Hello, I'd like to see what hwloc reports on AMD machines with a HTX card (hypertransport expansion card). The most widely known case would likely be a 3-5-years old AMD cluster with Pathscale Infinipath network cards. But I think there are also some accelerators such as clearspeed, and the numaconnect single-image interconnect.
HTX slots do not involve PCI, but AMD may have implemented some glue to make them appear in lspci anyway. So it's not clear if hwloc will see them or not. If anybody has access to such a machine, could you please run lstopo (>=1.3) there and tell us if the HTX device appear? if not, we'll need to see if there are some /dev files to look at. If yes, does it appear close to a single socket ? If so, is this the right socket ? (feel free to tell what model of machine this is, I will check in the motherboard manual to make sure this is the right socket). Thanks Brice