Hi Brice, this new feature sounds very interesting!
Add hwloc/memattrs.h for exposing latency/bandwidth information > between initiators (CPU sets for now) and target NUMA nodes, > typically on heterogeneous platforms. If I get it right, I need to have an ACPI HMAT table on the system to use the new functionality, right? I have tried following on Fedora acpidump -o acpidump.bin acpixtract -a acpidump.bin but there is no HMAT table reported. So it seems I'm out of luck, and I cannot test the new functionality, right? Also, where can we find the list of attributes supported by --best-memattr? --best-memattr <attr> Only display the best target among the local nodes By trial and error, I have found out that latency and bandwidth are supported. Are there any other? Could you please add the list to hwloc-info -h? hwloc-info --best-memattr bandwidth hwloc-info --best-memattr latency Thanks a lot! Jirka On Thu, Oct 1, 2020 at 12:45 AM Brice Goglin <brice.gog...@inria.fr> wrote: > hwloc (Hardware Locality) 2.3.0 is now available for download. > > https://www.open-mpi.org/software/hwloc/v2.3/ > <https://www.open-mpi.org/software/hwloc/v2.0/> > > 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 > > > _______________________________________________ > hwloc-announce mailing list > hwloc-annou...@lists.open-mpi.org > https://lists.open-mpi.org/mailman/listinfo/hwloc-announce -- -Jirka
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