Docsity
Docsity
Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity

Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan

Guidelines and tips
Guidelines and tips
Sell on Docsity
Sell on Docsity
Docsity AI
Docsity AI
Log inSign up

Prepare for your exams

Study with the several resources on Docsity

Find documents

Prepare for your exams with the study notes shared by other students like you on Docsity

Search for your university

Find the specific documents for your university's exams

Docsity AINEW

Summarize your documents, ask them questions, convert them into quizzes and concept maps

Explore questions

Clear up your doubts by reading the answers to questions asked by your fellow students

Earn points to download

Earn points by helping other students or get them with a premium plan

Share documents
download point icon20 Points

For each uploaded document

Answer questions
download point icon5 Points

For each given answer (max 1 per day)

All the ways to get free points
Get points immediately

Choose a premium plan with all the points you need

Study Opportunities

Choose your next study program

Get in touch with the best universities in the world. Search through thousands of universities and official partners

Community

Ask the community

Ask the community for help and clear up your study doubts

Free resources

Our save-the-student-ebooks!

Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors

CS 475 Assignment 1: Threads and Processes Experiments, Assignments of Computer Science

George Mason University (GMU)Computer Science

The instructions for assignment 1 of the cs 475: concurrent & distributed software systems course at george mason university. The assignment includes three experiments comparing thread and process creation times, processes vs threads behavior, and the lost update problem in shared variables. Students are required to compile and execute the provided programs and analyze the results.

Typology: Assignments

Pre 2010

Uploaded on 02/12/2009

koofers-user-emh
koofers-user-emh 🇺🇸

10 documents

1 / 1

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
GEORGE MASON UNIVERSITY
DEPARTMENT OF COMPUTER SCIENCE
CS 475 – Concurrent & Distributed Software Systems
Spring 2003
Assignment 1: DUE Feb 10
Experiment 1. Thread and Process Creation Study the programs thr_create.c and fork.c. Com-
pile and execute the programs. These programs measure the average time to create a thread using
thr_create and to create a process using fork. What do you conclude from this experiment?
Briefly describe the reasons for the difference in timings.
Experiment 2. Processes vs Threads Study the two programs thr_shared.c and proc_shared.c.
Compile and execute the programs. These programs are identical except that one uses threads and
the other uses processes. What do you conclude from this experiment? Explain the reason for the
difference in behavior.
Experiment 3: The Lost Update Problem Study the program shared_data.c. Compile and execute
it. The main thread and the child thread are both updating (i.e., modifying) the shared variable
shared_number. Is the program behaving “correctly”? What do you conclude from this experi-
ment?
NOTES 1. All these programs are available from the web page with URL
http://cs.gmu.edu/˜setia/cs475/assignments/assign1. These programs have
been tested on Solaris and Linux platforms.
2. Read the README file in the directory for directions on how to compile and link the programs
3. The Useful Links page on the class home page has links to web sites where documentation on
Pthreads (including the Solaris Multithreaded Programming Guide) is available.
1

Partial preview of the text

Download CS 475 Assignment 1: Threads and Processes Experiments and more Assignments Computer Science in PDF only on Docsity!

GEORGE MASON UNIVERSITY

DEPARTMENT OF COMPUTER SCIENCE

CS 475 – Concurrent & Distributed Software Systems

Spring 2003

Assignment 1: DUE Feb 10

Experiment 1. Thread and Process Creation Study the programs thr_create.c and fork.c. Com- pile and execute the programs. These programs measure the average time to create a thread using thr_create and to create a process using fork. What do you conclude from this experiment? Briefly describe the reasons for the difference in timings.

Experiment 2. Processes vs Threads Study the two programs thr_shared.c and proc_shared.c. Compile and execute the programs. These programs are identical except that one uses threads and the other uses processes. What do you conclude from this experiment? Explain the reason for the difference in behavior.

Experiment 3: The Lost Update Problem Study the program shared_data.c. Compile and execute it. The main thread and the child thread are both updating (i.e., modifying) the shared variable shared_number. Is the program behaving “correctly”? What do you conclude from this experi- ment?

NOTES 1. All these programs are available from the web page with URL http://cs.gmu.edu/˜setia/cs475/assignments/assign1. These programs have been tested on Solaris and Linux platforms.

  1. Read the README file in the directory for directions on how to compile and link the programs
  2. The Useful Links page on the class home page has links to web sites where documentation on Pthreads (including the Solaris Multithreaded Programming Guide) is available.