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Unicorn Unix Magic Tricks
This post is based on the talk of the same name I gave at the Arrrrcamp conference in Ghent, Belgium on October 2nd, 2014. You can find the slides here and the video recording here .
Top posts
Every blog post that took off on Hacker News, ranked by the votes of its best submission. 6,949 posts.
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How to bring up the Linux Kernel on a new platform
A guide to bringing up the Linux Kernel and a userspace application on a new hardware (or in this case, a self-made emulator)
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Race you to the kernel
Posted by Ian Beer of Google Project ZeroThe OS X and iOS kernel code responsible for loading a s...
6544
Resilience in Complex Systems (2021)
Everyday human reasoning breaks down as the scale of time and space at play increases. Complex systems thinking gives us a new set of tools to better understand the chains of consequences involved, and make better decisions.
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Understanding Raft Consensus
Recently I was digging deeper into Raft , an important algorithm in the field of distributed systems. Raft is a consensus algorithm , meaning that it is designed to facilitate a set of computers agreeing on a state of the world (more on exactly how the state of the world is represented later), even when communications…
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Performance Showdown: Rust vs Javascript (2020)
After spending some weeks playing with Rust, I felt ready to test my skills and try some programming challenges in the [Advent Of Code](https://adventofcode.com/). My approach to tackle some of those challenges was to solve them using Javascript (I use it in my day to day) first and then port the code to Rust. While…
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ARM MacBook vs. Intel MacBook
Up to yesterday, my laptop was a large 15-inch MacBook Pro. It contains an Intel Kaby Lake processor (3.8 GHz). I just got a brand-new 13-inch 2020 MacBook Pro with Apple's M1 ARM chip (3.2 GHz). How do they compare? I like precise data points. Recently, I have been busy benchmarking number parsing routines where you…
6549
Frugal Computing (2021)
On the need for low-carbon and sustainable computing and the path towards zero-carbon computing.
6550
Windows Timer Resolution: The Great Rule Change
The behavior of the Windows scheduler changed significantly in Windows 10 2004 (aka, the April 2020 version of Windows), in a way that will break a few applications, and there appears to have been …
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Mkfile(8) is severely syscall limited on OS X
When I got my brand-new MacBook Pro (late 2016), I was interested in testing out the phenomenal SSD performance I had been reading about, r...
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Windows 10 Insider Preview Build 14316 Released
Hi everyone, Today we are releasing Windows 10 Insider Preview Build 14316 to Windows Insiders in the Fast ring. At Build 2016 last week, we shared new experiences and new opportunities we’re creating for developers with the Windows 10 Anniversary Update which we will be releasing for free to all Windows 10 customers…
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Pixelbook and “Nami” Chromebooks the First to Get Linux GPU Acceleration
The Pixelbook and four other fairly new Chromebooks have the special flag to enable GPU acceleration, making these the first to get the new feature for Linux. This should bring the Android emulator and improved gaming capabilities to Project Crostini.
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Windows NT: Peeking into the Cradle
A review of "Showstopper!" by G. Pascal Zachary and my own reflections
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Future instruction set: AVX-512
Software optimization resources | E-mail subscription to this blog | www.agner.org
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Debugging my new network, when 10 Gigabit Ethernet Runs at 300 Megabits
I've been moving my home storage over to a UniFi UNAS Pro 8 as part of a larger ...
6559
The hidden cost of QUIC and TOU (2016)
Some new proposed protocols will encrypt the transport layer headers. Encryption is good, so more encryption must be better, right? Unfortunately there's going to be a huge hidden cost that'll be paid by anyone troubleshooting networking problems.
6560
Preparing for the .NET 10 GC
In .NET 9 we enabled DATAS by default. But .NET 9 is not an LTS release so for many people they will be getting DATAS for the first time…
6561
Installing A/UX on the Quadra 610 (2018)
In this post, I’m going to go through the process of setting up Apple’s A/UX on a Quadra 610. It’s been a long time in the making - I think I had the hardware for nearly a year before I finally got A/UX running properly!
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You are not Google. You are not Netflix
You are also not Spotify, Amazon, Apple, Microsoft, Facebook or one of several other big tech companies I could mention here. If I have excluded anybody reading this - I am sorry.Maybe you will still enjoy the read. For everyone else: This article is probably for you. To give you...
6563
Nginx with dynamic upstreams
I recently made a setup at work where I had a Nginx server facing the user, which would forward requests to a service running behind an AWS Elastic Load Balancer (aka. ELB). That in itself doesn’t sound like a difficult task, you just find the hostname for the ELB and point Nginx at it with a proxy_pass statement like…
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Exercises in Emulation: Xbox 360’s FMA Instruction
Years ago I worked in the Xbox 360 group at Microsoft. We were thinking about releasing a new console, and we thought it would be nice if that console could run the games of the previous console. E…
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A small Rust binary indeed (2022)
Can we make a Rust program that's as small as it's assembler equivalent?
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Data-only attacks are easier than you think (2024)
Data-only attacks, those that do not affect a program’s control flow, have long been considered too sophisticated and niche to pose a practical threat. With our research, however, we have built a tool that automatically generates them with surprising ease. We explain how such attacks work, and why our tool, Einstein…
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Multi-Kernel Drifting
Using truss, dtrace & ctfconvert to figure out a faulty illumos kernel module.
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