Illustrate the cache memory operation, Computer Engineering

Assignment Help:

Q. Illustrate the Cache Memory Operation?

It comprises a copy of a part of main memory contents. When a program is running and CPU tries to read a word of memory (instruction or data) a check is made to decide if word is in cache. If so that word is delivered to CPU from cache. If not then a block of main memory comprising some fixed number of words including requested word is read in the cache and then requested word is delivered to CPU. Due to the feature of locality of reference when a block of memory word is fetched in cache to satisfy a single memory reference it is expected that there will soon be references to other words in that block. Which is the next time CPU attempts to read a word it's very probable that it finds it in cache and saves time required to read word from main memory.

Various computer systems are designed to have two separate cache memories known as data cache and instruction cache. Instruction cache is used for storing program instruction and data cache is used for storing data. This allows faster identification of availability of accessed word in cache memory as well as it helps in further improving processor speed.  Several computer systems are also designed to have multiple levels of caches (like level one and level two caches generally referred to as L1 and L2 caches). L1 cache is smaller than L2 cache and is used to store more often accessed data/instruction as compared to those in L2 cache.

409_Illustrate the Cache Memory Operation.png


Related Discussions:- Illustrate the cache memory operation

Commutatively of connectives - artificial intelligence, Commutatively of Co...

Commutatively of Connectives You will be aware from the fact that some arithmetic operators have a property that it does not matter which way around you give the operator input

Find a connection factory, Why do I get an exception when trying to find a ...

Why do I get an exception when trying to find a connection factory? Ans) The exception is regularly something like java.io.InvalidClassException or java.lang.NoClassDefFoundErro

What features are needed to implement top down parsing, The features are ne...

The features are needed to implement top down parsing are? Ans. Source string marker, Prediction making mechanism and also matching and backtracking mechanism features are need

Define device interface, Define device interface. The buffer registers ...

Define device interface. The buffer registers DATAIN and DATAOUT and the status flags SIN and SOUT are part of circuitry commonly called as a device interface.

Explain the working of a 3-bit D/A converter, With the help of R-2R binary ...

With the help of R-2R binary network, explain the working of a 3-bit D/A converter and derive an expression for the output voltage. Ans: We see a 3-bit R-2R ladder D/A netwo

Logic programs, Logic Programs: A subset of first order logic is "Logi...

Logic Programs: A subset of first order logic is "Logic programs". However logic program having a set of Horn clauses that are implication conjectures when there is a conjunct

Accessing a cache - computer architecture, Accessing a Cache:  Direct ...

Accessing a Cache:  Direct mapping: (Block address) modulo (Number of cache block in the cache) The valid bit indicate whether an entry contain a valid address.

What are the types of operations required for instructions, What are the va...

What are the various types of operations required for instructions?  Data transfers among the main memory and the CPU registers Arithmetic and logic operation on data

What is time slicing, What is time slicing? With this technique each pr...

What is time slicing? With this technique each program runs for a short period known as a time slice, and then another program runs for its time slice and so on.

Contact-based keyboards, Contact-based keyboards employ switches directly. ...

Contact-based keyboards employ switches directly. Though they have a comparatively shorter life they are the most preferred type these days because of their lower cost.  Three such

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