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Debugging a rustc segfault on Illumos
Using `mdb` and `pmap` to find the cause of a crash.
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 4,387 posts.
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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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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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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…
1301
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.
1302
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.
1303
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…
1306
Arch Linux on MacBook Pro Retina 2014
[Version française] (/2015/01/arch-linux-sur-macbook-pro-retina-2014-avec-dm-crypt-lvm-et-hibernation)
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Cache Eviction: When Are Randomized Algorithms Better Than LRU? (2014)
Once upon a time, my computer architecture professor mentioned that using a random eviction policy for caches really isn't so bad. That random eviction isn't bad can be surprising — if your cache fills up and you have to get rid of something, choosing the least recently used (LRU) is an obvious choice, since you're…
1308
Fedora 36: A brave new (DRM/KMS only) world
The upcoming Fedora release includes a change proposed by Peter Robinson and yours truly, that disables all the Frame Buffer Device (fbdev) drivers in the Linux kernel package. This means that star…
1309
That Old NetBSD Server, Running Since 2010
A retrospective on a NetBSD server set up in 2010 under tight deadlines, running almost untouched for over a decade on consumer-grade hardware-proof of the OS's remarkable stability.
1310
Seagate just reinvented the disk interface using Ethernet
There’s no doubt that cloud computing is the future of IT infrastructure. Its scalability, ease of access and capacity for analysing vast amounts of data has made it integral to how businesses, organizations, and end-users use the internet.
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Year 2038 problem is still alive and well
Largely because of a single code snippet used by many.
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A bug in GCC that may cause memory leaks in valid C++ programs
This post is to inform you about a bug in GCC that may cause memory (or other resource) leaks in your valid C++ programs.
1314
Hardening macOS
Quick and easy guide for securing macOS systems, for both laymen and security enthusiasts. Last updated for Golden Gate.
1315
Hanging S3 downloads
Large downloads work from all other servers, but fail from S3. Must be a problem on their end, right?
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Environment variables are a legacy mess: Let's dive deep into them
Programming languages have rapidly evolved in recent years. But in software development, the new often meets the old, and the scaffolding that OS gives for running new processes hasn’t changed much since Unix.
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A faster BBC News front page
Web performance is something I care deeply about both as a developer whose work affects millions of people around the world, and as a user who often accesses the web on slow & unreliable connections. I have regularly and loudly complained that...
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One Dog vs. the Windows 3.1 Graphics Stack
a bunch of weird and random technical stuff