SYSTEM AND METHOD FOR MANAGING CODE DISPLACEMENT

• US 20080163169A1
• Filed: 12/27/2006
• Published: 07/03/2008
• Est. Priority Date: 12/27/2006
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Alcott, Thomas J., Polozoff, Alexandre, Bhogal, Kulvir Singh, McGee, Jason Robert
• Granted Patent: US 9,274,921 B2
• Time in Patent Office: Days
• US Class Current: 717/120
• CPC Class Codes: G06F 11/3409 for performance assessment
• CPC Class Codes: G06F 11/3433 for load management allocation of a server based on load conditions G06F9/505; load rebalancing G06F9/5083; redistributing the load in a network by a load balancer H04L67/1029
• CPC Class Codes: G06F 11/3466 Performance evaluation by tracing or monitoring
• CPC Class Codes: G06F 2201/81 Threshold
• CPC Class Codes: G06F 2201/865 Monitoring of software
• CPC Class Codes: G06F 9/5038 considering the execution order of a plurality of tasks, e.g. taking priority or time dependency constraints into consideration scheduling strategies G06F9/4881 and subgroups

Abstract

A system for managing code displacement may include a manager and an application operable on a server. The application may include a plurality of modules each module for performing a different operation. The system may also include priority information associated with each module to permit the manager to deactivate selected ones of the modules based on the priority information to improve performance of the application.

Claims

1. A system for managing code displacement, comprising:

a manager;

an application operable on a server, wherein the application includes a plurality of modules each to perform a different operation; and

priority information associated with each module to permit the manager to deactivate selected ones of the modules based on the priority information to improve performance of the application.

2. The system of claim 1, further comprising a type of replacement associated with each module.

3. The system of claim 2, wherein the type of replacement comprises one of a no operation (NOP) type function and a cached return value function to be returned in response to a deactivated module being called and wherein this type of replacement is associated with the deactivated module.

4. The system of claim 1, wherein the priority information comprises a level of desirability for the associated module to execute based on an importance of the associated module to the application.

5. The system of claim 4, further comprising a property file including an identity of each module, the importance associated with each module, and a type of replacement associated with each module.

6. The system of claim 1, further comprising a code injection to be injected to disable a selected module in response to a load on the application exceeding a predetermined threshold, and wherein the code injection is removed to reactivate the selected module in response to the load falling below the predetermined threshold.

7. The system of claim 1, wherein the manager comprises a data structure to inject and remove the code injection from the selected module.

8. A method for managing code displacement, comprising:

monitoring a load on an application, wherein the application includes a plurality of modules; and

deactivating a selected number of modules based on a predetermined basis associated with each module in response to the load on the application exceeding a predetermined threshold.

9. The method of claim 8, further comprising reactivating a chosen number of modules based on the predetermined basis in response to the load falling below a preset threshold.

10. The method of claim 9, wherein the predetermined basis comprises at least one of a priority of operation of the module, a level of importance of the module to the application, and a desirability of execution of the module during operation of the application.

11. The method of claim 8, further comprising determining a type of replacement associated with each module to be returned in response to a deactivated module being called.

12. The method of claim 8, further comprising returning one of a group of types of replacements including a no operation (NOP) type function and a cached return value function, in response to a deactivated module being called and one of these types of replacements being associated with the deactivated module.

13. The method of claim 8, further comprising:

injecting a code injection to deactivate each module; and

removing the code injection to reactivate each module in response to the load falling below a preset threshold.

14. The method of claim 8, further comprising determining a type of code to be injected to deactivate a particular module.

15. The method of claim 14, wherein determining the type of code comprises determining one of a group comprising an NOP code, a cache return value code and an alternate code.

16. A computer program product for managing code displacement, the computer program product comprising:

a computer usable medium having computer usable program code embodied therein, the computer usable medium comprising;

computer usable program code configured to monitor a load on an application, wherein the application includes a plurality of modules; and

computer usable program code configured to deactivate a selected number of modules based on a predetermined basis associated with each module in response to the load on the application exceeding a predetermined threshold.

17. The computer program product of claim 16, wherein the computer usable medium further comprises computer usable program code configured to reactivate a chosen number of modules based on the predetermined basis in response to the load falling below a preset threshold.

18. The computer program product of claim 16, wherein the computer usable medium further comprises computer usable program code configured to determine a type of replacement associated with each module to be returned in response to a deactivated module being called.

19. The computer program product of claim 16, wherein the computer usable medium further comprises:

computer usable program code configured to inject a code injection to deactivate each module; and

computer usable program code configured to remove the code injection to reactivate each module in response to the load falling below a preset threshold.

20. The computer program product of claim 16, wherein the computer usable medium further comprises computer usable program code configured to determine a type of code to be injected to deactivate a particular module.