Paging Concept OS - Cold Misses

Question

What is the meaning of cold misses in context of paging ?

PS: HOW WAS THE QUESTION FRAMED ?Just for sake of understanding

Suppose the reference strings are 1,2,3,4 1,2 and u r using FIFO page replacement algorithm having frame size of 3 . Then find the no. of page faults along with cold misses.

Answer 1

Cold misses are misses which occur when the page is referenced for the first time and is not found in memory.

Cold Miss = Compulsory Miss

Example:

• FIFO

Ref	Frame	Frame	Frame
1	1			Cold Miss
2	1	2		Cold Miss
3	1	2	3	Cold Miss
4	4	2	3	Cold Miss
1	4	1	3	Miss
2	4	1	2	Miss

Total Misses = 6
Cold Misses = 4

Comments

So , what is the answer if it is asked like "find total no of page faults including cold misses "?

Is its 10 ?