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

State the list of protocols supported by the intranet, State the list of pr...

State the list of protocols supported by the Intranet The following is the list of protocols supported by the Intranet: ARP: Address resolution Protocol is used to resol

What is icmp, What is ICMP? ICMP is Internet Control Message Protocol. ...

What is ICMP? ICMP is Internet Control Message Protocol. It gives messaging and communication for protocols within the TCP/IP stacks. This is also the protocol that manages err

Analysis of the ethical issue, This ICT-related issue that has been raised ...

This ICT-related issue that has been raised in the contemporary media, and the article is required to be included as part of the essay: Undertake further research about this top

Distance-vector routing, Local information is immediate hop routing table a...

Local information is immediate hop routing table and distance from every switch. The switches regularly broadcast topology information i.e. distance, destination. Other switches mo

Routing protocol used in design a banking network, You have been asked to d...

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

Explain the meaning of negotiation, Explain the meaning of Negotiation ...

Explain the meaning of Negotiation Negotiation is process of getting both sides to agree on some values or parameters to be used during communication. Maximum packet size is on

Define ring topology, Q. Define Ring Topology?  Dedicated point-to-poi...

Q. Define Ring Topology?  Dedicated point-to-point arrangement to neighbours  Signal is conceded from device to device until it reaches destination  Every device functio

What is the attenuation, In communication weakening or loss of signal energ...

In communication weakening or loss of signal energy, typically caused by distance

Enable wireless security - ccna, Enable Wireless Security Step : Confi...

Enable Wireless Security Step : Configure Windows to use WEP authentication.  Navigate to the Network Connections page again and right-click the Wireless Network Connection

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