Re: [GD-Windows] More timer fun! (sorry for revisit!)

[Pierre T. <p.t...@wa...>]

> Thus, the best implementation of reading
> the time stamp counter is this:
>
> inline uint64 read_tsc()
> {
>   __asm {
>     rdtsc
>   }
> }

Actually the best implementation is to insert a cpuid instruction before
rdtsc, to prevent out-of-sequence execution from ruining the results.

For more details, please refer to Intel's application notes "Using the RDTSC
instruction for performance monitoring".

Pierre