'Working set model' presentation slideshows

Page Replacement Algorithm

Page Replacement Algorithm. Performance of Demand Paging. Three Major Components of the Page-Fault Service Time Service the Page-Fault Interrupt. Read in the Page. Restart the Process. ? Disk I/O is do expensive. Page Replacement(1). Need for Page Replacement Fig 8.5 Page Replacement

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Project: Page Replacement Algorithms

Project: Page Replacement Algorithms. Textbook: pages 496-500. Assignment. implement different page replacement algorithms (global and local) generate reference strings test and compare algorithms using reference strings. Overall Organization. generate reference string RS. parameters:

948 views • 25 slides

Cleaning Policy

Cleaning Policy. When should a modified page be written out to disk? Demand cleaning write page out only when its frame has been selected for replacement (the process that page faulted has to wait for 2 page transfers) Precleaning

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examples

examples. Working Set model. Z=accdbcecead r=4, Initial resident set = {a,d,e} a:t=0, d:t=-1, e:t=-2. Page Fault Frequency. Z=ccdbcecead r=2, t=0,{a,d,e}.

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