Rdtsc serializing instruction

rdtscp vs rdtsc
cpu cycle counter
rdtsc to seconds
arm rdtsc
rdtsc(); // linux
intel always running timer
rdtsc instruction
read_tsc

RDTSC Doesn't Serialize The RDTSC instruction is not a serializing previous instructions have executed ( see “ CPUID is a Serializing Instruction " on The RDTSC instruction is not a serializing instruction. Thus, it does not necessarily wait until all previous instructions have been executed before reading The RDTSC instruction is not a serializing instruction. It does not necessarily wait until all previous instructions have been executed before reading the Why isn't RDTSC a serializing instruction? Solution: The time stamp counter was introduced on the Pentium microarchitecture. Out-of-order execution didn't show The load instruction is sandwiched between twordtscinstructions. In order to keep the rdtsc instruction from being performed out-of-order, a serializingWhy isn't RDTSC a serializing instruction? The Intel manuals for the RDTSC instruction warn that out of order execution can change when RDTSC is actually "The RDTSCP instruction is not a serializing instruction, but it does wait until all previous instructions have executed and all previous loads