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Failed to Get Cpufreq Parameter (Doc ID 2546200.1)

Last updated on OCTOBER 25, 2020

Applies to:

Oracle VM - Version 3.4.6 and later
Linux x86-64

Symptoms

The Xen hypervisor offers a mechanism to balance performance and power consumption through CPU frequency scaling. Known as the Current Governor, this mechanism can lower power consumption by throttling the clock speed when a CPU is idle.

Certain versions of Oracle VM Server have the Current Governor set to ondemand by default, which dynamically scales the CPU clock based on the load. Oracle recommends that on Oracle nodes you run the Current Governor with the performance setting. Particularly if you find that systems are not performing as expected after an upgrade of Oracle VM Server, make sure that the Current Governor is configured correctly.

To verify the Current Governor setting of a compute node, log in using SSH and enter the following command at the Oracle Linux prompt:

[root@XXX ~]# xenpm get-cpufreq-para|grep current_governor
[CPU0] failed to get cpufreq parameter
[CPU1] failed to get cpufreq parameter
[CPU2] failed to get cpufreq parameter
[CPU3] failed to get cpufreq parameter
[CPU4] failed to get cpufreq parameter
[CPU5] failed to get cpufreq parameter
[CPU6] failed to get cpufreq parameter
[CPU7] failed to get cpufreq parameter
[CPU8] failed to get cpufreq parameter

Changes

 No changes.

Cause

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In this Document
Symptoms
Changes
Cause
Solution


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