1.2. Assume a process that requires a series of file reads. We know that the computer system where this process runs also has other processes "running" in multiprogramming fashion, but not simultaneously. We also know that these many file reads do not bring apparent decrease in performance of the system even though I/O op- erations are very costly in terms of time. [5] (i) What mechanism in the computer system is responsible for enabling multiprogramming and allowing systems to avoid programmed I/O operations? (i) Explain the functionality and role of such mechanism. (iii) How does the mechanism work? Explain all its steps (make references to the course content/slides). (iv) We know that such mechanism is ultimately necessary in any modern computer system; it helps pro- cesses handling I/O operations. Let's assume that a system needs to handle three I/O operations almost si-

1.2. Assume a process that requires a series of file reads. We know that the computer system where this process runs also has other processes "running" in multiprogramming fashion, but not simultaneously. We also know that these many file reads do not bring apparent decrease in performance of the system even though I/O op- erations are very costly in terms of time. [5] (i) What mechanism in the computer system is responsible for enabling multiprogramming and allowing systems to avoid programmed I/O operations? (i) Explain the functionality and role of such mechanism. (iii) How does the mechanism work? Explain all its steps (make references to the course content/slides). (iv) We know that such mechanism is ultimately necessary in any modern computer system; it helps pro- cesses handling I/O operations. Let's assume that a system needs to handle three I/O operations almost si-

Operations Research : Applications and Algorithms

4th Edition

ISBN:9780534380588

Author:Wayne L. Winston

Publisher:Wayne L. Winston

Chapter20: Queuing Theory

Section20.10: Exponential Queues In Series And Open Queuing Networks

Problem 11P

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Modern Operating Systems must tackle the challenges of Synchronization and Deadlock. 'Process Synchronization' is the task of coordinating the execution of processes in a way that no two processes can have access to the same shared data or resource. A process requesting a resource may have to wait, if the resource is not available at that time. Sometimes, a waiting process is never able to change state, because the resources it has requested are held by other waiting processes; this situation is called 'Deadlock'. In concurrent programming, a "critical section" is a part of a multi-process program thatmay not be concurrently executed by more than one of the program's thread. Let us consider a 2 processes solution: do {flag[i] = TRUE;while(flag[j]); %waitCRITICAL SECTIONflag[i] = FALSE;REMAINDER SECTION} while (TRUE);Pseudo-code of $P_i$ (the one of $P_j$ is symmetric) a) Does the given solution satisfy the mutual exclusion requirement? Explain (asimple 'yes-no' answer is NOT enough.…
Modern Operating Systems must tackle the challenges of Synchronization and Deadlock. ’Process Synchronization’ is the task of coordinating the execution of processes in a way that no two processes can have access to the same shared data or resource. A process requesting a resource may have to wait, if the resource is not available at that time. Sometimes, a waiting process is never able to change state, because the resources it has requested are held by other waiting processes; this situation is called ’Deadlock'.
Modern Operating Systems must tackle the challenges of Synchronization and Deadlock. 'Pro- vess Synchronization' is the task of coordinating the execution of processes in a way that no two processes can have access to the same shared data or resource. A process requesting a resource may have to wait, if the resource is not available at that time. Sometimes, a waiting process is never able to change state, because the resources it has requested are held by other waiting processes; this situation is called 'Deadlock'. ,In concurrent programming, a "critical section" is a part of a multi-process program that (a) may not be concurrently executed by more than one of the program's thread. Let us consider a 2 processes solution: do { flag(i] - TRUE; while (flag[j]); %wait CRITICAL SECTION flag[i] - FALSE; REMAINDER SECTION } while (TRUE); Pseudo-code of $P_i$ (the one of $P_j$ is symmetric) (i) { simple 'yes-no' answer is NOT enough. What is the mutual exclusion requirement? Why is (not?)…
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Please help me with my review question on Operating Systems Subject. This is not a graded question, please also explain the reason why so that I could understand step by step.
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