HWLOC-DUMP-HWDATA(1) hwloc HWLOC-DUMP-HWDATA(1)
NAME
hwloc-dump-hwdata - Dump topology and locality information from
hardware tables
SYNOPSIS
hwloc-dump-hwdata [options]
OPTIONS
-o
save output files to directory instead of the default
/usr/var/run/hwloc/ that was specified at configure time.
You may want to set the HWLOC_DUMPED_HWDATA_DIR environment
variable as well so that the hwloc library looks for dumped
files in that same directory.
--version Report version and exit.
-h --help Display help message and exit.
DESCRIPTION
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, and they only
exist when there is dmi-sysfs support in the Linux kernel.
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 for Intel Xeon Phi
processors (Knights Landing and Knights Mill).
The current list of dumped information is:
Intel Xeon Phi processor memory, cache and clustering configuration
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.
SEE ALSO
hwloc(7), lstopo(1)
2.10.0 December 4, 2023 HWLOC-DUMP-HWDATA(1)