What is write-back or copy-back protocol, Computer Engineering

Assignment Help:

What is write-back or copy-back protocol?

For a write operation using this protocol during write-hit: the method is to update only the cache and to mark it as updated with an associated flag bit, often called the modified or dirty bit. The main memory location of the word is updated later, when the block having this marked word is to be removed from the cache to make room for a latest block.

For a write-miss: the block having the addressed word is first brought into the cache, and then the deserved word in the cache is overwritten with the latest information.

 

 


Related Discussions:- What is write-back or copy-back protocol

Explain programmer visible registers, Q. Explain Programmer Visible Registe...

Q. Explain Programmer Visible Registers? These registers can be accessed employing machine language. In general we encounter four kinds of programmer visible registers.

Which process is used for page reference, Locality of reference implies tha...

Locality of reference implies that the page reference being made by a process is Ans. Locality of reference means that the page reference being made through a process is proba

What is parallel sections construct, What is Parallel Sections Construct? ...

What is Parallel Sections Construct? The parallel sections construct is a shortcut for specifying a parallel construct comprising one sections construct however no other statem

Explain the operation of JK flip flop when all inputs are 0, Write the trut...

Write the truth table for a clocked J-K flip-flop that is triggered by the positive-going edge of the clock signal. Explain the operation of this flip-flop for the following condit

Common functions of interrupts - computer architecture, Common Functions of...

Common Functions of Interrupts: An Interrupt transfers control to the interrupt service routine, generally through the interrupt vector table, which contains the addresses

Eliminating hazards - computer architecture, Eliminating hazards of pipeli...

Eliminating hazards of pipeline -  computer architecture: We can delegate the work of eliminating data dependencies to the compiler, which can fill up in suitable number of NO

Blocking and non-blocking network, Blocking and Non-Blocking network In...

Blocking and Non-Blocking network In non-blocking networks the route from any free input node to any free output node can always be offered. Crossbar is an best example of non-

What is the difference between eprom and eeprom, Question 1: (a) Wha...

Question 1: (a) What is the difference between IT (Information Technology) and ICT(Information Communication Technology) (b) Explain why information systems are so im

Define the bandwidth of a monitor, Q. Define the Bandwidth of a monitor? ...

Q. Define the Bandwidth of a monitor? Bandwidth is the amount of signal the monitor can handle and it is rated in MHz .This is the most usually quoted specification of a monito

What is information technology, Information Technology is nothing but the s...

Information Technology is nothing but the study, design, development, execution, support and management of computer based information systems mainly the applications software & har

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd