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White Paper: Reducing Interrupt Latency in Embedded Systems through Message Signaled Interrupts

Embedded systems have traditionally been much more sensitive to both the interrupt latency and Central Processing Unit (CPU) overhead involved in servicing interrupts as compared to conventional Personal Computers (PC). Message Signaled Interrupts (MSI) represent the third generation of interrupt delivery methods for IO (Input/Output) devices, providing many benefits, including a significant reduction in interrupt latency.

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