Process management

• US 20060015872A1
• Filed: 03/08/2005
• Published: 01/19/2006
• Est. Priority Date: 07/13/2004
• Status: Abandoned Application

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Hamilton, Eric W., Pohl, William N., Parekh, Harshadrai G.
• Application Number:
  US11/074,983
• Publication Number:
  US 20060015872A1
• Time in Patent Office: Days
• US Class Current: 718/100
• CPC Class Codes: G06F 9/4843 by program, e.g. task dispatcher, supervisor, operating system

Abstract

Systems, methods, and device are provided for process management. One method embodiment includes, in a system process, starting an orphan collector thread (OCT) which is dedicated to cleaning up orphaned children processes adopted by the system process. The orphaned children processes are flagged when adopted by the system process. The OCT will execute a function call to clean up only processes which are flagged as having been adopted by the system process and which have terminated.

Claims

1. A method for process management on a computing device, comprising:

initiating a system process, including starting a thread to be executed by a physical processor;

in association with initiating the system process, starting an orphan collection thread (OCT); and

wherein the OCT is only responsible for cleaning up processes that have terminated and been assigned to the system process.

2. The method of claim 1, further including associating a flag with processes that have terminated and been assigned to the system process.

3. The method of claim 1, further including providing a system call to only clean up processes which have a flag indicating a process has been adopted by the system process and has terminated.

4. The method of claim 1, further including adding an option to a system wait call to only clean up processes which are flagged as having been adopted by the system process and which have terminated.

5. The method of claim 1, wherein the OCT can be run on a different physical processor.

6. A computer readable medium having a program to cause a device to perform a method, comprising:

in a system process, starting an orphan collector thread (OCT) which is dedicated to cleaning up orphaned children processes adopted by the system process; and

wherein the OCT will execute a function call to clean up orphaned children processes only after a selectable number of non-reaped orphaned children processes have been adopted by the system process.

7. The medium of claim 6, wherein the OCT will release a processor resource being used to clean up orphaned children processes after a selectable number of orphaned children processes have been cleaned up.

8. The medium of claim 7, wherein the OCT becomes idle when the OCT is not cleaning up orphaned children processes.

9. The medium of claim 8, wherein the method further includes starting additional OCTs at one or more various, selectable thresholds representing a number of orphaned processes which have been adopted by the system process and are awaiting to be cleaned up.

10. The medium of claim 6, wherein the OCT is a secondary thread that can be run on a physical processor different from a processor on which a primary thread of the system process is running.

11. The medium of claim 6, wherein the OCT is a portable operating system interface for Unix (posix) thread on a global system wide list.

12. A multithreaded computing system, comprising:

a first processor;

a second processor

a memory coupled to the first and the second processors; and

program instructions provided to the memory and executable by the system to;

initiate a system process, including starting a first thread to be executed by the first processor; and

in association with initiating the system process, starting an orphan collection thread (OCT) which can be executed on the second processor;

wherein the OCT is only responsible for cleaning up orphaned processes.

13. The system of claim 12, wherein the OCT is executed to wait on orphaned processes once a first threshold has been reached.

14. The system of claim 13, wherein the first threshold is variably established the based on user input.

15. The system of claim 14, wherein the first threshold is associated with a number representing how many non-reaped orphaned processes have been given to the system process.

16. The system of claim 12, wherein the program instructions further execute to start one or more additional OCTs to wait on orphaned processes once one or more second thresholds have been reached.

17. The system of claim 16, wherein one or more second thresholds are variably established the based on user input.

18. The system of claim 17, wherein the one or more second thresholds are associated with one or more additional numbers representing how many non-reaped orphaned processes have been given to the system process.

19. The system of claim 12, wherein the OCT includes a set of executable instructions which are contained in fewer than fifty lines of code.

20. A computing device, comprising:

a processor;

a memory coupled to the processor; and

program instructions provided to the memory and executable by the processor, the program instructions are part of a process management system to;

in a system process, starting an orphan collector thread (OCT) which is dedicated to cleaning up orphaned children processes adopted by the system process; and

wherein the OCT will execute a function call to clean up orphaned children processes only after a selectable number of non reaped orphaned children processes have been adopted by the system process.

21. The device of claim 20, wherein the OCT will release a processor resource being used to clean up orphaned children processes after a selectable number of orphaned children processes have been cleaned up.

22. The device of claim 21, wherein the OCT becomes idle when the OCT is not cleaning up orphaned children processes.

23. The device of claim 20, wherein the program instructions execute to start additional OCTs at one or more various, selectable thresholds representing a number of non reaped orphaned processes which have been adopted by the system process and are awaiting to be cleaned up.

24. The device of claim 20, wherein the OCT is a secondary thread that can be run on a physical processor different from a processor on which a primary thread of the system process is running.

25. The device of claim 20, wherein the OCT is a portable operating system interface for Unix thread on a global system wide list.

26. A process management system, comprising:

means for dedicating a thread in a system process to cleaning up orphaned children processes given to the system process; and

means for scaling various thresholds at which the thread executes to clean up orphaned children processes given to the system process.