Computer Architecture

How to Leverage the CPU’s Micro-Op Cache for Faster Loops

Measuring, analyzing, and optimizing loops using Linux perf, Top-Down Microarchitectural Analysis, and the CPU’s micro-op cache

Aug 15 •

Abhinav Upadhyay

45:32

Big O vs Hardware: Better Complexity ≠ Better Performance

Why Your O(log n) Algorithm Might Lose to O(n)

Aug 3 •

Abhinav Upadhyay

x86 Assembly Exercise #1: Toy kill Program (Solution)

A step-by-step walkthrough of the toy kill program using raw Linux syscalls.

Jul 19 •

Abhinav Upadhyay

8:42

Understanding Registers and Data Movement in x86-64 Assembly

A hands-on guide to general-purpose registers and data movement in x86-64

Jul 16 •

Abhinav Upadhyay

Making System Calls in x86-64 Assembly

Watch now | Privilege levels, syscall conventions, and how assembly code talks to the Linux kernel

Jun 16 •

Abhinav Upadhyay

31:44

One Law to Rule Them All: The Iron Law of Software Performance

A systems-level reasoning model for understanding why optimizations succeed or fail.

Jun 8 •

Abhinav Upadhyay

Debugging X86-64 Assembly with GDB

Watch now (20 mins) | Learn how to inspect registers, step through instructions, and investigate crashes using GDB.

May 26 •

Abhinav Upadhyay

19:40

Building (and Breaking) Your First X86 Assembly Program

We build a minimal X86 assembly program, run it… and hit a crash. But that crash is exactly what makes this program worth writing.

May 16 •

Abhinav Upadhyay

The System-Level Foundation of Assembly

Tracing how the CPU, OS, and ELF format shape the structure of your assembly code

May 5 •

Abhinav Upadhyay

Binary Arithmetic and Bitwise Operations for Systems Programming

Understand how computers represent numbers and perform operations at the bit level before diving into assembly

Apr 12 •

Abhinav Upadhyay

Understanding Computer Organization from First Principles

A ground-up model of how computers execute code, starting from logic gates and ending at the instruction cycle.

Apr 5 •

Abhinav Upadhyay

Hardware-Aware Coding: CPU Architecture Concepts Every Developer Should Know

Write faster code by understanding how it flows through your CPU

Mar 21 •

Abhinav Upadhyay

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