Understanding Operating Systems Chapter 3 Essay

906 WordsJun 3, 20144 Pages
Topic A Operating System: Windows 8.0 Open Computer. Click properties. In the the left pane click on Advanced system settings Under performance Click Settings Click the Advanced tab. Under Virtual Memory you can change the Virtual Memory. On my computer the minimum size is 16MB and the maximum recommended size is 3313 MB. Topic B Cache memory is on the main chip, it can be accessed much more quickly than RAM, which is restricted by the BUS speed. Data is held in the Processor cache memory, where it is close to the processor, thus speeding up the operation of the processor. The implementations of cache memory on multi-core chips do vary from one manufacturer to another but have to adhere to a certain code. Schauer, Bryan.…show more content…
Step 15: Page F is moved into the third available page frame.* The fail rate is 4/11 or 36% and the success ratio is 7/11 or 64% B) Now with four page frames. Step 1: Page A is moved into the first available page frame. Step 2: Page C is moved into the second available page frame. Step 3: Page A is already available. Step 4: Page B is moved into the third available page frame. Step 5: Page A is already available. Step 6: Page D is moved into the fourth available page frame Step 7: Page A is already available. Step 8: Page C is already available. Step 9: Page D is already available. Step 10: Page B is swapped into secondary storage. Step 11: Page E is moved into the third available page frame* Step 12: Page A is swapped into secondary storage. Step 13: Page F is moved into the first available page frame.* The fail ratio is 2/11 or 18% and the success ratio is 9/11 or 82% C) From these examples I can make a general statement that the more page frames available the higher the success ratio is and the least page frames available the higher fail ratio. Exercise 6 A)Only three page frames. a, c, b, d, a, c, e, a, c, b, d, e Step 1: Page A is moved into the first available page frame. Step 2: Page C is moved into the second available page frame. Step 3: Page B is moved into the third available page frame. Step 4: Page A is swapped into secondary
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