Scheduling, Thread Context, and IRQL

Updated: January 26, 2004

File name: IRQL_thread.doc
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This paper presents information about how thread scheduling, thread context, and a processor's current interrupt request level (IRQL) affect the operation of kernel-mode drivers for the Microsoft Windows family of operating systems. It is intended to provide driver writers with a greater understanding of the environment in which their code runs.

Included in this white paper:

• Thread Scheduling

• Thread Context and Driver Routines

• Driver Threads

• Interrupt Request Levels

• Interrupting a Thread: Examples

• Testing for IRQL Problems

• Best Practices for Drivers

• Call to Action and Resources

See Also
What is IRQL?