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The Genius of RISC-V Microprocessors
How the instruction set for RISC-V processors has been designed cleverly for both simplicity and high performance.
New
The latest blog posts to take off on Hacker News. 4,389 posts.
2252
Some Git internals
Here is my test file tree. There are two files and a "src" subdirectory, where another two files are stored:
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2254
Booting an M1 Mac from an external disk
If you’ve been unable to create a bootable external disk to use with your M1 Mac, this explains what you need and its limitations and quirks.
2255
Bare-Metal Kubernetes with K3s
Learn how to configure K3s on bare-metal to run a Kubernetes cluster with just as much resilience and fault tolerance as a managed service.
2256
eBPF Is Awesome
A blog about programming, technology and open-source stuff.
2257
An Introduction to Lock-Free Programming (2012)
Lock-free programming is a challenge, not just because of the complexity of the task itself, but because of how difficult it can be to penetrate the subject in the first place. I …
2258
Apple M1 foreshadows Rise of RISC-V
The M1 is the beginning of a paradigm shift, which will benefit RISC-V microprocessors, but not the way you think.
2259
Windows 10 20H2: ChkDsk damages filesystem on SSDs with KB4592438 installed
[German]In Windows 10 20H2 with installed cumulative update KB4592438, chkdsk causes massive issues. It destroys the file system during a disk check on SSDs, so Windows 10 can’t start after a reboot.
2260
Apple has stopped providing standalone installers for macOS updates
Apple released macOS Big Sur 11.1 on 14 December. Although yesterday it finally posted standalone installers for the two concomitant security updates to Catalina and Mojave, no standalone updaters …
2261
ARM MacBook vs. Intel MacBook: A SIMD Benchmark
In my previous blog post, I compared the performance of my new ARM-based MacBook Pro with my 2017 Intel-based MacBook Pro. I used a number parsing benchmark. In some cases, the ARM-based MacBook Pro was nearly twice as fast as the older Intel-based MacBook Pro. I think that the Apple M1 processor is a breakthrough ……
2262
Why software ends up complex
Complexity in software, whether it’s a programming languages, an API, or a user interface, is generally regarded as a vice. And yet complexity is exceptionally common, even though no one ever sets out to build something complex. For people interested in building easy to use software, understanding the causes of…
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Writing a Memory Allocator (2019)
Video lectureMutator, Allocator, CollectorMemory blockAllocator interfaceMemory alignmentMemory mappingFreeing the objectsBlocks reuseFirst-fit searchAssignmentsNext-fit searchBest-fit searchBlocks splittingBlocks coalescingExplicit Free-listSegregated-list searchOptimizing the storageCustom sbrkConclusion This is the…
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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…
2266
ZFS: Use mirror vdevs, not RAIDZ
Continuing this week’s “making an article so I don’t have to keep typing it” ZFS series… here’s why you should stop using RAIDZ, and start using mirror vdevs instead.
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If All You Have Is a Database, Everything Looks Like a Nail
Databases are fabulous resources. Of course, we’ll abuse them in ways that cause challenges.
2269
The Raspberry Pi 4 has a fan now – the Case Fan
Last year, I wrote a blog post titled The Raspberry Pi 4 needs a fan. And in a video to go along with that post, I detailed the process of drilling out a hole in the top of the official Pi 4 case and installing a 5v fan inside. But that solution wasn't great. The fan was a little loud and annoying, and would stay on…
2270
Fixing a 3 year old bug in Nvidia GeForce Experience
Background: Joystick Preventing Display Sleep A few months ago, I thought I ought to try Microsoft Flight Simulator 2020. The facsimile of o...
2271
Linux kernel heap quarantine versus use-after-free exploits
It's 2020. Quarantines are everywhere – and here I'm writing about one, too. But this quarantine is of a different kind. In this article I'll describe the Linux Kernel Heap Quarantine that I developed for mitigating kernel use-after-free exploitation.
2272
Feature Casualties of Large Databases
Databases shed important RDMS features as they get big. Examining why this tends to be the case, and some ideas for preventing it.
2273
macOS to FreeBSD migration a.k.a. why I left macOS
This is not a technical documentation for how I migrated from macOS to FreeBSD. This is a high-level for why I migrated from macOS to FreeBSD.
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ARM and Lock-Free Programming
I was inspired by the release of Apple’s M1 ARM processor to tweet about the perils of lock-free programming which led to some robust discussion. The discussion went pretty well given the inanity o…
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Running a full desktop environment on a Kindle (2019)
Ethical Hacking and Cybersecurity Blog
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How many registers does an x86-64 CPU have?
x86 is back in the general programmer discourse, in part thanks to Apple’s M1 and Rosetta 2 . As such, I figured I’d do yet another x86-64 post.
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Interval Tree Clocks
Notes on Interval Tree Clocks
2280
A better Kubernetes from the ground up
If we were to start over from first principles, what would I do differently than k8s?