Quiz submission record for quiz7-1-1 at Mon Aug  2 10:17:31 2004:

Your Answer for Question 1:
A virtual address is an address at a virtual memory, which represent and mange the two levels of the memory hierarchy in the main memory alone. A physical address is the real address at the main memory. To get from a va to a pa, one has to translate it using a combination of hardware and software. This can be done through memory mapping (or address translation) as the virtual addresses can be mapped to physical addresses.

Your Answer for Question 2:
The benefits of having the VM system allocate pages in fixed-size chunks is that we can eliminate the need to find a contiguous block of memory to allocate to a program. Instead, the operating system can only find sufficient number of usable pages here and there.
Bigger chunks may be desireable because the page fault in virtual memory takes too many cycles. If our blocks are bigger, then the miss rate may decrease.
Smaller chunks may be desireable because it's easier to implement and we'll be allowed to have more pages in the virtual memory.


Your unique submission ID is quiz7-1-1-cs61c-ew-1091467051-569.