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S32 Unix Clock
I've been thinking I should do more "short form" blogging. Something between microblogging and regular blogging. This is me doing that!
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 555 posts.
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Replacing HLS/Dash – Live Mass Fanout with Media over QUIC
Media over QUIC: Low-latency, high bitrate, mass fan-out is hard. Who knew?
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Parsing the .DS_Store File Format (2018)
About two years ago I came across a .DS_Store file and wanted to extract its information (e.g. file names). After researching the file format and its security implications, as well as writing a parser for it, I would like to share my (limited) knowledge and the parser in Go / Python with the world. You might want to…
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How does Linux handle writes?
I examine the somewhat surprising way how Linux handles writes.
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Unix Domain Sockets vs Loopback TCP Sockets (2014)
Two communicating processes on a single machine have a few options. They can use regular TCP sockets, UDP sockets, unix domain sockets, or shared memory. A recent project I was working on used Node…
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Embrace Complexity; Tighten Your Feedback Loops
Talk transcript on various patterns that slowly influence how teams deal with reliability, and highlight some of the key interactions and behaviors I keep finding work well in the organizations I've been part of.
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I didn’t learn Unix by reading all the manpages (2022)
Originally drafted as a thread on hackers.town , after Abbie Normal asked me to expand on a side comment in a discussion of documentation .
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How Amazon uses chaos engineering to handle 80k requests per second
Discover how Amazon Search combines technology and culture to empower its builder teams, ensuring platform resilience through Chaos Engineering.
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FlashAttention: Fast Transformer training with long sequences
Transformers have grown deeper and wider, but training them on long sequences remains difficult. The attention layer at their heart is the compute and memory bottleneck: doubling the sequence length would quadruple the runtime and memory requirements.
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Overhead of Python asyncio tasks
Textual is a TUI framework for Python, inspired by modern web development.
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How Microsoft attempted to make the Xbox 360 dashboard load faster
The October 2012 Xbox 360 dashboard update moved the dashboard from the nand flash to the hard-drive. Does it make a difference?
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The Architecture of Serverless Data Systems
I recently blogged about why I believe the future of cloud data services is large-scale and multi-tenant, citing, among others, S3. “ Top tier SaaS services like S3 are able to deliver amazing simplicity, reliability, durability, scalability, and low price because their technologies are s
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Gentoo Linux 2022 Retrospective
News and information from Gentoo Linux
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Run a macOS VM on Apple Silicon from a double-click with Vimy
Making it quicker and simpler to run a macOS VM: with Vimy all you need do is double-click its bundle, and the VM runs using its previous settings.
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How to make smaller C and C++ binaries
This blog post presents several techniques to make the binaries resulting from C or C++ compilation smaller with GCC (or Clang). Please note...
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Z Garbage Collector: The Next Generation
The Z Garbage Collector (ZGC)—a scalable, low-latency garbage collector providing sub-millisecond max pause times—continues to evolve. This session will review the design goals behind ZGC and provide a look into the impact of the upcoming support for multiple generations. It will also present general guidance on…
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i386 in Ubuntu won't die
(yet) tl;dr In a recent thread on Mastodon, it was revealed that Ubuntu 23.04 users can’t install the Steam deb package from the Ubuntu archive without jumping through some technical hoops. It turns out this was a mistake, a bug was filed, and future builds shouldn’t have this problem. It’s not immediately apparent…
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Fedora 38 LLVM vs. Team Fortress 2
F38 just released and seeing a bunch of people complain that TF2 dies on AMD or other platforms when lavapipe is installed. Who's at fault? ...
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Emulating win32
How retrowin32 works, at a high level.
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Snappy UIs with WebAssembly and Web Workers
Our web app allows users can change the length of a song or find loops present in it for infinite listening, remixing, or for their next next video edit or performance. After uploading a song, there is an initial server-side analysis step after which...
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Running KDE Plasma on RISC-V VisionFive-2
New year, new RISC-V Yocto blog post \o/ When I wrote my last post, I did really not expect my brand new VisionFive-2 board to find its way to me so soon… But well, a week ago it was suddenly…
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Reverse engineering the Intel 386 processor's register cell
The groundbreaking Intel 386 processor (1985) was the first 32-bit processor in the x86 line. It has numerous internal registers: general-pu...
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Libreboot 20230319 Released
Libreboot – Libreboot 20230319 released!
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AMD ROCm: A Wasted Opportunity
This post will mainly focus on ROCm HIP wasted opportunities for adoption. I wrote an overview of ROCm earlier at https://threedots.ovh/blog/2021/11/what-is-amd-rocm/ . This post will specifically eschew talking about issues about the API renames in ROCm HIP – breaking source compatibility with CUDA quite needlessly.
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Classes vs. structs in .NET: how not to teach about performance
It’s been a while since my last blog post, but I believe it’s better to post late than never, so here I am!
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Xfinity Stream on Linux: A Tale of Widevine, ChromeOS, and a patched Glibc
If your household uses Xfinity for cable, you have almost definitely heard of Xfinity Stream at some point. If you haven’t, Xfinity Stream is a service that allows you to access Xfinity’s on-demand TV over the internet. This can be useful if you want to watch something on Xfinity’s on-demand TV but do not want to go…
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You could have invented futexes
The futex ( f ast u serspace mu tex ) is a Linux kernel feature designed for synchronization primitives (mutexes, condition variables, semaphores, etc.). Like many topics in concurrency, they have a reputation for being tricky (for example, see the paper Futexes Are Tricky ). Despite that, they really are a…