NAME
hwloc-dump-hwdata - Dump topology and locality information from hardware tables
SYNOPSIS
hwloc-dump-hwdata [options]
OPTIONS
- -o <dir>
-
save output files to directory <dir> 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.