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

IP datagram, On a LAN where are IP Datagram transported?

On a LAN where are IP Datagram transported?

Compute shortest path, Compute the shortest path from t to all network node...

Compute the shortest path from t to all network nodes.

Determine about the security systems, Determine about the Security Systems ...

Determine about the Security Systems If the company intends to connect to the Internet, then it should pay great attention to the configuration of firewalls. Just as no one wo

Ieee report, http://cseweb.ucsd.edu/~savage/papers/CCS12Exploit.pdf

http://cseweb.ucsd.edu/~savage/papers/CCS12Exploit.pdf

What is stateful multi-layer inspection, What is Stateful Multi-Layer Inspe...

What is Stateful Multi-Layer Inspection (SMLI) They are considered as the third generation of firewall technology and usually combine the facilities of the above two. They are

What are the protocol support tools, What are the Protocol Support Tools ...

What are the Protocol Support Tools The Intranet should support the tools meant for providing various services on the Internet through the protocols. In addition to the convent

Explain communications channels, A communications channel is pathways over ...

A communications channel is pathways over which information can be communicate. It may be described by a physical wire that connects communicating devices, or by a radio, laser, or

Architecture of cisco ios software, Architecture of Cisco IOS software ...

Architecture of Cisco IOS software Cisco IOS might not  applications like ms word,multimedia softwares. It is mainly for switching data packet and concentrated on switching p

Packet cost - network layer and routing , Packet  Cost Both  distance ...

Packet  Cost Both  distance vector and link  state  routing  are lowest  algorithms. Tow factors  govern  how  cost is applied to packets  in determines  a route. Cost  is a

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