Anybody knows, how to get real value of clock per sec? clock() from time.h returns clocks from start of my process, so it need to be divided by CLOCKS_PER_SEC, but this constant has always value 1000000.
Is there some POSIX standard for this?
That's how it specified in the C specification.
If you want to measure elapsed time, there are other (and better) functions, like gettimeofday for example.