Functionality of hypethread processor, Computer Engineering

Assignment Help:

Hyper-threading works by duplicating those parts of processor which store architectural state but not duplicating main execution resources. This permits a Hyper-threading equipped processor to pretend to be two 'logical' processors to host operating system, allowing operating system to schedule 2 processed or threads concurrently. Where execution resources in a non-Hyper-threading capable processor aren't used by current task and particularly when processor is stalled a Hyper-threading equipped processor can use those execution resources to execute other scheduled task. 

Besides its performance implications, this innovation is transparent to Programs and operating systems. All that is needed to take advantage of Hyper-Threading is symmetric multiprocessing (SMP) support in operating system as logical processors emerge as standard separate processors.

Though it's likely to optimize operating system behaviour on Hyper-threading capable systems like Linux techniques explained in Kernel Traffic. E.g. consider an SMP system with two physical processors which are both Hyper-Threaded (for a total of four logical processors). If operating system's process scheduler is unaware of Hyper-threading it will treat all four processors similarly.

Consequently if just two processes are entitled to run it may decide to schedule those processes on two logical processors which happen to belong to one of the physical processors. So one CPU will be very busy while other CPU will be entirely idle, leading to poor overall performance. This can be avoided by improving scheduler to treat logical processors in a different way from physical processors; in a sense it's a limited form of scheduler changes which are needed for NUMA systems.


Related Discussions:- Functionality of hypethread processor

Objectives-classification of parallel computers , Objectives After goi...

Objectives After going through this unit, you should be able to: Describe the diffrent criteria on which classification of parallel computers are based; Examine the

De morgan''s laws - artificial intelligence, De Morgan's Laws Continuin...

De Morgan's Laws Continuing with the relationship between  ∧  and  ∨ , we can also use De Morgan's Law to rearrange sentences involving negation in conjunction with these conne

Simplified boolean expression, Simplified the Boolean Algebra (x + y)(x + z...

Simplified the Boolean Algebra (x + y)(x + z) simplifies to ? Ans. x + yz as simplified the Boolean Algebra expression. [(x + y) (x + z)] = xx + xz + xy + yz = x + xz + xy + y

Convert ascii code to its bcd equivalent, Convert ASCII code to its BCD equ...

Convert ASCII code to its BCD equivalent. This can be achieved by simply replacing bits in upper four bits of byte by four zeros. For illustration the ASCII '1' is 32h = 0010B. By

We declare a table control in the abap/4 program, How can we declare a tabl...

How can we declare a table control in the ABAP/4 program? Using the syntax controls type tableview using screen .

What are the functions of dispatcher, What are the functions of dispatcher?...

What are the functions of dispatcher? There are four fuctions of dispatcher:- A)  Equal distribution of transaction load to the work processes.  B) Management of buffer a

Microprocessor, what is opcode for addition and subtraction

what is opcode for addition and subtraction

What are the categories of radio communication, What are the categories of ...

What are the categories of Radio communication 1.  Sky wave or ionosphere communication 2.  Line-of-sight (LOS) microwave communication limited by horizon 3.  Troposphere

Write a program to perform multiplication of two numbers, Q. Write a progr...

Q. Write a program to perform multiplication of two numbers in specified radix. Check that entered numbers are in specified radix or not else error message should be displayed.

History of parallel computers, History Of Parallel Computers The test ...

History Of Parallel Computers The test with and implementations of the utilize of parallelism started year back in the 1950s by the IBM.  The IBM enlarges computers also calle

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