This is part of an assignment for my Operating Systems course and I need help. H

ID: 639391 • Letter: T

Question

This is part of an assignment for my Operating Systems course and I need help. Here's how it works:

Assume that at time 5 no system resources are being used except for the processor and memory. Now consider the following events:

- At time 5: P1 executes a command to read from the disk unti 3.

- At time 15: P5's time slice expires.

- At time 18: P7 executes a command to write to disk unit 3.

- At time 20: P3 executes a command to read from disk unit 2.

- At time 24: P5 executes a command to write to disk unit 3.

- At time 28: P5 is swapped out.

- At time 33: An interrupt occurs from disk unit 2: P3's read is complete.

- At time 36: An interrupt occurs from disk unit 3: P1's read is complete.

- At time 38: P8 terminates.

- At time 40: An interrupt occurs from disk unit 3: P5's write is complete.

- At time 44: P5 is swapped back in.

- At time 48: An interrupt occurs from disk unit 3: P7's write is complete.

For each time 22, 37, and 47, identify which state each process is in. If a process is blocked, further identify the event on which it is blocked.

At time 22:

P1: blocked for I/O

P3: blocked for I/O

P5: ready/running

P7: blocked for I/O

P8: ready/running

At time 37

P1: ready/running

P3: ready/running

P5: blocked suspend

P7: blocked for I/O

P8: ready/running

At time 47

P1: ready/running

P3: ready/running

P5: ready suspend

P7: blocked for I/O

P8: exit

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