likwid-setFrequencies.md

@@ -27,6 +27,11 @@ likwid-setFrequencies can only be used in conjunction with the `acpi-cpufreq` ke
 -y/--max freq	 Set maximal CPU frequency
 --umin freq	 Set minimal Uncore frequency
 --umax freq	 Set maximal Uncore frequency
+
+-reset	Set governor 'performance', set minimal and maximal frequency to
+	the CPU limits and deactivate turbo
+-ureset	Set Uncore frequencies to its min and max limits
+
 ```
 
 ## Usage
@@ -82,6 +87,12 @@ Prints all available affinity domains, see [[likwid-pin|likwid-pin]] Wiki page.
 ### Manipulating Uncore frequency on Intel CPUs
 Some Intel CPUs provide the possibility to change the Uncore frequency. You can use the `--umin` and `--umax` command line options to set it. One problem with the Uncore frequency is that the minimal and maximal frequency limits are not readable in all system configurations. Therefore LIKWID defines a range of supported frequencies. To be sure that the frequency you adjusted as requested, measure the `UNCORE_CLOCK` event using `likwid-perfctr`.
 
+### Resetting frequencies
+Starting with LIKWID 4.3.2, it is possible to reset the CPU and Uncore frequencies to its full range to return to a defined state. There are different switches for CPU frequencies (`-reset`) and Uncore frequencies (`-ureset`):
+
+- `-reset`: Change CPU frequencies to its minimal and maximal frequencies. If not specified, the turbo is deactivated and the maximum non-turbo frequency selected. The turbo reset setting can be set with `-t <0|1>`. The governor is switched back to the last on the list of available governors (`-m`) or to the one specified (`-g <gov>`).
+- `-ureset`: Change the Uncore frequencies to minimum (lowest available CPU frequency, first at `likwid-setFrequencies -l`) and to maximum (highest turbo frequency if only a single core is running, `C0` at `likwid-powermeter -i`)
+
 ## Configuration of the setFreq daemon
 
 Since the daemon process `likwid-setFreq` requires higher privileges than the control script likwid-setFrequency. There are two methods to grant this to the daemon: