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

State in brief about virtual memory, What is Virtual memory The term v...

What is Virtual memory The term virtual memory signifies something that appears to be present though actually it is not. Virtual memory technique enables users to use more mem

Performance instrumentation in parallel computer, Performance instrumentati...

Performance instrumentation focuses on how to resourcefully collect information about computation of parallel computer. Method of instrumentation mostly tries to capture informatio

Define assembly, Define Assembly Assembly is a one deployable unit that...

Define Assembly Assembly is a one deployable unit that contains information about the execution of classes, structures and interfaces. it also keeps the information about itsel

C programming, write a program to find the area under the curve y=f(x) betw...

write a program to find the area under the curve y=f(x) between x=a and x=b,integrate y=f(x) between the limits a and b

EME, How can i made Carnot engine

How can i made Carnot engine

Shift microoperations, Shift Microoperations Shift microoperation can b...

Shift Microoperations Shift microoperation can be used for serial transfer of the data. They are used generally with arithmetic, logic and other data-processing operations. The

Reading decision trees - artificial intelligence, Reading Decision Trees ...

Reading Decision Trees There is a link between decision tree representation and logical representations, which may be exploited to form it more easy  to understand and learned

Explain communications and synchronization, Communications Parallel t...

Communications Parallel tasks normally have to exchange data. There are various manners in which this can be achieved like over a network or through a shared memory bus. The

Computer network architecture, A protocol is a formal description of messag...

A protocol is a formal description of message formats and the rules two or more machines must follow to exchange those messages. Because TCP (transmission control protocol) and IP

Unification, Unification: As just above this we have said that the rul...

Unification: As just above this we have said that the rules of inference for propositional logic detailed in the last lecture can also be required in first-order logic. Moreov

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