System Info

System info has been moved to the main menu for easy access.

This information is generated using the Portable Hardware Locality (hwloc) software package, which provides a portable abstraction of the hierarchical topology of modern architectures. This includes information about NUMA memory nodes, sockets, shared caches, cores, and simultaneous multithreading. hwloc 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.

hwloc primarily aims to help applications gather information about increasingly complex parallel computing platforms so that they can be exploited more effectively and efficiently.

Portability

• Since it uses standard Operating System information, hwloc’s support is almost always independent from the processor type (x86, powerpc, ia64, …), and just relies on the Operating System support.
• Whenever the OS does not support topology information (e.g. some BSDs), hwloc uses an x86-only CPUID-based backend.