Quiz submission record for quiz7-1-2 at Mon Aug  2 22:16:50 2004:

Your Answer for Question 1:
Although the TLB is smaller than the L1 cache, the TLB references pages while the L1 cache holds blocks.  Pages are larger than cache blocks so for the duration of a working set, we are more likely to stay within a page than a cache block.  We would probably access many different blocks which will lead to more misses than the TLB which references pages.

Your Answer for Question 2:
The system would not work as well if we placed the SPN to the right of the 2PN because of how spatial locality works.  Programs will access memory as the memory addresses are continguous.  However, if the SPN bits are to the right of the 2PN bits, the "adjacent" virtual memory addresses may map to different SPN page tables which will map to a different page.  Virtual memory uses pages (or chunks) of memory in the first place to take advantage of spatial locality in programs and in the way that disk accesses take place.  Switching the bit patterns will invalidate these gains.


Your unique submission ID is quiz7-1-2-cs61c-cj-1091510210-841.