Suppose you have a byte-addressable virtual address me system with 8 virtual pages of 64 bytes each, and 4 page fra Assuming the following page table, answer the questions bel a) How many bits are in a virtual address? b) How many bits are in a physical address? c) What physical address corresponds to the following vir addresses this is the case)? (if the address causes a page fault, simply indi i) 0×0B Page # Frame # Valid Bit ii) ОхВА iii) 0×1C 3 1 1 1 iv) ОхЗА v) 0x34 OHIN3

Suppose you have a byte-addressable virtual address me system with 8 virtual pages of 64 bytes each, and 4 page fra Assuming the following page table, answer the questions bel a) How many bits are in a virtual address? b) How many bits are in a physical address? c) What physical address corresponds to the following vir addresses this is the case)? (if the address causes a page fault, simply indi i) 0×0B Page # Frame # Valid Bit ii) ОхВА iii) 0×1C 3 1 1 1 iv) ОхЗА v) 0x34 OHIN3

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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21. 21. Suppose we have 2¹0 bytes of virtual memory and 28 bytes of physical main memory. Suppose the page size is 24 bytes. 1. a) How many pages are there in virtual memory? 2. b) How many page frames are there in main memory? 3. c) How many entries are in the page table for a process that uses all of virtual memory?
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
8.9. The IBM System/370 architecture uses a two-level memory structure and refers to the two levels as segments and pages, although the segmentation approach lacks many of the features described earlier in this chapter. For the basic 370 architecture, the page size may be either 2 Kbytes or 4 Kbytes, and the segment size is fixed at either 64 Kbytes or 1 Mbyte. For the 370/XA and 370/ESA architectures, the page size is 4 Kbytes and the segment size is 1 Mbyte. Which advantages of segmentation does this scheme lack? What is the benefit of segmentation for the 370?
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 ---------
There are several parameters that impact the overall size of the page table. Listed below are key page table parameters. Virtual Address Size Page Table Entry Size Page Size 8 KiB 32 bits 4 bytes (a) Given the parameters shown above, calculate the total page table size for a system running 5 applications that utilize half of the memory available.
Q.2 Suppose a system has a logical address space of size 25 (m=5), a page size of 4 bytes, and a physical memory of 128 bytes. Given the following page table, find out the respective physical addresses for each of the logical address listed in Table 2. (Note: all addresses are expressed in decimal number system) Table 1: Page table 0 2 5 7 0 15 1 2 3 4 5 18 6 20 7 22 Table 2: Fill out this table with corresponding physical memory addresses Logical Address Physical Address 0 6 10 17 23