Virtual memory Flashcards
1
Q
What is the Page table used for
A
to map virtual adresses to physical addresses
2
Q
How many pages of physical memory can we store
A
2^(m-p)
3
Q
How many pages can we store in virtual memory
A
2^(v-p)
4
Q
How many bits are there in one entry and why
A
m-p
m is total number of bits in physical and p is total number of bits needed to represent the size of the page
so p is the offset
also because 2^m /2^p -> obviously means how many pages can be stored
so 2^m-p is number of pages meaning m-p bits to store a page
5
Q
what is page fault
A
when the page is stored on the disk causes and interrupt to tansfer the page
6
Q
what is the translation lookaside buffer
A
cache to store page lookup table
7
Q
why use the TLB
A
reduce time to translate virtual address to physcal address down to 1 clock cycle
