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Explain what is interrupt latency? How can we reduce it?

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interrupt latency is the time required to return from the interrupt service routine after tackling a particular interrupt. We can reduce it by writing smaller ISR routines.

The Interrupt latency is the time taken to service an interrupt. It can be reduced by writing shorter handlers which has no or strictly reduced function calls

The time taken from actual hardware interrupt occurrence to ISR invoke.
The scheduling algorithm should be efficient to reduce this latency.

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