The power of emacs! (ie: auto intentation)
My RDTSC routines, because....

they are better! of course! btw: asm volatile vs __asm__ __volatile__ what's the difference?
Cosmetic. Make counters 64 bit.
Put the testing code in a single place.
Introduce further absctaction
And even more abstraction - put tests in the loop
cosmetic
Let the power of statistics be with us!