Operating Systems Premium Lecture Notes (All Units) - Lavanya Edition

Operating Systems (All Units) Handwritten Premium Lecture Notes, Prepared by Lavanya. Specially for Engineering Candidates. Syllabus Covered based on Anna University B.E EEE Engineering Seventh Semester.

Syllabus :

OPERATING SYSTEM

UNIT-1 (pages: 23) :PROCESSES AND THREADS

UNIT-2 (pages: 20) : PROCESS SCHEDULING AND SYNCHRONIZATION

UNIT-3 (pages: 12) : STORAGE MANAGEMENT

UNIT-4 (pages: 5) : FILE SYSTEM

UNIT-5 (pages: 12) : INPUT OUTPUT SYSTEM

Content :

UNIT-1

PROCESSES AND THREADS

Operating system goal

Computer system components

1. Hardware
2. Operating system
3. Application programs
4. Users

Abstract view of system components

Operating system zoo

1. Main frame operating system
2. Server operating system
3. Multiprocessor operating system
4. Personal computing operating system
5. Real time operating system
6. Embedded operating
7. Smart card operating system

Operating system structure

System components

Causes managements

System calls

Types of system call

1. Process control
2. File managements
3. Device managements
4. Information maintenance
5. Communication

System program

1. File management
2. Status information
3. File manipulation
4. Programming language support
5. Program loading and execution
6. Communication

System structure

Responsibility of OS

Process state

Inter process communication

1. Send
2. Receive

Design characteristics of message system by IPC

Three combination of synchronization

Buffering

Message format

Threads

Types of threads

1. User thread
2. Kernel thread

Models of multi threadings

1. Many to one model
2. One to one model
3. Many to many model

Signal handling

UNIT-2

PROCESS SCHEDULING AND SYNCHRONIZATION

CPU scheduling

Sequence of CPU and I\O burst

Scheduling methods

Scheduling criteria

Scheduling algorithm

Algorithm evaluation

Multi process scheduling

OS concerns

Process interaction

Semphores

Dead locks

Types of resources

Methods of handling dead locks

1. Protocol
2. Detect and recover
3. Ignore the dead lock

Banker’s algorithm

1. Safety algorithm
2. Resources

Classic problems of synchronization

UNIT-3

STORAGE MANAGEMENT

Memory management

Types of address

1. Physical address
2. Locateable address
3. Absolute address

Introduction

Background

Function of main memory managements

Requiements of memory managements

Relocation

Logical organization

Address bindings

Compile time

Load time

Execution

Dynamic loading

Swapping

Bucking store

Swap time

Contiguous memory allocation

Fragmentation

1. Internal fragmentation
2. External fragmentation

Page fault

Process creation

Copy on write

Thrashing

UNIT-4

FILE SYSTEM

File

File attribute

Operation

File structure

File type

Access method

Directory structure

Operation performed on a directory

Types of directory

Single level directory

Tree structure directory

Protection

Types of access

Access control

Allocation methods

Free space managements

UNIT-5

INPUT OUTPUT SYSTEM

Categories

Difference between i\o devices

I/o hardware

Interface

Disk performance parameters

Rotational delay

Transfer time

Total capacity of disk

Disk scheduling

FCFS scheduling

Look scheduling

Swap space management

Swap space location