Merits of message passage-shared memory, Computer Networking

Assignment Help:
  • Gives excellent low-level control of parallelism;
  • Portable;
  • Minimal overhead in data distribution and parallel synchronisation; and
  • It is less error prone.

Drawbacks

Message-passing code generally needs more software overhead than parallel shared-memory code.

Shared Memory

In shared memory approach, more focus is on the control parallelism in its place of data parallelism. In this model, many processes run independently on different processors, but they share a common address space accessible to all as shown in Figure.

1238_Shared memory.png

                                                                              Shared memory

The processors communicate with one another by one processor reading data into a location in memory and another processor writing the data. Any modification in a memory location effected by one processor is visible to all other processors. As shared data can be accessed by more than one process at the similar time, some control mechanism such as semaphores / locks should be devised to make sure mutual exclusion. This model is often referred to as SMP (Symmetric Multi Processors), named so because a common symmetric implementation is used for several processors of the similar type to access the same shared memory.  A number of multi-processor systems executes a shared-memory programming model; examples includes: SGI Power Onyx/ Origin 2000; NEC SX-5, Hewlett-Packard V2600/HyperPlex; SUN HPC 10000 400 MHz; DELL PowerEdge8450.


Related Discussions:- Merits of message passage-shared memory

Modern computer , modern technology in world of 21 century

modern technology in world of 21 century

Agent management system, QUESTION (a) Figure 3 below shows a reference ...

QUESTION (a) Figure 3 below shows a reference model of the Foundations of Intelligent Physical Agents (FIPA). Explain the roles of the following components (i) Agent platfor

What is boundary level masking, Q. What is Boundary Level Masking? ...

Q. What is Boundary Level Masking? If mask numbers are either 255 or 0: Bytes in the IP address that correspond to 255 in the mask will be repeated in the subnet ma

What is the virtual path, Along any transmission path from a given source t...

Along any transmission path from a given source to a given destination, a group of virtual circuits can be grouped together into what is known as path.

What is data encapsulation, What is data encapsulation? Data encapsulat...

What is data encapsulation? Data encapsulation is the method of breaking down information into smaller manageable chunks before it is transferred across the network. It is also

What is oltp, What is OLTP? In the transaction server, the client compo...

What is OLTP? In the transaction server, the client component usually contains GUI and the server components usually having of SQL transactions against a database. These applic

What is the catalogue intranet, What is the Catalogue Intranet Intra...

What is the Catalogue Intranet Intranets of this type are often more accurately described as Extranets. They are designed to give access to a large catalogue of information,

Classification of Wireless Networks, I need to know what comes under this t...

I need to know what comes under this topic...I need to give a presentation speech for 10 minutes duration.

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