In most x86 systems, pages are __________ (how big?) bytes. This implies that, w

Question

In most x86 systems, pages are __________ (how big?) bytes. This implies that, when a memory reference is made to a byte that is not loaded into RAM at the time of the access, many bytes are transferred instead of just that single byte. This larger size paging idea helps processor execution because of the principle of _______, which means that other is a high probability that bytes in the area of a byte that is being accessed will be needed in the near future. We discussed cache and RAM, and the relationship between the two. A page in cache that has been changed, but the copy in RAM remains unchanged, is called cache ________. There is a standard cache protocol called MESI, which defines cache page states. Write the state name for each of the state descriptions: a. _______ the cache page is unchanged, i.e. it matches main memory. It may be designated only for one application. b. _______ the cache page is available to other applications, and is unchanged (matches main memory) c. _______ The cache page is not designated for any application at all d. ________ the cache page has been changed and doesn't match the copy in RAM any more

Explanation / Answer

d)in x86 systems pages are 40b96 bytes. Actually it contains 4kb fof page size. By convarting into bytes it is 4096 bytes.

The larger size paging idea helps processor execution because of the principle of distributed shared memory which means that bytes in the area of a byte is being accesses will be needed in te near future.

e) A page in cache that has been changed,but the copy in RAM remains unchanges,is called cache LRU-WH scheme

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