Timers, Timer Resolution, and Development of Efficient Code

Updated: June 16, 2010

File name: Timer-Resolution.docx
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This paper provides information about high-resolution timers and periodic timers for Windows operating systems. It provides guidelines for developers to use timers efficiently with platform power management. It assumes that the reader is familiar with concepts of periodic activity and scheduled timers.

This information applies to the following operating systems:
Windows Server 2008 R2
Windows 7

Included in this white paper:

• Timer Resolution

• Timer Coalescing

• System Timer Resolution Manipulation

• Recommendations for Application Developers

• Timer Coalescing Fundamentals

• Kernel-Mode Timer Coalescing Function

• Timer Coalescing within a WDF Driver

• User-Mode Timer Coalescing Function

• Best Practices for Using Timer Coalescing