18
for class on
Wednesday
Dec. 1, 2010
Please read Sections 5.4 and 5.5 of the text.
Please turn in a written response to this question:
1. Exercise 5.10.1, using row b of the table on page 557.
Then, be prepared to discuss the following in class:
2. If we use the word cache in its generic sense, we can think of physical memory as a cache of recently-used virtual memory pages. We can further think of a TLB as a cache of virtual-to-physical address translations. We will explore these analogies in some detail, considering how the three types of cache are similar or different along a number of different dimensions, among them: block size, reads versus writes, hit ratio, replacement policy, and how misses are serviced. To prepare for this discussion you might want to make a table of some kind.
A miss in physical memory is a page fault. What do you think should happen to the cache and TLB on a page fault?