1141
The Soul of an Old Machine: Revisiting the Timeless von Neumann Architecture
Revisiting the timeless von Neumann Architecture
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The latest blog posts to take off on Hacker News. 6,945 posts.
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Optimizing a WebGPU Matmul Kernel for 1 TFLOP
Building Surfgrad, a high-performant, WebGPU-powered autograd library
1144
Way too many ways to wait on a child process with a timeout
I often need to launch a program in the terminal in a retry loop. Maybe because it's flaky, or because it tries to contact a remote service that is not available. A few scenarios:
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The number given as % CPU in Activity Monitor
One of the most common reasons for opening Activity Monitor is to check the % CPU of processes that might be running out of control. How accurate are those figures, though, and should you believe t…
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SVDQuant: 4-Bit Quantization Powers 12B Flux on a 16GB 4090 GPU with 3x Speedup
A new post-training training quantization paradigm for diffusion models, which quantize both the weights and activations of FLUX.1 to 4 bits, achieving 3.5× memory and 8.7× latency reduction on a 16GB laptop 4090 GPU. Code: https://www.github.com/mit-han-lab/nunchaku
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The case of a program that crashed on its first instruction
Didn't even make it out of the gate.
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We built a self-healing system to survive a concurrency bug at Netflix
Our CPUs were dying, the bug was temporarily un-fixable, and we had no viable path forward. Here's how we managed to survive.
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QNX is now free for anything non-commercial, plus there's an RPi image
QNX is changing the game for engineers and software developers, providing free access to QNX software and resources for non-commercial use.
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Hyperlight: Virtual machine-based security for functions at scale
The Microsoft Azure Core Upstream team is excited to announce the Hyperlight project, an open-source Rust library you can use to create very small VMs for embedded functions. Learn more.
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Useful built-in macOS command-line utilities
macOS comes with a lot of built-in utilities. Here's a list of some that I find interesting.
1152
Traceroute Isn't Real
Almost nobody understands how traceroute works. Worse, it's not a real tool
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Limitations of frame pointer unwinding
Explore 3 limitations of using frame pointers for stack unwinding and profiling in Linux that are often overlooked, plus possible future alternatives.
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Why systemd is a problem for embedded Linux
I don’t want to post yet another anti-systemd rant, but I think the ubiquity of systemd could eventually create real problems for embedded Linux. I just wish I knew what to do about it.
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Speed, scale and reliability: 25 years of Google datacenter networking evolution
Google networking leaders reflect on the milestones that led to Jupiter supporting 13 petabits per second bandwidth, and what comes next.
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Next Generation Out of Band Garbage Collection
In this post we look at the impact of a new feature of Ruby 3.4 on Shopify’s monolith.
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The Dual Nature of Events in Event-Driven Architecture
On Software Architecture, Programming Languages,…2024112 points63 commentsSoftware Engineering details
Given that events play such a central role in event-driven architecture, there’s an astonishing lack of agreement on what should be contained in an event. This may be rooted in the fact that, depending on your perspective, events fulfill different purposes.
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OpenZFS deduplication is good now and you shouldn't use it
OpenZFS 2.3.0 will be released any day now, and it includes the new “Fast Dedup” feature. My team at Klara spent many months in 2023 and 2024 working on it, and we reckon it’s pretty good, a huge step up from the old dedup as well as being a solid base for further improvements. I’ve been watching various forums and…
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Async Rust is not safe with io_uring
The demo shows that even though the behavior appears similar, TCP connections leak when using the io_uring driver but not with the epoll driver. I've also tested this across various io_uring runtimes, and it turns out to be a common issue across all of them.
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Eighteen Years of ABI Stability
It has been eighteen years of libcurl ABI stability.
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Wasmer 5.0
We are thrilled to announce the release of **Wasmer 5.0**, the latest milestone in our journey to make WebAssembly the greatest tool for executing softw...
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Improving Xwayland window resizing
One of the quickest ways to determine whether particular application runs using Xwayland is to resize one of its windows and see how it behaves, for example
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NixOS is not reproducible
Okay, sorry for the clickbait. NixOS is not reproducible according to the Reproducible Builds definition. I keep reading people making this claim repeatedly on orange-site, even LWN.net made a similar claim when writing about Nix and Guix earlier this week.1 Along with their recently launched wiki. So, what is the…
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A deep dive into Linux's new mseal syscall
If you love exploit mitigations, you may have heard of a new system call named mseal landing into the Linux kernel’s 6.10 release, providing a protection called “memory sealing.” Beyond notes from the authors, very little information about this mitigation exists. In this blog post, we’ll explain what this syscall is…
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Quantized Llama models with increased speed and a reduced memory footprint
As our first quantized models in this Llama category, these instruction-tuned models retain the quality and safety of the original 1B and 3B models, while achieving 2-4x speedup.
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Zero or Sign Extend
A while back I had to deal with a bit-packed format that contained a list of integer values encoded in one of a pre-defined sets of bit widths, where both the allowed bit widths and the signed-ness…
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RISC-V is currently slow compared to modern CPUs
RISC-V is currently quite slow compared to modern CPUs in 2024.