I write about how computers work underneath the abstractions: compilers, operating systems, memory, performance, and low-level programming.
| Platform |  | Pricing | Freemium | Publishes | Weekly |
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| Issues | 121 | Founded | 3 years ago | Last Issue | 16 days ago |
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blog.codingconfessions.comLatest Issues
How and Why fork() Uses Copy-on-Write
In this video, we look at why fork() needs copy-on-write, how it works inside the kernel, and a memory usage problem that Instagram encountered with Python.
In the last video, we learned about copy-on-write (CoW) and understood its mechani...
How Copy-on-Write Works with Memory-Mapped Files
Let’s step inside the kernel and understand how it implements copy-on-write and what are its implications for the performance of user-space systems
In the last video, we discussed demand paging. Now, let’s move towards an even more interes...
Demand Paging in Action: mmap, Page Faults, and RSS
Learn how to inspect a process’s virtual memory, use mmap to allocate pages, and observe page faults and physical memory allocation as they happen
In the previous video in our virtual memory series, we discussed demand paging. But that was...
Demand Paging: What Happens When Linux Handles a Page Fault
Understand what happens when you allocate memory versus when you actually access it, what a VMA is, and how the Linux kernel uses VMAs to handle page faults.
Welcome back to the video series on virtual memory based on my article on the sam...
x86 Addressing Modes, Part 2: Indirect, Indexed, and Offset-based Modes
In this final part on addressing modes, we learn about indirect, indexed and offset-based addressing modes along with some interesting examples and exercises.
Welcome back to our series on x86 assembly programming. If you are new, you can...
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Authors
The writers behind this newsletter.
I'm a software engineer obsessed with understanding how computers work. I write about Python internals, assembly, operating systems, performance engineering, and the machinery that powers modern software.
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