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

Write a .net web service program, Question: (a) Give three typical use...

Question: (a) Give three typical uses of Web Services. (b) Describe the term WebService Behavior and list its advantages. (c) Explain how Proxy classes are used to acc

What are the input devices, What are the Input devices Various devices ...

What are the Input devices Various devices are available for data input on graphics workstations. Most systems have a keyboard and one or more additional devices specially desi

What is accumulator register, Q. What is Accumulator Register? Accumula...

Q. What is Accumulator Register? Accumulator Register (AC):  This register is used to store data temporarily for computation by Arithmetic and logic unit (ALU).  AC generally c

Temporary registers w and z, Why the temporary registers W and Z are named ...

Why the temporary registers W and Z are named so I mean we start from A,B,C,D,E then H and L coz H stands for higher bit nd L for lower bit of the address pointed by memory pointer

What is a kernel shell, A shell is a program that presents an interface to ...

A shell is a program that presents an interface to several operating system functions and services. The shell is so called because it is an outer layer of interface among the user

What is software and hardware interrupt, What is Software and hardware inte...

What is Software and hardware interrupt The software interrupts are program instructions. These instructions are inserted at desired location in a program. A program formed int

What is meant by latch, Latch is a D- type flip-flop used as a temporary st...

Latch is a D- type flip-flop used as a temporary storage device controlled by a timing signal, which can kept 0 or 1. The primary function of a Latch is data storage. It is used in

Bubbling the pipeline - computer architecture, Bubbling the Pipeline: B...

Bubbling the Pipeline: Bubbling the pipeline (also known as a pipeline break or pipeline stall) is a technique for preventing, structural, data and branch hazards from taking p

How do you create special files like named pipes, How do you create special...

How do you create special files like named pipes and device files? The system call method forms special files in the following sequence. Kernel assigns new inode,

Explain macro definition and call, Explain Macro definition and call. ...

Explain Macro definition and call. Macro: The assembly language programming frequently finds this necessary to repeat certain piece of code several times during the course of

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