OPERATING SYSTEMS LAB

(Common to CS/CD/CM/CR/CA/AI/CB/CN/CC/CU/CI/CG)

CourseCode	PCCSL407	CIEMarks	50
Teaching Hours/Week (L: T:P: R)	0:0:3:0	ESEMarks	50
Credits	2	ExamHours	2Hrs.30Min.
Pre requisites(ifany)	GYEST204	CourseType	Lab

Course Objectives:

1. To familiarize various Linux commands related to Operating systems.

2. To give practical experience for learners on implementing different functions of Operating systems such as process management, memory management, and disk management.

Expt. No.	Experiments
1	Familiarisation with basic Linux programming commands: ps,strace, gdb,strings, objdump, nm, file, od, xxd, time, fuser, top
2	Use/proc file system to gather basic information about your machine: (a) Number of CPUcores (b) Total memory and the fraction of free memory (c) Number of processes currently running. (d) Number of processes in the running and blocked states. (e) Number of processes forked since the last bootup. How do you compare this value with the one in (c) above? (f) The number of context switches performed since the last bootup for a particular process.
3	Write a simple program to print the system time and execute it. Then use the /proc file system to determine how long this program(in the strict sense,the corresponding process) ran in user and kernel modes.
4	Create a new process using a fork system call.Print the parent and child process IDs.Use the pstree command to find the process tree for the child process starting from the init

process.

Write a program to add two integers(received via the commandline)and compile it to an executable named “myadder”. Now write another program that creates a new process using a fork system call. Make the child process add two integers by replacing its image with the “myadder” image using execvp system call.

Create a new process using a fork system call. The child process should print the string “PCCSL407” and the parent process should print the string “Operating Systems Lab”. Use awaitsystem call to ensure that the output displayed is “PCCSL407 Operating Systems Lab”

Inter-processCommunication(https://www.linuxdoc.org/LDP/lpg/node7.html)

(a) Using Pipe – Evaluate the expression sqrt(b^2-4ac). The first process evaluates b^2. The second process evaluates 4ac and sends it to the first process which evaluates the final expression and displays it.

(b) UsingMessageQueue-The first process sends a string to the second

process.The second process reverses the received string and sends it back to the first process. The first process compares the original string and the reversed string received from the second one and then prints whether the string is a palindrome or not.

(c) UsingSharedMemory-The first process sends three strings to the second process. The second process concatenates them to a single string (with white space being inserted between the two individual strings)and sends it back to the first process.The first process prints the concatenated string in the flipped case,that is if the concatenated string is“HelloS4Students”, the final output should be“hELLOs4sTUDENTS”

Write a multi threaded program that calculates the mean, median, and standard deviation for a list of integers.This program should receive a series of integers on the commandline and will then create three separate worker threads. The first thread will determine the mean value,the second will determine the median and the third will calculate the standard deviation of the integers.The variables representing the mean, median, and standard deviation values will be stored globally.The worker threads will set these values,and the parent thread will output the values once the workers have exited.

Input a list of processes,their CPU bursttimes(integral values),arrival times,and priorities.Then simulate FCFS,SRTF,non-preemptive priority (a larger priority number

implies a higher priority),and RR(quantum=3units)scheduling algorithms on the

	process mix, determining which algorithm results in the minimum average waiting time (over all processes).
10	Use semaphores to solve the readers-writers problem with writers being given priority over readers.
11	Obtain a (deadlock-free) process mix and simulate the banker’s algorithm to determine a safe execution sequence.
12	Obtain a process mix and determine if the system is deadlocked.
13	Implement the deadlock-free semaphore-based solution for the dining philosopher’s problem.
14	Simulate the address translation in the paging scheme as follows: The program receives three command line arguments in the order ● size of the virtual address space(in megabytes) ● page size(in kilobytes) ● a virtual address(in decimal notation) The output should be the physical address corresponding to the virtual address in <frame number, offset> format. You may assume that the page table is implemented as an array indexed by page numbers. (NB: If the page table has no index for the page number determined from the virtual address, you may just declare a page table miss!)
15	Simulate the FIFO, LRU, and optimal page-replacement algorithms as follows: First, generate a random page-reference string where page numbers range from 0to9.Apply the random page-reference string to each algorithm, and record the number of page faults incurred by each algorithm. Assume that demand paging is used. The length of the reference string and the number of page frames(varying from 1to7)are to be received as command line arguments.
16	Simulate the SSTF, LOOK, and CSCAN disk-scheduling algorithms as follows: Your program will service a disk with 5,000 cylinders numbered 0 to 4,999. The program will generate a random series of 10cylinder requests and service them according to each of the algorithms listed earlier. The program will be passed the initial position of the disk head (as a parameter on the commandline) and will report the total number of head movements required by each algorithm.

