Question: Compare and contrast the ideas of virtual memory and virtual machines. How do the goals of each compare? What are the pros and cons of

Compare and contrast the ideas of virtual memory and virtual machines. How do the goals of each compare? What are the pros and cons of each? List a few cases where virtual memory is desired, and a few cases where virtual machines are desired.

One of the biggest impediments to widespread use of virtual machines is the performance overhead incurred by running a virtual machine. The table below lists various performance parameters and application behavior. a. b. Base CPI 1.5 1.75 Priviliged 0/S Accesses per 10,000 Instructions 120 90 Performance Impact to Trap to

a. b. Base CPI 1.5 1.75 Priviliged 0/S Accesses per 10,000 Instructions 120 90 Performance Impact to Trap to the Guest O/S 15 cycles 20 cycles Performance Impact to Trap to VMM 175 cycles 140 cycles 1/0 Accesses per 10,000 Instructions 30 25 1/0 Access Time (Includes Time to Trap to Guest 0/S) 1100 cycles 1200 cycles

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Answer Virtual Memory vs Virtual Machines A Comparison Virtual Memory Goal Goal Provide an illusion of a larger contiguous memory space than physicall... View full answer

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