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Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 6,942 posts.
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eBPF will help solve service mesh by getting rid of sidecars
eBPF Service Mesh - How we can build an eBPF-based service mesh in the kernel to replace the complex sidecar model
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Defcon: Preventing overload with graceful feature degradation (2023)
This is one in a series of papers I’m reading from OSDI and Usenix ATC. These paper reviews can be delivered weekly to your inbox , or you can subscribe to the Atom feed . As always, feel free to reach out on Twitter with feedback or suggestions!
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APFS in Detail
Apple announced a new file system that will make its way into all of its OS variants (macOS, tvOS, iOS, watchOS) in the coming years. Media coverage to this…
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Understanding Memory Management, Part 1: C
UPDATED: 2025-02-15: Fixed some bugs in the examples and pointed out that you don't usually just want to panic on memory allocation failure.
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Linux Kernel Exploitation: Attack of the Vsock
What started off as casual scrolling through the KernelCTF submissions quickly spiraled into a weeks-long deep dive into a deceptively simple patch - and my first root shell from a Linux kernel exploit!
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Debugging a rustc segfault on Illumos
Using `mdb` and `pmap` to find the cause of a crash.
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Hot-code reloading on macOS/arm64 with Zig
Jakub Konka's weblog about programming, game theory, maths, and more.
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Scaling One Million Checkboxes to 650M checks
How I scaled One Million Checkboxes to handle half a million users
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Raspberry Pi 4 as a USB-C peripheral
I’ve previously blogged about using Pi Zero (and Zero W) devices as USB Gadgets. This allows them to be powered and accessed via one of the micro USB sockets and it shows up as both a CD-Driv…
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Technical Challenges Developing a Distributed SQL Database
Here is an outline of some of architectural issues addressed as we build YugabyteDB, our high-performance distributed SQL database.
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Apple Silicon and Virtual Machines: Beating the 2 VM Limit (2023)
macOS Internals Deep Dive Building a Development Kernel Collection Configuring our Mac to boot the Development Kernel Collection Putting our machine to work! When did Apple grace us with this feature? Undoing our work for OS updates Closing Thoughts
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Raspberry Pi 4 PCIe bridge “chip”
After seeing the work done by Thomasz Mloduchowski and Colin Riley with managing to bridge the Raspberry Pi 4's PCI-Express bus to a USB 3.0 port, and then seeing these comments on hack-a-day, I thought I would give it a go too! So, here's a PCIe bridge chip that simply replaces the VL805 USB 3.
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File Descriptor Limits
Posts and writings by Lennart Poettering
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Partitioning GitHub’s relational databases to handle scale
In 2019, to meet growth and availability challenges, we set a plan in motion to improve our tooling and ability to partition relational databases.
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Psychic Paper: iOS Sandbox Escape
Siguza’s Blog
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Pipe Viewer – A Unix Utility You Should Know About
Hi all! I'm starting a new article series here. This one is going to be about Unix utilities that you should know about. The articles will discuss one Unix program at a time. I'll try to write a good introduction to the tool and give as many examples as I can think of. The first post in this series is going to be…
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Ncdu 2: Less hungry and more Ziggy
Ncdu (NCurses Disk Usage) is a terminal-based disk usage analyzer for Linux and other POSIX-y systems, (formerly) written in C and available in the package repositories of most distributions.
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Look Ma, No Bubbles: Designing a Low-Latency Megakernel for Llama-1B
Benjamin Spector* , Jordan Juravsky* , Stuart Sul , Owen Dugan , Dylan Lim , Dan Fu , Simran Arora , Chris Ré
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Systemd redux: The end of Linux
I figured it was about time for a followup on my systemd post. I’ve been meaning to do it for a while but time hasn’t allowed.
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Why has CPU frequency ceased to grow? (2014)
A portfolio of HPC tools help data scientists, researchers, and developers efficiently build cross-architecture applications.
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Why systemd?
This blog post is based on a talk I gave on 2014-05-21. For a few years now, GNU/Linux distributions have been migrating away from SysV ini...
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Dear Linux, Privileged Ports Must Die
Privileged ports were a security feature in the days of dumb terminals, in the age of the World Wide Web, they are a security vulnerability.
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WinGet is terrible, I want AppGet back
It’s been almost a year that Keivan Beigi shut down the AppGet project in response to shenanigans by the Windows App Model team. Microsoft…
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macOS 14.4 causes JVM crashes
Java users on macOS 14 running on Apple silicon systems should consider delaying the macOS 14.4 update
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Arch Linux on MacBook Pro Retina 2014
[Version française] (/2015/01/arch-linux-sur-macbook-pro-retina-2014-avec-dm-crypt-lvm-et-hibernation)