still possible to use rdtsc - you need to make sure that the thread has switched from executing on one CPU to another one, different packages have different co

still possible to use rdtsc - you need to make sure that the thread has switched from executing on one CPU to another one, different packages have different counters. (can do it by setting thread affinity) - you need to see if CPU supports invariant TSC (cpuid reports TscInvariant = True )