NAME

       likwid-topology - print thread, cache, NUMA and Nvidia/AMD 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/AMD 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. The same is possible for AMD GPUs with ROCM_INTERFACE=TRUE and
       the required ROCm libraries.

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/AMD GPUs in the system (if compiled
              with Nvidia or AMD 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),