Systems and methods for memory power saving via kernel steering to memory balloons

Patent metadata

Field	Value
Publication number	US-10310757-B2
Application number	US-201715684838-A
Country	US
Kind code	B2
Filing date	Aug 23, 2017
Priority date	Aug 23, 2017
Publication date	Jun 4, 2019
Grant date	Jun 4, 2019

Abstract

Systems, methods, and computer programs are disclosed for reducing memory power consumption. An exemplary method comprises configuring a power saving memory balloon associated with a volatile memory. Memory allocations are steered to the power saving memory balloon. In response to initiating a memory power saving mode, data is migrated from the power saving memory balloon. A power saving feature is executed on the power saving memory balloon while in the memory power saving mode.

First claim

What is claimed is:

1. A method for reducing memory power consumption in a volatile memory, the method comprising:
configuring a plurality of power saving memory balloons associated with the volatile memory;
steering memory allocations to the plurality of power saving memory balloons, the memory allocations including movable pages migratable to other power saving memory balloons and non-movable pages not migratable to other power saving memory balloons;
in response to initiating a memory power saving mode, determining which of the plurality of power saving memory balloons is preferred over others of the plurality of power saving memory balloons to execute a memory power saving feature on, wherein the determination is based at least in part on whether a power saving memory balloon is allocated one or more non-movable pages;
cleaning up data from the preferred power saving memory balloon; and
executing the memory power saving feature on the preferred power saving memory balloon while in the memory power saving mode.

2. The method of claim 1 , wherein the volatile memory comprises a dynamic random access memory (DRAM).

3. The method of claim 1 , wherein a size of the power saving memory balloon is determined by a memory monitor.

4. The method of claim 1 , wherein the determination is based on, for each power saving memory balloon, whether the power saving memory balloon is allocated one or more non-movable pages and how many pages are active in the power saving memory balloon.

5. The method of claim 1 , wherein the memory allocations are steered to the power saving memory balloon based on one or more user-defined parameters specified via a user interface.

6. The method of claim 1 , wherein the power saving mode comprises one of a DRAM rank power down, a partial array self refresh, or partial array active refresh.

7. The method of claim 1 , wherein the memory power saving mode is initiated by a user command, a user-specified condition, or a remaining battery threshold.

8. A system for reducing memory power consumption in a volatile memory, the system comprising:
means for configuring a plurality of power saving memory balloons associated with the volatile memory;
means for steering memory allocations to the plurality of power saving memory balloons the memory allocations including movable pages migratable to other power saving memory balloons and non-movable pages not migratable to other power saving memory balloons;
means for, in response to initiating a memory power saving mode, determining which of the plurality of power saving memory balloons is preferred over others of the plurality of power saving memory balloons to execute a memory power saving feature on, wherein the determination is based at least in part on whether a power saving memory balloon is allocated one or more non-movable pages;
means for migrating data from the preferred power saving memory balloon; and
means for executing the memory power saving feature on the preferred power saving memory balloon while in the memory power saving mode.

9. The system of claim 8 , wherein the volatile memory comprises a dynamic random access memory (DRAM).

10. The system of claim 8 , wherein a size of the power saving memory balloon is determined by a means for monitoring usage.

11. The system of claim 8 , wherein the determination is based on, for each power saving memory balloon, whether the power saving memory balloon is allocated one or more non-movable pages and how many pages are active in the power saving memory balloon.

12. The system of claim 8 , wherein the memory allocations are steered to the power saving memory balloon based on one or more user-defined parameters specified via a user interface.

13. The system of claim 8 , wherein the power saving feature comprises one of a rank power down, partial array self refresh, and partial array auto refresh.

14. The system of claim 8 , wherein the memory power saving mode is initiated by a user command, a user-specified condition, or a remaining battery threshold.

15. A system for reducing memory power consumption, the system comprising:
a volatile random access memory; and
a system on chip (SoC) comprising a memory controller and a kernel memory manager, the memory controller electrically coupled to the volatile random access memory, and the kernel memory manager comprising logic configured to:
configure a plurality of power saving memory balloons associated with the volatile memory;
steer memory allocations to the plurality of power saving memory balloons, the memory allocations including movable pages migratable to other power saving memory balloons and non-movable pages not migratable to other power saving memory balloons;
in response to initiating a memory power saving mode, determine which of the plurality of power saving memory balloons is preferred over others of the plurality of power saving memory balloons to execute a memory power saving feature on, wherein the determination is based at least in part on whether a power saving memory balloon is allocated one or more non-movable pages;
migrate data from the preferred power saving memory balloon; and
execute the memory power saving feature on the preferred power saving memory balloon while in the memory power saving mode.

16. The system of claim 15 , wherein the volatile memory comprises a dynamic random access memory (DRAM).

17. The system of claim 15 , wherein a size of the power saving memory balloon is determined by a memory monitor.

18. The system of claim 15 , wherein the determination is based on, for each power saving memory balloon, whether the power saving memory balloon is allocated one or more non-movable pages and how many pages are active in the power saving memory balloon.

19. The system of claim 15 , wherein the memory allocations are steered to the power saving memory balloon based on one or more user-defined parameters specified via a user interface.

20. The system of claim 15 , wherein the power saving mode comprises one of a rank power down, a partial array self refresh, or a partial array auto refresh.

21. The system of claim 15 , wherein the memory power saving mode is initiated by a user command, a user-specified condition, or a remaining battery threshold.

22. The system of claim 15 incorporated in a portable computing device.

23. The system of claim 15 , wherein the portable computing device comprises one of a tablet computer, a smart phone, and a wearable computing device.

24. A computer program embodied in a non-transitory computer readable medium and executed by a processor for reducing memory power consumption in a volatile memory, the computer program comprising logic configured to:
configure a plurality of power saving memory balloons associated with the volatile memory;
steer memory allocations to the plurality of power saving memory balloons, the memory allocations including movable pages migratable to other power saving memory balloons and non-movable pages not migratable to other power saving memory balloons;
in response to initiating a memory power saving mode, determine which of the plurality of power saving memory balloons is preferred over others of the plurality of power saving memory balloons to execute a memory power saving feature on, wherein the determination is based at least in part on whether a power saving memory balloon is allocated one or more non-movable pages;
migrate data from the preferred power saving memo

Assignees

• Qualcomm Inc

Inventors

• Li Yanru
• Bassel Larry
• Zeng Thomas
• Chun Dexter

Classifications

• G06F3/0647

  Migration mechanisms · CPC title

• G06F3/0673

  Single storage device · CPC title

• G06F3/0659

  Command handling arrangements, e.g. command buffers, queues, command scheduling · CPC title

• G06F3/0625 Primary

  Power saving in storage systems · CPC title

• G06F1/3225 Primary

  of memory devices · CPC title