Assume an OS uses a 3-level page table; the page size of the system is 256 bytes with a 16-bit virtual address space.

INSTRUCTIONS TO CANDIDATES

ANSWER ALL QUESTIONS

 Assume an OS uses a 3-level page table; the page size of the system is 256 bytes with a 16-bit virtual address space; the ASID of the current process is 216. At a certain time, the system is having the following TLB states:

ASID VPN PFN   Valid Prot

216        0xBB 0x91 1 ???

112        0x05 0x91 1 ???

216        0xFF 0x23 1 ???

216        0x05 0x12 0 ???

Consider each instruction independently (e.g., for Question “b”, don’t worry how Question “a” changes the TLB). The “Prot” field in a TLB entry is marked as “???”, so no need to worry about that either. 

How many physical memory accesses are needed for each instruction (note not only the operand in instruction but the instruction itself needs to be fetched from physical memory as well)?

And briefly explain why.

(a) 0xAA10: movl  0x1111,  %edi

(b) 0xBB13: addl  $0x3,  %edi

(c) 0x0519: movl  %edi,  0xFF10

Related Questions

. The fundamental operations of create, read, update, and delete (CRUD) in either Python or Java

CS 340 Milestone One Guidelines and Rubric  Overview: For this assignment, you will implement the fundamental operations of create, read, update,

. Develop a program to emulate a purchase transaction at a retail store. This  program will have two classes, a LineItem class and a Transaction class

Retail Transaction Programming Project  Project Requirements:  Develop a program to emulate a purchase transaction at a retail store. This

. The following program contains five errors. Identify the errors and fix them

7COM1028   Secure Systems Programming   Referral Coursework: Secure

. Accepts the following from a user: Item Name Item Quantity Item Price Allows the user to create a file to store the sales receipt contents

Create a GUI program that:Accepts the following from a user:Item NameItem QuantityItem PriceAllows the user to create a file to store the sales receip

. The final project will encompass developing a web service using a software stack and implementing an industry-standard interface. Regardless of whether you choose to pursue application development goals as a pure developer or as a software engineer

CS 340 Final Project Guidelines and Rubric  Overview The final project will encompass developing a web service using a software stack and impleme