EnvVariables.md

@@ -8,6 +8,8 @@ Some functionality of the LIKWID library can be changed by setting environment v
 * `LIKWID_SKIP`: Variable content must be a hexmask. This hexmask describes which threads should be skipped while pinning. This function is required to avoid pinning the shepherd threads used by some OpenMP and MPI implementations. The version 4.3.1 introduced an automatic detection of the shepherd threads. In most cases the detection works, but if not, the hexmask overwrites the automatic detection.
 * `LIKWID_DEBUG`: Verbosity settings for the LIKWID library
 * `LIKWID_FORCE_SETUP`: Always setup all counters in `setupCounters(...)` and don't respect the previous configuration. Without this environment variable set, LIKWID writes the configuration to the register only if the configuration has changed (compared to the last `setupCounters(...)` call)
+* `LIKWID_IGNORE_CPUSET`: LIKWID respects the CPUset of the calling process. If you want to measure/run outside of this CPUset, use this environment variable. It will not ignore the CPUset but create a new CPUset internally which contains `sysconf(_SC_NPROCESSORS_CONF)` hardware threads.
+
 
 ## Environment variables used by the MarkerAPI
 * `LIKWID_FILEPATH`: Filepath for the result file of the MarkerAPI.