Interrupt Latency

“Latency is reported in two different ways: interrupt and scheduling…Interrupt latency is the measurement of system’s response-time to an interrupt…Scheduling latency is usually a measure of performance for the RTOS thread scheduler.” — Faheem Sheikh and Dan Driscoll

Today’s WhatIs.com Word of the Day is interrupt latency.  It’s a term you might have heard vendors quoting when they brag about “zero latency.” Zero latency is more accurately defined as the time added by a realt-time operating system (RTOS) to the regular processing of an interrupt.