Virtual Memory
This lesson discusses the difference between virtual and physical memory. Virtual memory is used by programs and must be translated to physical memory. Since the translation can be slow, a Translation LookAside Buffer (TLB) is used. The notes for this lesson can be found here.
Page Size Quiz
Below is a quiz from the lectures that has us calculate the number of physical memory frames for a system and then the number of page table entries for each process.
Address Translation Quiz
Below is a quiz from the lectures that demonstrates how to conduct address translation.
Flat Page Table Size Quiz
Below is a quiz from the lectures that demonstrates how to calculate the size of flat page tables for multiple architectures.
Two Level Page Table Size
The below excerpt from the course describes how we can save memory using multi level page tables.
4 Level Page Table Quiz
The below quiz from the lectures demonstrates how to calculate the amount of memory needed for a page table with 4 levels.
Virtual to Physical Translation Quiz
The below quiz from the lectures demonstrates how to calculate the number of cycles necessary necessary to conduct virtual to physical address translation.
The below quiz from the lectures demonstrates the same as above except the page table entries are cached.
TLB Size Quiz
Below is a quiz from the lectures covering how we can calculate the approx. size of the TLB to achieve similar performance to the cache.
TLB Performance Quiz
Below is quiz demonstrating how to calculate TLB performance for a given set of memory accesses by a program.
