Topics /
The most popular blog posts about systems & performance on Hacker News. 4,389 posts.
A door is a "file" descriptor used to describe a procedure in a process and optionally some additional state associated with the procedure. Doors were initially designed as Spring object descriptors used to encapsulate the state and capabilities of C++ objects. A process which obtains a door is free to pass it, along…
An essay that bids farewell to x87 – a computing architecture too long for this world.
The urge to replace the mainframe has reinvented the mainframe and its problems.
A practical introduction to TLA+, why it matters for agentic coding, and how AI could take formal verification from models to machine-checked proofs and ultimately to verified software.
Following these steps, you will add hardware acceleration decoding capabilities to the Chromium web browser. This is an extension to the tutorial about DRM for Chromium on the Raspberry Pi. Videos from Amazon Prime, Netflix, Disney+, Youtube, etc. can be decoded using the Raspberry Pi GPU.
You’re walking at $HOME, minding your own business. $ whoami > user $ pwd > /home/user But something is bothering your feet. It’s like if a little rock has fallen into your shoe. You take it off, to see what’s going on. $ ls -lah ./left-shoe ---------- 1 root root 4 May 30 13:20 little-rock That’s odd. It’s there, but…
Published: 09-04-2023 23:59 | Last update: 11-04-2023 22:29 | Author: Remy van Elst | Text only version of this article
An apparently trivial and uninteresting task nonetheless received some special optimization care within FSE : counting the bytes (or 2-...
Berkeley Sockets (BSD) are the de facto API for all network communication. With roots from the early 1980's, it is the original implementation of the TCP/IP suite, and arguably one of the most widely supported and critical components of any operating system today. BSD sockets that most of us are familiar with are…
For the last few years, I've been developing caching library, and today I'd like to talk about the evolution of caches in Go and where we stand today. Especially since Go 1.24 was officially supposed to focus on caching improvements, but I haven't heard much news about them - time to fix that .
A list of things that we can do when we need to scale a SQL database.
Zombies probably won’t consume 32 GB of your memory like they did to me, but zombie processes do exist, and I can help you find them and make sure that developers fix them. Tool source link is at t…
How hot code loading solves client-specific engineering problems in my startup Alzo
If you've ever used the GNU Compiler Collection (GCC) then you've worked with the gcc binary. For those who don't know, gcc is a driver, not a compiler. It runs the compiler/assembler/linker as required and coordinates the input and output between them. Use of the driver is so ubiquitous that everyone calls it the…
In my last post I introduced an Emacs Lisp VM I was writing in Rust. My stated goal at the time was to complete a garbage collector. I think Rust has some really interesting properties that will make building garbage collectors easier and safer. Many of the techniques used in my GC are not original and have been…
While delivering a training recently, I got a request to put together a JVM tuning cheat sheet. Given the 50+ parameters available on the ...
Some time ago I stopped releasing EasyOS as an ISO file, from then onward as a drive image file only. This has been contentious, and I receive emails from people lamenting the demise of the ISO. So, I should post some thoughts why I made this decision. Not an exhaustive rationale, just some thoughts while I think of…
Important article slash rant about the recent story involving Linus Torvalds and his behavior in the Linux kernel development circles, the subsequent apology, the fallout, and the disturbing implications and ramifications of the whole affair on the long-term survival of Linux as a whole
Saagar Jha's website.
tl;dr: The ODROID-C2 is a very solid competitor to the Raspberry Pi model 3 B, and is anywhere from 2-10x faster than the Pi 3, depending on the operation. The software and community support is nowhere near what you get with the Raspberry Pi, but it's the best I've seen of all the Raspberry Pi clones I've tried. The…
Sending a ping by creating an ICMP socket normally requires root: you can’t create a raw socket to send ICMP packets without it. The ping command line tool works without root however, how is that possible? It turns out you can create a UDP socket with a protocol flag, which allows you to send the ping rootless. I…
You're probably reading this page because you've attempted to access some part of my blog (Wandering Thoughts) or CSpace , the wiki thing it's part of. Unfortunately you're using a browser version that my anti-crawler precautions consider suspicious, most often because it's too old (most often this applies to versions…
Earlier today I did a livestream on my YouTube channel to attempt using an Nvidia GeForce GTX 1080 on a Raspberry Pi Compute Module 4. As with all my testing, I'm documenting everything I learn in this GitHub issue, which is part of the Raspberry Pi PCI Express Card Database website. It's only been a few hours, but…
See how AWS Lambda arm64 stacks up against x86_64 in real-world benchmarks across CPU, memory, and I/O workloads using Node.js, Python, and Rust.
UPDATE: this post unexpectedly ended up on Hacker News and I received a lot of comments. The two most important points being made are (1) that Secure Boot on the RPi as …
I recently decided to learn more about Rust, and wrote a high performance RaptorQ (RFC6330) library. RaptorQ is a fountain code, and the core of the algorithm is a lot of matrix math over GF(256) – which translates into lots of XORs and reads from lookup tables. After getting the initial implementation working, I set…
