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Evolution of the x86 context switch in Linux (2018)
Tracing the x86 context switch in Linux throughout time
Top posts
Every blog post that took off on Hacker News, ranked by the votes of its best submission. 6,947 posts.
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Where do interrupts happen?
Trying to determine exactly where asynchronous interrupts are delivered on Intel CPUs.
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Faster LZ is not the answer to 150-250 GB video game downloads
When the JPEG folks were working on image compression, they didn't create a better or faster LZ. Instead they developed new approaches. I se...
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Stop Memsetting Structures
TL;DR: Use C99’s designated initializers instead. Because it’s 2019! Edit: This post was discussed on Hacker News, Lobste.rs and /r/c_programming. It has been updated to address some of the concerns raised by commenters. One of the little things that annoy me when reading code is the unnecessary use of memset() to…
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Dusting off Dreamcast Linux
Yes, here at Old VCR we live in the past, when RISC Unix workstations still ruled the earth like large boxy tentaculous Cthulhus. Oh, sure, ...
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When you deleted /lib on Linux while still connected via SSH (2022)
Let's first not talk about why this can happen, but deleting /lib, /usr/lib, or some other essential runtime files happens quite a lot (as you can see: here, here, here, and here). In this post, I will only discuss what happens when you delete /lib on Linux and how to recover from that. The easy
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Released and Certified: Qt Safe Renderer
Explore the Qt Blog for the latest insights on e.g. Qt Creator, your go-to source for cross-platform development tips and updates.
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Where do argc and argv come from?
Continuing on from our tiny snake game , let's explore more into how binaries work on Unix. Let's figure out how our programs come to obtain their argc and argv parameters.
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Hotspot performance engineering fails
Developers often believe that software performance follows a Pareto distribution: 80% of the running time is spent in 20% of the code. Using this model, you can write most of your code without any care for performance and focus on the narrow pieces of code that are performance sensitive. Engineers like Casey Muratori…
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SiFive P550 Core: High-Performance RISC-V Processor
New SiFive Performance Family of application processors offers best in class performance, area, and efficiency for a wide variety of markets
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Slimmer and faster JavaScript strings in Firefox
Since Brendan Eich wrote the first SpiderMonkey version in 1995, there have been many, many changes to its internal string representation. New string types like ...
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151-byte static Linux binary in Rust
Part of the sales pitch for Rust is that it's "as bare metal as C". 1 Rust can do anything C can do, run anywhere C can run, 2 with code...
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Debugging C with Cosmopolitan Libc
Gautham's Blog
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SIMD within a register: How I doubled hash table lookup performance
It started with a simple thought: four bytes in a hash table bucket look just like an integer. Luckily, this one idea led to a deep dive into bit-twiddling and a 2x performance boost.
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How The Kernel Manages Your Memory
After examining the virtual address layout of a process, we turn to the kernel and its mechanisms for managing user memory. Here is gonzo again: Linux processes are implemented in the kernel as insta
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Husky, Datadog's Third-Generation Event Store
Husky is an unbundled, distributed, schemaless, vectorized column store. Here’s how we built it—and why.
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How we tracked down a Go 1.24 memory regression
We rolled out Go 1.24 and saw a memory regression. Here’s how we dug into system metrics, uncovered a bug in the runtime allocator, and worked with the Go team to help fix it.
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Why I run FreeBSD for my home servers (2024)
Why FreeBSD instead of Linux for home servers? Exploring ZFS, jails, stability, and the reasons behind choosing FreeBSD for a home infrastructure.
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What should the CPU usage be of a fully-loaded CPU that has been throttled?
A valid difference of opinion.
2993
Home truths about macOS
True or false? Apple supports macOS for three years. Apple’s security updates are sufficient. New versions of macOS are full of bugs. It’s safer to delay upgrading.
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How fast is AMP really?
Tim Kadlec writes about performance, product management, and the web.
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Ifs and &&s and Plan 9's Source Code
Spiros Eliopoulos. Blog Posts, Projects, Past Gigs, & Publications.
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Bare-Metal Kubernetes with K3s
Learn how to configure K3s on bare-metal to run a Kubernetes cluster with just as much resilience and fault tolerance as a managed service.
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Cloudflare outage on February 20, 2026
Cloudflare suffered a service outage on February 20, 2026. A subset of customers who use Cloudflare’s Bring Your Own IP (BYOIP) service saw their routes to the Internet withdrawn via Border Gateway Protocol (BGP).
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Go and Assembly
Hi I'm Caleb Doxsey and welcome to my website. I'm a software developer. If you'd like to contact me, you can email me here: [email protected] .