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 /var/run/hwloc/.

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.

       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.

SEE ALSO

       hwloc(7), lstopo(1)