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Native FreeBSD Kerberos/LDAP with FreeIPA/IDM
I want to make this clear in the first sentence because its biggest chance that people will read it – this article is entirely based on work done by Christian Hofstede-Kuhn (Larvitz) that wro…
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 6,943 posts.
5702
Compute-efficient pretraining and scaling to trillion-parameter models
Research update on compute-efficient pretraining and scaling to trillion-parameter models.
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Linux Runs All of the World’s Fastest Supercomputers
Linux runs all of the world's 500 fastest supercomputers
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Why linux doesn't have a "wheel" group
The wheel group is, perhaps, not widely used today, or is seen as “archaic” and irrelevant. Nothing could be further from the truth. The wheel group is a group which limits the number o…
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Gaia-1 a 9B parameter generative world model for autonomous driving
Scaling GAIA-1: a 9-billion parameter generative world model for autonomous driving
5706
Myths about USB NKRO and how USB HID works
A common myth about USB keyboards is that they can only support 6-key rollover, and not report more than 6 keys being pressed at a time. In fact, this is wholly untrue; the USB HID device class can support full N-key rollover (NKRO). While keyboards which purport to support USB NKRO are now common, some of them have…
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Link-Time Optimisation (LTO)
I recently started exploring link-time optimisation (LTO), which I used to think was just a single boolean choice in the compilation and linking workflow, and perhaps it was like that a while ago… I’ve learned that these days, there are many different dimensions of LTO across compilers and linkers today and more…
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Oldschool Gaming on FreeBSD
When was the last time you played a computer game? I really like one of Benjamin Franklin quotes – “We do not stop playing because we grow old, we grow old because we stop playing.̶…
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Inside boost::unordered_flat_map
Introduction The case for open addressing SIMD-accelerated lookup boost::unordered_flat_map data structure Rehashing Hash post-mixing Sta...
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Fun with -fsanitize=undefined and Picolibc
Both GCC and Clang support the -fsanitize=undefined flag which instruments the generated code to detect places where the program wanders into parts of the C language specification which are either undefined or implementation defined. Many of these are also common programming errors. It would be great if there were…
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Why Intel is adding instructions to speed up non-volatile memory
The latest version of the Intel manual has a couple of new instructions for non-volatile storage, like SSDs . What's that about?
5716
Picolibc – Libc for Embedded Systems
I wrote a couple of years ago about the troubles I had finding a good libc for embedded systems , and for the last year or so I've been using something I called 'newlib-nano', which was newlib with the stdio from avrlibc bolted on. That library has worked pretty well, and required very little work to ship.
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Writing a Self-Mutating x86_64 C Program (2013)
My little corner of the web for sharing wherever my interests take me.
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Thread-Per-Core Buffer Management for a modern storage system
Redpanda powers an Agentic Data Plane and Data Streaming platform for real-time performance, AI innovation, and simplified operations.
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Linux implementation of Homa, a protocol to replace TCP for low-latency RPC
Programming note: I will be taking a several week break from writing paper reviews for the summer. When we come back, I will be finishing off the papers from Usenix ATC and OSDI , then moving on to the great upcoming conferences (my non-exhaustive list is here ). As always, feel free to reach out on Twitter with…
5721
Instrumenting Python GIL with eBPF
Learn how to measure the impact of Python GIL contention on application latency using eBPF, with real workload examples.
5722
The Right Stuff: Breaking the PageSpeed Barrier with Bootstrap
The AppNeta award-winning suite of network monitoring tools allow unparalleled SaaS-based application end-user performance monitoring for 100% delivery confidence.
5723
Linux Capabilities in a nutshell (2019)
Linux capabilities can be difficult to understand so let's go through them quickly
5724
Decompiling Hyper-V Manager to rebuild it from source
This post guides through decompiling Hyper-V Manager to rebuild it from source, aiming to assess its value for potential open-sourcing. It explores manual and automated decompilation processes, including troubleshooting and enhancing the tool, advocating for community-led improvements to this widely-used but neglected…
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Everything You Never Wanted to Know About Linker Script (2021)
Low level software usually has lots of .cc or .rs files. Even lower-level software, like your cryptography library, probably has .S containing assembly, my least favorite language for code review.
5727
Optimizing Matrix Multiplication on RDNA3
Writing Super-Fast Matrix Multiplication with HIP, RGP, and ISA
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Stuff Your Logs
Paul Khuong's personal blog. Some Lisp, some optimisation, mathematical or computer.