Operating Systems

Every step on this roadmap

5 stages · 10 articles · 3 visualizers · 13 scenes · 5 quizzes

1. STAGE 01Foundations

   What an OS is, why it exists, and the key abstractions it provides.

   1. ArticleOperating Systems: Processes, Memory & Scheduling
   2. SceneDeadlock: Two Friends, Two Chopsticks
   3. SceneDeadlock Fixes: Two Cooks, Three Ways Out
   4. SceneDeadlock: Four Conditions, Three Ways Out
   5. ScenePipes: What Happens When Nobody Is Reading
   6. ArticleProcesses & Threads: PCB, States & Context Switching
   7. SceneConcurrency vs Parallelism: One Core or Three
   8. QuizReadiness Check

2. STAGE 02Scheduling & Memory

   How the CPU is shared between programs and how memory is virtualised.

   1. ArticleCPU Scheduling: FCFS, SJF, Round Robin & MLFQ
   2. SceneTop 5 CPU Scheduling Algorithms
   3. ArticleMemory Management: Paging, TLB & Virtual Memory
   4. SceneVirtual Memory: One Address, Three Places to Look
   5. VisualizerFIFO Page Replacement
   6. VisualizerLRU Page Replacement
   7. VisualizerClock Page Replacement
   8. QuizReadiness Check

3. STAGE 03Concurrency & Storage

   Coordinating concurrent access and organising data on disk.

   1. ArticleSynchronisation: Mutex, Semaphores & Deadlocks
   2. SceneRace Condition vs Mutex
   3. SceneRace Condition: The Last Concert Ticket
   4. ArticleFile Systems: Inodes, Directories & Journaling
   5. QuizReadiness Check

4. STAGE 04System Interface

   How user programs talk to the kernel and communicate with each other.

   1. ArticleSystem Calls: Crossing from User Space into the Kernel
   2. SceneA System Call, Ring 3 to Ring 0
   3. ArticleInter-Process Communication: Pipes, Sockets & Shared Memory
   4. SceneThe Unbounded Queue Time Bomb, and Why You Cap the Line
   5. QuizReadiness Check

5. STAGE 05Advanced OS

   I/O subsystems, device drivers, and virtualisation technologies.

   1. ArticleI/O Systems: Buffering, DMA & Storage Scheduling
   2. SceneLatency Numbers Every Developer Should Know
   3. SceneBuffered Writes: When Your Data Is Really Saved
   4. ArticleVirtualization: Hypervisors, Containers & VMs
   5. QuizReadiness Check

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