hwloc (Portable Hardware Locality)

The Portable Hardware Locality (hwloc) software package provides a

portable abstraction (across OS, versions, architectures, ...) of the

hierarchical topology of modern architectures, including NUMA memory

nodes, sockets, shared caches, cores and simultaneous multithreading.

It also gathers various system attributes such as cache and memory

information as well as the locality of I/O devices such as network

interfaces, InfiniBand HCAs or GPUs. It primarily aims at helping

applications with gathering information about modern computing

hardware so as to exploit it accordingly and efficiently.