NAME

       hwloc-gather-cpuid - Dumps the relevant x86 cpuid values for later (possibly offline) usage

SYNOPSIS

       hwloc-gather-cpuid [options] [<outdir>]

OPTIONS

       -c <idx>
              Only gather cpuid values for logical processor whose OS/physical index is <idx>.

       -s --silent
              Do not show verbose messages.

       -h --help
              Display help message and exit.

DESCRIPTION

       hwloc-gather-cpuid  dumps all the relevant x86 cpuid values into subdirectory cpuid of current directory,
       or in <outdir> if specified.

       These files can be used later to explore the machine  topology  offline,  for  instance  by  setting  the
       environment  variable  HWLOC_CPUID_PATH  to the directory containing all output files, and by forcing the
       x86 backend with HWLOC_COMPONENTS=x86,stop.

       The directory contents may also be submitted to hwloc developers to debug issues remotely.

       If - is used as <outdir>, the output is dumped to the standard output, but  a  unique  logical  processor
       must have been given with -c.

       hwloc-gather-cpuid is a x86 specific tool, it cannot be used on other platforms.

       NOTE:  hwloc-gather-cpuid  gathers  many hardware details about the platform.  Output files should not be
       posted on public lists or websites unless it is clear that they contain no sensitive information.

       NOTE: The output of hwloc-gather-cpuid is included in  the  tarball  saved  by  hwloc-gather-topology  on
       Linux/x86.

       NOTE: It is highly recommended that you read the hwloc(7) overview page before reading this man page.

EXAMPLES

       To store cpuid information of all logical processors of the current machine:

               $ hwloc-gather-cpuid
               Gathering in directory ./cpuid ...
               Gathering CPUID of PU P#0 in path ./hwloc-x86-cpuid/pu0 ...
               Gathering CPUID of PU P#1 in path ./hwloc-x86-cpuid/pu1 ...
               Gathering CPUID of PU P#2 in path ./hwloc-x86-cpuid/pu2 ...
               Gathering CPUID of PU P#3 in path ./hwloc-x86-cpuid/pu3 ...
               Summary written to ./cpuid/hwloc-cpuid-info

RETURN VALUE

       Upon successful execution, hwloc-gather-cpuid will exit with the code 0.

       hwloc-gather-cpuid  will return nonzero exit status if any kind of error occurs, such as (but not limited
       to) failure to create the output files.

SEE ALSO

       hwloc(7), hwloc-gather-topology(1), lstopo(1)