Transcript A1_Presentation4_Interprocess_Comparisons_Revised

Group 1
Members:
Wael Faheem
Hazem Morsy
Poramate Ongsakorn
Payal H Patel
Samatha Devi Malka
SMU CSE 8343
Professor:Dr.M.KHALIL.
Date:11-08-03
INTERPROCESS COMMUNICATION
IN A WINDOWS MULTIPROCESSOR
O.S VS SUN SOLARIS O.S
BY:
SAMATHA DEVI MALKA
Outline:
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Introduction
Definition of IPC
Types of IPC
Definition of UNIX/SUN SOLARIS O.S
IPC Mechanisms for UNIX
Definition of Windows O.S
IPC Mechanisms for Windows
Synchronization
Details of IPC Mechanisms
Message Queues
Shared Memory
Pipes
Conclusion
References
Thank you
Introduction:
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In order to make a coherent system, processes
usually have to pass information back and forth,
and that's where IPC comes in.
However, it turns out that the models of IPC
available are very similar, in both Windows
Multiprocessor and Sun Solaris though the
implementations differ greatly.
Definition of IPC:
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A set of programming interfaces that enables a
process to communicate data or information to
another process.
Mechanisms for IPC exist in the different layers
of the system, from Mach messaging in the
kernel to distributed notifications and Apple
events in the application environments.
Types of IPC:
IPC mechanisms include : pipes,
 named pipes,
 signals,
 message queueing,
 semaphores,
 shared memory,
 sockets,
 the Clipboard, and
 application services.
Outline:
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Introduction
Definition of IPC
Types of IPC
Definition of UNIX/SUN SOLARIS O.S
IPC Mechanisms for UNIX
Definition of Windows O.S
IPC Mechanisms for Windows
Synchronization
Details of IPC Mechanisms
Message Queues
Shared Memory
Pipes
Conclusion
References
Thank you
Definition of UNIX/SUN SOLARIS O.S
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UNIX: is a multiuser, multitasking operating
system that is widely used as the master control
program in workstations and especially servers.
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Solaris: Solaris is a multitasking,
multiprocessing operating system and
distributed computing environment for Sun's
SPARC computers from SunSoft. It provides an
enterprise-wide UNIX environment
IPC Mechanisms for UNIX:
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Shared memory, pipes, and message queues are
all suitable for processes running on a single
computer.
sockets are usually the chosen technique for
communicating across the network.
Outline:
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Introduction
Definition of IPC
Types of IPC
Definition of UNIX/SUN SOLARIS O.S
IPC Mechanisms for UNIX
Definition of Windows O.S
IPC Mechanisms for Windows
Synchronization
Details of IPC Mechanisms
Message Queues
Shared Memory
Pipes
Conclusion
References
Thank you
Definition of Windows O.S:
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A family of operating systems for personal
computers, Windows dominates the personal
computer world.
Windows provides a graphical user interface
(GUI), virtual memory management,
multitasking, and support for many peripheral
devices.
IPC Mechanisms for Windows:
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Shared memory, pipes, and events (equivalent
to signals).
The clipboard/Dynamic Data Exchange (DDE),
Component Object Model (COM), and send
message.
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Windows sockets and Message Queuing (also
known as MSMQ).
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Remote procedure call (RPC) and mailslots.
Synchronization:
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In serial data transmission, a method of
ensuring that the receiving end can recognize
characters in the order in which the transmitting
end sent them, and can know where one
character ends and the next begins.
Both UNIX and Windows have an extensive set of
process and thread synchronization techniques.
Both operating systems use semaphores, which
are synchronization primitives used to control
access to a resource that can support a limited
number of users.
Both UNIX and Windows also use mutex objects
to control mutually exclusive access to a resource.
Outline:
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Introduction
Definition of IPC
Types of IPC
Definition of UNIX/SUN SOLARIS O.S
IPC Mechanisms for UNIX
Definition of Windows O.S
IPC Mechanisms for Windows
Synchronization
Details of IPC Mechanisms
Message Queues
Shared Memory
Pipes
Conclusion
References
Thank you
Details of
IPC Mechanisms
Message Queues(MQs):
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In programming, message queueing is a method
by which process (or program instances) can
exchange or pass data using an interface to a
system-managed queue of messages.
MQs IN UNIX:
One application sends messages to the queue;
another application reads messages from the
queue.
The queues are memory based and are very fast
as a result.
Message queues were introduced in AT&T System V.2
UNIX.
MQs IN Windows:
Messaging system is called Message Queuing
(MSMQ).
Message Queuing provides guaranteed message
delivery, efficient routing, security, and prioritybased messaging.
In essence, a Message Queuing message is
guaranteed to be delivered, but there is no specific
guarantee about exactly when it will be received.
The operation is the same as on UNIX
Shared Memory:
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Hardware architecture in which multiple
processors operate independently but share the
same memory resources.
In computer programming, shared memory is a
method by which program process can exchange
data more quickly than by reading and writing
using the regular operating system services.
Shared memory IN UNIX:
The program must first call a function to get a
shared memory identifier, shm_id, for the
amount of shared memory. The identifier is
then used in calls to attach the shared memory
to the process.
Shared memory in UNIX can be done based on the
concept of file mapping.
Shared memory IN Windows:
Implementation of shared memory is based
entirely on the concept of file mapping.
As in the UNIX implementation, which uses an
identifier, Windows uses a handle identifier to
identify the memory that is mapped into the
process at the requested address.
Pipes:
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A pipe is a technique for passing information
from one program process to another. Unlike
other forms of interprocess communication
(IPC).
A pipe is usually a one-way communication only.
For two-way communication between processes,
two pipes can be set up, one for each direction.
Pipes in UNIX:
can be named or unnamed. They also have
separate read and write file descriptors, which
are created through a single function call.
Two unrelated processes can use named pipes to
communicate.
With unnamed pipes, a parent process that
must communicate with a child process creates
a pipe that the child process will inherit and
use.
Pipes in Windows:
can also be named or unnamed. A parent
process and a child process typically use
unnamed pipes to communicate.
The processes must create two unnamed pipes
for bidirectional communication
Two unrelated processes can use named pipes,
even across the network on different
computers.
Conclusion:
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Like most everything else, IPC is not portable
between Windows Multiprocessor OS and Sun
Solaris OS.
However, though the implementation details
differ greatly, the two systems do share certain
ways of thinking about IPC.
They try to cover the same functionality, and
almost any style of IPC you implement in one
can usually be replicated in the other.
References:
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[1] R.W. Stevens, Advanced Programming in the UNIX Environment,
Addison-Wesley (Books)
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[2] Robert Orfali and Dan Harkey, Client/Server Programming with OS/2
2.0, Van Nostrand Reinhold. (Books)
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[3] A short introduction to operating systems, Mark Burgess, October 3,
2001
http://www.iu.hio.no/%7Emark/os/os.html (URL).
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Definaitons: http://www.course.com/careers/glossary/operating.cfm
(URL)
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UNIX: http://www.course.com/careers/glossary/operating.cfm#unix
(URL)
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IPC: iroi.seu.edu.cn/books/ee_dic/whatis/ipc.htm
(URL)
Pipes: dictdie.net/pipes/
Any Questions ?
THANK YOU