How Big Is a Physical Address?

A short aside from the virtual memory series on physical address size, why it differs from virtual address size, and why different CPUs expose different…

Jun 22 • Abhinav Upadhyay

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10:29

What Does a Page Table Entry Actually Store?

Watch now | Learn about the page-level metadata that is stored in the page table and how is that used by the hardware during memory access

Jun 21 • Abhinav Upadhyay

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28:30

Page Tables from First Principles

Watch now | Constructing page tables from first principle as a way to store virtual-to-physical address mappings

Jun 16 • Abhinav Upadhyay

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49:43

Understanding a Process’s Address Space Layout

In this video, we look at how a process’s virtual address space is laid out: code, data, heap, stack, shared libraries, mmap regions, and more.

Jun 6 • Abhinav Upadhyay

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22:12

Why Git Has a Variable Named false_but_the_compiler_does_not_know_it

A small C trick that keeps Clang from flagging valid code as unreachable

Jun 3 • Abhinav Upadhyay

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May 2026

How Large Is the Virtual Address Space?

Watch now | How large is a process’s virtual address space, why is it split between user space and the kernel, and what are canonical virtual addresses?

May 31 • Abhinav Upadhyay

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25:15

Why do we need virtual memory?

Understanding virtual memory from first principles

May 24 • Abhinav Upadhyay

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17:34

Virtual Memory From First Principles

A practical guide to page faults, page tables, TLBs, NUMA topology, Linux internals, and performance in data-intensive systems.

May 10 • Abhinav Upadhyay

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December 2025

How PyTorch Generates Random Numbers in Parallel on the GPU

A deep dive into Philox and counter-based RNGs

Dec 18, 2025 • Abhinav Upadhyay

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November 2025

x86 Addressing Modes, Part 1 — Immediate and Direct Access

The foundations of memory access: static allocation, addressing modes, and the first steps toward low-level thinking.

Nov 12, 2025 • Abhinav Upadhyay

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October 2025

A Systems Engineer’s Guide to Benchmarking with RDTSC

A deep dive into rdtsc, instruction stream serialization, and memory fences for precise cycle-level performance measurement.

Oct 23, 2025 • Abhinav Upadhyay

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My Top 5 Favourite Features in Python 3.14

Exploring the concurrency, debugging, and performance upgrades that make Python 3.14 special.

Oct 11, 2025 • Abhinav Upadhyay

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