1. Given that main memory is composed of only three page frames for public use and that a seven-page program (with pages a, b, c, d, e, f, g) that requests pages in the following order: a, c, a, b, a, d, a, c, b, d, e, f
a. Using the FIFO page removal algorithm, indicate the movement of the pages into and out of the available page frames (called a page trace analysis) indicating each page fault with an asterisk (*). Then compute the failure and success ratios.
b. Increase the size of memory so it contains four page frames for public use. Using the same page requests as above and FIFO, do another page trace analysis and compute the failure and success ratios.
c. What general statement can you make from this example? Explain your answer.
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1. Given that main memory is composed of only three page frames for public use and...
Given that main memory is composed of three page frames for public use and that a program requests pages in the following order: A, B, C, D, A, B, E, A, B, C, D, E, B, A, B Using the FIFO page removal algorithm, perform a page trace analysis indicating page faults with asterisks (*). Then compute the failure and success ratios Using the LRU page removal algorithm, perform a page trace analysis and compute the failure and success ratios....
Given that main memory is composed of four page frames for public use and that program requests pages in the following order: a, b, a, b, f, d, f ,c, g, f, a, b, d, e, k, m Using FIFO removal algorithm, perform a page trace analysis and indicate page faults with asterix(*). Then calculate failure rate. Using LRU removal algorithm, perform a page trace analysis and indicate page faults with asterix(*). Then calculate failure rate.
Given that main memory is composed of four page frames for public use, use the following table to answer all parts of this problem: Page Frame Time When Loaded Time When Last Referenced Referenced BIT Modified BIT 0 09 307 0 0 1 17 362 1 0 2 10 294 0 1 3 160 369 1 1 The contents of which page frame would be swapped out by FIFO? The contents of which page frame would be swapped out by...
Which of the following about virtual memory is not true? A) Virtual memory needs paging hardware B)Virtual Memory uses storage device to extend the physical main memory C)The optimal replacement strategy is the most practical strategy D)Multiple process can share pages What should we do when having a page fault (Multiple answers)? A)Skip the machine instruction causing the page fault. B)Update the page table after loading the missing page C) Switch to a process that does not have page faults...
Implement the frame replacement algorithm for virtual memory Assume a computer system have 10 memory frames available inside the physical memory and is required to execute a process containing 20 pages. Assume a process P has been executed in the system and produced a sequence of 40 page demands as follows: Page demands trace of process P Demand 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 cont. Page...
3. Assume a virtual memory system with the following properties: • The physical memory available to an application consists of four-page frames, with frame numbers 0, 1, 2, and 3. The application has six pages of data in its virtual address space, using page numbers 0, 1, 2, 3, 4, and 5. Build a table showing which frame is used to bring in each page for the following sequences of page references using FIFO, MIN, and LRU as page replacement...
Consider the following page reference string: A C B D B A E F B F A G E F A Assuming demand paging with four frames, how many page faults would occur for the following replacement algorithms? Remember that all frames are initially empty, so your first unique pages will cost one fault each. Show all of your works. LRU replacement FIFO replacement Optimal (MIN) replacement
Exercise l: Suppose that we have a virtual memory space of 28 bytes for a given process and physical memory of 4 page frames. There is no cache. Suppose that pages are 32 bytes in length. 1) How many bits the virtual address contain? How many bits the physical address contain? bs Suppose now that some pages from the process have been brought into main memory as shown in the following figure: Virtual memory Physical memory Page table Frame #...
1. We have learnt that CPU can run a process only when it is in main memory and not secondary memory. I have 4 process in man memory referred to as 0,1,2,3,4,5. The CPU has to execute process 4 and 5 but these process are in the secondary memory and this can be possible using page replacement algorithm , In your own words what is ? a. page hit b. page miss C. page fault and d. What is the...
1) The following page table illustrates a system with 12-bit virtual and physical addresses and 256-byte pages. Free page frames are to be allocated in the order9 F, D. A dash for a page frame indicates that the page is not in memory. (4 points) Page Page-Frame 0x4 OxB 0 2 4 0x2 0x0 0xC 7 Convert the following virtual addresses to their equivalent physical addresses irn hexadecimal. All numbers are given in hexadecimal. In the case of a page...