dpdk-test power_autotest, power_caps_autotest

[Xiaoping Yan (NSB)]

Hi,

Have you checked if the file exist in your system (replace the %u with a cpu index)
/sys/devices/system/cpu/cpu%u/cpufreq/scaling_governor

Also write to above file requires root user.

-----Original Message-----
From: Antonio Di Bacco <a.dibacco.ks at gmail.com> 
Sent: 2023年1月11日 18:06
To: users at dpdk.org
Subject: dpdk-test power_autotest, power_caps_autotest

The dpdk-test is really a nice piece of software.
Today I tried to use it to "autotest" the power DPDK subsystem but I fail to fully understand the feedback it gives (consider I've disable intel_pstate driver):

For example:

RTE>>power_autotest
POWER: Invalid Power Management Environment(0) set


RTE>>power_caps_autotest
POWER: Env isn't set yet!
POWER: Attempting to initialise ACPI cpufreq power management...
POWER: Failed to write /sys/devices/system/cpu/cpu%u/cpufreq/scaling_governor
POWER: Cannot set governor of lcore 2 to userspace
POWER: Attempting to initialise PSTAT power management...
POWER: Initialized successfully for lcore 2 power management
POWER: Capabilities 1


How to fix the "Invalid Power Management Environment(0) set" and the Failed to write /sys/devices/system/cpu/cpu%u/cpufreq/scaling_governor
?