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XXH3 – a new speed-optimized hash algorithm
xxh3 XXH3 - a new speed-optimized hash algorithm The xxHash family of hash functions has proven more successful than ...
New
The latest blog posts to take off on Hacker News. 4,389 posts.
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SweRV – An Annotated Deep Dive of the SweRV RISC-V Core
Every 6 months, the RISC-V consortium organizes a two day workshop where various companies and research entities present work that is one way or the other related to RISC-V.
2824
Rebuilding My Personal Infrastructure With Alpine Linux and Docker
My story of replacing three servers, across two countries, running two operating systems with a single server running Alpine Linux and Docker.
2825
A Gentle Introduction to Multithreading
Approaching the world of concurrency, one step at a time.
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A generalised solution to distributed consensus
A generalised solution to distributed consensus Howard & Mortier, arXiv’19 This is a draft paper that Heidi Howard recently shared with the world via Twitter, and here’s the accompanying …
2828
“It's done in hardware so it's cheap” (2012)
This is one of these things that look very obvious to me, to the point where it seems not worth discussing. However, I've heard the idea that "hardware magically makes things cheap" from several PhDs over the years. So apparently, if you aren't into hardware, it's not obvious at all.
2829
Keeping CALM: when distributed consistency is easy
Keeping CALM: when distributed consistency is easy Hellerstein & Alvaro, arXiv 2019 The CALM conjecture (and later theorem) was first introduced to the world in a 2010 keynote talk at PODS. Beh…
2830
JVM Anatomy Quarks: Compressed References
"JVM Anatomy Quarks" is the on-going mini-post series, where every post is describing some elementary piece of knowledge about JVM. The name underlines the fact that the single post cannot be taken in isolation, and most pieces described here are going to readily interact with each other.
2831
The sad state of font rendering on Linux
As it turns out, font rendering is a highly controversial topic. If you don’t see anything wrong with Linux font rendering, please disregard this as a shitpost. Thanks.
2832
How I'm still not using GUIs in 2019: A guide to the terminal
Hot takes and cold truths on software, startups, and the lies we tell ourselves.
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Hyperscan: A Fast Multi-Pattern Regex Matcher for Modern CPUs
I’m pleased to report that Hyperscan, the regular expression matcher that ate my life from 2008 through 2018, finally has a paper (pdf) – it’s being presented this week at NSDI &#…
2834
Notes on the Amazon Aurora Paper
This is my notes on the paper: Amazon Aurora: Design Considerations for High Throughput Cloud-Native Relational Databases.
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The Unscalable, Deadlock-Prone, Thread Pool
Paul Khuong's personal blog. Some Lisp, some optimisation, mathematical or computer.
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Linux Problems on the Desktop (2018)
In this regularly but rarely updated article, which is without doubt the most comprehensive list of Linux distributions' problems on the entire Internet, we only discuss their main problems and shortcomings (which may be the reason why some people say Linux distros are not ready for the desktop) while everyone should…
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AWS API Performance Comparison: Serverless vs. Containers
A performance comparison between three different methods of deploying an API on AWS
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Flavors of SIMD
If you like this blog, you should follow it via RSS and read older posts . Here are the recent posts:
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Cache Eviction: When Are Randomized Algorithms Better Than LRU? (2014)
Once upon a time, my computer architecture professor mentioned that using a random eviction policy for caches really isn't so bad. That random eviction isn't bad can be surprising — if your cache fills up and you have to get rid of something, choosing the least recently used (LRU) is an obvious choice, since you're…
2841
AWS Nitro System
At Tuesday Night Live with James Hamilton at the 2016 AWS re:Invent conference, I introduced the first Amazon Web Services custom silicon. The ASIC I showed formed the foundational core of our second generation custom network interface controllers and, even back in 2016, there was at least one of these ASICs going…
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LD_PRELOAD: The Hero We Need and Deserve
A summary of my undying love for LD_PRELOAD.
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Cache tables
Hash tables are the most popular probabilistic data structure, by quite a margin. You compute some hash code then compute an array index from that hash code. If you’re using open addressing-c…
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Exposing the Wayland lie (2018)
Hi, people of the future! Did you know that I wrote a follow-up article to this one, called “Further Thoughts on Wayland”? This original article was written in a more combative tone tha…
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Faster remainders when the divisor is a constant: beating compilers & libdivide
Not all instructions on modern processors cost the same. Additions and subtractions are cheaper than multiplications which are themselves cheaper than divisions. For this reason, compilers frequently replace division instructions by multiplications. Roughly speaking, it works in this manner. Suppose that you want to…
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Debugging Emacs, or How I Learned to Stop Worrying and Love DTrace (2018)
For some time Elfeed was experiencing a strange, spurious failure. Every so often users were seeing an error (spoiler warning) when updating feeds: “error in process sentinel: Search failed.” If you use Elfeed, you might have even seen this yourself. From the surface it appeared that curl, tasked with the…
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Full-system dynamic tracing on Linux using eBPF and bpftrace
How do you debug an application, library or an entire system with multiple processes? One answer: tracing. An introduction into bpftrace, and an overview of the Linux tracing ecosystem (DTrace, eBPF, uprobes, etc).