HWLOC-DUMP-HWDATA(1) hwloc HWLOC-DUMP-HWDATA(1)
NAME
hwloc-dump-hwdata - Dump topology and locality information from hard-
ware tables
SYNOPSIS
hwloc-dump-hwdata [options]
OPTIONS
-o <dir> save output files to directory <dir> instead of the default
/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 SM-
BIOS 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 proces-
sors (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/en-
tries/160-*, and saved in file knl_memoryside_cache.
SEE ALSO
hwloc(7), lstopo(1)
2.9.0 Dec 14, 2022 HWLOC-DUMP-HWDATA(1)
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