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Page Fault rates

Discussion in 'Windows' started by Ravish, Oct 23, 2008.

  1. Ravish

    Ravish New Member

    Hello;
    I am not sure if this is the right spot to post this but here goes...

    I want to know how I calculate the highest acceptable page-fault rate not exceeding 100 nano's if I have a demand paging system with the following knowns:

    EAT - 50 nanos
    Valid page in page table
    Page fault service time (PFS) = 5 milli
     
  2. neo_vi

    neo_vi New Member

    The Formula is
    EAT (Effective Access Time)=(1 – p) x memory access time + p (page fault overhead + [swap page out,if needed] + swap page in + restart overhead)

    Where p is Page Fault Rate
    0<= p <=1

    Page Fault time = page fault overhead + [swap page out, if needed] + swap page in +
    restart overhead

    I think with this formula u can calculate
     

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