Problems with cores and CPUs (on servers)

[Francisco_Guerrero]

Hi

I'm having a problem. My provider wants to standardize the CPU frequency at the same speed (2.4 GHz). This task has already been done at the hardware level, but it's not fully reflected at the operating system level. For example, when running: "cat /proc/cpuinfo | grep MHz | sort | uniq -c", differences in CPU frequency are still visible. Now, there's the issue of cores/threads, and in the image, I assume they are threads and not cores (already standardized at the hardware level). 

Intel(R) Xeon(R) Platinum 8260 CPU @ 2.40GHz

OS version is RedHat 8.10.

Model servers:  Lenovo SR850P, 950 and 650

Regards

[OttoChow]

From the numbers, I assume that your server has 4 processor and Hyperthreading is enabled.   Xeon 8260 is a 24 core processor.  With hyperthreading enabled (by default), it support 48 logical cores per processor.  /proc/cpuinfo shows  that there is 192 CPU .... that is 192 logical cores.    If your question is ... there is still 1 logical CPU is not running at 2.4GHz.  You need to ensure that the CPU power saving feature such as C-State (C6, C1) and Speed Step Technology are all disabled at BIOS level.

Then all CPU cores of the server will run at base frequency - 2.4GHz.

[Sachinks]

Hello Francisco_Guerrero,

Greetings!

Thank you for posting in Intel community Forum.

We understand that you have a concern related to the standardization of the CPU frequency.

Kindly let us know if the details provided above ( ensuring that the CPU power saving feature such as C-State (C6, C1) and Speed Step Technology are all disabled at BIOS level) are helpful.

Also, we see that this processor is a tray processor. Hence, as these processors are shipped with the system ( Lenovo), we request you to check this further with Lenovo itself as they will be best equipped to assist you with this.

Regards,

Sachin KS

Intel Customer Support Technician

[Francisco_Guerrero]

Hi

I'll follow the recommendation
Give me a chance to review it and I'll let you know shortly.

Regards

[vish1]

Hello Francisco_Guerrero,

Greetings!!

Thank you for the update. Please keep us posted with any further developments.

Best Regards,

Vishal Shet P

Intel Customer Support Technician

[Francisco_Guerrero]

Hi

I tested it on a Lenovo SR950P model with 8 sockets, turning off C-state and turbo mode. The result is better seen in image B.

Image A (before the change)

Image B:

I'll continue testing on different models in the coming days and update the progress.  

Info server (CPU's):

Regards

[Sazirah]

Hi Francisco_Guerrero,

Thank you for sharing the update.

This is noted, kindly keep us posted on this.

Also, we see that this processor is a tray processor. Hence, as these processors are shipped with the system ( Lenovo), we request you to check this further with Lenovo itself as they will be best equipped to assist you with this.

Regards,

Sazzy_Intel

Intel Customer Support Technician

[Sachinks]

Hello Francisco_Guerrero,

Greetings for the day!

I hope this message finds you well.

This is a follow up. Kindly let us know if you were able to contact Lenovo regarding this and kindly provide us an update.

Regards,

Sachin KS

Intel Customer Support Technician

[Sachinks]

Hello Francisco_Guerrero,

Greetings for the day!

We would like to inform you that we are closing this request as no response has been received from our previous follow-ups. 

Please don't hesitate to ask any further questions in the future. Feel free to start a new conversation, as this thread will no longer be monitored.

Regards,

Sachin KS

Intel Customer Support Technician