Thread classification suspension

• US 8,627,327 B2
• Filed: 10/24/2007
• Issued: 01/07/2014
• Est. Priority Date: 10/24/2007
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Dunshea, Andrew, Griffith, Douglas James
• Primary Examiner(s): KAWSAR, ABDULLAH AL
• Application Number:
  US11/923,360
• Publication Number:
  US 20090113433A1
• Time in Patent Office: 2,267 Days
• Field of Search: None
• US Class Current: 718/104
• CPC Class Codes: G06F 9/485 Task life-cycle, e.g. stopping, restarting, resuming execution G06F9/4881 takes precedence
• CPC Class Codes: G06F 9/5016 the resource being the memory
• CPC Class Codes: G06F 9/5022 Mechanisms to release resources

Abstract

The exemplary embodiments provide a computer-implemented method, apparatus, and computer-usable program code for managing memory. A notice of a shortage of real memory is received. For each active thread, the thread classification of the active thread is compared to a global hierarchy of thread classifications to determine a thread to affect. The global hierarchy of thread classifications defines the relative importance of each thread classification. An action to take for the determined thread is determined. The determined action is performed for the determined thread.

Claims

1. A computer-implemented method for managing memory, the computer-implemented method comprising:

monitoring memory usage while running a plurality of applications and each individual application of the plurality of the applications comprised of a plurality of active threads;

receiving a notice of a shortage of real memory while running the plurality of applications;

establishing a global hierarchy of thread classifications for the plurality of active threads of the each individual application and a default thread classification for any process not classified by an application running on a computer;

responsive to receiving the notice, comparing, for each active thread of the plurality of applications, a thread classification of the plurality of active threads to the global hierarchy of thread classifications, wherein the global hierarchy of thread classifications defines a relative importance of each thread classification based on a classification of a process currently being performed by each active thread of the each individual application, an identification of a user performing the process and process executables, to identify a selected thread to affect, wherein the classification of the process is determined by the each individual application comprising the active threads;

determining an action to take for the selected thread to form a determined action; and

performing the determined action for the selected thread.

2. The computer-implemented method of claim 1, further comprising:

receiving the thread classification from a thread; and

storing the thread classification for the thread.

3. The computer-implemented method of claim 2, further comprising:

receiving a new thread classification from the thread; and

updating the thread classification for the thread.

4. The computer-implemented method of claim 1, further comprising:

creating a default thread classification; and

receiving at least one thread classification for at least one application.

5. The computer-implemented method of claim 4, further comprising:

creating the global hierarchy of thread classifications based on the default classification and the received at least one thread classification.

6. The computer-implemented method of claim 1, wherein the thread classification is based on a workload of the thread.

7. The computer-implemented method of claim 1, wherein the determined action is to kill the determined thread.

8. The computer-implemented method of claim 1, further comprising:

performing the action indicated in the global hierarchy of thread classification for each selected thread.

9. A computer program product comprising:

a computer-readable storage device storing computer-usable program code for managing memory, the computer program product comprising;

computer-usable program code for monitoring memory usage while running a plurality of applications and each individual application of the plurality of applications comprised of a plurality of active threads;

computer-usable program code for receiving a notice of a shortage of real memory while running the plurality of applications;

computer-usable program code for establishing a global hierarchy of thread classifications for the plurality of applications of the each individual application and a default thread classification for any process not classified by an application running on a computer;

computer-usable program code, responsive to receiving the notice, for comparing, for each active thread of the plurality of applications, a thread classification of the plurality of active threads to the global hierarchy of thread classifications, wherein the global hierarchy of thread classifications defines a relative importance of each thread classification based on a classification of a process currently being performed by each active thread of the each individual application, an identification of a user performing the process and process executables, to identify a selected thread to affect, wherein the classification of the process is determined by the each individual application comprising the active threads;

computer-usable program code for determining an action to take for the selected thread to form a determined action; and

computer-usable program code for performing the determined action for the selected thread.

10. The computer program product of claim 9, further comprising:

computer-usable program code for receiving the thread classification from a thread; and

computer-usable program code for storing the thread classification for the thread.

11. The computer program product of claim 10, further comprising:

computer-usable program code for receiving a new thread classification from the thread; and

computer-usable program code for updating the thread classification for the thread.

12. The computer program product of claim 9, further comprising:

computer-usable program code for creating a default thread classification; and

computer-usable program code for receiving at least one thread classification for at least one application.

13. The computer program product of claim 12, further comprising:

computer-usable program code for creating the global hierarchy of thread classifications based on the default classification and the received at least one thread classification.

14. The computer program product of claim 9, wherein the thread classification is based on a workload of a thread.

15. The computer program product of claim 9, wherein the determined action is to kill the determined thread.

16. A data processing system for managing memory, the data processing system comprising:

a bus;

a communications unit connected to the bus;

a storage device connected to the bus, wherein the storage device includes computer-usable program code; and

a processor unit connected to the bus, wherein the processor unit executes the computer-usable program code to monitor memory usage while running a plurality of applications and each individual application of the plurality of applications comprised of a plurality of active threads;

receive a notice of a shortage of real memory while running the plurality of applications;

establish a global hierarchy of thread classifications for the plurality of active threads of the each individual application and a default thread classification for any process not classified by an application running on a computer;

responsive to receiving the notice, compare, for each active thread of the plurality of applications, a thread classification of the plurality of active threads to the global hierarchy of thread classifications, wherein the global hierarchy of thread classifications defines a relative importance of each thread classification based on a classification of a process currently being performed by each active thread of the each individual application, an identification of a user performing the process and process executables, to identify a selected thread to affect, wherein the classification of the process is determined by the each individual application comprising the active threads;

determine an action to take for the selected thread to form a determined action; and

perform the determined action for the selected thread.

17. The data processing system of claim 16, wherein the processor further executes the computer-usable program code to receive the thread classification from a thread;

and

store the thread classification for the thread.

18. The data processing system of claim 17, wherein the processor further executes the computer-usable program code to receive a new thread classification from the thread;

and

update the thread classification for the thread.

19. The data processing system of claim 16, wherein the processor further executes the computer-usable program code to create a default thread classification;

and

receive at least one thread classification for at least one application.

20. The data processing system of claim 19, wherein the processor further executes the computer-usable program code to create the global hierarchy of thread classifications based on the default classification and the received at least one thread classification.

21. The data processing system of claim 16, wherein the thread classification is based on a workload of a thread.