PLACEMENT OF INSTRUCTIONS IN A MEMORY SYSTEM

• US 20140130022A1
• Filed: 11/05/2012
• Published: 05/08/2014
• Est. Priority Date: 11/05/2012
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Chen, Tong, O'Brien, John K., Sura, Zehra
• Granted Patent: US 8,863,099 B2
• Time in Patent Office: Days
• US Class Current: 717/140
• CPC Class Codes: G06F 8/41 Compilation
• CPC Class Codes: G06F 8/451 Code distribution considering CPU load at run-time G06F9/505; load rebalancing G06F9/5083

Abstract

According to one embodiment of the present invention, a method for operation of a computer system including a main processor, a first and a second active memory device includes receiving an executable module generated by a compiler, wherein the executable module includes a code section identified as executable by a first processing element in the first active memory device and a second processing element in the second active memory device. The method further includes copying the code section to memory in the first device based on the code section being executable on the first device, copying the code section from the memory in the first active memory device to an instruction buffer of the first processing element and copying the code section from the memory in the first device to the second device based on the code section being executable on the second device.

Claims

1. A method for executable module operating a computer system including a main processor, a first active memory device and a second active memory device, the method comprising:

receiving an executable module generated by a compiler, wherein the executable module comprises a first code section identified as executable by a first processing element in the first active memory device and a second processing element in the second active memory device;

copying the first code section to memory in the first active memory device based on the first code section being executable on the first active memory device;

copying the first code section from the memory in the first active memory device to an instruction buffer of the first processing element; and

copying the first code section from the memory in the first active memory device to the second active memory device based on the first code section being executable on the second active memory device.

2. The method of claim 1, wherein copying the first code section from the memory in the first active memory device to the second active memory device comprises copying the first code section from the memory in the first active memory device to a memory in the second active memory device.

3. The method of claim 2, further comprising copying the first code section from the memory in the second active memory device to a second instruction buffer in the second processing element.

4. The method of claim 2, further comprising executing the first code section by the first processing element and executing the first code section by the second processing element.

5. The method of claim 1, further comprising:

copying a second code section to the memory in the first active memory device, the second code section being part of the executable module;

copying the second code section from the memory in the first active memory device to the instruction buffer in the first processing element; and

copying the second code section from the memory in the first active memory device to a third active memory device, wherein the computer system further includes the third active memory device.

6. The method of claim 5, further comprising executing the second code section by the first processing element and executing the second code section by a third processing element in the third active memory device.

7. The method of claim 1, further comprising acquiring access to the first processing element and the second processing element prior to copying the first code section to memory in the first active memory device.

8. The method of claim 7, further comprising releasing the first processing element and the second processing element following execution of the first code section by the first processing element and the second processing element.

9-16. -16. (canceled)

17. A method for a compiler to produce an executable module to be executed by a computer system including a main processor and an active memory device, the method comprising:

dividing source code into code sections;

identifying, by the compiler, a first code section that is executable by the main processor and a processing element in the active memory device, wherein the first code section is one of the code sections; and

transforming, by the compiler, the first code section to executable module code for execution on the main processor and execution on the processing element in the active memory device, wherein the executable module code determines a processor type for execution based on successfully acquiring access to the processing element in the active memory device.

18. The method of claim 17, wherein identifying, by the compiler, the first code section that is executable by the main processor and the processing element in the active memory device comprises identifying a first code section that is executable by the main processor and a first processing element in a first active memory device and a second processing element in a second active memory device.

19. The method of claim 18, wherein transforming, by the compiler, the first code section to executable module code for execution on the main processor and execution on the processing element in the active memory device comprises transforming the first code section to executable module code for execution on the main processor and execution by the first processing element, wherein the executable module code includes copying a portion of the executable module code from the first active memory device to the second active memory device.

20. The method of claim 17, wherein transforming, by the compiler, the first code section to executable module code for execution on the main processor and execution on the processing element in the active memory device comprises generating device acquisition executable module code configured to acquire access to the processing element in the active memory device prior to execution of the executable module code on the processing element in the active memory device.

21. The method of claim 20, wherein transforming, by the compiler, the first code section to executable module code for execution on the main processor and execution on the processing element in the active memory device comprises generating device release executable module code configured to release the processing element in the active memory device following execution of the first code section by the processing element in the active memory device.

22. The method of claim 17, wherein transforming, by the compiler, the first code section to executable module code for execution on the main processor and execution on the processing element in the active memory device comprises transforming executable module code for execution by a first processing element in a first active memory device, the executable module code comprising:

copying the first code section to memory in the first active memory device; and

copying the first code section from the memory in the first active memory device to an instruction buffer in the first processing element.

23. The method of claim 22, wherein the executable module code further comprises copying the first code section from the memory in the first active memory device to a second active memory device

24. The method of claim 23, wherein copying the first code section from the memory in the first active memory device to the second active memory device comprises copying the first code section from the memory in the first active memory device to memory in the second active memory device.

25. The method of claim 24, wherein the executable module code further comprises copying the first code section from the memory in the second active memory device to a second instruction buffer in a second processing element in the second active memory device.

26. The method of claim 24, wherein the executable module code further comprises executing the first code section in the first processing element and executing the first code section in the second processing element.

27. The method of claim 22, wherein the executable module code further comprises:

copying a second code section to memory in the first active memory device, the second code section being part of the executable module code;

copying the second code section from the memory in the first active memory device to the instruction buffer in the first processing element; and

copying the second code section from the memory in the first active memory device to a third active memory device, wherein the computer system further includes the third active memory device.

28. The method of claim 27, wherein the executable module code further comprises executing the second code section in the first processing element and executing the second code section in a third processing element in the third active memory device.