Understanding Operating Systems Chapter 3

938 words 4 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.
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Step 10: Page D is swapped into secondary storage.*
Step 11: Page E is moved into the first available page frame.
Step 12: Page A is already available.
Step 13: Page C is already available.
Step 14: Page E is swapped into secondary storage.*
Step 15: Page B is moved into the first available page frame.
Step 16: Page A is swapped into secondary storage*
Step 17: Page D is moved into the second available page frame
Step 18: Page E is already available.
The fail ratio is 6/12 or 50% and the success ratio is 6/12 or 50% B) Now with 4 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 B is moved into the third available page frame.
Step 4: Page D is moved into the fourth available page frame
Step 5: Page A is already available.
Step 6: Page C is already available.
Step 7: Page B is swapped into secondary storage.*
Step 8: Page E is moved into the third available page frame
Step 9: Page A is already available
Step 10: Page C is already available
Step 11: Page D is swapped into secondary storage.*
Step 12: Page B is moved into the fourth available page frame
Step 13: Page E is swapped into secondary storage*
Step 14: Page D is moved into the third available page frame

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