Introduction to Operating Systems | IIT Madras - #16 Interrupt Handling | Introduction to Operating Systems

Welcome to 'Introduction to Operating Systems' course ! This lecture provides a comprehensive overview of the interrupt handling process in operating systems. It details the steps involved in handling an interrupt, from the device asserting an interrupt line to the execution of the interrupt service routine (ISR) and the return to the previous context. The lecture emphasizes the roles of both the CPU and the operating system in the interrupt handling process. It explains the saving and restoration of the program state, including the use of the trapframe. The lecture also discusses the concept of interrupt latency and the factors affecting it, including the time taken for context switching and interrupt processing. Finally, it introduces techniques for reducing interrupt latency, such as using nested interrupts and splitting the interrupt handler into top-half and bottom-half components. NPTEL Courses permit certifications that can be used for Course Credits in Indian Universities as per the UGC and AICTE notifications. To understand various certification options for this course, please visit https://nptel.ac.in/courses/106106144 #InterruptHandling #ISR #InterruptLatency #NestedInterrupts #TopHalfBottomHalf