The concept of thread-parallel computing, Computer Engineering

Assignment Help:

The Concept of Thread

Thread is a chronological flow of control within a process. A process can include one or more threads. Threads have their own register values and program counter, but they are split the memory space and other resources of the procedure. Each process always starts with a single thread. Through the implementation of other threads may be produced as and when necessary. Like processes, each thread has an implementation state (ready, running, terminated or blocked). A thread has entrance to the memory address space and resources of its process. Threads have related life cycles as the processes do. A single processor system can maintain concurrency by switching implementation among two or more threads. A multi-processor system can hold parallel concurrency by executing a separate thread on each processor. There are three basic process in concurrent programming languages for terminating and creating threads:

Unsynchronised creation and termination:  In this method threads are terminated and created using library functions such as, START_PROCESS, CREATE_THREAD, CREATE_PROCESS and START_THREAD. As a effect of these function calls a new process or thread is produced and starts consecutively independent of its parents.

Unsynchronised creation and synchronized termination:  This method uses two instructions: JOIN and FORK. The FORK instruction creates a new thread or process. When the parent needs the child's(thread or process) result, it calls JOIN instruction. At this junction two threads (processes) are synchronised.

Synchronised creation and termination:  The most commonly system construct to implement synchronization is

COBEGIN...COEND. The threads among the COBEGIN...COEND construct are executed in similar. The termination of parent-child is suspended until all child threads are ended.

We can think of a thread as basically a inconsequential process. However, threads present some advantages over processes. The advantages of this are:

i) It takes very less time to terminate and create a new thread than to Terminate and Create a process. The reason being that a newly terminate thread uses the current process address space.

ii) It obtains less time to switch between two threads within the similar process, partly because the recently created thread uses the current process address space.

iii) Less communication overheads -- communicating between the threads of one process is easy because the threads share among former entities the address space. So, data produced by one thread is directly available to all the other threads.


Related Discussions:- The concept of thread-parallel computing

Define protocol, Define Protocol. It is a set of rules that are followe...

Define Protocol. It is a set of rules that are followed by interconnecting computers and terminals to make sure the orderly transfer of information

Show select tag and pull down lists, The next type of input is a Pull Down ...

The next type of input is a Pull Down List. With this type you have to employ in place of and it also has a closing tag. This control is used when we have a

Define compilers with high level programming language, Define Compilers wit...

Define Compilers with High Level Programming Language? All high-level programming language (except strictly interpretive languages) comes with a compiler. Effectively the compi

What does the term entrepreneurship mean, 1) What does the term entrepreneu...

1) What does the term entrepreneurship mean to you?  What are some basic characteristics of entrepreneurs? 2) What is e-commerce?  Why are the Internet economy and e-commerce he

Explain yet another compiler-compiler, Explain Yet another Compiler-Compile...

Explain Yet another Compiler-Compiler. YACC uses for "Yet another Compiler-Compiler": Computer program input usually has some structure; actually, all computer programs which

What is data movement, Data movement instructions shift data from one locat...

Data movement instructions shift data from one location to another. The source and destination locations are verified by the addressing modes, and can be registers or memory. Many

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

Example on hamming error correcting code, Q. Example on hamming error corre...

Q. Example on hamming error correcting code? For illustration a 4-bit matching word can stand for 2 4 =16 values that range from 0 to 15 as: 0000, 0001, 0010, 0011, 0100, 01

Explain the architecture of ss7, Explain the architecture of SS7 . A ...

Explain the architecture of SS7 . A block schematic diagram of the CCITT no. 7 signaling system is demonstrated in figure. Signal messages are passed by the central proces

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