The latest blog posts to take off on Hacker News. 6,943 posts.
I love C. I could give you rational reasons for that. Like the fact that it works everywhere and how it goes fast. But mostly I love C because when I write C I feel an intimate connection with my computer. To me, C has soul. In fact all my personal project are written in C, like the graphics rendering engines that I'm…
While not an absolute requirement for modern graphics card support on Linux, Resizeable BAR support makes GPUs go faster, by allowing GPUs to throw data back and forth on the PCIe bus in chunks larger than 256 MB. In January, I opened an issue in the Raspberry Pi Linux repo, Resizable BAR support on Pi 5. Unlike most…
I’m entirely convinced that basically every developer alive today heard the adage “dress for the job you want, not the job you have” and figured that, since they always wear jeans and a t-shirt anyway, they might as well apply it to their systems’ architecture. This explains why the stack of every single company I’ve…
Problems and Algorithms
View the code on GitHub
A modular embedded ecosystem—bare-metal hardware, software stacks, and a cloud platform for real-time IoT and distributed systems.
Let's look at Vec<T> to get a better understanding of its inner structure.
False sharing, AoS vs SoA, random access, branch prediction: re-measured with go test -bench on two machines. Some claims held, some didn't.
tl/dr: it can deliver big performance speedups at modest area cost
In computer science, we often compare the efficiency of algorithms by describing their runtime as a function of the size of the input. Sorting is O(n * log(n)), meaning that sorting a list of N items takes an amount of time proportional to the number of items multiplied by its logarithm. Matrix multiplication is…
Quantum Software and the microkernel UNIX
In this blog post, we walk through how to use Matrix Cores in HIP kernels, with a focus on low-precision data types such as FP16, FP8, and FP4, as well as the new family of Matrix Core instructions with exponent block scaling introduced in the AMD CDNA™4 architecture. Through code examples and illustrations, we…
Using a decommissioned Alibaba cloud accelerator card as an FPGA dev board
Andrew Kelley famously (or infamously, depending on your views) said "the compiler is too damn slow, that's why we have bugs." 1
As is true for everything, a lot of things need to happen for anything to happen, and so it’s true for this blogpost as well. Out of all of these everything that needed to happen, 3 are these:
No-one really likes engineering war stories, but this one's relevant because there's a moral to it. I've talked before about defining technical debt as technical decisions that provide immediate value, but with long-term negative impact if they aren't cleaned up. Sometimes introducing technical debt
How Databricks uses client-side load balancing to improve gRPC traffic, reduce tail latency, and handle ingress with real-time service discovery.
While ZFS has a well-earned reputation for data integrity and reliability, OpenZFS native encryption has some incredibly sharp edges that will cut you if you don't know where to be careful. Unfortunately, I learned this the hard way, standing in a pool of my own blood and tears after thoroughly lacerating myself…
My attempt at talking about one of the most underrated features of C#.
I recently tried using the Minisforum DEG1 GPU Dock with a Raspberry Pi 500+, using an M.2 to OCuLink adapter, and this chenyang SFF-8611 Cable. After figuring out there's a power button on the DEG1 (which needs to be turned on), and after fiddling around with the switches on the PCB (hidden under the large metal…
A little walkthrough on an image decoder algorithm's high-level optimization, in order to make more digestable for a 6502 processor.
Benjamin Spector* , Jordan Juravsky* , Stuart Sul* , Dylan Lim , Owen Dugan , Simran Arora , Chris Ré
ETH Zürich’s new VMScape attack hit KVM and VMware, but Xen’s microkernel-like design kept it out of reach.
Read THE WEIRD CONCEPT OF BRANCHLESS PROGRAMMING on sanixdk.xyz
Most C++ and Rust thread pools run 10x slower than OpenMP on fork-join workloads. Fork Union closes the gap to 20% with 300 lines, dodging mutexes and CAS.
I spent 3 weeks earlier this year digging in to and reimplementing the lossless compression algorithm in Fuji’s RAF Camera RAW files. This post discusses the fundamentals of how it works.
Motivation Around 20% of Firefox’s HTTP traffic today uses HTTP/3, which runs over QUIC, which in turn runs over UDP. This translates to substantial UDP I/O activity. Firefox uses NSPR for most of its network I/O. When it comes to UDP I/O, NSPR only offers a limited set of dated APIs, most relevant here PR_SendTo and…
These days the internet as a whole is mostly constructed out of point to point ethernet circuits, meaning an ethernet interface (mostly optical) attached directly from one routing device to another routing device.
The challenge, simulate millions of particles in golang, multi-player enabled, cpu only, smart tv compatible.
The critical section may be an old dog, but it's still learning new tricks.
