Maybe this utility will be useful to you. http://www.open-mpi.org/projects/hwloc/ Portable Hardware Locality (hwloc)
"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.
The democratization of multicore processors and NUMA architectures leads to the spreading of complex hardware topologies into the whole server world. Nodaways every single cluster node may contain tens of cores, hierarchical caches, and multiple memory nodes, making its topology far from flat. Such complex and hierarchical topologies have strong impact of the application performance. The developer must take hardware affinities into account when trying to exploit the actual hardware performance. (...)"
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