Problem B . 1) List all the possible transactions between the five process state

Question

Problem B. 1) List all the possible transactions between the five process states in the diagram of process state, for each of which provide one example of the action/event/situation that may cause such transaction.

2)What state transitions can be possibly triggered by CPU (short-term) scheduler, long-term scheduler, and medium-term scheduler, respectively? (hint: describe it as org. state X à new state Y)

3)In which state(s), the PCB (process control block) of a process needs to be saved, loaded/reloaded, or destroyed, respectively, by the CP?

Diagram of Process State admitted interupt exi terminated new ready running scheduler dispatch IVO or event completion o or event wat waiting Operating System Concepts-10th Edition 2.7 Silberschatz, Galvin and Gagne G2018

Explanation / Answer

please do upvote.If you have any problem do comment and i will be happy to help you.Thanks for using chegg.

---------------------

1)

following are possible transactions with examples that can cause such transaction:

admitted - --->action of long term scheduler can cause it

scheduler dispatch----->e.g when a process is the most suitable process to be executed as determined by lot of factors like scheduling policy , cpu performance,available memory etc a scheduler dispatch occurs for that process

interrupt ----->e.g When a high priority process is availabe in ready queue,the current process in interrupted

I/O or event wait-----> for e.g waiting for input to be given by user

I/O or event completion-----> e.g the process have received its input from user

exit --------> e.g it occurs when process have completed execution

---------------------

2)

short term scheduler-----> There are lot of processes in ready queue.It chooses one of process and allocates cpu for it.Hence transition from ready-----> running an be triggered by it

long term scheduler-----> It chooses processes and puts them into ready queue .Hence transition from new----> running an be triggered by it

medium term scheduler-----> It tries to reduce burden on main storage by withdrawing processes from main storage and putting it in secondary storage.Hence transition from running-----> waiting an be triggered by it

-------------------------

3)

pcb(process control block)---->It contains various data about process which is essential for running the process.

pcb is saved----->when it transitions to waiting state

pcb is loaded/reload ----->when it transitions to running state

pcb is destroyed ----->when it transitions to terminated state

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.