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

Why a linked list is called a dynamic data structure, Why a linked list is ...

Why a linked list is called a dynamic data structure? What are the advantages of using linked list over arrays?    A linked list is known as a dynamic data structure because it

What is the advantage of running the vuser as thread, VuGen gives the facil...

VuGen gives the facility to use multithreading. This enables more Vusers to be run pergenerator. If the Vuser is run as a process, the similar driver program is loaded into memory

Develop website for my party venue- hall rental website, Project Descriptio...

Project Description: I want to prepare website for my party venue where i can post the photos and detail of place along with availability calendar. In future, I buy some more ha

Forall statement in fortran, Q. FORALL Statement in fortran? The FORALL...

Q. FORALL Statement in fortran? The FORALL statement permits for more common assignments to sections of an array. A FORALL statement has general form.   FORALL ( triplet, ..

In ldb what determines hierarchy of the tables, In LDB what determines hier...

In LDB what determines hierarchy of the tables? Structure

Elements of parallel computing and architecture, Elements of Parallel Compu...

Elements of Parallel Computing and Architecture  Parallel computing. Then we shall describe why we need parallel computing and what the heights of parallel processing are. We s

Programming , Adavantages and disadvantages of compilers and interpreters

Adavantages and disadvantages of compilers and interpreters

Is strategy - information system, IS strategy - Information System As ...

IS strategy - Information System As an operations manager when attempting to navigate your organisation through the information landscape and make best use of the available sy

What are primary keys and foreign keys, What are primary keys and foreign k...

What are primary keys and foreign keys? Primary keys are the unique identifiers for every row. They must have unique values and cannot be null. Due to their significance in rel

Dfd, dfd for big bazaar

dfd for big bazaar

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