Consider an 8-bit memory architecture that uses a single level page table with4-bit page numbers and implements demand paging and copy-on-write.Consider the following page table where the pages are numbered from thebottom up. I.e., the bottom entry corresponds to page 0.Valid Access Frame1RWOx3RWOx01RWOx1RWRWRWRWRWRWRW1RWOx71RWOx8RWOx2RXOx4RXOx9RXOx4In the worst case, how many pages will need to be copied as a result of thisprocess' execution?O All of them

Given Data : 8-bit memory architecture 4-bit page number. Page numbers are numbered from bottom to…

Answered: Consider an 8-bit memory architecture…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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A 4-processor systems implements cache coherence with a snoopy MSI protocol. For each access in the sequence below (to the same BLOCK address), list the coherence states (M/S/I) for each processor's cache after the access. Assume all the cache states begin in the Invalid (I) state. Event P1 state P2 state P3 state P4 state P1 reads P1 writes P2 reads P4 reads
What would be some advantages of having a larger page size of 16 KiB? What are some disadvantages?
Consider a system with 36-bit virtual addresses, 32-bit physical addresses, and 4KB pages. The Translation Look aside Buffer (TLB) system uses a page table to translate virtual addresses to physical addresses; each page table entry include dirty (D) and resident (R) bits. 8. Virtual Page Number (VPN) Valid Bit (V) Dirty Bit (D) PPN(Physical Page Number) Tag 00000A. in HEX 0000A a) Assuming a flat page table, what is the size of each page table entry, and how many entries does the page table have? b) If you changed the system to use 1KB pages instead of 4 KB pages, how would the number of entries in the page table change? Please give the ratio of the new size to the old size. c) For page size of 4KB, the contents of the page table and TLB are shown to the right. The page table uses an LRU replacement policy, and the LRU page (shown below) will be chosen for replacement. For each of these four accesses, compute its corresponding physical address and indicate whether the access causes a…
Suppose a computer system uses 16-bit addresses for both its virtual and physical addresses. In addition, assume each page (and frame) has size 256 bytes. How many bits are used for the page number? How many bits are used for the offset? 8 bits each. With this system, what’s the maximum number of pages that a process can have? 256 Suppose that each entry in the page table comprises 4 bytes (including the frame number, the valid bit, and miscellaneous “bookkeeping bits”). An OS uses an array to store the page table. What is the size of the page table? 1024 Bytes Furthermore, suppose the first 6 pages of a process map to frames 222 to 227 (as decimal numbers), and the last 5 pages of the process map to frames 1 to 5 (also decimal numbers). All other pages are invalid. Draw the page table, including the valid bit and the frame number. DONE Translate the following virtual addresses to physical addresses, and show how you obtain the answers. (Hint: You do not need to convert…
Exercise: A computer has 4 frames. Page size is 2KB (2048). The loaded time, the R and M bits for each page are shown below Page Frame Loaded time M R 11 1 15 3 13 4 5 5 7 6. 3 3 Question: compute the physical address of the following virtual address a) 1000 using FIFO b) 3100 using NRU c) 3100 using LRU d) 6200 using Second chance Note: consider each case separately
17) Suppose I have a system which uses 16-bit virtual addresses and 1Kb pages. How many logical pages can my system support? Show your work. 18) Now suppose the system from problem 17 has 8Kb of physical memory. Process P1 has the following page table: Page 0 1 2 3 4 5 6 7 Frame 2 0 5764 ETO 3 Translate the following binary logical addresses into binary physical addresses: a) 0000 0101 0101 0101 b) 0001 1000 0000 0000 c) 0001 1100 0001 0000
Fill in blank Suppose that linear page table is used where the memory addresses are 12-bit binary numbers and the page size is 256 bytes. If a virtual address in binary format is 101000011100, then the VPN (virtual page number) in binary format will be ---------
We are given a list of 64-bit memory address references, given as word addresses. Ox03, Oxb4, Ox2b, Ox02, Oxbf, Ox58, Oxbe, Ox0e, Oxb5, 0x2c, Oxba, Oxfd (A) For each of these references, identify the binary word address, the tag, and the index given a direct-mapped cache with 16 one- word blocks. Also list whether each reference is a hit or a miss, assuming the cache is initially empty. (B) For each of these references, identify the binary word address, the tag, the index, and the offset given a direct-mapped cache with two-word blocks and a total size of eight blocks. Also list if each reference is a hit or a miss, assuming the cache is initially empty. (C) You are asked to optimize a cache design for the given references (i.e. addresses). There are three direct-mapped cache designs possible, all with a total of eight words of data: (i) Cache1 has 1-word blocks, (ii) Cache2 has 2-word blocks, and (iii) Cache3 has 4-word blocks.
Assume a cache of 1 MB organized as 32 bytes each line. The main memory is 256 MB. a. Determine the number of blocks in main memory b. Determine how to split the address (s-r, r, w) for direct mapping. c. Determine how to split the address (s, w) for associative mapping. d. Determine how to split the address (s-d, d, w) for set-associative each cache set is 4 lines of the cache.
16-bit virtual addresses
3
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).

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