Method and system for simulating a multi-CPU/multi-core CPU/multi-threaded CPU hardware platform

• US 20070204271A1
• Filed: 02/28/2006
• Published: 08/30/2007
• Est. Priority Date: 02/28/2006
• Status: Abandoned Application

• Current Assignee: Wind River Systems Incorporated (Aptiv PLC)
• Original Assignee: Wind River Systems Incorporated (Aptiv PLC)
• Inventors: Koning, Maarten, Gaiarsa, Andrew
• Application Number:
  US11/365,632
• Publication Number:
  US 20070204271A1
• Time in Patent Office: Days
• US Class Current: 718/107
• CPC Class Codes: G06F 9/45537 Provision of facilities of other operating environments, e.g. WINE I/O emulation G06F13/105
• CPC Class Codes: G06F 9/544 Buffers; Shared memory; Pipes

Abstract

Described is a system and method for loading a target operating system into a host operating system, wherein the host processing space includes a memory pool, mapping the memory pool into a plurality of processes, scheduling tasks within one of the processes to create a multitasking environment, forking the plurality of processes, sharing the mapped memory pool and the loaded target operating system with the forked plurality of processes, thereby providing the plurality of processes with shared access to the memory pool and managing the scheduled tasks within the multitasking environment.

Claims

1. A method, comprising:

loading a target operating system into a host operating system, wherein the host processing space includes a memory pool;

mapping the memory pool into a plurality of processes;

scheduling tasks within one of the processes to create a multitasking environment;

forking the plurality of processes;

sharing the mapped memory pool and the loaded target operating system with the forked plurality of processes, thereby providing the plurality of processes with shared access to the memory pool; and

managing the scheduled tasks within the multitasking environment.

2. The method of claim 1, wherein the managing step further comprises the sub-step of:

implementing at least one symmetric multiprocessing mechanism within the target operating system.

3. The method of claim 1, further comprising:

implementing a board support mechanism within the target operating system, wherein the board support mechanism identifies an instance of one of the processes.

4. The method of claim 1, further comprising:

implementing an inter-processor interrupt mechanism within the host operating system, wherein the inter-processor interrupt mechanism issues a signal to interrupt an execution of one of the processes.

5. The method of claim 1, wherein the host operating system is a multi-CPU hardware platform that comprises a plurality of CPU processors.

6. The method of claim 1, wherein the host operating system is a multi-core CPU hardware platform that comprises a processor having a plurality of processor cores.

7. The method of claim 1, wherein the host operating system is a multi-threaded CPU hardware platform that comprises a processor having a plurality of virtual processing elements.

8. The method of claim 1, wherein the target operating system is an object module for scaleable processor architecture.

9. The method of claim 1, wherein the target operating system is a fully linked object module in ELF format comprising an ELF header.

10. The method of claim 9, further comprising:

transferring an execution of the forked plurality of processes to an entry point of the object module in accordance with the ELF header.

11. A system, comprising:

a loading element loading a target operating system into a host operating system, wherein the host processing space includes a memory pool;

a mapping element mapping the memory pool into a plurality of processes;

a scheduling element scheduling tasks within one of the processes to create a multitasking environment;

a forking element forking the plurality of processes;

a sharing element sharing the mapped memory pool and the loaded target operating system with the forked plurality of processes, thereby providing the plurality of processes with shared access to the memory pool; and

a managing element managing the scheduled tasks within the multitasking environment.

12. The system of claim 11, wherein the managing element further comprise:

at least one symmetric multiprocessing mechanism within the target operating system.

13. The system of claim 11, further comprising:

a board support mechanism within the target operating system, wherein the board support mechanism identifies an instance of one of the processes.

14. The system of claim 11, further comprising:

an inter-processor interrupt mechanism within the host operating system, wherein the inter-processor interrupt mechanism issues a signal to interrupt an execution of one of the processes.

15. The system of claim 11, wherein the host operating system is a multi-CPU hardware platform that comprises a plurality of CPU processors.

16. The system of claim 11, wherein the host operating system is a multi-core CPU hardware platform that comprises a processor having a plurality of processor cores.

17. The system of claim 11, wherein the host operating system is a multi-threaded CPU hardware platform that comprises a processor having a plurality of virtual processing elements.

18. The system of claim 11, wherein the target operating system is an object module for scaleable processor architecture.

19. The system of claim 11, wherein the target operating system is a fully linked object module in ELF format comprising an ELF header.

20. The system of claim 19, further comprising:

a transferring element transferring an execution of the forked plurality of processes to an entry point of the object module in accordance with the ELF header.

21. A computer readable storage medium including a set of instructions executable by a processor, the set of instructions operable to:

load a target operating system into a host operating system, wherein the host processing space includes a memory pool;

map the memory pool into a plurality of processes;

schedule tasks within one of the processes to create a multitasking environment;

fork the plurality of processes;

share the mapped memory pool and the loaded target operating system with the forked plurality of processes, thereby providing the plurality of processes with shared access to the memory pool; and

manage the scheduled tasks within the multitasking environment.