cpufreq
This utility allows you to use the Enhanced SpeedStep, which is a series of dynamic frequency scaling technologies that's built into variants of microprocessors from Intel, such as the Goldmont core found on the Apollo Lake System-on-a-Chip (SoC).
Syntax:
cpufreg [-f frequency] [-i poll_interval] [-p priority] [-P policy] [-v]
Runs on:
QNX Neutrino
Options:
- -f frequency
- Force the CPU clock to be set to the specified frequency, in KHz. Don’t specify a policy (-P option) when you use this option. No default value and the maximum value you can specify is 268435455 KHz.
- -i poll_interval
- Set the polling interval of the CPU accounting, in milliseconds. Default is 1000 milliseconds.
- -p priority
- Set the priority of the CPU accounting thread. The default is 51.
- -P policy
- Set CPU clock frequency using one of the following values to
specify the policy to use:
- 0: On-demand. This sets the clock to a low speed.
- 1: Performance. Run at the highest available clock speed on the core. The frequency varies based on the hardware core that's used.
- -v
Increase output verbosity. The -v option is cumulative; each additional v (up to five) adds a level of verbosity.
Description:
The cpufreq is a utility that you can run on Intel-based platforms with cores that support Intel SpeedStep technology. You run the command to adjust the clock frequency on the core according to the adjustment policy and CPU load.
Examples:
Set the CPU frequency to Performance with high verbosity, at a priority of 50, and poll every 500 milliseconds:
cpufreq -vvv -P1 -i500 -p 50
Exit status:
- -1
- An invalid option was specified or if an unsupported CPU is detected.
- 0 (EXIT_SUCCESS)
- The utility completed running successfully.