Data placement for execution of an executable

• US 8,914,779 B2
• Filed: 11/26/2012
• Issued: 12/16/2014
• Est. Priority Date: 11/05/2012
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Chen, Tong, O'Brien, John K., Sura, Zehra
• Primary Examiner(s): Zhen, Wei
• Assistant Examiner(s): Chen, Zhan
• Application Number:
  US13/684,668
• Publication Number:
  US 20140130027A1
• Time in Patent Office: 750 Days
• Field of Search: 717100-178
• US Class Current: 717/140
• CPC Class Codes: G06F 8/41 Compilation

Abstract

According to one embodiment, a system including a compiler to produce an executable module to be executed by a computer system including a main processor and active memory devices is provided. The system configured to perform a method including dividing source code into code sections, identifying a first code section to be executed by the active memory devices and identifying data structures that are used by the first code section. The method also includes classifying the data structures based on pre-defined attributes, formulating, by the compiler, a storage mapping plan for the data structures based on the classifying and generating, by the compiler, mapping code that implements the storage mapping plan, wherein the mapping code is part of the executable module and wherein the mapping code maps storing of the data structures to storage locations in the active memory devices.

Claims

1. A system comprising a compiler to produce an executable module to be executed by a computer system including a main processor and active memory devices, the system configured to perform a method comprising:

dividing source code into code sections;

identifying a first code section to be executed by the active memory devices, wherein the first code section is one of the code sections;

identifying data structures that are used by the first code section;

classifying the data structures based on pre-defined attributes;

formulating, by the compiler, a storage mapping plan for the data structures based on the classifying, the storage mapping plan for the data structures being related to a first active memory device and a second active memory device; and

generating, by the compiler, mapping code that implements the storage mapping plan, wherein the mapping code is part of the executable module and wherein the mapping code maps storing of the data structures to storage locations in the active memory devices;

wherein generating, by the compiler, mapping code that implements the storage mapping plan comprises generating mapping code that maps a first data structure to a first active memory device at a first time during runtime, the data structures including the first data structure and the active memory devices including the first active memory device;

wherein the first active memory device is hardware comprising a first memory vault and a first processing element;

wherein the second active memory device is hardware comprising a second memory vault and a second processing element.

2. The system of claim 1, wherein classifying the data structures based on pre-defined attributes comprises classifying the data structures based on the data structures being read and write data, the data structures being read only, number of accesses to the data structures, type of accesses to the data structures, size of the data structures and allocation time for the data structures.

3. The system of claim 2, wherein allocation time for the data structures comprises a time at which the data structures are loaded for use by the executable.

4. The system of claim 1, wherein generating, by the compiler, mapping code that implements the storage mapping plan comprises generating mapping code that is executed during runtime by making calls to an operating system that map virtual addresses to physical addresses for the data structures.

5. The system of claim 1, wherein generating, by the compiler, mapping code that implements the storage mapping plan comprises generating mapping code that maps a second data structure to the second active memory device at a second time during runtime, the second time being after the first time, the data structures including the second data structure and the active memory devices including the second active memory device.

6. The system of claim 1, wherein the first time comprises a program load time and the first data structure comprises statically allocated data.

7. The system of claim 1, wherein the first time comprises a procedure entry time for a called subroutine executable by the first active memory device.

8. The system of claim 1, wherein the source code includes an explicit call to allocate memory for mapping a selected data structure to a selected active memory device at a selected time.

9. A system for distributing data in memory for execution of an executable module, the system comprising a main processor and active memory devices, the system configured to perform a method comprising:

receiving an executable generated by a compiler, wherein the executable comprises mapping code that implements mapping of data structures used by the executable to physical memory;

determining storage locations in the active memory devices for the data structures based on the mapping code, the mapping code for the data structures being related to a first active memory device and a second active memory device; and

executing the mapping code, by the main processor, to call a function in an operating system that maps the data structures to the storage locations, wherein the mapping code organizes mapping of the data structures based on pre-defined attributes;

wherein executing the mapping code comprises executing the mapping code that maps a first data structure to a corresponding first active memory device at a first time during runtime, the data structures including the first data structure and the active memory devices including the first active memory device;

wherein the first active memory device is hardware comprising a first memory vault and a first processing element;

wherein the second active memory device is hardware comprising a second memory vault and a second processing element.

10. The system of claim 9, wherein the pre-defined attributes comprise at least one selected from the group consisting of:

the data structures being read and write data, the data structures being read only, number of accesses to the data structures, type of accesses to the data structures, size of the data structures and allocation time for the data structures.

11. The system of claim 9, wherein executing the mapping code comprises executing the mapping code during runtime by making calls to the operating system that map virtual addresses to physical addresses for the data structures.

12. The system of claim 9, wherein executing the mapping code comprises executing the mapping code that maps a second data structure to a second active memory device at a second time during runtime, the second time being after the first time, the data structures including the second data structure and the active memory devices including the second active memory device.

13. The system of claim 9, wherein the first time comprises a program load time and the first data structure comprises statically allocated data or a procedure entry time for a called subroutine executable by the first active memory device.

14. The system of claim 9, wherein executing the mapping code comprises executing the mapping code that stores the data structures in physical memory of active memory devices that utilize the data structures during execution of the executable.

15. The system of claim 9, wherein receiving the executable comprises receiving an executable based on source code that includes an explicit call to allocate memory for mapping a selected data structure to a selected active memory device at a selected time.

16. The system of claim 9, wherein executing the mapping code comprises allocating memory space or creating copies of the data structures.