Configuration of base clock frequency of processor based on usage parameters

Patent metadata

Field	Value
Publication number	US-12066853-B2
Application number	US-202318329492-A
Country	US
Kind code	B2
Filing date	Jun 5, 2023
Priority date	Feb 24, 2017
Publication date	Aug 20, 2024
Grant date	Aug 20, 2024

Abstract

A processing device includes a plurality of processing cores, a control register, associated with a first processing core of the plurality of processing cores, to store a first base clock frequency value at which the first processing core is to run, and a power management circuit to receive a base clock frequency request comprising a second base clock frequency value, store the second base clock frequency value in the control register to cause the first processing core to run at the second base clock frequency value, and expose the second base clock frequency value on a hardware interface associated with the power management circuit.

First claim

What is claimed is:

1. A multi-core processor comprising:
a plurality of processing cores;
a plurality of control registers, each control register of the plurality of control registers associated with a corresponding processing core;
the plurality of control registers to store a corresponding plurality of values to indicate a per-core clock frequency for corresponding processing cores, the plurality of values initially comprising a plurality of default values to indicate a default per-core clock frequency for a corresponding processing core, the plurality of default values determined during manufacture of the multi-core processor;
execution circuitry to execute software or firmware to indicate a target service level for one or more virtual machines or containers, the target service level associated with target per-core clock frequencies for one or more processing cores of the plurality of processing cores, the target per-core clock frequencies different from corresponding default per-core clock frequencies;
power management circuitry to execute power management firmware to control clock frequencies of the processing cores based, at least in part, on the plurality of values, the power management circuitry to:
receive a plurality of target values associated with the target per-core clock frequencies,
store the plurality of target values in corresponding control registers of the plurality of control registers, each target value to indicate a target per-core clock frequency for a corresponding processing core of the plurality of processing cores,
cause each corresponding processing core of the plurality of processing cores to run at the corresponding target per-core clock frequency, and
expose the plurality of target values to software.

2. The processor of claim 1 , wherein the default values and the target values are clock speeds at which the processor is to perform at a pre-determined level of workload within a thermal design power (TDP) limit of the processor.

3. The processor of claim 1 , wherein the target values and corresponding target per-core clock frequencies are different than the default values and corresponding default per-core clock frequency, respectively.

4. The processor of claim 1 , wherein the power management circuitry is to expose the target values on a hardware interface.

5. The processor of claim 4 , wherein the power management circuitry is to receive the target values from at least one of a controller executing a basic input/output system (BIOS) instruction or from a system software application executing on the processor.

6. The processor of claim 4 , wherein the processor is to execute a system software application to retrieve the target values via the hardware interface.

7. The processor of claim 1 , wherein the plurality of control registers include model specific registers (MSRs), wherein an individual MSR of the MSRs is associated with each of the processing cores.

8. The processor of claim 1 , wherein the power management circuitry is to adjust one or more workloads on the processor to ensure that generated thermal energy does not violate a thermal design power (TDP) associated with the processor.

9. The processor of claim 8 , wherein the power management circuitry is to adjust the one or more workloads by offloading a task to another processor or reducing the target per-core clock frequencies.

10. The processor of claim 1 , wherein at least one of the plurality of processing cores is to be run at a first per-core clock frequency and at least one other of the plurality of processing cores is to be run at a second per-core clock frequency.

11. The processor of claim 1 , further comprising a register to store a bit map, where each bit of the bit map stores an activity status for a corresponding processing core.

12. The processor of claim 1 , wherein the power management circuitry is to shut down one or more inactive processing cores of the plurality of processing cores and divert resulting spare power to active processing cores of the plurality of processing cores, including the corresponding processing cores of the plurality of processing cores running at the target per-core clock frequencies.

13. The processor of claim 1 , wherein receiving the target values and exposing the target values to software comprises executing commands of an interface exposed by the processor.

14. The processor of claim 1 , wherein the target service level and the one or more virtual machines or containers are associated with a customer of a cloud service provider.

15. The processor of claim 1 , wherein the target service level further indicates one or more of: an allowable power consumption by the virtual machines or containers, an allowable software object instruction mix, an allowable reliability or wear rate, exclusivity of use of the one or more processing cores, and an allowable amount of time for accomplishing a task.

16. A processor comprising:
a plurality of processing cores;
each one of the processing cores associated with a respective control register to store per-core base clock frequency values for a corresponding processing core of the plurality of processing cores,
the per-core base clock frequency values initially comprising default per-core base clock frequency values determined by a manufacturer of the processor;
execution circuitry to execute software or firmware to indicate a target service level for one or more virtual machines or containers, the target service level associated with target per-core base clock frequency values for one or more processing cores of the plurality of processing cores, the target per-core base clock frequency values different from corresponding default per-core base clock frequency values; and
a power management circuit to execute power control unit, PCU, firmware to control clock frequencies of the plurality of processing cores based, at least in part, on the target per-core base clock frequency values, the power management circuit to:
store the target per-core base clock frequency values in corresponding control registers, each target per-core base clock frequency value to cause a corresponding processing core of the plurality of processing cores to run according to the target per-core base clock frequency value; and
expose the target per-core base clock frequency values to software.

17. The processor of claim 16 , wherein the default per-core base clock frequency values and the target per-core base clock frequency values are clock speeds at which the processor is to perform at a pre-determined level of workload within a thermal design power, TDP, limit of the processor.

18. The processor of claim 16 , wherein the target per-core base clock frequency values are different than the default per-core base clock frequency values.

19. The processor of claim 16 , wherein the power management circuit is to expose the target per-core base clock frequency values on a hardware interface.

20. The processor of claim 19 , wherein the power management circuit is to receive the target per-core base clock frequency values from at least one of a controller executing a basic input/output system, BIOS, instruction or from a system software application executing on the processor.

21. The processor of claim 19 , wherein the processor is to execute a system software application to retrieve the target per-core base clock frequency values via the hardware interface.

22. The processor of claim 16 , wherein the corresponding control registers

Assignees

• Intel Corp

Inventors

• Srinivasan Vasudevan
• Sistla Krishnakanth V
• Gough Corey D
• Steiner Ian M
• Gupta Nikhil
• Garg Vivek
• Varma Ankush
• Vora Sujal A
• Lerner David P
• Sullivan Joseph M
• Gurumoorthy Nagasubramanian
• Bowhill William J
• Ramamurthy Venkatesh
• Macnamara Chris
• Browne John J
• Das Ripan

Classifications

• G06F9/4893

  taking into account power or heat criteria (power management in computers in general G06F1/3203; thermal management in computers in general G06F1/206) · CPC title

• Y02D10/00

  Energy efficient computing, e.g. low power processors, power management or thermal management · CPC title

• G06F1/324

  by lowering clock frequency · CPC title

• G06F2009/45591

  Monitoring or debugging support · CPC title

• G06F9/45558

  Hypervisor-specific management and integration aspects · CPC title