THREAD SERIALIZATION AND DISABLEMENT TOOL

• US 20120254840A1
• Filed: 03/26/2012
• Published: 10/04/2012
• Est. Priority Date: 11/23/2009
• Status: Active Grant

• Current Assignee: Taiwan Semiconductor Manufacturing Company Limited
• Original Assignee: International Business Machines Corporation
• Inventors: KRAUSS, KIRK J.
• Granted Patent: US 8,806,445 B2
• Time in Patent Office: Days
• US Class Current: 717/130
• CPC Class Codes: G06F 11/3466 Performance evaluation by tracing or monitoring
• CPC Class Codes: G06F 2201/865 Monitoring of software
• CPC Class Codes: G06F 9/4881 Scheduling strategies for dispatcher, e.g. round robin, multi-level priority queues

Abstract

A computer-implemented method of performing runtime analysis on and control of a multithreaded computer program. One embodiment of the present invention can include identifying threads of a computer program to be analyzed. With a supervisor thread, execution of the identified threads can be controlled and execution of the identified threads can be monitored to determine a status of the identified threads. An indicator corresponding to the determined status of the threads can be output.

Claims

1. A method of performing runtime analysis on and runtime control of a multithreaded computer program, the method comprising:

identifying threads of a computer program to be analyzed;

with a supervisor thread, controlling, using a processor, an execution of the identified threads;

monitoring the execution of the identified threads to determine a status of the identified threads; and

presenting in a user interface that is presented on a display at least one indicator corresponding to the determined status of the identified threads.

2. The method of claim 1, wherein:

controlling execution of the identified threads comprises assigning a management lock to the identified threads to control when the identified threads are executed; and

controlling execution of the identified threads comprises executing the identified threads in accordance with the management lock.

3. The method of claim 2, wherein presenting in the user interface that is presented on the display at least one indicator corresponding to the determined status of the identified threads comprises:

presenting at least one thread status indicator that indicates which of the identified threads is waiting to receive ownership of the management lock.

4. The method of claim 1, wherein controlling execution of the identified threads comprises:

serializing execution of a plurality of threads that are not limited to serialized execution when the computer program is executed without use of a management lock or a runtime analysis module.

5. The method of claim 1, wherein monitoring the execution of the identified threads comprises:

instrumenting the computer program to track use of CPUT locks by the computer program; and

performing runtime analysis on the tracked use of the CPUT locks.

6. The method of claim 1, wherein monitoring the execution of the identified threads comprises:

instrumenting the computer program to track events for each of the identified threads of the computer program; and

performing runtime analysis on the tracked events.

7. The method of claim 1, wherein controlling execution of the identified threads comprises:

allocating a management lock exclusively for ownership by one of the threads at a time; and

revoking ownership of the management lock exclusively when there is no processor activity detected for the thread to which the management lock is allocated.

8. The method of claim 7, further comprising:

receiving a user request to disable execution of at least one thread selected from the identified threads;

queuing the user request until the selected thread no longer holds any management locks; and

when the selected thread no longer holds any locks, assigning ownership of a management lock to a second thread;

wherein the assignment of the management lock to the second thread disables execution of the selected thread until the selected thread is assigned ownership of the management lock.

9. The method of claim 1, wherein controlling execution of the identified threads comprises:

allocating a management lock for shared ownership by a plurality of the threads; and

revoking ownership of the management lock from a first of the plurality of the threads when there is no processor activity detected for the first thread.

10. The method of claim 1, further comprising:

receiving a user input that indicates, for each of a plurality of the identified threads, a respective thread priority to be assigned; and

assigning each of the respective thread priorities to a corresponding one of the identified threads;

wherein controlling execution of the identified threads comprises;

executing the identified threads in an order that is determined from the assigned thread priorities.

11-20. -20. (canceled)