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Anti-patterns in event-driven architecture
Event-driven architecture is great, but it can cause a lot of headaches if it is used for the wrong purpose.
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epoll: The API that powers the modern internet (2022)
Linux's epoll API solved the C10K problem, enabling fast and afforable Internet services.
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Glory is only 11MB/sec away (2023)
One thing is certain in life: if you’re getting something for a steal, someone is getting screwed, and it’s probably you elsewhere. This isn’t an anti-capitalist rant, it’s just the truth. Companies don’t exist if they don’t make money. Unless there’s some innovation, rest assured that you’re overpaying somewhere else.
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The One Billion Row Challenge in CUDA
On my journey to learn CUDA, I decided to tackle the One Billion Row Challenge with it.
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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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Debugging a rustc segfault on Illumos
Using `mdb` and `pmap` to find the cause of a crash.
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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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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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K8s Service Meshes: The Bill Comes Due
Kubernetes Service Meshes aren't free anymore, what teams need to know moving forward.
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Why does an extraneous build step make my Zig app 10x faster?
For the past few months, I’ve been curious about two technologies: the Zig programming language and Ethereum cryptocurrency. To learn more about both, I’ve been using Zig to write a bytecode interpreter for the Ethereum Virtual Machine. Zig is a great language for performance optimization, as it gives you fine-grained…
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Practices of Reliable Software Design
It should have good performance and be able to hold many entries. Reads are more common than writes. I know how I would do it already, but I’m curious about your approach.
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Reformatting 100k Files at Google in 2011
Laurent Le Brun's blog
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SSH as a Sudo Replacement
A major caveat in tools like sudo and doas for that matter is that they rely on setuid binaries and privilege escalation in order to run commands as root.
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Beating Jeff's 3.14 Ghz Raspberry Pi 5
Jeff came up against a 1V limit in his video " Overclocking Raspberry Pi 5 to 3.14 GHz on Pi Day " after firmware was released to remove the 3Ghz limit.
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Learning about PCI-e: Driver and DMA
Creating a simple driver for a simple PCI-e device (in QEMU)
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Every bug/quirk of the Windows resource compiler (rc.exe), probably
Fuzz testing decades-old software can turn up some curious behaviors
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Troubleshooting: Terminal Lag
I think I should blog more about random troubleshooting sessions, if nothing else it will remind me what steps I took when it inevitably happens again!
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Raspberry Pi boosts Pi 5 performance with SDRAM tuning
tl;dr Raspberry Pi engineers tweaked SDRAM timings and other memory settings on the Pi, resulting in a 10-20% speed boost at the default 2.4 GHz clock. I of course had to test overclocking, which got me a 32% speedup at 3.2 GHz! Changes may roll out in a firmware update for all Pi 5 and Pi 4 users soon. My quest for…
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Elixir/Erlang Hot Swapping Code (2016)
Hot code reloading with Elixir and Erlang
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No NAT November: My month without IPv4
Near the beginning of November, nixCraft posted this challenge on Mastodon, daring people to take the No NAT November challenge and disable IPv4 for the month, relying only on IPv6:
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Playstation 2 GS emulation – the final frontier of Vulkan compute emulation
As you may, or may not know, I wrote paraLLEl-RDP back in 2020. It aimed at implementing the N64 RDP in Vulkan compute. Lightning fast, and extremely accurate, plus the added support of up-scaling on top. I’m quite happy how it turned out. Of course, the extreme accuracy was due to Angrylion being used as reference…
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So We've Got a Memory Leak
A story of finding, understanding, and fixing a memory leak in our Rails app. With graphs and code!
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Iconography of the X Window System: The Boot Stipple
If you are of a certain vintage, this image is burned indelibly somewhere in your posterior parietal complex: Oh, my old friend. How it’s been a long time. Cultural Significance For the uninitiated, what are we looking at? Could it be the Moiré Error from Doom? Well, no. You are looking at (part of) the boot up screen…
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How to build highly-debuggable C++ binaries
code { white-space : pre-wrap !important; } This article is tightly scoped to cover one topic with specific, actionable advice: How to configure...
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