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.

       --version
              Report version and exit.

       -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)