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hwloc-dump-hwdata - Dump topology and locality information from hardware tables


hwloc-dump-hwdata [options]


-o <dir> save output files to directory <dir> instead of the default /var/run/hwloc/.


hwloc may benefit from some locality and topology information from SMBIOS or ACPI tables.
They are accessible from raw hardware files under directories such /sys/firmware/dmi/ or
/sys/firmware/acpi/ on Linux. These files are usually only accessible to root.

The hwloc-dump-hwdata tool dumps the useful contents of such files into human-readable and
world-accessible files. The intent is to run the tool once during boot and have the main
(non-privileged) hwloc library gather information from these human-readable files.

hwloc-dump-hwdata is currently only useful on Intel Knights Landing Xeon Phi platforms.

The current list of dumped information is:

Intel Knights Landing memory-side cache characteristics
gathered from specific SMBIOS entries such as /sys/firmware/dmi/entries/14-* and
/sys/firmware/dmi/entries/160-*, and saved in file knl_memoryside_cache.

If the output directory is changed, you may want to set the HWLOC_DUMPED_HWDATA_DIR
environment variable accordingly so that the hwloc library finds the dumped files.

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