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Section: New Software and Platforms
Hardware Locality
Participants : Brice Goglin, Samuel Thibault.
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Hardware Locality (hwloc ) is a library and set of tools aiming at discovering and exposing the topology of machines, including processors, cores, threads, shared caches, NUMA memory nodes and I/O devices.
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It builds a widely-portable abstraction of these resources and exposes it to the application so as to help them adapt their behavior to the hardware characteristics.
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hwloc targets many types of high-performance computing applications [2] [20] , from thread scheduling to placement of MPI processes. Most existing MPI implementations, several resource managers and task schedulers already use hwloc .
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hwloc is developed in collaboration with the Open MPI project. The core development is still mostly performed by Brice Goglin and Samuel Thibault from the Runtime team-project, but many outside contributors are joining the effort, especially from the Open MPI and MPICH2 communities.