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

Describe about the term- network, Describe about the term- network If n...

Describe about the term- network If network tends to lose the packets, it is better to acknowledge each one of them separately, so the lost packets could be retransmitted. On t

TCP for live video, 1. What advantages and disadvantages does TCP have for ...

1. What advantages and disadvantages does TCP have for live video teleconferencing applications

Design a banking network, You have been asked to design a Banking Network w...

You have been asked to design a Banking Network with two primary types of locations.  Branches that will have 3 subnets, one /25 subnet one /26 subnet for ABMS and one /26 s

Financial services - fundamentals of networks , Financial Services Tod...

Financial Services Today   financial services are totally depended  on computer network. Application includes credit history searchers foreign exchange and  investment service

What are called transactions, The grouped SQL statements are known as Trans...

The grouped SQL statements are known as Transactions (or) A transaction is a collection of actions embused with ACID properties.

Show the error correction by hamming code, Q. Show the Error Correction by ...

Q. Show the Error Correction by Hamming Code? Hamming Code is able to be applied to data units of any length and uses the relationship between data and redundancy bits For i

Subnetting (EIGRP), #questiGE 1-A Objectives: • Consolidate EIGRP knowle...

#questiGE 1-A Objectives: • Consolidate EIGRP knowledge. • Introduce the Route Redistribution concept. • Introduce the EIGRP External Routes concept. • Introduce the Default Met

How to define a constant variable in java, How to define a constant variabl...

How to define a constant variable in Java? The variable should be declared as static and final. So only one copy of the variable exists for all instances of the class and the v

What are the two broad classes of middleware, Two broad classes of middlewa...

Two broad classes of middleware are a) General middleware b) Service-specific middleware.

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