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The most popular blog posts about systems & performance on Hacker News. 6,942 posts.
Disclaimer: An earlier version of this post claimed the structure is wait-free, this is incorrect. Being wait-free requires that failure or suspension of any thread can’t cause failure or suspension of another thread. This queue in fact does not fulfill that requirement. The main section which discusses the wait…
Hey there! My name is Michal 0xDEADB33F Ptaszek, and I’m a software architect at Riot. Today I would like to talk about communication. But not the kind of communication you’re probably thinking of. I want to talk about the other, more exci…
Office 365 Advanced Threat Protection (Office 365 ATP) blocked many notable zero-day exploits in 2017. In our analysis, one activity group stood out: NEODYMIUM. This threat actor is remarkable for two reasons: FinFisher is such a complex piece of malware that, like other researchers, we had to devise special methods…
This post assumes some basic C skills. Linux puts you in full control. This is not always seen from everyone’s perspective, but a power user loves to be in control. I’m going to show yo…
Combining prefix search with repeated search, to accommodate multiple styles.
I think simple ultra-high speed lossy (or near-lossless) image codecs, built from the new generation of fast LZ codecs, are going to become ...
This paper presents an evaluation of the use of a high-level language (HLL) with garbage collection to implement a monolithic POSIX-style kernel. The goal is to explore if it is reasonable to use an HLL instead of C for such kernels, by examining performance costs, implementation challenges, and programmability and…
Buy an RTX 5090, the fastest consumer GPU money can buy, and you get 104.8 TFLOPS of FP32 compute. Ask it to do double-precision math and you get 1.64 TFLOPS. That 64:1 gap is not a technology limitation. For fifteen years, the FP64:FP32 ratio has been slowly getting wider on consumer GPUs, widening the divide between…
In August, we wrote about our concerted stability effort. Today, we've more than achieved our CockroachDB stability goal of running a 100-node cluster.
This blog shares the results of our performance tests creating OpenTelemetry traces with eBPF-based automatic instrumentation vs traditional instrumentation
This is basically an expanded explanation of what I did after reading this tutorial by Marwan Burelle and then sitting down and trying to write my own implementation, so the steps are going to be fairly similar. The main implementation differences are that my version is simpler and more vulnerable to memory…
I’m very excited to announce that today I’m open-sourcing atool I’ve been working on for several months at Google.It’s called Bloaty McBloatface, and it lets...
The story behind how LinkedIn created Apache Kafka
A guide to a full-featured modern desktop FreeBSD installation
I'm taking a break from debugging books to talk about a calamitous shitshow of textbook writing: Mastering C Pointers: Tools for Programming Power , by Robert J. Traister.
Porting Linux to Apple Silicon
Learn why Linux binary compatibility breaks when shipping software and what developers can do to fix real-world build and deployment issues.
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Nano How-To explaining how to setup a root file system with only emacs.
Addendum : Many Hacker News commenters correctly point out that the right way to indicate to the compiler that a value does not change is const . This post is not about C best practices, but just about how one can easily get to the bottom of this kind of surprising behavior by looking at the compiler output. This…
Sometimes programmers want to prune out characters from a string of characters. For example, maybe you want to remove all line-ending characters from a piece of text. Let me consider the problem where I want to remove all spaces (' ') and linefeed characters ('\n' and '\r'). How would you do it efficiently? size_t…
A talk on OpenBSD for beginners
