Brice Goglin <brice.gog...@inria.fr> writes:

> Hello
> It's not a feature. This should work fine.
> Random guess: do you have NUMA headers on your build machine ? (package
> libnuma-dev or numactl-devel)
> (hwloc-info --support also report whether membinding is supported or not)
> Brice

Oops, you're right!  Thanks.  I thought what I'm using elsewhere was
built from the same srpm, but the rpm on the KNL box doesn't actually
require libnuma.  After a rebuild, it's OK and I'm suitably embarrassed.

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.
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