es a cache request that eventually reaches the cache when a block is being flushed from the write buffer back to main memory. To what ext

A write buffer will bring the data from main memory back to the CPU if it is too big to fit in the cache. What should we do next?

Hi, professor! I'm not sure about the following question. Consider a cache memory that provides three hundred 16-byte blocks. Now consider that you are processing all the data in a two-dimensional array of, say, four hundred rows by four hundred columns, using a pair of nested loops. Assume that the program stores the array column by column. You can write your program to nest the loops in either direction, that is, process row by row or column by column. Explain which way you would choose to process the data. What is the advantage? Conversely, what is the disadvantage of processing the data the other way? What effect does choosing the incorrect way have on system performance?

The write buffer sends a block back to main memory while the processor issues a request that the cache cannot fulfill. What ought to occur in this scenario?

Suppose a computer using fully associative cache has 224 words of main memory and a cache of 512 blocks, where each cache block contains 16 words. How many blocks of main memory are there? What is the format of a memory address as seen by the cache, i.e., what are the sizes of the tag and offset fields? To which cache block will the memory reference 17042416 map?

1. Concerning the memory hierarchy, there is a trade-off among the three key characteristics: capacity, access time, and cost. What is the relationship between these three? 2. What happens if a computer system only contains registers and main memory, but no cache? Justify your answer 3. The replacement algorithm chooses (within the constraints of the mapping function) which block to replace when a new block is to be loaded into the cache and the cache already has all slots filled with other blocks. Suggest a strategy that has at least one advantage over the least-recently-used (LRU) algorithm. Justify your answer

The processor will submit a request that cannot be met in the cache while the write buffer will return a block to the main memory. What are some possible next steps in this scenario?

Assume the processor sends an incomplete request to the cache while a block is being returned from the write buffer to main memory. The following sequence of events should occur.

If the processor sends a request that isn't serviced by the cache, and the write buffer happens to be sending a block back to main memory at the same time, what should happen?

Let's pretend the CPU issues a cache request that eventually reaches the cache when a block is being flushed from the write buffer back to main memory. To what extent should this proceed?

Assume that a block is being returned from the write buffer to main memory when the processor makes a partially completed request to the cache. The events should go as follows.

When the cache cannot handle a request, the CPU sends the data back to main memory through the write buffer. So, what ought to be done here?

Before we can store (save) or retrieve (load) data in and out of the main memory, we need to provide the memory address to the memory control unit. This address uniquely identifies one single location (word or record) of the memory. Suppose this address is placed in Memory Address Register (MAR) prior to each memory access. What is the size of MAR for a 4GB RAM? (RAM is byte- addressable and each word is 2 bytes). Show all the work.