CPU Cache

http://bad-concurrency.blogspot.hk/2014/12/the-uncanny-valley-of-l3-cache.html

https://en.wikipedia.org/wiki/Cache_(computing)#Cache_organization_and_structure

https://en.wikipedia.org/wiki/CPU_cache

https://www.cs.umd.edu/class/sum2003/cmsc311/Notes/Memory/set.html

http://csillustrated.berkeley.edu/PDFs/handouts/cache-3-associativity-handout.pdf