Intrinsic functions _rdtsc and _rdtscp - Intel Community
https://community.intel.com/t5/Intel-ISA-Extensions/Intrinsic-functions-rdtsc-and-rdtscp/m-p/1170414
Aug 13, 2018 · These values increase if the core frequency is lower (e.g., the minimum delta is 14 cycles at 3.5 GHz, and almost 50 cycles at 1.0 GHz), suggesting that the operation takes 20-24 core clocks. RDTSCP shows a minimum increment of 18 (TSC) cycles between consecutive calls on the same system (also at 3.7 GHz).
DA: 52 PA: 18 MOZ Rank: 2