Question

1. 13 points] Three C's of Cache Misses the categories to increase, decrease, or whether to receive credit. er the following modifications to cache parameters wilhave no will have no ou can assume the baseline cache is set associative. Exp the modification parameters (number of sets, number o Assume that in each case the other cache parachgn femacity misses s line) and the rest of the machine design remain the same. ache Modification Compulsory misses Conflict Capacity misses misses Increasing # of sets Increasing # of ways Increasing # of bytes/line

Answer 1

Compulsory miss:-This type of miss occurs when the first time referenced block is miss in cache memory.

Conflict miss:-This type of miss occurs when a particular block is referenced second or more times and also the reference turns out to be miss in cache memory.

Capacity misses:-This type of miss occurs when the cache is full.

When we increase the number of sets means we are reducing the number of lines in a single set.due to this associativity decreases.so,as a result conflict misses will increase because now there will be less chance that second time referenced block will be hit as there are less lines in a set.other two misses will be unaffected.

When we increase the number of ways then we are increasing the number of lines in a set.due to this number of sets decreases and associativity increases.Due to this,conflict misses will reduce because now,there are more lines in a set so,it us most likely that 2nd time or more referenced block will get a line.other two misses will remain  unaffected.

When we increase the number of bytes per line then lines size will increase as result number of compulsory misses will reduce because they happen solely because of low line size.other two misses will remain unaffected.

Cache modification	Compulsory misses	Conflict misses	Capacity misses
Increasing # of sets	No effect	Increases	No effect
Increasing # of ways	No effect	Decreases	No effect
Increasing # of bytes/line	Decreases	No effect	No effect