hwloc (Hardware Locality) 2.6.0 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, and Linux memory binding.
It also adds Windows CMake support.
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.
+ Add a CMakeLists for Windows under contrib/windows-cmake/ .
* Documentation
+ Add FAQ entry "How do I create a custom heterogeneous and
asymmetric topology?"
--
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