System and method for increasing performance in multi-CPU simulation
View Patent ↗A system and method for increasing performance in a simulator environment operable to simulate a multiprocessor platform with program code running thereon. A set of processors are initialized upon instantiating the simulator environment on a host machine for executing the program code instructions. Code execution on a simulated processor is suspended by executing a simulator API routine which is called when the program code is to enter an idle state. The host resources that would otherwise have been spent on the processor running the idle loops are therefore conserved for use by the remaining processors.
1. A method of improving performance in a simulator environment operable to simulate a multiprocessor platform with a program running thereon, comprising:
initializing a list of simulated processors in said simulator environment for executing said program, said simulator environment being effectuated on a host machine having finite computing resources; and
suspending execution of said program on a particular simulated processor when said program is to enter an idle state on said particular simulated processor, said operation of suspending being effectuated via a simulator application program interface (API), whereby said host machine's computing resources are conserved.
2. The method of improving performance in a simulator environment as set forth in claim 1 , wherein said simulator API comprises a routine that is executed on said particular simulated processor.
3. The method of improving performance in a simulator environment as set forth in claim 1 , wherein said simulator API comprises a routine that is executed on another simulated processor.
4. The method of improving performance in a simulator environment as set forth in claim 1 , wherein said list of simulated processors is modified to indicate that said particular simulated processor is suspended.
5. The method of improving performance in a simulator environment as set forth in claim 4 , wherein said list of processors includes an indication that said particular simulated processor is operable to be re-activated responsive to an external event.
6. The method of improving performance in a simulator environment as set forth in claim 5 , wherein said external event comprises an interrupt.
7. The method of improving performance in a simulator environment as set forth in claim 4 , further comprising the step of re-activating said particular simulated processor.
8. The method of improving performance in a simulator environment as set forth in claim 1 , wherein said host machine includes at least one host processor and said simulator environment comprises a single-threaded simulator environment.
9. The method of improving performance in a simulator environment as set forth in claim 1 , further comprising the step of continuing to execute said program on remaining simulated processors in said simulator environment.
10. A system for improving performance in a host machine operable to simulate a multiprocessor platform with a program running thereon, comprising:
means to initialize a list of simulated processors in a simulator environment for executing said program, said simulator environment being effectuated on said host machine having finite computing resources; and
means for suspending execution of said program on a particular simulated processor when said program is to enter an idle state on said particular simulated processor, wherein said means for suspending includes a simulator application program interface (API) routine, whereby said host machine's computing resources are conserved.
11. The system for improving performance in a host machine as set forth in claim 10 , wherein said simulator API routine is operable to be executed on said particular simulated processor.
12. The system for improving performance in a host machine as set forth in claim 10 , wherein said simulator API routine is operable to be executed on another simulated processor.
13. The system for improving performance in a host machine as set forth in claim 10 , further including means to indicate that said particular simulated processor is suspended.
14. The system for improving performance in a host machine as set forth in claim 13 , further including means to indicate that said particular simulated processor is operable to be reactivated responsive to an external event.
15. The system for improving performance in a host machine as set forth in claim 14 , wherein said external event comprises an interrupt.
16. The system for improving performance in a host machine as set forth in claim 10 , further including means for re-activating said particular simulated processor.
17. The system for improving performance in a host machine as set forth in claim 10 , wherein said host machine includes at least one host processor and said simulator environment comprises a single-threaded simulator environment.
18. The system for improving performance in a host machine as set forth in claim 10 , further including means for continuing to execute said program on remaining simulated processors in said simulator environment.
19. A resource distribution method operable in a host machine having finite computing resources, said host machine for simulating a multiprocessor platform with a program running thereon, said method comprising:
initializing a list of simulated processors for executing said program;
commencing execution of said program on said simulated processors, wherein each of said simulated processors consumes a portion of said host machine's computing resources pursuant to executing said program; and
suspending execution of said program on a particular simulated processor when said program is to enter an idle state on said particular simulated processor, said operation of suspending being effectuated via a simulator application program interface (API), thereby releasing for distribution said host machine's computing resources otherwise consumed by said particular simulated processor.
20. The resource distribution method as set forth in claim 19 , wherein said simulator API comprises a routine that is executed on said particular simulated processor.
21. The resource distribution method as set forth in claim 19 , wherein said simulator API comprises a routine that is executed on another simulated processor.
22. The resource distribution method as set forth in claim 19 , wherein said list of simulated processors is modified to indicate that said particular simulated processor is suspended.
23. The resource distribution method as set forth in claim 22 , wherein said list of processors includes an indication that said particular simulated processor is operable to be re-activated responsive to an external event.
24. The resource distribution method as set forth in claim 23 , wherein said external event comprises an interrupt.