Question

What is the advantage of using a translation look-aside buffer (TLB), also called associative memory, in the logical-physical address mapping process? Explain how the logical-physical address mapping logic works using an inverted page table. When does the MMU detect page-fault? Explain four of the main steps for resolving page faults.

Answer 1

A) The advantage of using TLB is that it is used for storing the recent transactions of the virtual memory to the physical memory and this is used for the sole purpose of fast retrieval of data

B) When using an inverted table the logical-physical address mapping logic works as a hashing function by connecting pieces of the hardware of logical address and getting them translated to the physical address. this hash function in turn generates the index to the frame table

C) The MMU detect page-fault when there is an exception been raised by the computer when a program is ran to access a memory page and this program is not mapped out by the MMU in the process

The four steps are :

The first step is to check on the memory address requested to make sure of a valid memory request.

The second step is to setup A free frame and a disk operation that is scheduled for getting the necessary page from the disk.

As the the I/O is been completed the processor table is been updated

Finally the Instruction will get restarted from the beginning indicating what might have been caused by a page fault.

Step-by-step explanation:

A) The advantage of using TLB is that it is used for storing the recent transactions of the virtual memory to the physical memory and this is used for the sole purpose of fast retrieval of data

B) When using an inverted table the logical-physical address mapping logic works as a hashing function by connecting pieces of the hardware of logical address and getting them translated to the physical address. this hash function in turn generates the index to the frame table

C) The MMU detect page-fault when there is an exception been raised by the computer when a program is ran to access a memory page and this program is not mapped out by the MMU in the process

The four steps are :

The first step is to check on the memory address requested to make sure of a valid memory request.

The second step is to setup A free frame and a disk operation that is scheduled for getting the necessary page from the disk.

As the the I/O is been completed the processor table is been updated

Finally the Instruction will get restarted from the beginning indicating what might have been caused by a page fault.