topic How to disable Turbo boost Max 3.0 programmatically ? in Software Tuning, Performance Optimization & Platform Monitoring

How to disable Turbo boost Max 3.0 programmatically ?

Popov__Maxim — Sun, 10 Jun 2018 07:14:31 GMT

Hello!

I'm working on software which doesn't have any benefits from Turbo boost 3.0.

Moreover we have user complaints when Turbo boost 3.0 works inadequately with our product.

Can we disable Turbo boost 3.0 for our software programmatically ?

Best regards,

Maksim Popov

According to Volume 4 of the

McCalpinJohn — Mon, 18 Jun 2018 20:35:32 GMT

According to Volume 4 of the Intel Architectures Software Developer's Manual (document 335592), writing "1" to bit 38 of IA32_MISC_ENABLE (MSR 0x1a0) will disable Turbo mode for the package on several generations of Intel processors.

Hi John,

Popov__Maxim — Tue, 19 Jun 2018 03:34:23 GMT

Hi John,

Thank you for the answer.

As I found here:

https://www.intel.com/content/dam/www/public/us/en/documents/manuals/64-ia-32-architectures-software-developer-vol-3b-part-2-manual.pdf

14.3.2.1

"Opportunistic processor performance operation can be disabled by setting bit 38 of IA32_MISC_ENABLE. This mechanism is intended for BIOS only" - it is for BIOS only and it will affect all the system, not only our software.

Also I'm talking about "Turbo boost Max 3.0" which is more software than hardware as I understand. At least Turbo boost Max 3.0 has software part which analyzes running software and workloads. I would like that "Turbo boost Max 3.0" doesn't affect our software at all.