Methods for execution control acquistion of a program and for executing an optimized version of a program

• US 7,318,222 B2
• Filed: 08/27/2003
• Issued: 01/08/2008
• Est. Priority Date: 08/27/2003
• Status: Active Grant

• Current Assignee: Oracle America, Inc. (Oracle Corporation)
• Original Assignee: Sun Microsystems Incorporated (Oracle Corporation)
• Inventors: Civlin, Jan
• Primary Examiner(s): INGBERG, TODD D
• Application Number:
  US10/650,190
• Publication Number:
  US 20050050530A1
• Time in Patent Office: 1,595 Days
• Field of Search: 717/151, 717/128, 717/154, 718/103, 718/108, 711/128, 714/47
• US Class Current: 717/151
• CPC Class Codes: G06F 9/45525 Optimisation or modification within the same instruction set architecture, e.g. HP Dynamo
• CPC Class Codes: G06F 9/4812 by interrupt, e.g. masked

Abstract

In a method for execution control acquisition of a program, during the execution of the program, it is determined when a hardware performance counter has reached a threshold. When the threshold is reached, execution control is switched to a dynamic optimizer. Thereafter, an optimized version of the program is executed. In a method for executing an optimized version of a program, during execution of the optimized version, an interrupt is received and execution control is returned to an operating system. An original version of the program is then executed. During the execution of the original version, a hardware performance counter is monitored. When the hardware performance counter reaches a threshold during the execution of the original version, execution control is switched to a dynamic optimizer. Thereafter, the execution of the optimized version of the program is continued as directed by the dynamic optimizer.

Claims

1. A method for executing an optimized version of a program, comprising:

executing an optimized version of a program;

receiving an interrupt during execution of the optimized version of the program and returning execution control to an operating system;

executing an original version of the program;

monitoring a hardware performance counter during the executing of the original version of the program;

when the hardware performance counter reaches a threshold during the executing of the original version of the program, switching execution control to a dynamic optimizer; and

continuing the executing of the optimized version of the program as directed by the dynamic optimizer.

2. The method of claim 1, wherein the executing of the optimized version of the program includes executing an optimized binary code file for the program.

3. The method of claim 1, wherein the executing of the original version of the program includes executing original binary code for the program.

4. The method of claim 1, wherein the hardware performance counter is selected from the group consisting of an instruction counter and a cycle counter.

5. The method of claim 1, wherein the hardware performance counter is a cycles per instruction counter.

6. The method of claim 1, wherein the threshold is set to a value that is indicative of unacceptable performance.

7. The method of claim 1, wherein the hardware performance counter is integrated into a central processing unit.

8. Computer readable media having encoded thereon a computer program including a set of program instructions for causing a computer to execute an optimized version of a program, the computer program comprising:

program instructions for executing an optimized version of a program;

program instructions for receiving an interrupt during execution of the optimized version of the program and returning execution control to an operating system;

program instructions for executing an original version of the program;

program instructions for monitoring a hardware performance counter during the executing of the original version of the program;

program instructions for switching execution control to a dynamic optimizer when the hardware performance counter reaches a threshold during the executing of the original version of the program; and

program instructions for continuing the executing of the optimized version of the program as directed by the dynamic optimizer.

9. The computer readable media of claim 8, wherein the executing of the optimized version of the program includes executing an optimized binary code file for the program.

10. The computer readable media of claim 8, wherein the executing of the original version of the program includes executing original binary code for the program.

11. The computer readable media of claim 8, wherein the hardware performance counter is selected from the group consisting of an instruction counter, a cycle counter, and a cycles per instruction counter.

12. The computer readable media of claim 8, wherein the threshold is set to a value that is indicative of unacceptable performance.

13. A method for executing an optimized version of a program, comprising:

executing an optimized binary code file for a program;

receiving an interrupt during execution of the optimized binary code file for the program and returning execution control to an operating system;

executing original binary code for the program;

monitoring a hardware performance counter during the executing of the original binary code for the program;

when the hardware performance counter reaches a threshold that is indicative of unacceptable performance during the executing of the original binary code for the program, switching execution control to a dynamic optimizer; and

continuing the executing of the optimized binary code file for the program as directed by the dynamic optimizer.

14. The method of claim 13, wherein the hardware performance counter is selected from the group consisting of an instruction counter and a cycle counter.

15. The method of claim 13, wherein the hardware performance counter is a cycles per instruction counter.

16. The method of claim 13, wherein the hardware performance counter is integrated into a central processing unit.

17. Computer readable media having encoded thereon a computer program including a set of program instructions for causing a computer to execute an optimized version of a program, the computer program comprising:

program instructions for executing an optimized binary code file for a program;

program instructions for receiving an interrupt during execution of the optimized binary code file for the program and returning execution control to an operating system;

program instructions for executing original binary code for the program;

program instructions for monitoring a hardware performance counter during the executing of the original binary code for the program;

program instructions for switching execution control to a dynamic optimizer when the hardware performance counter reaches a threshold that is indicative of unacceptable performance during the executing of the original binary code for the program; and

program instructions for continuing the executing of the optimized binary code file for the program as directed by the dynamic optimizer.

18. The computer readable media of claim 17, wherein the hardware performance counter is selected from the group consisting of an instruction counter, a cycle counter, and a cycles per instruction counter.