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What is the point of using an inverted page table?

Discussion in 'Inverts' started by Shanerwood, Feb 5, 2011.

  1. Shanerwood

    Shanerwood Junior Poster

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    I am looking at different ways in which a page table could be organized, one of which ways is using an inverted page table. From what I can understand ... there is a row for every frame in the disk, so we essentially have a page table which looks exactly like the structure of the actual disk, which defeats the purpose of having a page table to begin with
     
  2. Gerryd

    Gerryd Plant Guru Team
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    Hi,

    I am not sure how page tables relate to the planted tank hobby....

    I think you are on the wrong forum...
     
  3. Biollante

    Biollante Lifetime Charter Member
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    Provided of Course The KH, GH pH Balance is Maintained

    Hi,

    Many of my plants have found that inverted page tables can be reasonably efficient.:gw
    • Fewer accesses are needed if you can have a successful search in only a couple of probes (on average):)
    • when doing a lookup in a page table that is more than a couple of levels deep.;)
    As address spaces get bigger, page tables get more unwieldy. A 64-bit address might imply something like 5 levels of table (10 bit index for all but last):eek: many plants and a few critters have a hard time keeping track. :(

    As virtual address spaces grow so much bigger than physical addresses, it becomes possible that space and time can be saved by inverting the page table -- mapping physical to virtual, instead of the other way around.

    I have found that Vals and Sags benefit most and E. tenellus is just a total pig about it either way.:cool:

    Biollante
     
  4. Gbark

    Gbark Guru Class Expert

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    Ipt

    Around here IPT stands for "irresistible Planted Tank" :D
     
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