hwloc (Hardware Locality) 2.6.0rc1 is now available for download.
https://www.open-mpi.org/software/hwloc/v2.6/ v2.6.0 is a small release that improves existing support for hybrid CPUs, AMD GPUs, Linux memory binding, etc. The following is a summary of the changes since v2.5.0. Version 2.6.0 ------------- * Backends + Expose two cpukinds for energy-efficient cores (icestorm) and high-performance cores (firestorm) on Apple M1 on Mac OS X. + Use sysfs CPU "capacity" to rank hybrid cores by efficiency on Linux when available (mostly on recent ARM platforms for now). + Improve HWLOC_MEMBIND_BIND (without the STRICT flag) on Linux kernel >= 5.15: If more than one node is given, the kernel may now use all of them instead of only the first one before falling back to others. + Expose cache os_index when available on Linux, it may be needed when using resctrl to configure cache partitioning, memory bandwidth monitoring, etc. + Add a "XGMIHops" distances matrix in the RSMI backend for AMD GPU interconnected through XGMI links. + Expose AMD GPU memory information (VRAM and GTT) in the RSMI backend. + Add OS devices such as "bxi0" for Atos/Bull BXI HCAs on Linux. * Tools + lstopo has a better placement algorithm with respect to I/O objects, see --children-order in the manpage for details. + hwloc-annotate may now change object subtypes and cache or memory sizes. * Build + Allow to specify the ROCm installation for building the RSMI backend: - Use a custom installation path if specified with --with-rocm=<dir>. - Use /opt/rocm-<version> if specified with --with-rocm-version=<version> or the ROCM_VERSION environment variable. - Try /opt/rocm if it exists. - See "How do I enable ROCm SMI and select which version to use?" in the FAQ for details. * Documentation + Add FAQ entry "How do I create a custom heterogeneous and asymmetric topology?" -- Brice
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