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

Discuss the csma/cd and csma/ca protocols, Discuss the CSMA/CD and CSMA/CA ...

Discuss the CSMA/CD and CSMA/CA protocols. CSMA/CD: this is an access method used mainly with LANs configured in a bus topology. Along with CSMA/CD, any station (node) can se

Show the programmes for parallel systems, Q. Show the Programmes for Parall...

Q. Show the Programmes for Parallel Systems? Adding elements of an array using two processor      int sum, A[ n] ;  //shared variables

PHB, Power pc h bus

Power pc h bus

What do you mean by information system, Q. What do you mean by Information ...

Q. What do you mean by Information System? An information system is an planned combination of hardware, people, communication networks, software and data resources that transfo

Additions of numbers by using 2’s complement, Add +25 to -15 by using 2's c...

Add +25 to -15 by using 2's complement ? Ans. Firstly convert the numbers 25 and 15 in its 8-bit binary equivalent and determine the 2's complement of 15, after that add +25 to -

Explain XLAT instruction with help of example, Q. Explain XLAT instruction ...

Q. Explain XLAT instruction with help of example? Let's presume a table of hexadecimal characters signifying all 16 hexadecimal digits in table: HEXA      DB      '012345678

Differentiate b/w pre-emptive and non-pre-emptive scheduling, Differentiate...

Differentiate between pre-emptive and non-pre-emptive scheduling. Pre-emptive scheduling : in its approach, center processing unit can be taken away from a process if there is a

Define end directive and assume directive, END DIRECTIVE: ENDS directive e...

END DIRECTIVE: ENDS directive ends a segment and ENDP directive ends a procedure and END directive ends whole program which appears as last statement. ASSUME Directive:   An .

What are the engineering applications in parallel computing, Engineering Ap...

Engineering Applications A number of the engineering applications are: 1. Simulations of artificial ecosystems  2. Airflow circulation over aircraft components Airflow

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