After finishing all the requests (A) Draw the final tree representation of the system. (b) Find the total free space available in the system for allocation (c) Find the total internal fragmentation caused because of all the allocation
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- With virtual memory, when a program requests memory,the memory management system does which of the following? Select one: A. It grants the request as long as there is enough physical memory to accommodate B. It looks up the address in the page table. If the address is in memory, then it grants the request. C. It looks up the address in the page table. If the address is in memory, it grants the request. If the address is stored to disk, it writes a section of memory to disk and then transfers the requested virtual memory address from disk to main memory. D. It causes a deadlock to occur.Suppose we have a system with 50 active processes, P0, P1, ..., P49, some user processes, and some kernel processes. For simplicity, we are not concerned with threads in this question. Ready processes are scheduled to Run by some scheduler. The scheduling algorithm does not matter here. Suppose process P13 makes a disk_read() operating system call. Assume that completion of disk transfer is signaled by an interrupt from the disk controller. Trace as accurately as you can what happens in the CPU (not the disk) until process P13 has received its requested information from the disk. Hints: The question is about interrupt handlingI am looking for a trace of what processes run, why, and what they do.I am not looking for instruction-level explanations.I am not looking for a discussion of disk access, operation, or transfer.Suppose we have a system with 50 active processes, P0, P1, ..., P49, some user processes, and some kernel processes. For simplicity, we are not concerned with threads in this question. Ready processes are scheduled to Run by some scheduler. The scheduling algorithm does not matter here. Suppose process P13 makes a disk_read() operating system call. Assume that the completion of disk transfer is signalled by an interrupt from the disk controller. Trace as accurately as you can what happens in the CPU (not the disk) until process P13 has received its requested information from the disk. Hints: The question is about interrupt handling I am looking for a trace of what processes run, why, and what they do. I am not looking for instruction-level explanations. I am not looking for a discussion of disk access, operation, or transfer.
- In the context of memory management, describe in fully the differences between dynamic loading and static loading.Problem Statement: (The following problem is based on problem statements in a number of operating systems texts) For this lab, you'll be setting up 2 queues of PCBs. A process control block (PCB) is an internal structure that is used to hold information associated with a process. A process is an instance of a program that is brought into random-access memory (RAM) for execution. To simplify matters, you'll be setting up 2 queues: a ready queue and a wait queue and, PCBs each PCB will have 2 fields: a process ID or PID (a positive integer) a link field to point to the next PCB on a queue The ready queue will have the PCBs for the processes that will be run in a first-come, first-served fashion. The wait queue will have the PCBs for the processes that will be waiting for a resource in a first-come, first-served fashion. If the PCB at the head of the ready queue needs some resource (for example, I/O) then it will be removed from the ready queue and moved to the rear of…Problem Solving: Assume the following processes are waiting to be loaded in main memory. Process Size A 5 MB B 7 MB C 8 MB D 10 MB E 15 MB Which of the following processes are going to be served by the main memory with 45 MB total space in a fixed partition divided into 5 slots? Currently the first slot is occupied by the operating system. Illustrate the memory allocation. What is the total free space? What is the total internal fragmentation? Still using the given process, a computer system has a 64 MB main memory which is divided into 7 fixed unequal partitions such as 10MB, 20MB, 5MB, 5MB, 8MB, 10MB, and 6MB, respectively. First partition is for OS. Illustrate the memory allocation. What is the total free space? Is there external…
- A certain application runs in 10 minutes on a single PXY processor. When we run the same application on a 6-core PXY system, we observe that it runs in 2 minutes. Assume that some portion of this application’s execution is due to the inherently sequential code, and the remaining portion is fully parallelizable. How long would it take to run the same application on an 8-core PXY system? Give briefly the main lines of your reasoning and your derivation to get credit.Note: Write a bash script to simulate producer-consumer problem using semaphores. Producer-consumer problem is a common paradigm for cooperating processes. A producer process produces information that is consumed by a consumer process. One solution to the producer-consumer problem uses shared memory. To allow producer and consumer processes to run concurrently, there must be available a buffer of items that can be filled by the producer and emptied by the consumer. This buffer will reside in a region of memory that is shared by the producer and consumer processes. A producer can produce one item while the consumer is consuming another item. The producer and consumer must be synchronized, so that the consumer does not try to consume an item that has not yet been produced.