Microsecond accurate (or better) process timing in Linux

Question

I need a very accurate way to time parts of my program. I could use the regular high-resolution clock for this, but that will return wallclock time, which is not what I need

Answer 1

See this question for some more info.

Something I've used for such things is gettimeofday(). It provides a structure with seconds and microseconds. Call it before the code, and again after. Then just subtract the two structs using timersub, and you can get the time it took in seconds from the tv_usec field.