MEMORY DATA MANAGEMENT

• US 20140359241A1
• Filed: 05/31/2013
• Published: 12/04/2014
• Est. Priority Date: 05/31/2013
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Dell, Timothy J., Dusanapudi, Manoj, Jayaraman, Prasanna, Lingambudi, Anil B.
• Granted Patent: US 9,043,569 B2
• Time in Patent Office: Days
• US Class Current: 711/165
• CPC Class Codes: G06F 11/3409 for performance assessment
• CPC Class Codes: G06F 11/348 Circuit details, i.e. tracer hardware
• CPC Class Codes: G06F 12/02 Addressing or allocation; Relocation program address sequencing G06F9/00; arrangements for selecting an address in a digital store G11C8/00
• CPC Class Codes: G06F 12/0223 User address space allocation, e.g. contiguous or non contiguous base addressing
• CPC Class Codes: G06F 12/023 Free address space management
• CPC Class Codes: G06F 12/06 Addressing a physical block of locations, e.g. base addressing, module addressing, memory dedication G06F12/08 takes precedence
• CPC Class Codes: G06F 2201/88 Monitoring involving counting
• CPC Class Codes: G06F 2212/2532 comprising a plurality of modules
• CPC Class Codes: G06F 3/0625 Power saving in storage systems
• CPC Class Codes: G06F 3/0647 Migration mechanisms
• CPC Class Codes: G11C 16/3495 Circuits or methods to detect or delay wearout of nonvolatile EPROM or EEPROM memory devices, e.g. by counting numbers of erase or reprogram cycles, by using multiple memory areas serially or cyclically

Abstract

A method and computer-readable storage media are provided for rearranging data in physical memory units. In one embodiment, a method may include monitoring utilization counters. The method may further include, comparing the utilization counters for a match with an instance in a first table containing one or more instances when data may be rearranged in the physical memory units. The table may further include where the data should be relocated by a rearrangement. The method may also include, continuing to monitor the utilization counters if a match is not found with an instance in the first table. The method may further include, rearranging the data in the physical memory units if a match between the utilization counters and an instance in the first table is found.

Claims

1. A computer implemented method for managing the use of physical memory units, comprising:

monitoring utilization counters;

comparing the utilization counters for a match with an instance in a first table containing one or more instances when data may be rearranged in the physical memory units and where the data should be relocated by a rearrangement;

continuing to monitor the utilization counters if a match is not found with an instance in the first table; and

rearranging the data in the physical memory units if a match between the utilization counters and an instance in the first table is found.

2. The method of claim 1, the rearrangement of data in the memory further comprising:

selecting an entity to rearrange the data;

rearranging the data in the physical memory units by the entity.

3. The method of claim 2, wherein the entity is a hypervisor.

4. The method of claim 2, wherein the entity is an operating system.

5. The method of claim 1, further comprising:

rearranging the data in physical memory units to modify a performance metric.

6. The method of claim 5, wherein the performance metric is power consumption.

7. The method of claim 5, wherein the performance metric is access speed.

8. The method of claim 5, wherein the performance metric is load balancing.

9. The method of claim 1, further comprising:

selecting the first table from a plurality of tables based upon a goal criteria.

10. The method of claim 1, wherein the physical memory units are a first and a second DIMM.

11. A computer-readable storage medium having executable code stored thereon to cause a machine to rearranging data in physical memory units, comprising:

monitoring utilization counters;

comparing the utilization counters for a match with an instance in a first table containing one or more instances when data may be rearranged in the physical memory units and where the data should be relocated by a rearrangement;

continuing to monitor the utilization counters if a match is not found with an instance in the first table; and

rearranging the data in the physical memory units if a match between the utilization counters and an instance in the first table is found.

12. The computer-readable storage medium of claim 11, the rearrangement of data in the physical memory units further comprising:

selecting an entity to rearrange the data;

rearranging the data in the physical memory units by the entity.

13. The computer-readable storage medium of claim 12, wherein the entity is a hypervisor.

14. The computer-readable storage medium of claim 12, wherein the entity is an operating system.

15. The computer-readable storage medium of claim 11, further comprising:

rearranging the data in the physical memory units to modify a performance metric.

16. The computer-readable storage medium of claim 15, wherein the performance metric is power consumption.

17. The computer-readable storage medium of claim 15, wherein the performance metric is access speed.

18. The computer-readable storage medium of claim 15, wherein the performance metric is load balancing.

19. The computer-readable storage medium of claim 11, further comprising:

selecting the first table from a plurality of tables based upon a goal criteria.

20. The computer-readable storage medium of claim 11, wherein the physical memory units are a first and a second DIMM.