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PERF_PRECISION_100NS_TIMER

Updated: September 12, 2007

Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2

 

Description

This counter type shows a value that consists of two counter values: the count of the elapsed time of the event being monitored, and the "clock" time from a private timer in the same units. It measures time in 100 nanosecond units. This counter type differs from other counter timers in that the clock tick value accompanies the counter value eliminating any possible difference due to latency from the function call. Precision counter types are used when standard system timers are not precise enough for accurate readings.

Generic type

Percentage.

Formula

N1 - N0 / D1 - D0, where the numerator (N) represents the counter value, and the denominator (D) is the value of the private timer. The private timer has the same frequency as the 100 nanosecond timer.

Average

N1 - N0 / D1 - D0

Example

PhysicalDisk\% Disk Time

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