Despite snow storms trying to cancel all my flights, I managed to give
two (basically identical) hwloc tutorials recently. A bit more than 3
hours covering a wide spectrum of features of command-line tools and of
the C interface.
Everything is available at
http://runtime.bordeaux.inria.fr/hwloc/tutorials/ (and it will remain
there for a long time since the conference proceedings point there).
I am thinking of doing another one at EuroMPI in september in Madrid.