Turbo Boost / nanosleep

[sarnold]

Nanosleep(0) in a RT spin loop locked to a specific core behaves differently if Turbo  Boost on or off.

Turbo Boost off: lower priority task cannot execute on same core.

Turbo Boost on: lower priority task gets a chance to run on same core.

Why does Turbo Boost change behavior ?

DMI : HPE ProLiant DL560 Gen10/ProLiant DL560 Gen10, BIOS U34 11/13/2019
model name : Intel(R) Xeon(R) Gold 6154 CPU @ 3.00GHz
kernel : 5.11.17 PREEMPT

[VonM_Intel]

Hi, sarnold.

Thank you for posting in the Intel Communities.

We have a forum category for the specific issues related to your product. This category is monitored by our experts who can provide you with the best solution. To help you get your answer more quickly, we will now move your post to that category. 

Best Regards,

Von M.

Intel Customer Support Technician

[Azeem_Intel]

Hi sarnold,

Greetings for the day!

I hope you are doing well. Could you please share a snapshot of the defective part with the serial number visible? Additionally, please let us know if this product was purchased separately or with the machine

Please do not hesitate in contact us, we are more than glad to assist you.

Best Regards,

Azeem

[Azeem_Intel]

Hi sarnold,

Greetings for the day!

This is the first follow-up regarding the issue (Turbo Boost / nanosleep) you reported to us.

We wanted to inquire whether you had the opportunity to review the plan of action (POA) we provided.

Please do not hesitate in contact us, we are more than glad to assist you.

Best Regards,

Azeem

[Azeem_Intel]

Hello sarnold,

Hope you are doing well!

This is the second follow-up regarding the reported issue. We're eager to ensure a swift resolution and would appreciate any updates or additional information you can provide.

Please do not hesitate in contact us, we are more than glad to assist you.

Best Regards,

Azeem_Intel

[Azeem_Intel]

Hello sarnold,

Hope you are doing well!

This is the third follow-up regarding the reported issue. We're committed to ensuring a swift resolution and would greatly appreciate any updates or additional information you can provide.

If we don't hear back from you soon, we'll assume the issue has been resolved and will proceed to close the case.

Please do not hesitate in contact us, we are more than glad to assist you.

Best Regards,

Azeem_Intel