NAME

       likwid-topology - print thread, cache, NUMA and Nvidia GPU topology

SYNOPSIS

       likwid-topology [-hvgcCG] [-V level] [-o output_file]

DESCRIPTION

       likwid-topology  is  a  command line application to print the thread and cache topology on
       multicore x86, ARM and POWER processors and Nvidia GPUs.  Used with mono spaced  fonts  it
       can draw the processor topology of a machine in ASCII art. Beyond topology likwid-topology
       determines the clock of a processor and  prints  detailed  information  about  the  caches
       hierarchy.   When  compiled  with  NVIDIA_INTERFACE=true  in  config.mk and the CUDA/CUPTI
       library reachable at runtime, likwid-topology prints information about the Nvidia GPUs  in
       the system.

OPTIONS

       -h, --help
              prints a help message to standard output, then exits.

       -v, --version
              prints version information to standard output, then exits.

       -V, --verbose <level>
              sets the verbosity level of LIKWID's topology backend. Possible levels range from 0
              to 3.

       -g     prints topology information in ASCII art. Best viewed with monospaced font. The GPU
              topology is not printed.

       -c, --caches
              prints detailed information about cache hierarchy

       -C, --clock
              measures and output the processor clock. This involves a longer run time of likwid-
              topology.

       -G, --gpus
              prints detailed information about the Nvidia GPUs in the system (if  compiled  with
              Nvidia support)

       -o, --output <file>
              write  the  output  to  file  instead  of  stdout.   Likwid  applies filter scripts
              according to filename suffix.  Currently available scripts are csv, xml  and  json.
              You can place additional filter scripts in /usr/share/likwid/filter.

AUTHOR

       Written by Thomas Gruber <thomas.roehl@googlemail.com>.

BUGS

       Report Bugs on <https://github.com/RRZE-HPC/likwid/issues>.

SEE ALSO

       likwid-perfctr(1), likwid-features(1), likwid-pin(1),