Microsoft KB Archive/157044

= Some Applications Appear to Consume 100% of CPU Time =

Article ID: 157044

Article Last Modified on 11/1/2006

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APPLIES TO


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

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This article was previously published under Q157044



SUMMARY
Microsoft Windows NT allows users to monitor CPU usage through Task Manager and Performance Monitor. If these tools are used in Windows NT 4.0, some applications may appear to be consuming 100 percent of the CPU time, while Windows NT is waiting for other actions to occur.



MORE INFORMATION
Windows NT 4.0 allows an application to consume all of the CPU time if no other thread is waiting for CPU time. As soon as another thread requests CPU time, regardless of the priority of that thread, Windows NT 4.0 yields control and CPU time will drop back to normal levels.

The behavior described above is the result of a change made to the way in which Windows NT 4.0 manages CPU time. This behavior is by design and has no negative effect on Windows NT 4.0 or application performance.

Additional query words: prodnt perfmon nt16ap

Keywords: kbnetwork KB157044

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