Harsha Assign

Harsha Assign - Introduction of the operating system and...

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Introduction: Like all the operating systems nachos supports most of the basic functionalities  of   the   operating   system,   and   was   developed   in   a   simple   object   oriented  programming language (C++). The following are the fuctionalities supported by  the operating system: Multi threading Multi processing File system Virtual memory Network Before we move on to these topics let us first analyze the directory structure of  the operating system. Directory Structure: Here is the complete directory structure for the Nachos operating sytem. The following is the brief description on each of the directories available: Bin: - contains the  executable  (i.e., ready to run) programs that must be available  in order to attain minimal functionality for the purposes of  booting  (i.e., starting)  and repairing a system. Lib: - This directory contains libraries that are used by various programs and  languages. Machine: - this directory encapsulates the files required by the operating system  to perform I/O and manage interrupts. bin lib machin filesys network ports thread s userpr ogs test 1
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File system: - the files in this directory help the operating system to keep track of  all the directories and files created by the users/processes. Network:  - this directory contains the  files that are used for the pupose of  networking i.e files related to sending messages via network or files which are  used to identify the system in the network. Ports: - this directory has the files which helps the users to install any new  applications on the operating system. Threads: - this directory contains the files which helps the operating system in  performaing multitasking and processing. Userprograms: - this directory encapsulates the files which hepls the operating  system to identify and keep track of the user programs executing. Test: - this directory contains the simple test programs which can be executed on  a Nachos operation system. Support for Multi Threading:   All the operating systems emerging these days are capable of multi processing.  The best way to attain this is using the concepts of multi threading. Nachos have  the capability of multi threading. The “threads” directory which is present in the  root directory of the Nachos encapsulates the files which are used to support  multi   threading.   Nochos   implements   some   of   the   fuctionalities   of   the  multithreaded OS. The “thread” class in the code helps the operating system to create the threads 
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Harsha Assign - Introduction of the operating system and...

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