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Emulating x86 on X64 on Aarch64
Emulating win32 on Mac using Apple's x64 emulator.
New
The latest blog posts to take off on Hacker News. 4,387 posts.
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Ode to the M1
It is not often I am blown away by a piece of hardware. My Hall of Fame features the 1991 Super Nintendo, the 1995 3dfx1, and the 2010 Intel's Serie 520 SSD [1] . This past month my 2021 MacBook Pro M1 [2] joined the club.
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Fedora Asahi Remix first impressions
My personal website and blog
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Squeeze the hell out of the system you have
When complexity leaps are on the table, there’s usually also an opportunity to squeeze some extra juice out of the system you have. By tweaking the workload, tuning performance, or supplement…
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Graceful behavior at capacity
Suppose we’ve got a service. We’ll gloss over the details for now, but let’s stipulate that it accepts requests from the outside world, and takes some action in response. Maybe those requests are HTTP requests, or RPCs, or just incoming packets to be routed at the network layer. We can get more specific later. What…
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Linux guide for power users (2022)
A guide to help you setup your Linux work machine and configure it for a power users workflow
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Gnu/Hurd strikes back: How to use the legendary OS in a (somewhat) practical way
How to use the legendary OS in a (somewhat) practical way
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Simple Networking in Linux
Industrial production of readable insanity
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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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Why libvirt supports only 14 PCIe hotplugged devices on x86-64
You might have used libvirt , a Linux daemon that provides an abstraction and management layer for virtualization software. This daemon allows you to submit an XML file containing a description of a VM, disk image or network. libvirt is then able to configure, start it and keep it running.
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System settings that aren’t in System Settings
Where would you set the default call handler for macOS? And where in System Settings do you set the default web browser?
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Systemd auto-restarts of units can hide problems from you
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…
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Can you trust a compiler to optimize your code?
More or less the title this time, but first, a story about SIMD. There are three levels of understanding how SIMD works (well, at least I am level 3 at the moment):
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The shell and its crappy handling of whitespace
From the highly eclectic blog of Mark Dominus
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A dive into the AMD driver workflow
I ended up getting a response from high level people at AMD. It was still very light on any real technical information, but it did include some great phrases like “I am able to replicate the issues you are facing” and some mockable phrases like “We are hoping that this will improve your perception of AMD products and…
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On the future of free long term support for Linux distributions
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…
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Building and operating a pretty big storage system called S3
Three distinct perspectives on scale that come along with building and operating a storage system the size of S3.
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Practical comparison of ARM compilers
My inspiration for this article was this thread in r/embedded . There are still many myths and misconception when it comes to the simple questions "Which compiler should I use?" or "Which compiler is the best?". I will try to share my practical experience with GCC, Clang and IAR on Cortex-M ( and Cortex-M only ). This…
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Zenbleed
If you remove the first word from the string "hello world" , what should the result be? This is the story of how we discovered that the answer could be your root password!
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Debian riscv64
After many years of effort, I am happy to announce that Debian riscv64 is now an official architecture! This milestone is not the end of the...
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ldd arbitrary code execution (2009)
The `ldd` utility is more vulnerable than you think. It's frequently used by programmers and system administrators to determine the dynamic library dependencies of executables. Sounds pretty innocent, right? Wrong! In this article I am going to show you how to create an executable that runs arbitrary code if it's...
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Threads and Goroutines
So after several years of reading oversimplified and flat out incorrect comments about threads and fibers/goroutines/async/etc and fighting this reaction: I’ve decided to write my own still-over-simplified all in one guide to the difference between a couple popular threads and fiber implementations. In order to…
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What every IT person needs to know about OpenBSD (2021)
How to have fun with the world’s most important free software project "Functional, free and secure by default", OpenBSD remains a crucial yet largely unacknowledged player in the open source field. This talk aims to highlight the project's signature security features and development practices -- razor sharp focus on…
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How does iCloud work? Plus a new version of Cirrus
Differences between CloudKit and iCloud Drive, what each does, and how it works. New version of Cirrus to test and check iCloud function.
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Making the most of Apple Silicon power: 2 Core capabilities (2022)
P cores are conventional in that they can deliver excellent performance at maximum frequency, but with high power use. E cores may take 4 times as long for a task, but use less than a third of the …
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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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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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What we talk about when we talk about system design
Early in my research career, I had a chance to work with some of the best system researchers1 in the world on a number of really interesting system designs. One of the enjoyable aspects of research was the particular process used by researchers (particularly in the SOSP/OSDI community) to come up with novel yet…
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Nanosecond timestamp collisions are common
I was wondering: how often do nanosecond timestamps collide on modern systems? The answer is: very often, like 5% of all samples, when reading the clock on all 4 physical cores at the same time. As a result, I think it is unsafe to assume that a raw nanosecond timestamp is a unique identifier.