Sub-millisecond precision timing in C or C++

Question

What techniques / methods exist for getting sub-millisecond precision timing data in C or C++, and what precision and accuracy do they provide? I\'m looking for methods tha

Answer 1

Good luck trying to do that with MS Windows. You need a realtime operating system, that is to say, one where timing is guaranteed repeatable. Windows can switch to another thread or even another process at an inopportune moment. You will also have no control over cache misses.

When I was doing realtime robotic control, I used a very lightweight OS called OnTime RTOS32, which has a partial Windows API emulation layer. I do not know if it would be suitable for what you are doing. However, with Windows, you will probably never be able to prove that it will never fail to give the timely response.