Log In
0 votes

You are given the following data about a virtual memory system:

  1. The $TLB$ can hold $1024$ entries and can be accessed in $1$ clock cycle $(1\: nsec).$ 
  2. A page table entry can be found in $100$ clock cycles or $100\: nsec.$ 
  3. The average page replacement time is $6\: msec.$

If page references are handled by the $TLB\:\: 99\%$ of the time, and only $0.01\%$ lead to a page fault, what is the effective address-translation time?

in Operating System 62 views

Please log in or register to answer this question.

Related questions

0 votes
0 answers
Write a program that demonstrates the effect of $TLB$ misses on the effective memory access time by measuring the per-access time it takes to stride through a large array. Explain the main concepts behind the program, and describe what you expect the output to ... . Repeat part $(b)$ but for an older computer with a different architecture and explain any major differences in the output.
asked Oct 26, 2019 in Operating System Lakshman Patel RJIT 90 views
0 votes
1 answer
Consider the following C program: int X[N]; int step = M; /* M is some predefined constant */ for (int i = 0; i < N; i += step) X[i] = X[i] + 1; If this program is run on a machine with a $4-KB$ page size and $64$-entry $TLB,$ what values ... $TLB$ miss for every execution of the inner loop? Would your answer in part $(a)$ be different if the loop were repeated many times? Explain.
asked Oct 26, 2019 in Operating System Lakshman Patel RJIT 25 views
0 votes
0 answers
Write a program that can be used to compare the effectiveness of adding a tag field to $TLB$ entries when control is toggled between two programs. The tag field is used to effectively label each entry with the process id. Note that a nontagged $TLB$ can be ... your simulation behaves as expected for a simple (but nontrivial) input example. Plot the number of $TLB$ updates per $1000$ references.
asked Oct 26, 2019 in Operating System Lakshman Patel RJIT 71 views