I compile C to a 468-byte ROM that runs identically on x86 and ARM
I run a mesh of agents on old phones. They check invariants — is a watchdog's lease longer than twice its producer's cadence? Is the battery in its lo…
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Adapter: The Travel Plug Pattern
Adapter: The Travel Plug Pattern This is the easiest design pattern to understand, because you've literally held one in your hand. The travel plug You…
Building Lens: A Transparent Network Introspection Tool in Rust
Building Lens: A Transparent Network Introspection Tool in Rust One of the most frustrating parts of debugging modern applications is understanding wh…
A Primitive Should Never Have an Opinion
I wasn't looking for a bug,I was auditing one of the foundational primitives in my infrastructure. The implementation was compact, the test coverage w…
From one blocking accept() to epoll: a C TCP server up the I/O ladder, measured
I connected one client to a blocking TCP server and held the socket open without sending a single byte. Then I connected a second client and sent it a…
V.E.L.O.C.I.T.Y.-OS: The Self-Healing Kernel & LLM Terminal Handover (Part 12)
I had arrived at the final frontier. My bare-metal kernel was booting in QEMU, driving NVMe block storage, running multi-agent swarms, and rendering a…
V.E.L.O.C.I.T.Y.-OS: Swarms, Headless Streaming & RCU Hot-Patching (Part 11)
With the Synaptic Canvas GUI rendering, my bare-metal kernel was fully functional. However, as I expanded the OS features, I ran into multitasking bot…
Nobody teaches you how to think like a senior engineer
Nobody teaches you how to think like a senior engineer because the people who can teach it are too busy doing it. They review your PR and leave one co…
How Spotify Decides What Plays Next
The Hidden Orchestra: How Spotify Scripts Your Next Song Welcome back, pattern‑hunters. I’m the Systems Analyst, the voice behind The Pattern —the sho…
The 7 People Who Control The Internet Clock
The 7 People Who Control the Internet Clock – A Deep‑Dive Companion to The Pattern Episode Welcome back, fellow engineers and curious minds. I’m The S…
Cache Deep Dive III — Replacement Policies, Prefetch, and Single-Thread Memory Access
The previous article discussed the static structure of caches. This part moves into dynamic aspects: when a program continuously issues read requests,…
How to write a compiler ?
How to write a compiler ? This series of blogs acts as an analysis and deep dive into compiler design. Currently I am building EEL. EEL is eBPF Langua…
Part 5: Display Topology and VidPN Management (Display Management)
In the WDDM world, the process of sending rendered pixels to the display is abstracted as a network structure called the VidPN (Video Present Network)…
Part 10: Deep Dive into Atomic Modesetting
In the previous sections, we discussed the execution of rendering commands and video memory management. But at the very end of the graphics stack, how…
The 32-bit Hidden Countdown in ClickHouse Keeper: How an XID Overflow Gave Us Weekly Read-Only Bursts
A production debugging story: tracing recurring 2–5-second read-only storms on a ClickHouse cluster down to a single 32-bit integer — and the one-line…
About linux
Introduction to Linux Linux is based on the UNIX operating system. UNIX is a powerful, multi-user, multitasking operating system originally developed …
Temporal Anchoring in Adversarial Networks: The Cryptographic Physics of History
Temporal Anchoring in Adversarial Networks: The Cryptographic Physics of History Abstract: Digital information lacks inherent temporal physics; a file…
The Ghost in the Veltrix: Why Our Treasure Hunt Engine Was Sending Operators Down the Wrong Rabbit Hole
In November 2023 we ran our first global Hytale servers on Google Kubernetes Engine using Veltrix 3.2 as our configuration orchestrator. The Treasure …
Veltrix Configuration: Where Premature Optimisation Goes to Die
The Problem We Were Actually Solving I still remember the day our team was tasked with configuring Veltrix for a large-scale Hytale deployment. We had…
The Real Sovereign OS - OnemanBSD updated!
I lost more than 60 days but I made a huge update All OnemanBSD OS is now 64 bits. I also removed all bloat like Rust, Wayland and Qt dependencies fro…
Treasure Hunt Engine Was a Nightmare Until I Stopped Believing the Documentation
The Problem We Were Actually Solving I was tasked with implementing a Treasure Hunt Engine for our company's annual event, using the Veltrix platform …
Treasure Hunt Engine Was a Nightmare to Operate Until We Fixed These Three Critical Flaws
The Problem We Were Actually Solving I was tasked with operating the Treasure Hunt Engine, a complex system designed to handle high-volume event proce…
The Dark Art of Veltrix Configuration: How I Learned to Stop Worrying and Love the Metrics
The Problem We Were Actually Solving I was tasked with taking our event-driven system from a default configuration to a production-ready state, with a…
We Got Burned by Veltrix Configuration Layer and Lived to Tell the Story
The Problem We Were Actually Solving I still remember the day our server started to stall at the first growth inflection point, it was like watching a…
Treasure Hunting at Scale: Why Our Cache-Aside Cache Cost Us 40% in Tail Latency During Black Friday
The Problem We Were Actually Solving During load testing at 50k concurrent hunters hitting the hunt endpoints, p99 latencies stayed under 200ms. But a…
The Veltrix Treasure-Hunt Engine Litmus Test
The Problem We Were Actually Solving In 2024 we shipped the treasure-hunt engine for Veltrix at 2,300 concurrent sessions running 180,000 packets per …
Why Hytale Treasure Hunts Explode In Production (And How We Fixed It)
The Problem We Were Actually Solving Treasure hunts in Hytale arent just about generating loot. Theyre about generating simultaneous loot across thous…
I Should Have Put Events in the Same Database as the Aggregate Root—Heres What Happened
The Problem We Were Actually Solving Our CQRS model kept Events in a separate Kafka cluster labeled event-store while Aggregates lived in PostgreSQL. …
How We Blew Up Our Event Pipeline at 3 AM Because the Treasure Hunt Engine Had No Clear Operator Bounds
The Problem We Were Actually Solving We had built the Treasure Hunt Engine to power in-game treasure hunts that reward players for exploring content. …
The Day the Treasure Hunt Engine Drowned in 300 ms Queries
The Problem We Were Actually Solving In 2024 the Veltrix festival needed a treasure-hunt engine that could handle 12,000 concurrent players across thr…