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The most popular blog posts about systems & performance on Hacker News. 6,943 posts.
Many groups are working on running sql queries in incremental/streaming systems . Query planning in this context is not a well understood problem. This post is a quick pointer towards the many open problems. It's not intended to be complete or authoritative, because I haven't engaged with the problem much beyond…
I recently wrapped up a fun paper with my coauthors Ben Fish, Adam Lelkes, Lev Reyzin, and Gyorgy Turan in which we analyzed the computational complexity of a model of the popular MapReduce framework. Check out the preprint on the arXiv. Update: this paper is now published in the proceedings of DISC2015. As usual I’ll…
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…
I regularly hear or read statements like this: “X is slow but this is to be expected because it needs to do a lot of work”. It can be said about an application or a component in a larger system, and can refer to other resources that aren’t time. I often find these profoundly unhelpful as they depend much more on the…
In computing, the terms big endian and little endian refer to the order in which a value's bytes are stored in memory: with the most significant (big) or least significant (little) part first.
Continuing this week’s “making an article so I don’t have to keep typing it” ZFS series… here’s why you should stop using RAIDZ, and start using mirror vdevs instead.
Index A tiny ABI An ABI to appease the linker Catching what you throw Magic around __cxa_begin_catch and __cxa_end_catch Gcc...
You're probably reading this page because you've attempted to access some part of my blog (Wandering Thoughts) or CSpace , the wiki thing it's part of. Unfortunately you're using a browser version that my anti-crawler precautions consider suspicious, most often because it's too old (most often this applies to versions…
At work we recently started using the MQTT protocol, which uses a publish / subscribe model. It’s simple in the good way and well thought out. We went with an open source implementation named…
I’ve seen a lot of poorly implemented spinlocks floating around the internet.
The biggest sea change in software development since the OO revolution is knocking at the door, and its name is Concurrency.
Hamidreza Soleimani's Blog - Just about what I know
Made in Notion, the connected workspace where AI agents and teams organize docs, projects and knowledge together.
People pick languages differently with LLMs.
On the 3rd of August 2016, an Emirates Boeing 777 landing in Dubai attempted a last second go-around after touching down too far along the…
You're probably reading this page because you've attempted to access some part of my blog (Wandering Thoughts) or CSpace , the wiki thing it's part of. Unfortunately you're using a browser version that my anti-crawler precautions consider suspicious, most often because it's too old (most often this applies to versions…
A practical walk-through of a fixed-width uint128 implementation in modern C++.
Where Flow-based Programming stands after 50 years since its introduction. What problems it solves today. And what problems it can solve tomorrow for broader Software Engineering industry
Last week, during Tomas ' keynote at MySQL Percona Live Conference in London we announced as one of "previews" of the following MySQL 5.7 release(s) -- an over 1,000,000 Query/sec result obtained with InnoDB Memcached plugin on a Read-Only workload. This article here is just to confirm the announced results without…
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…
Tailscale on iOS runs as a special kind of app, a Network Extension. This lets us run in the background, so we can secure traffic from all of your applications, without them having to change anything. But with this power comes a memory straightjacket. Normal iOS apps can use 5GB or so of memory before iOS kills them…
2019-04-10: The long fork test used in this analysis contained a bug which caused it to (in many cases) fail to identify long fork anomalies. We have re-checked YugaByte DB 1.1.15.0-b16 with a corrected checker, and its long fork tests still pass.
In this post, we’ll look at the new loading attribute which brings native <img> and <iframe> lazy-loading to the web!. For the curious, here’s a ...
With the new C++11 Standard, C++ faces the first time challenges of multicore architectures. The 2011 published standard defines how a C++ program has to behave in the presence of multiple threads. The C++11 multithreading capabilities are composed of two components. This is, on the one hand, the defined memory model…
