How to disable CPU FREQUENCY SCALING

SUSE Product Topics SLES Configure-Administer
1

Hi there,

I have a problem with my SLES4SAP 11 SP4, it keeps rebooting itself every once in a while and everytime it reboots it coincides with the CPU Frequency Scaling

Anyway, Can someone tell me a step by step on how to disable the CPU Frequency Scaling feature without any reboots.

cpufreq-info

[QUOTE]cpufrequtils 004: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to http://bugs.opensuse.org, please.
analyzing CPU 0:
no or unknown cpufreq driver is active on this CPU
analyzing CPU 1:
no or unknown cpufreq driver is active on this CPU
analyzing CPU 2:
no or unknown cpufreq driver is active on this CPU
analyzing CPU 3:
no or unknown cpufreq driver is active on this CPU[/QUOTE]

Error message in /var/log/messages

[QUOTE]Feb 6 22:55:07 syslog-ng[1524]: syslog-ng starting up; version=‘2.0.9’
Feb 6 22:55:09 rchal: CPU frequency scaling is not supported by your processor.
Feb 6 22:55:09 rchal: boot with ‘CPUFREQ=no’ in to avoid this warning.
Feb 6 22:55:09 rchal: Cannot load cpufreq governors - No cpufreq driver available[/QUOTE]

2

Hi
What CPU(s) is the system using? It maybe just the module not loaded…

–
Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
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3

[QUOTE=malcolmlewis;36418]Hi
What CPU(s) is the system using? It maybe just the module not loaded…

–
Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
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I do not need to load the module successfully but I just need to disable it. the system is on a virtual machine on vmware esx host 6

4

Hi
Check the output from lsmod for the relevant cpu scaling kernel modules
and remove, then blacklist them.

But it does sound more like an ESXi/host issue rather than a guest
issue.

–
Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
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5

Am 07.02.2017 um 07:05 schrieb malcolmlewis:[color=blue]

Hi
Check the output from lsmod for the relevant cpu scaling kernel modules
and remove, then blacklist them.

But it does sound more like an ESXi/host issue rather than a guest
issue.
[/color]
As per the other post in the networking forum. I think that’s a red
herring. Literally every SLES Server in a VM throws that message without
any real world issues.

I’m sure cpufreq can be disabled, but I never bothered…

CU,

Massimo Rosen
Micro Focus Knowledge Partner
No emails please!
http://www.cfc-it.de