Consider the LRU explain by solving with each step 7,0,1.8.0,3,2,1,6,5,0,3
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- Subject code rcs509 Consider a system having 64 frames and there are four processes with the following virtual memory sizes: v(1) = 16, v(2) = 128, v(3) = 64 and v(4) = 48. Find the frame allocation using equal and proportional allocations.please no chatgpt answer . Consider a demand-paging system with a paging disk that has an average access and transfer time of 20 milliseconds. Addresses are translated through a page table in main memory, with an access time of 1 microsecond per memory access. Thus, each memory reference through the page table takes two accesses. To improve this time, we have added an associative memory that reduces access time to one memory reference, if the page-table entry is in the associative memory. Assume that 80 percent of the accesses are in the associative memory and that, of those remaining, 10 percent (or 2 percent of the total) cause page faults. What is the effective memory access time? Consider the following page reference string: 1, 2, 3, 4, 2, 1, 5, 6, 2, 1, 2, 3, 7, 6, 3, 2, 1, 2, 3, 6. Assuming demand paging with four frames, Show which pages are resident under the LRU, FIFO, and Optimal replacement algorithms by filling out the following tables. How many page faults would occur…A virtual memory system has an address space of 8K words, a memory space of 4K words, and page and block sizes of 1K words. The following page reference changes occur during a given time interval: 4201204126735 Determine the four pages that are resident in main memory after each page reference change if the replacement algorithm used is (a) FIFO; (b) LRU Explain in detail.
- Consider the following set of processes A, B, C, D with the following CPU burst time and I/O. Find the average waiting time with RR of quantum 10ms and context switch time=2ms. What is the average waiting time? Write the waiting time for processes A,B,C,D.Let's pretend for a moment that we have a byte-addressable computer with fully associative mapping, 16-bit main memory addresses, and 32 blocks of cache memory. The following holds true if each block is 16 bits in size:a) Determine how many bytes the offset field is.Measure the tag field's width and height in pixels (b).Thefollowing page addresses, in the given sequence,were generated by a program: 1 8 3 4 8 1 5 6 8 1 8 3 7 6 3 8 1 8 3 6 Calculate the page faults using below page replacementalgorithms for memory with3 and 5 framesseparately. Assume that the main memory is empty initially. (a) LRU (b) FIFO (c) Optimal Page Replacement (d) Which is the most efficient among them and why?
- Consider the following set of four processes. Their arrival time and time to require completing the execution are given in the following table. Consider all times in milliseconds. Implement the SJF algorithm on given chart. Process Arrival Time (T0) Time required for completion (CPU Burst Time) P0 0 10 P1 1 6 P2 3 2 P3 5 4Assume a process containing 5 pages with 1024 bytes per page and physical memory with 10 page frames. Frames and pages are of the same size. Given the following page map table (PMT): a) determine the physical address associated with the logical address of page 1, offset 100? b) what is the logical address associated with the physical address 2300? Please dont over complicate this question!!Assuming a Round-Robin Scheduling works with a quantum time of 5, draw the timeline for CPU- and I/Obursts for the following three processes; A, B, C, with their arrival times, execution and I/O times. k=5 m=10 p=3
- For an old computing system with 2K bytes physical memory, and the virtual address has 13bits. Suppose that the size of page/frame is 256 bytes. For a process A, it has its codes and data inpage 0, 1, 2, 10, 11, 28, 29, where pages 0, 1, 10, 29 are in frame 1, 3, 4 and 6, respectively.Moreover, frame 0 contains kernel OS code/data and all other frames are free.a. Show the page table and the content of each PTE for process A;b. Use a figure to illustrate the address translation for virtual address 1110000100000 and explainwhat happens during the translation (interaction among page table, physical memory, disk, andoperating system);c. Suppose that there is a TLB with 4 entries and the current content has the mapping informationfor pages 0, 1. Draw a new figure to illustrate the translation of address 101000011000 andexplain what happens during the translation process.Consider a process that references its six pages in the order 6,1,2,3,1,2,4,5,1,3. How many page faults will occur if the process has been allocated just three frames in real memory, all the frames are initially empty, and the page-replacement algorithm is i. FIFO. ii. Optimal. iii. LRU (least recently used).b). Consider a system with 32 bits per disk address that has a totalof 1000,000 blocks, and 400,000 free blocks. How many bits would be needed tostore the free-space list using each of the following methods.(i). Bit map.(ii). Link list.