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hwloc lstopo

Display the topology of your hardware using the hwloc library and lstopo tool
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.

hwloc primarily aims at helping applications with gathering information about increasingly complex parallel computing platforms so as to exploit them accordingly and efficiently. For instance, two tasks that tightly cooperate should probably be placed onto cores sharing a cache. However, two independent memory-intensive tasks should better be spread out onto different sockets so as to maximize their memory throughput.
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  • Version 2.13.0rc1-1-1.6.1 (80281) suggested Added on Jan 27, 2026

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  • Version 2.12.2-1-1.6.1 (80279) - Added on Sep 01, 2025

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  • Version 2.12.0-1-1.6.1 (80278) - Added on Feb 23, 2025

    arm64-v8a armeabi-v7a x86 x86_64

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