NAME¶

likwid-topology - print thread and cache topology

SYNOPSIS¶

likwid-topology [-hvgcC] [-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. 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.

-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.

-o, --output <file>

write the output to file instead of stdout. Likwid applies filter scripts according to filename suffix. Currently available scripts are csv. 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),