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

Dbms, documentation for dbms report

documentation for dbms report

What is an identification method, An identification method notifies Robot h...

An identification method notifies Robot how to recognize the values to compare during record and playback.

Program level, Program Level This is usually the dependability of the o...

Program Level This is usually the dependability of the operating system, which runs processes simultaneously. Different programs are evidently independent of each other. So par

An example of load-store optimization using expression trees, Give LOAD-STO...

Give LOAD-STORE optimization based on expression trees for the expression (A+B)/(C-D). LOAD-STORE optimization based on expression trees for the expression (A+B)/(C-D) is given

Characteristics of the id process, The following is taken from the first ed...

The following is taken from the first edition of the Set Book. We have included this because we find these characteristics helpful. We will refer to them later. In addition to t

Boolean algebra, Prove the following Boolean identities using the laws of B...

Prove the following Boolean identities using the laws of Boolean algebra (A + B)(A  + C) = A + BC Ans. (A+B)(A+C)=A+BC LHS AA+AC+AB+BC=A+AC+AB+BC OR  A((C+1)+A(B+1))+BC

Differentiate between hardware and software, Differentiate between Hardware...

Differentiate between Hardware and Software Another classification is software vs. hardware. Hardware is the collection of physical components, like chips, wires, PCBs, connect

What are threads, What are threads? A thread, sometimes termed as a lig...

What are threads? A thread, sometimes termed as a lightweight process (LWP), is a fundamental unit of CPU utilization; this comprises a thread ID a register set and a stack and

Common problem with hill climbing, Common problem with Hill climbing: ...

Common problem with Hill climbing: An alternative way of justifying the problem is that the states are boards with 8 queens already on them, so an action is a movement of one

Explain the fixed logic versus programmable logic, Explain the Fixed Logic ...

Explain the Fixed Logic Versus Programmable Logic? The Logic devices can be classified into two broad categories - fixed and programmable. The same as the name suggests, the ci

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