Two Level Page Table Size

Thus here our outer page table page table 2 can be stored in one frame.

Two level page table size.

It asks to compute the memory space needed for a two level page table. But if still the size of page table is more than. With different numbers we could have a very large top level page table. This fits in one page so there is no reason to split it further.

So size of outer page table 2 10 4b 4kb. A page table is the data structure used by a virtual memory system in a computer operating system to store the mapping between virtual addresses and physical addresses virtual addresses are used by the program executed by the accessing process while physical addresses are used by the hardware or more specifically by the ram subsystem. 38 12 26 bits number of physical pages. If so we could repeat this process by paging the top level page table thus introducing another.

The logical addresses are 32 bit page size is 4kb and the page entry size is 4 bytes. 238 bytes offset or displacement field in pa. 212 bytes 4kb page frame number field in pa. 2 level page tables physical address pa.

From the page size i found out that the offset is 12bits from the 32 of the memory address and that every page has 1024 entries. For a process is using 1gib address space find out size of 1 level page table and 2 levels page table when page table directory has got 1024 entries. Thus we can stop here. 238 212 226 pa.

Thus the total size of the top level page table is 2 10 entries 2 2 bytes per entry 2 12 bytes 4kb. 12 bits page size. It is also known as hierarchical paging. 32 bit virtual address 4kib per page 4b size of page table entrie 1 gib size of address space.

38 bits physical address space. The entries of the level 1 page table are pointers to a level 2 page table and entries of the level 2 page tables are pointers to a level 3 page table and so on. The page table is a key component of virtual address.