02 — Concepts

Concepts

Deep explorations of operating systems, memory, CPU architecture, and everything that makes software work below the abstraction layer.

📌 Pinned
pinned meta

My Setup & Environment

The machine, editor, terminal, and workflow behind everything in this lab.

Memory
concept

Virtual Memory

Paging, TLBs, page faults, address translation

 concept

Memory Allocators

Heap, arena, slab, buddy allocators

 concept

Cache Coherence

MESI, write policies, cache hierarchy
CPU & Execution
concept

CPU Scheduling

Preemptive scheduling, context switches, process states

 concept

Interrupts & IDT

Hardware interrupts, IRQs, IDT structure

 concept

Privilege Levels

Ring 0-3, protection, syscall mechanism
Formats & ABIs
concept

ELF Format

ELF sections, program headers, symbol tables

 concept

System Calls

Syscall interface, Linux ABI, trapping

 concept

Process Management

fork, exec, wait, process groups
Storage & I/O
concept

File Systems

inodes, ext4 internals, journaling

 concept

I/O Models

blocking, non-blocking, io_uring, epoll