Bios is not setting CPU cores to maximum frequency

[Brahamaprakash Vardhaman]

We are hitting below customer issue as explained briefly below.

“
UCS C220 M5
Firmware 4.0(2f) - standalone
Ubuntu 16.04.5 LTS with 4.15.0-29-generic kernel (HWE)

The customer is looking to force the CPU frequency to stay on max value. Ubuntu detects variable speeds (the CPU cores are going down to 800 MHz):

Bios is not setting all CPU cores to maximum frequency in Ubuntu.
Bios settings are as below.

- Disabled Intel speedstep
- Disabled TurboBoost
- Limited to C0/C1 only with disabled extended states
- Disabled P states, or reduced as much as possible
- Set profiles to max performance
- Control for CPU performance is done via BIOS, not OS
- CPU performance is Enterprise

The issue is also not seen on another C220 M5SX without NVMe drives running 3.1(3i). Same kernel version for Ubuntu.
Downgrading the firmware on one of the affected C220 M5s doesn't resolve the issue.”

All the cores are running on max frequency after applying the below command at the OS level:

tuned-adm profile latency-performance

“

So please let us know is this BIOS or Ubuntu issue?

I . will attach logs soon.

[Jeff Lane  (bladernr)]

Something tells me this is not filed against the right project, and likely will not get the attention it deserves until it is moved to the correct project.

[Jeff Lane  (bladernr)]

Moved to correct project

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1839166

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]