Optimizing Just-In-Time Compiling For A Java Application Executing On A Compute Node

• US 20090271775A1
• Filed: 04/24/2008
• Published: 10/29/2009
• Est. Priority Date: 04/24/2008
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Barrington, David L., Barsness, Eric L., Santosuosso, John M., Peters, Amanda
• Granted Patent: US 8,397,225 B2
• Time in Patent Office: Days
• US Class Current: 717/151
• CPC Class Codes: G06F 8/41 Compilation
• CPC Class Codes: G06F 9/45516 Runtime code conversion or optimisation

Abstract

Methods, systems, and products are disclosed for optimizing just-in-time (‘JIT’) compiling for a Java application executing on a compute node, the compute node having installed upon it a Java Virtual Machine (‘JVM’) capable of supporting the Java application, that include: identifying, by an application manager, a particular portion of the Java application; assigning, by the application manager, a JIT level to the particular portion of the Java application; and jitting, by the JVM installed on the compute node, the particular portion of the Java application in dependence upon the JIT level assigned to that particular portion of the Java application.

Claims

1. A method of optimizing just-in-time (‘

JIT’

) compiling for a Java application executing on a compute node, the compute node having installed upon it a Java Virtual Machine (‘

JVM’

) capable of supporting the Java application, the method comprising;

identifying, by an application manager, a particular portion of the Java application;

assigning, by the application manager, a JIT level to the particular portion of the Java application; and

jitting, by the JVM installed on the compute node, the particular portion of the Java application in dependence upon the JIT level assigned to that particular portion of the Java application.

2. The method of claim 1 wherein the particular portion of the Java application further comprises a generic type of Java construct.

3. The method of claim 1 wherein the particular portion of the Java application further comprises a specific implementation of a Java construct.

4. The method of claim 1 wherein the particular portion of the Java application further comprises a Java call sequence for a particular Java method.

5. The method of claim 1 wherein assigning, by the application manager, a JIT level to the particular portion of the Java application further comprises establishing the JIT level for the particular portion of the Java application in dependence upon a historic JIT profile for the particular portion of the Java application and previous execution performance of the Java application.

6. The method of claim 1 wherein optimizing JIT compiling for a Java application executing on a compute node further comprises optimizing JIT compiling for a Java application executing on a parallel computer, the parallel computer comprising a plurality of compute nodes and a service node, the application manager installed upon the service node, the plurality of compute nodes connected for data communications through a plurality of data communications networks, at least one data communications network optimized for collective operations, and at least one other data communications network optimized for point to point operations.

7. A compute node capable of optimizing just-in-time (‘

JIT’

) compiling for a Java application, the compute node having installed upon it a Java Virtual Machine (‘

JVM’

) capable of supporting the Java application, the compute node comprising a computer processor and computer memory operatively coupled to the computer processor, the computer memory for the compute node having disposed within it computer program instructions capable of;

identifying a particular portion of the Java application;

assigning a JIT level to the particular portion of the Java application; and

jitting, by the JVM installed on the compute node, the particular portion of the Java application in dependence upon the JIT level assigned to that particular portion of the Java application.

8. The compute node of claim 7 wherein the particular portion of the Java application further comprises a generic type of Java construct.

9. The compute node of claim 7 wherein the particular portion of the Java application further comprises a specific implementation of a Java construct.

10. The compute node of claim 7 wherein the particular portion of the Java application further comprises a Java call sequence for a particular Java method.

11. The compute node of claim 7 wherein assigning, by the application manager, a JIT level to the particular portion of the Java application further comprises establishing the JIT level for the particular portion of the Java application in dependence upon a historic JIT profile for the particular portion of the Java application and previous execution performance of the Java application.

12. The compute node of claim 7 wherein optimizing JIT compiling for a Java application executing on a compute node further comprises optimizing JIT compiling for a Java application executing on a parallel computer, the parallel computer comprising a plurality of compute nodes and a service node, the application manager installed upon the service node, the plurality of compute nodes connected for data communications through a plurality of data communications networks, at least one data communications network optimized for collective operations, and at least one other data communications network optimized for point to point operations.

13. A computer program product for optimizing just-in-time (‘

JIT’

) compiling for a Java application executing on a compute node, the compute node having installed upon it a Java Virtual Machine (‘

JVM’

) capable of supporting the Java application, the computer program product disposed upon a computer readable medium, the computer program product comprising computer program instructions capable of;

identifying, by an application manager, a particular portion of the Java application;

assigning, by the application manager, a JIT level to the particular portion of the Java application; and

jitting, by the JVM installed on the compute node, the particular portion of the Java application in dependence upon the JIT level assigned to that particular portion of the Java application.

14. The computer program product of claim 13 wherein the particular portion of the Java application further comprises a generic type of Java construct.

15. The computer program product of claim 13 wherein the particular portion of the Java application further comprises a specific implementation of a Java construct.

16. The computer program product of claim 13 wherein the particular portion of the Java application further comprises a Java call sequence for a particular Java method.

17. The computer program product of claim 13 wherein assigning, by the application manager, a JIT level to the particular portion of the Java application further comprises establishing the JIT level for the particular portion of the Java application in dependence upon a historic JIT profile for the particular portion of the Java application and previous execution performance of the Java application.

18. The computer program product of claim 13 wherein optimizing JIT compiling for a Java application executing on a compute node further comprises optimizing JIT compiling for a Java application executing on a parallel computer, the parallel computer comprising a plurality of compute nodes and a service node, the application manager installed upon the service node, the plurality of compute nodes connected for data communications through a plurality of data communications networks, at least one data communications network optimized for collective operations, and at least one other data communications network optimized for point to point operations.

19. The computer program product of claim 13 wherein the computer readable medium comprises a recordable medium.

20. The computer program product of claim 13 wherein the computer readable medium comprises a transmission medium.