negative Ping times & losing Performance data

Did you ever see something like this?

21.05 ping time

The problem also appears to loose performance graph data like this:

21.05 perf

But what’s causing this phenomen? I found this Article in MS KB895980:

CAUSE:

This problem occurs when the computer has the AMD Cool’n’Quiet technology (AMD dual cores) enabled in the BIOS or some Intel multi core processors. Multi core or multiprocessor systems may encounter Time Stamp Counter (TSC) drift when the time between different cores is not synchronized. The operating systems which use TSC as a timekeeping resource may experience the issue. Newer operating systems typically do not use the TSC by default if other timers are available in the system which can be used as a timekeeping source. Other available timers include the PM_Timer and the High Precision Event Timer (HPET).

Weird, isn’t it? I decided to use the boot.ini Switch “/userpmtimer” to successfully solve that problem.

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