Jnana Bhaskar Akhil Idury Posted on Dec 03, 2019 11:14 PM
If CPU is referred to a page which is not loaded into Main Memory. Then it is known as page fault. Page fault occurs while searching for a page but not for a word. So, when CPU fetches page table and required page is missing, then OS takes charge and loads the required page from secondary memory to Main memory . The time taken for loading is known as Page Fault Service Time. After loading into main memory , fetching for a word takes negligible time compared to Page Fault Service time.