INTERVIEW QUESTIONS COMPUTER HARDWARE EMBEDDED SYSTEMS DETAILS

Question: What is interrupt latency? How can you recduce it?

Answer:

Source: CoolInterview.com

the time taken for the interrupt to active, at wat time it will relief from the interrupt Source: CoolInterview.com

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. Source: CoolInterview.com

Interrupt latency is the responce time of interrupt that meeans the time taken by the device to recieve it and then acknowledge after that it will transfer to particular ISR. Source: CoolInterview.com

when an interrupt fires, the microprocessor
executes an interrupt service
routine (ISR) that has been installed to
service the interrupt. The amount of time
that elapses between a device interrupt
request and the first instruction of the corresponding
ISR is known as interrupt
latency. Source: CoolInterview.com

it is the time between the firing of the interrupt to the attending of the interrupt.

the lesser the delay the faster the system. Source: CoolInterview.com

It is the time between the firing of the interrupt to the attending of the interrupt.

the lesser the delay the faster the system.

Source: CoolInterview.com

The time taken by a system to respond to an interrupt is known as interrupt latency.
There are so many reasons for interrupt latency. Few of them are
1. The time taken by the system to do necessary book keeping when interrupt occurred.
2. Time taken by the system to complete a lengthy ISR.
3. The time for which an interrupt is delayed.

So interrupt latency van be minimized by writing a short routine and by not delaying interrupts for more time
Source: CoolInterview.com

Everybody explained what is interrupt latency, but none discussed anything about how to reduce it... Source: CoolInterview.com

Time interval between interrupt service and interrupt request.
We can reduce it by writing smaller ISR routines Source: CoolInterview.com

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