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

Which decision called socket base, IP plus port (IP on layer 3 and port on ...

IP plus port (IP on layer 3 and port on Layer 4 - In Encapsulation, socket base decision on Network Layer -Layer 3)

What are the basic lan topologies, What are the basic LAN topologies? ...

What are the basic LAN topologies? The three simple LAN topologies that are combined to shape any practical topology are called as basic LAN topologies. They are, Bus Topology

Metric translation takes place in redistributing routes, Why Does metric tr...

Why Does metric translation takes place in redistributing routes?

Explain about nonboundary-level masking, Q. Explain about Nonboundary-Level...

Q. Explain about Nonboundary-Level Masking? Nonboundary-Level Masking Bytes in the IP address that correspond to 255 in the mask will be repeated in the subnet addres

Parts count method calculation, M E T HOD OF CALCULATION It involves...

M E T HOD OF CALCULATION It involves counting the number of each part type and multiplying with the generic failure rate of each part. On summing up the product, we obtain t

Connectionless multiplexing and de multiplexing, Connectionless Multiplexi...

Connectionless Multiplexing  and De multiplexing Java program running in a host can create a UDP socket  with the  line Datagram's socket my socket =  new datagram's socket

Find the appropriate layer of the OSI or hub, • This device creates one big...

• This device creates one big collision domain and one large broadcast domain.

Subnetting ip addresses, Explain everything you can tell from the following...

Explain everything you can tell from the following: a. 00-01-00-01-13-FD-F4-C0-00-1E-33-92-CE-99 b. fe80::2c1e:18af:749b:91c5%12 c. 2002:8b64:6e3a::8b64:6e3a d. ::0

What is a management information base, What is a Management Information Bas...

What is a Management Information Base (MIB)? A Management Information Base is part of each SNMP-managed device. Every SNMP agent has the MIB database that having information ab

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