How can I measure time less than 1 millisecond?

[RiceW]

I need to time an event that usually takes less than one millisecond. Is there a way to do so?

 

[strongm]

Yep. Investigate the QueryPerformanceCounter and QueryPerformanceFrequency API calls. But bear in mind that Windows is not a real time operating system, so your timing is never going to be completely accurate.

 

[chiph]

It's not likely that you can do this without additional hardware. The standard PC clock is only accurate to 7ms, IIRC.

Chip H.

 

[strongm]

The performance counters don't use the PC clock.