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2 cards from this section. Quick, good the night before a test.
What happens during a cache hit?
Think about when the data you need is already in place.
Define a cache miss.
Consider what happens if you need something labeled but it's missing.
What is a cache hit?
If the data you want is in the cache, that's a hit.
Which part of a memory address does the cache index use?
Think about how you find the location of a physical object.
If a cache has 32 lines and an address accesses data that fails to map directly into any line, how would the system decide which line to replace?
Understand how caches manage storage.
Calculate the tag bits required for a cache with 256 lines, if the total memory address is 32 bits.
Break down the address into index and offset parts.
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