ReAl (20.01.2008 20:25, просмотров: 209) ответил AlexandrY на Нормальный мануал на хоть какой-нибудь пень я даже не пытаюсь искать.
RDTSC—Read Time-Stamp Counter - есть у всех пней. Opcode 0F 31
Description
Loads the current value of the processor’s time-stamp counter into the EDX:EAX registers. The time-stamp counter is contained in a 64-bit MSR. The high-order 32 bits of the MSR are loaded into the EDX register, and the low-order 32 bits are loaded into the EAX register. The processor monotonically increments the time-stamp counter MSR every clock cycle and resets it to 0 whenever the processor is reset. See “Time Stamp Counter” in Chapter 15 of the IA-32 Intel Architecture Software Developer’s Manual, Volume 3 for specific details of the time stamp counter behavior.