When would you prefer to use busy-wait I/O over interrupt-driven I/O?
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When would you prefer to use busy-wait I/O over interrupt-driven I/O?
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Busywait IO while generally less efficient has some advantages in specific scenarios where interruptdriven IO might be overkill or introduce unwanted complexity Here are some cases where you might prefer busywait Simple and Short Operations If the IO operation is very quick and infrequent the overhead of setting up and handling interrupts might outweigh the benefit of freeing up the CPU Busywaiting can be simpler to implement in such cases Highly Deterministic Timing In very specific situations where precise timing is crucial busywaiting can offer more control over the exact moment the data transfer occurs Interrupt latency can introduce slight variations which might be undesirable in these scenarios Realtime Systems In some realtime systems with very tight deadlines avoiding the interrupt ...View the full answer
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Computers As Components Principles Of Embedded Computing System Design
ISBN: 9780128053874
4th Edition
Authors: Marilyn Wolf
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