Inter-processor interrupt: Difference between revisions

Revision as of 00:09, 24 December 2010

Revision as of 15:29, 16 February 2011

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An '''inter-processor interrupt''' ('''IPI''') is a special type of [[interrupt]] by which one processor may interrupt another processor in a [[multiprocessor]] system. IPIs are typically used to implement a [[cache coherency]] [[synchronization]] point.

== Examples ==

=== Windows ===

In a Windows based multiprocessor system, a processor may interrupt another processor for the following reasons:

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5. Kernel debugger breakpoint.

InIPIs Windows,are thisgiven hasan [[IRQL (Windows)]] as 29.

== Other uses ==

In [[x86 architecture|x86]] based systems, an IPI synchronizes the cache and [[memory management unit]] (MMU) between processors.