Q h 7thECE2006

A logical address space of 12 pages of 1024 bytes each mapped to a physical memory of 64 frames. What would be the minimum number of bits in logical address?

Q i 7thECE2006

What would be the minimum number of bits in physical address?

Q 2 7thECE2006

A demand paged virtual system has the following parameters

  1. Time to serve page faults:
    • When a new frame is allocated: 12 mili seconds
    • When a modified page is replaced: 20 mili seconds
  2. Memory access time: 200 nano seconds
  3. While serving a page fault:
    • Probability of allocating a new frame: 30%
    • Probability of allocating a modified frame: 70%

Find the maximum page fault rate such that degradation in memory access time is not more than 20%.

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