Microsoft KB Archive/101776

= How Windows NT Detects Idle Time =

Article ID: 101776

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Advanced Server 3.1
 * Microsoft Windows NT Workstation 3.1
 * Microsoft Windows NT Advanced Server 3.1
 * Microsoft Windows NT Server 4.0 Standard Edition
 * Microsoft Windows NT Workstation 4.0 Developer Edition

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This article was previously published under Q101776



Idle time is detected by computing the time spent in the idle thread. There is one idle thread per processor. The idle threads run when there are no executable threads. When a clock interrupt occurs, a clock tick is attributed to the active thread. When this occurs while the idle thread is active, the time is counted as idle time.

Additional query words: prodnt

Keywords: kbenv KB101776

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