/listinfo/hwloc-users
