Talk:Inter-processor interrupt

This article is rated Stub-class on Wikipedia's content assessment scale.
It is of interest to the following WikiProjects:

Computing

	This article is within the scope of WikiProject Computing, a collaborative effort to improve the coverage of computers, computing, and information technology on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.ComputingWikipedia:WikiProject ComputingTemplate:WikiProject ComputingComputing articles
???	This article has not yet received a rating on the project's importance scale.
	This article is supported by Computer hardware task force.
	This article has been automatically rated by a bot or other tool as Stub-class because it uses a stub template. Please ensure the assessment is correct before removing the `\|auto=` parameter.

IPI vs IPC[edit]

I'm not sure whether it's really "IPI" instead of "IPC", but it makes much more sense! There are also much better hits under Google for "IPI interrupt" than for "IPC" Interrupt. Additionally, "IPC" stands for Interprocess Communication, not for Interprocess Interrupt, as far as I know.

Yeah, IPC was a typo; I was also editing IPC articles at the time. Jsmethers 09:18, 10 January 2006 (UTC)[reply]

IRQL[edit]

In Windows, this has IRQL as 29.

What is this IRQL-number?

It doesn't seem to be the IRQ-number, because the highest IRQ is 15 (0xF), when APIC is not used. Also according to Interrupt request the IPI is on IRQ13. Also APIC can use up to 224 IRQs, but by default the maximum that is used is 24. --MrBurns (talk) 09:04, 26 October 2009 (UTC)[reply]

Cache coherency[edit]

Current version says: "In x86 based systems, an IPI synchronizes the cache and memory management unit (MMU) between processors." I agree that IPI may be used on some systems for cache coherency, but x86 has (at least for several years) hardware cache coherency protocol (which is software-invisible and doesn't use IPI) — Preceding unsigned comment added by 134.191.232.68 (talk) 12:19, 14 June 2011 (UTC)[reply]