# remzi-arpacidusseau/ostep-code

Code from various chapters in OSTEP (http://www.ostep.org)

Repository: https://github.com/remzi-arpacidusseau/ostep-code
Canonical: https://ross.abutalabs.com/products/ostep-code
Language: C
License Family: other
Last push: 2023-11-09T20:49:36+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3110, "days_push": 1028, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4373, forks 1592 (observed 2026-08-28T04:08:46.835994+00:00)

## What it is
Companion C code examples for the free Operating Systems: Three Easy Pieces (OSTEP) textbook, organized by chapter. It covers CPU virtualization and scheduling, memory virtualization and paging, concurrency with threads and locks, and persistence including file systems and distributed systems.

## Use cases
- learn operating systems concepts with runnable C examples
- study thread synchronization with locks, condition variables, and semaphores
- understand how paging, segmentation, and TLBs work in practice
- explore CPU scheduling algorithms like MLFQ and lottery scheduling
- see file system implementation examples like FFS, LFS, and journaling
- accompany self-study or a university OS course using OSTEP

## When to choose
- you are reading OSTEP and want the book's code samples
- you want small, self-contained C programs illustrating OS concepts
- you are teaching an operating systems course and need example code

## When to avoid
- you need a production-ready OS library or framework
- you want a complete operating system or kernel to run
- you need licensed, maintained software - the repo has no license

## Facets
- artifact type: learning-resource
- maturity: stable
- function: developer-tools, concurrency, file-system
- domain: operating-systems, education, tutorials
- platform: cross-platform, c
- tags: operating-systems, textbook-code, ostep, c-examples, threads, virtual-memory, scheduling, file-systems, scheduler, linux, macos

## Member repositories
- remzi-arpacidusseau/ostep-code (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:46.835994+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:21:21.174799+00:00, confidence not recorded.
  - readme: https://github.com/remzi-arpacidusseau/ostep-code (fetched 2026-08-28T04:08:46.835994+00:00, sha d68b697e689a)
- Data as of 2026-08-30T08:39:29.467469+00:00.