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.
In x86 based systems, an IPI synchronizes the cache and Memory Management Unit (MMU) between processors.
See also
- Advanced Programmable Interrupt Controller
- Interrupt
- Interrupt Handler
- Non-Maskable Interrupt
- Programmable Interrupt Controller
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