Course Assessment Method(CIE: 50 marks, ESE: 50 marks)

Continuous Internal Evaluation Marks(CIE):

Attendance

Preparation/Pre-Lab Work experiments,

Viva and Timely completion of Lab Reports/Record

(Continuous Assessment)

Internal Examination

Total

EndSemesterExaminationMarks(ESE):

Procedure/

Preparatory work/Design/

Algorithm

Conductofexperiment/ Execution of work/ troubleshooting/ Programming

Resultwithvalid inference/

Qualityof Output

Viva voce

Record

Total

● Submission of Record:Students shall be allowed for the end semester examination only upon submitting the duly certified record.

● Endorsement by External Examiner:The external examiner shall endorse the record

CourseOutcomes(COs)

At the end of the course students should be able to:

CourseOutcome		Bloom’s Knowledge Level(KL)
CO1	Illustrate the use of various systems calls in Operating Systems.	K3
CO2	Implement process creation and inter-process communication in Operating Systems	K3
CO3	Compare the performance of various CPU scheduling algorithms	K4
CO4	Compare the performance of various disk scheduling algorithms	K4

Note:K1-Remember,K2-Understand,K3-Apply,K4-Analyse,K5-Evaluate,K6-Create

CO-PO Mapping(Mapping of Course Outcomes with Program Outcomes)

	PO1	PO2	PO3	PO4	PO5	PO6	PO7	PO8	PO9	PO10	PO11	PO12
CO1	3	3	3	3				3				3
CO2	3	3	3	3				3				3
CO3	3	3	3	3				3				3
CO4	3	3	3	3				3				3
CO5	3	3	3	3				3				3

1:Slight(Low),2:Moderate(Medium),3:Substantial(High),-:NoCorrelation

TextBooks
Sl.No	TitleoftheBook	NameoftheAuthor/s	Nameofthe Publisher	Edition andYear
1	OperatingSystems:ThreeEasy Pieces	AndreaArpaci- Dusseau,Remzi Arpaci-Dusseau	CreateSpace	1/e, 2018
2	LinuxKernelDevelopment	RobertLove	Pearson	3/e,2018
3	UnixNetworkProgramming- Volume 2: Interprocess Communications	RichardStevens	PrenticeHall	2/e,1999

Reference Books/Websites
Sl.No	Title of the Book	Name of the Author/s	Name of the Publisher	Edition and Year
1	The Design of the UNIX Operating System	Maurice J.Bach	Prentice Hall of India	1/e, 1994
2	The Little Book of Semaphores	Allen B.Downey	Green Tea Press	1/e,2016

Video Links(NPTEL,SWAYAM…)
Module No.	LinkID
1	https://archive.nptel.ac.in/courses/106/105/106105214/
2	https://www.youtube.com/playlist?list=PLDW872573QAb4bj0URobvQTD41IV6gRkx

Continuous Assessment (25 Marks)

1. Preparation and Pre-Lab Work (7 Marks)

Pre-Lab Assignments: Assessment of pre-lab assignments or quizzes that test understanding of the upcoming experiment.
Understanding of Theory: Evaluation based on students’ preparation and understanding of the theoretical background related to the experiments.

2. Conduct of Experiments (7 Marks)

Procedure and Execution: Adherence to correct procedures, accurate execution of experiments, and following safety protocols.
Skill Proficiency: Proficiency in handling equipment, accuracy in observations, and troubleshooting skills during experiments.
Teamwork: Collaboration and participation in group experiments.

3. Lab Reports and Record Keeping (6 Marks)

Quality of Reports: Clarity, completeness, and accuracy of lab reports. Proper documentation of experiments, data analysis, and conclusions.
Timely Submission: Adhering to deadlines for submitting lab reports or rough records and maintaining a well-organized fair record.

4. Viva Voce (5 Marks)

Oral Examination: Ability to explain the experiment, results, and underlying principles during the viva voce session.

Final Marks Averaging

The final marks for preparation, conduct of experiments, viva, and record are the average of all the specified experiments in the syllabus.

Evaluation Pattern for End Semester Examination (50 Marks)

1. Procedure / Preliminary Work / Design / Algorithm (10 Marks)

Procedure Understanding and Description: Clarity in explaining the procedure and understanding each step involved.
Preliminary Work and Planning: Thoroughness in planning and organizing materials/equipment.
Algorithm Development: Correctness and efficiency of the algorithm related to the experiment.
Creativity and Logic: Innovation and logical flow in algorithm or experimental design.

2. Conduct of Experiment / Execution of Work / Programming (15 Marks)

Setup and Execution: Proper setup and accurate execution of the experiment or programming task.

3. Result with Valid Inference / Quality of Output (10 Marks)

Accuracy of Results: Precision and correctness of the obtained results.
Analysis and Interpretation: Validity of inferences drawn from the experiment or quality of the program output.

4. Viva Voce (10 Marks)

Explanation Skills: Ability to explain the experiment, procedure, and results, and to answer related questions.
Conceptual Understanding: Proficiency in answering questions related to theoretical and practical aspects of the subject.

5. Record (5 Marks)

Completeness and Clarity: Completeness, clarity, and accuracy of the lab record submitted.

Search This Blog

Operating Systems Lab PCCSL407 Semester 4 KTU CS 2024 Scheme- Dr Binu V P