CS4310 Project 02 - "Wait", don't "kill" it...

Team members: Thomas Pickering, Nhat Tran, Celine Mangahas

Purpose

Understand the structure of FreeNOS (API, system calls, traps).

“Git” ready.

Get debugging skills.

Task Description

Part 1: Git

• Follow this guide, and make your FreeNOS-1.0.3 Folder a git repo, make its remote repo (“origin”) a new repo in your GitHub account.
• Make and check out a branch named “wait”. You will be working on this branch for this project.
• Add GitHub user: “2404s21” as a collaborator.

Part 2: Write an application named “wait” in folder “FreeNOS-1.0.3\bin\wait”

• It should work similarly to the wait command that comes with Ubuntu. (In your terminal, do “man wait” to learn more.) It should be able to wait for a background process (e.g. “sleep 30 &”) to finish and return.
• It should follow the application code structure like the “sleep” command of FreeNOS.

Part 3: Record a 3-minute (approx..) screencast with your voice (facial image is optional but encouraged)

• Introduce yourselves;
• Demo kill a process or two;
• Show off your contribution to FreeNOS: what you did to get rid of the bug? What debugger did you use?

Link to the GitHub repository

GitHub repository

Link to the screencast video

Screencast Video

Notes

Screencast Software & Version: nVidia Geforce Experience (Shadowplay Tool) Version 3.23.0.74

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CS4310 Project 03 Prioritize It

Purpose

Understand process scheduling of FreeNOS.

Get hands-on with process priority scheduling implementation.

Task Description

Part 1: (20 pts)

• Add priority to the PCB class in FreeNOS. Work on a new branch called “priority” in your FreeNos repo. The (u8) PriorityLevel goes from 1 to 5 (low to high priority)

Part 2: (10 pts)

• Change the “ps” application to display priority level of processes when you do: # ps –l

Part 3: (20 pts)

• Write an application named “renice” in folder “FreeNOS\bin\renice”, which should work similarly to the “renice” command on Ubuntu. (“# man renice”) This directory and code within should follow the structure of “sleep” application. Example run: (after you implement the supporting functions in FreeNOS)

  # sleep 30 &
  
  # sleep 45 &
  
  # ps –l #suppose the output has PID 17 for “sleep 30”
  
  # renice –n 2 17 #tell Process 17 to be run at priority 2
  
  # ps –l # make sure the priority changes for “sleep 30”
  
  # # wait to see that “sleep 45” finish before “sleep 30”
  

Part 4: (30 pts)

• Add support in FreeNOS kernel and system libraries for priority-based scheduling. It can be a simple linear Ready Queue, or you can use the ML algorithm from Zybooks for 10 points in extra credit.

Part 5: (10 pts)

• Record a 3-minute (approx..) screencast with your voice (facial image is optional but encouraged) and upload it to a video streaming site like Youtube. The video should include: Introduce yourselves; Demo run your code; Each team member comment on your code: what did you do? Any challenges? How did you overcome them? Any new understanding or insights?

Part 6:(10 pts)

• Submit a README.md file, listing: Your full names;

The link to your GitHub repo

GitHub repository (you should also maintain a README.md in your GitHub repo, which is updated with information about features/branches added);

The link to your screencast video.

Screencast Video

CS4310 Project 04 - Let’s Kill It!

Team members: Thomas Pickering, Nhat Tran, Celine Mangahas

Purpose

Understand the physical and virtual memory management of FreeNOS.

Apply textbook concepts in maintaining a real product.

Get debugging skills.

Task Description

Part 1: Git

• Make and check out a branch named “kill”. You will be working on this branch for this project.
• Add GitHub user: “2404s21” as a collaborator.

Part 2: Write an application named “kill” in folder “FreeNOS-1.0.3\bin\kill”.

• It should work similarly to the kill command that comes with Ubuntu. (In your terminal, do “man kill” to learn more.) You only need to support positive PID and two signals: SIGKILL and SIGTERM.

           # sleep 30 &
  
           # ps       # suppose the pid for ‘sleep’ is 17
  
           # kill 17
  
           # ps       # ‘sleep’ is killed
  

• It should follow the application code structure like the “sleep” command of FreeNOS.

Part 3: Record a 3-minute (approx..) screencast with your voice (facial image is optional but encouraged)

• Introduce yourselves;
• Demo kill a process or two;
• Show off your contribution to FreeNOS: what you did to get rid of the bug? What debugger did you use?

Link to the GitHub repository

GitHub repository

Link to the screencast video

Screencast Video Video created with OBS Studio.

Notes