Loosely coupled systems, Computer Engineering

Loosely Coupled Systems

These systems do not distribute the global memory because shared memory concept gives rise to the difficulty  of memory conflicts, which in turn slows down the implementation of instructions. Thus, to ease this problem, every processor in loosely coupled systems is having a great local memory (LM), which is not joint by any other processor. Therefore, such systems has multiple processors with their  set of I/O devices and own local memory. This set of memory, processor and I/O devices makes a computer system. Thus, these systems are also known as multi-computer systems. These computer systems are related together via message passing interconnection network by which processes communicate by transient messages to one another. Hence every computer system or node in multicomputer systems have a separate memory, they are called as distributed multicomputer systems. These are also name as loosely coupled systems, meaning thatnodes have little coupling among them as shown in Figure .

                                      1185_Loosely Coupled Systems.png

Since local memories are accessible to the attached processor only, here no processor can access remote memory. Thus, these systems are also calles as no-remote memory access (NORMA) systems. Meaning passing interconnection network gives connection to each node and inter-node communication with message depends on the kind of interconnection network. For illustration, interconnection network for a non-hierarchical system can be common bus.

Posted Date: 3/1/2013 7:12:39 AM | Location : United States







Related Discussions:- Loosely coupled systems, Assignment Help, Ask Question on Loosely coupled systems, Get Answer, Expert's Help, Loosely coupled systems Discussions

Write discussion on Loosely coupled systems
Your posts are moderated
Related Questions
The Concept of Parallel Execution and Concurrent Real world systems are obviously concurrent, and computer science is about modelling the actual world. Examples of actual worl

Q. Illustrate Clock signals of clock pulse generator? Synchronization in a sequential circuit is attained by a clock pulse generator that gives continuous clock pulse.  Figure

Arterial puncture - Specimen collection: Arterial puncture:    this requires special skill and usually performed only by physician. The preferred site is radial arter

State in brief about Polymorphism Class hierarchy is the deciding feature in the case of more than one implementation of properties. An object oriented program to compute the

Explain the difference between depth first and breadth first traversing techniques of a graph.   Depth-first search is dissimilar from Breadth-first search in the following way

Q. What is Switched Mode Power Supply? SMPS is the unit into which electric supply from the mains is connected to your PC and this supplies DC to internal circuits. It is more

Define pipeline speedup. S(m)=T(l)/T(m) Where T(m) is the execution time for some target workload on an m-stage pipeline. T(l) is the execution time for some workload an

Example of Unification: Let now here, assume instead that we had these two sentences as:  knows(john,X) → hates(john, X)  knows(jack, mary)  Thus here the predicate n

Zero address instruction format is used for  (A) RISC architecture.      (B) CISC architecture.  (C) Von-Neuman architecture.   (D) Stack-organized architecture.

Device Drivers in UNIX, MS-DOS and Windows System Though device drivers are in effect add-on modules they are however considered to be part of system because they are closely i