Inter-processor interrupt: Difference between revisions

Revision as of 07:07, 8 July 2025

Latest revision as of 20:56, 9 August 2025

(2 intermediate revisions by 2 users not shown)

Line 4:

In [[computing]], an '''inter-processor interrupt''' ('''IPI'''), also known as a ''shoulder tap'', is a special type of [[interrupt]] by which one [[Processor (computing)|processor]] may interrupt another processor in a [[multiprocessor]] system if the interrupting processor requires action from the other processor. Actions that might be requested include:

* Flushes ofFlush [[memory management unit]] caches, such as [[translation lookaside buffer]]s, on other processors when memory mappings are changed by one processor;

* StoppingStop when the system is being shut down by one processor.

* Notify an alternate CPU of a malfunction for Alternate CPU Recovery (ACR).

* Notify a processor that higher-priority work is available.

* Notify a processor of work that cannot be done on all processors due to, e.g.,

Line 36 ⟶ 37:

|author = Matt

|title = Understanding IRQL

|url = httphttps://ext2fsd.sourceforge.net/documents/irql.htm

|accessdate = 2014-12-06

|date = 2002-04-28