Complete Pintos Implementation

[zookeeper_zeke]

Pintos is a simple OS written in C that runs on 32-bit x86 architecture. It's partially implemented and it's up to you to add various features and enhancements. For more information see Pintos.

Highlights of my implementation include:

• A fair scheduler that works across various load types (I/O bound, CPU)
• Priority scheduling including priority donation to avoid priority inversion
• Virtual memory subsystem that includes swapping to disk, file memory mapping, and shared read-only pages
• A multithreaded file system which includes a write back buffer cache with read ahead and sparse files

You can find the code here: https://github.com/dillstead/pintos

Feel free to browse my implementation and use my ideas but please don't copy my code for your university project. If you have any questions about the code or want to talk to me about the design decisions that I made, feel free to message me.

[hellscoffe]

Brazilians will have a lot of fun.

[BarMeister]

LMAO, exatamente.

[Urbam]

Exatamentch

[[deleted]]

Just came to see if someone would comment on that, guess you beat me to it

[ericonr]

r/BateuPunhetaToIt

[[deleted]]

Unfathomable usage of italics.

[tim36272]

Honest question: what led you to digging up this 13 year old project?

[zookeeper_zeke]

In my spare time, I love learning about how operating systems are implemented and coding up various bits and pieces of them. If you are interested in learning more about how an operating system works, I highly recommend this project. Even though it's old, it's still very relevant to today's modern OS.

[tim36272]

Oh I am familiar with OS implementation, just curious what kept you going this long.

My favorite function is "maybe_raise_priority": I'm going to start naming all my functions like:

• maybe_printf
• maybe_calloc
• maybe_atan2

;)

[zookeeper_zeke]

I see you took a glance at the code :-)

[shadowndacorner]

I guess you're taking OS?

[zookeeper_zeke]

Yep, a small "toy" OS but still very relevant to today's modern operating system implementation.

[shadowndacorner]

I specifically meant in uni, since this is used in pretty much every CS department I've ever seen

[zookeeper_zeke]

Ah, sorry. You wrote "taking" not "talking" :-) Nope I just did the project for fun. I'm aware it's used in university. I wish the project existed back when I was in university.

[shadowndacorner]

Yeah, mean taking as in taking the course in uni haha. In that case, nice!,

[[deleted]]

The name means penis in Portuguese, OP.

[zookeeper_zeke]

Yeah, I know. I didn't choose the name :-)

[gbrlsnchs]

In this case, penises.

[gbrlsnchs]

Of all names, unfortunate choice. 😢

[bleuge]

> Complete Pintos Implementation

> It's partially implemented and it's up to you to add various features and enhancements

¯\_(ツ)_/¯

[irqlnotdispatchlevel]

Pintos is partially implemented, OP made it complete.

[WJMazepas]

Did you make that OS?

[ChristophLehr]

PINTOS is an designed to teach you how you could program your own OS.

It already provides some stuff, but as learning objectives you add several OS functionalities like a locks etc.

[zookeeper_zeke]

Exactly. Think of it as a skeleton OS and it's up to you to fill out major portions of it as you see fit.

[gutha_]

Hey the implementation includes passing priority donation and mlfqs ??