Interprocess communication, Operating System

Assignment Help:

Now we consider the following questions: how can the parent process communicate with its child? Or how can children processes communicate with other children? The exact answer depends on the exact problem being treated, but in general we call the several different approaches to this question by the name of Interprocess Communication (IPC).

On possibility for IPC is to use sockets. This approach is based on explicit message passing, and has the advantage that processes can be distributed anywhere on the Internet, among several different machines. An application designed to use sockets can fairly easily be re-deployed as a multi-server application when its needs outgrow a single server.

Another possibility is the use of mmap, which is a hack, although a very common one. Mmap uses memory sharing as an indirect way of communicating. The way that this works is that all processes map the same ?le into a ?xed memory location. In this case, however, since we have objects being read fromandwritten to a sharedmemory region,wemust use some kind of process-level synchronization. Unfortunately, these synchronization procedures are in general much more expensive than the use of threads itself.

One can also use signals; in this case, processes can send and receive integer numbers associated with particular signal numbers. In order to be able to receive and treat these numbers, processes must ?rst set up signal handlers. This approach works best for rare events1. In general, signals are not very useful for parallel or concurrent programming.

The other possibility is the use of pipes. These are unidirectional communication channels which make it possible for the output of one program to be used as input to another one, just like in Unix (for example, when we use the pipe symbol, as in "ls j wc -l". The advantage of using pipes is that they are easy and fast.


Related Discussions:- Interprocess communication

Semantics for execution of rpcs, Q. Presume that a distributed system is su...

Q. Presume that a distributed system is susceptible to server failure. What mechanisms would be needed to guarantee the exactly once semantics for execution of RPCs? Ans

Computer, what is an operating system?

what is an operating system?

What is erd, What is ERD? Entity Relationship Diagram is the graphical ...

What is ERD? Entity Relationship Diagram is the graphical representation of the object relationship pair. It is mostly used in database applications.

Networking tidbits, There is a very small amount of networking background r...

There is a very small amount of networking background required for Project 2. In Project 2, we want our computer (or our "host") to request information over the Internet from a rem

Explain types of file allocation- linked list allocation, Linked list alloc...

Linked list allocation: At this time the blocks are stored using linked lists. The block size require not be the same. Thus internal fragmentation is avoided. Consider

Define dynamic linking, Define dynamic linking. Dynamic linking is same...

Define dynamic linking. Dynamic linking is same to dynamic loading, rather that loading being postponed unless execution time, linking is postponed. This feature is usually use

Determine the value to be loaded in relocation register, Refer a program wi...

Refer a program with a linked origin of 5000. Suppose the memory area allocated to it have the start address of 70000. Determine the value to be loaded in relocation register?

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