likwid_topo.cfg

likwid_topo.cfg

The topology configuration file for LIKWID is basically a structured output of the topology and NUMA module of LIKWID. It is recommended to create it with likwid-genTopoCfg but you can also create it manually. The file is system specific, thus copying it to another machine can cause undefined behavior.

The startup of LIKWID will be slightly faster with the topology configuration file because it has everything LIKWID needs in one file instead of multiple files that are traversed by the internal HWLOC library.

Syntax

Some example lines of the topology configuration file:

cpuid_info family = 6
cpuid_info perf_num_fixed_ctr = 3
cpuid_info turbo = 1
cpuid_topology numThreadsPerCore = 2
cpuid_topology numSockets = 1
cpuid_topology cacheLevels 1 type = DATACACHE
cpuid_topology cacheLevels 1 size = 32768
numa_info numberOfNodes = 1
numa_info nodes 1 numberOfProcessors = 8

The first column describes the target structure. The following columns until the = the sub-entries of the structure. After the = is the value.