Apparatus and method for activating and shutting down enhanced modules within an activated pipeline stage based on performance requirements and module priority

Patent metadata

Field	Value
Publication number	US-9348406-B2
Application number	US-201213457011-A
Country	US
Kind code	B2
Filing date	Apr 26, 2012
Priority date	Jan 25, 2008
Publication date	May 24, 2016
Grant date	May 24, 2016

Abstract

The present invention discloses a method of processing instructions in a pipeline-based central processing unit, wherein the pipeline is partitioned into base pipeline stages and enhanced pipeline stages according to functions, the base pipeline stages being activated all the while, and the enhanced pipeline stages being activated or shutdown according to requirements for performance of a workload. The present invention further discloses a method of processing instructions in a pipeline-based central processing unit, wherein the pipeline is partitioned into base pipeline stages and enhanced pipeline stages according to functions, each pipeline stage being partitioned into a base module and at least one enhanced module, the base module being activated all the while, and the enhanced module being activated or shutdown according to requirements for performance of a workload.

First claim

The invention claimed is:

1. A method for a pipeline-based processor, wherein the pipeline-based processor includes at least one pipeline, the at least one pipeline including a particular pipeline, the method comprising:
partitioning the particular pipeline into a plurality of pipeline stages based on one or more functions, the plurality of pipeline stages including one or more base pipeline stages and a plurality of enhanced pipeline stages;
partitioning a particular pipeline stage of the plurality of pipeline stages into at least one base module and a plurality of enhanced modules, each base module of the at least one base module being a partitioned portion of the particular pipeline stage of the particular pipeline of the pipeline-based processor, each enhanced module of the plurality of enhanced modules being a partitioned portion of the particular pipeline stage of the particular pipeline of the pipeline-based processor, each enhanced module of the particular pipeline stage having a particular priority level of at least two different priority levels, at least one of the plurality of enhanced modules of the particular pipeline stage having a different priority level than at least one other of the plurality of enhanced modules, the at least two different priority levels including at least a highest priority level, the highest priority level having a relative priority higher than any other priority level of the at least two different priority levels, each of the at least one base module of the particular pipeline stage configured to be activated while the particular pipeline stage is activated;
configuring each of the plurality of enhanced modules to be activated or shut down based on the particular priority level of a corresponding particular enhanced module and requirements for performance of a workload, wherein at least one of the plurality of enhanced modules of the particular pipeline stage is configured to be activated while at least another of the plurality of enhanced modules of the particular pipeline stage is shut down;
determining each enhanced module of the particular pipeline stage to have one particular priority level of the at least two different priority levels according to a performance-to-power consumption ratio of a particular enhanced module, wherein a relatively high performance-to-power consumption ratio corresponds to a relatively high priority level; and
configuring two or more of the plurality of enhanced modules of the particular pipeline stage to be activated in a high-to-tow order of the at least two different priority levels when the workload increases.

2. The method of claim 1 , further comprising:
configuring a lookup table to store priority level information of the plurality of enhanced modules of the particular pipeline stage.

3. The method of claim 1 , wherein a particular enhanced module of the particular pipeline stage having the highest priority level has a higher performance-to-power consumption ratio than any other enhanced module having another priority level.

4. The method of claim 1 , wherein a base module of a particular base pipeline stage executes a smallest function of the particular base pipeline stage.

5. The method of claim 1 , wherein an enhanced module of a particular base pipeline stage enhances one or more functions of the particular base pipeline stage.

6. The method of claim 1 , wherein a base module of a particular enhanced pipeline stage enables data to pass through the particular enhanced pipeline stage without being changed.

7. The method of claim 1 ,
wherein each enhanced pipeline stage has an enhanced stage priority level of at least two different enhanced stage priority levels, the at least two different enhanced stage priority levels including at least a highest enhanced stage priority level, the highest enhanced stage priority level having a relative enhanced stage priority higher than any other enhanced stage priority level of the at least two different enhanced stage priority levels, the method further comprising:
configuring each enhanced pipeline stage of the plurality of enhanced pipeline stages to be activated or shut down based on the enhanced stage priority level of each enhanced pipeline stage and requirements for performance of the workload.

8. The method of claim 1 , further comprising:
configuring each enhanced pipeline stage of the plurality of enhanced pipeline stages to be activated or shut down.

9. The method of claim 1 , wherein partitioning a particular pipeline stage of the plurality of pipeline stages into at least one base module and a plurality of enhanced modules further comprises:
partitioning a base pipeline stage into at least one base module and plurality of enhanced modules.

10. The method of claim 1 , wherein partitioning a particular pipeline stage of the plurality of pipeline stages into at least one base module and a plurality of enhanced modules further comprises:
partitioning an enhanced pipeline stage into at least one base module and a plurality of enhanced modules.

11. The method of claim 1 , wherein each enhanced pipeline stage is configured to be either a shutdown enhanced pipeline stage or an activated enhanced pipeline stage, all functions of each shutdown enhanced pipeline stage being not activated, at least one function of each activated enhanced pipeline stage being activated, wherein at least one of the plurality of enhanced pipeline stages is configured to be activated while at least another of the plurality of enhanced pipeline stages is shut down.

12. A pipeline-based processor, comprising:
at least one pipeline, the at least one pipeline at least including a particular pipeline, wherein the particular pipeline is partitioned into a plurality of pipeline stages based on one or more functions, the plurality of pipeline stages including one or more base pipeline stages and a plurality of enhanced pipeline stages, a particular pipeline stage of the plurality of pipeline stages including at least one base module and a plurality of enhanced modules, each base module of the at least one base module being a partitioned portion of the particular pipeline stage of the particular pipeline of the pipeline-based processor, each enhanced module of the plurality of enhanced modules being a partitioned portion of the particular pipeline stage of the particular pipeline of the pipeline-based processor, each of the at least one base module of the particular pipeline stage being activated while the particular pipeline stage is activated, each enhanced module of the particular pipeline stage having a particular priority level of at least two different priority levels, at least one of the plurality of enhanced modules of the particular pipeline stage having a different priority level than at least one other of the plurality of enhanced modules, the at least two different priority levels including at least a highest priority level, the highest priority level having a relative priority higher than any other priority level of the at least two different priority levels, wherein each priority level is determined according to a performance-to-power consumption ratio of a particular enhanced module of the particular pipeline stage, wherein a relatively high performance-to-power consumption ratio corresponds to a relatively high priority level; and
a controller circuit, the controller circuit being configured to activate or shut down each enhanced module of the plurality of enhanced modules of the particular pipeline stage based on the particular priority level of a corresponding particular enhanced module of the particular pipeline stage and requirements for performance of a workload, wherein

Assignees

• Shen Wen Bo
• Shao Peng
• Li Yu
• Chang Xiao Tao
• Ge Yi
• Wang Hua Yong
• Zou Huan Hao
• IBM

Inventors

• Shen Wen Bo
• Shao Peng
• Li Yu
• Chang Xiao Tao
• Ge Yi
• Wang Hua Yong
• Zou Huan Hao

Classifications

• G06F9/3867 Primary

  using instruction pipelines · CPC title

• G06F1/3287 Primary

  by switching off individual functional units in the computer system · CPC title

• G06F9/3885

  using a plurality of independent parallel functional units · CPC title

• G06F11/30

  Monitoring · CPC title

• G06F13/18

  based on priority control (G06F13/1605 takes precedence) · CPC title