Abstract: Due to its moderate overhead and small quantization error, the time-stamping counter is currently the most precise time-measuring mechanism on Intel 80X86-based Platform. On the Pentium processors, we can simply use a conventional null benchmark to determine the time-stamping counter’s overhead accurately. Similarly, on the Pentium Pro processors, Intel also recommends the same method for measuring this overhead. However, since the influence of the measured operation is neglected, we find this method becomes inaccurate on Pentium Pro. Therefore, in this paper, we propose a new method for determining the overhead of Pentium Pro‘s time-stamping counter. Furthermore, we also provide some empirical results to confirm the feasibility of our idea
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