hwloc (Hardware Locality) 2.3.0 is now available for download.
https://www.open-mpi.org/software/hwloc/v2.3/
v2.3.0 brings quite a lot of changes. The biggest one is the addition
of the memory attribute API to expose hardware information that vendors
are (slowly) adding to ACPI tables to describe heterogeneous memory
platforms (mostly DDR+NVDIMMs right now).
The following is a summary of the changes since v2.2.0.
Version 2.3.0
-------------
* API
+ Add hwloc/memattrs.h for exposing latency/bandwidth information
between initiators (CPU sets for now) and target NUMA nodes,
typically on heterogeneous platforms.
- When available, bandwidths and latencies are read from the ACPI HMAT
table exposed by Linux kernel 5.2+.
- Attributes may also be customized to expose user-defined performance
information.
+ Add hwloc_get_local_numanode_objs() for listing NUMA nodes that are
local to some locality.
+ The new topology flag HWLOC_TOPOLOGY_FLAG_IMPORT_SUPPORT causes
support arrays to be loaded from XML exported with hwloc 2.3+.
- hwloc_topology_get_support() now returns an additional "misc"
array with feature "imported_support" set when support was imported.
+ Add hwloc_topology_refresh() to refresh internal caches after modifying
the topology and before consulting the topology in a multithread context.
* Backends
+ Add a ROCm SMI backend and a hwloc/rsmi.h helper file for getting
the locality of AMD GPUs, now exposed as "rsmi" OS devices.
Thanks to Mike Li.
+ Remove POWER device-tree-based topology on Linux,
(it was disabled by default since 2.1).
* Tools
+ Command-line options for specifying flags now understand comma-separated
lists of flag names (substrings).
+ hwloc-info and hwloc-calc have new --local-memory --local-memory-flags
and --best-memattr options for reporting local memory nodes and filtering
by memory attributes.
+ hwloc-bind has a new --best-memattr option for filtering by memory
attributes
among the memory binding set.
+ Tools that have a --restrict option may now receive a nodeset or
some custom flags for restricting the topology.
+ lstopo now has a --thickness option for changing line thickness in the
graphical output.
+ Fix lstopo drawing when autoresizing on Windows 10.
+ Pressing the F5 key in lstopo X11 and Windows graphical/interactive outputs
now refreshes the display according to the current topology and binding.
+ Add a tikz lstopo graphical backend to generate picture easily included into
LaTeX documents. Thanks to Clement Foyer.
* Misc
+ The default installation path of the Bash completion file has changed to
${datadir}/bash-completion/completions/hwloc. Thanks to Tomasz Kłoczko.
Changes since 2.3.0rc1 are negligible.
--
Brice
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