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The most popular blog posts about systems & performance on Hacker News. 498 posts.
Last month, I sat down and decided to at the very least attempt to fix our XHCI (USB 3 host controller) bus driver. Issues with it have been the most significant problem users have been facing, as most hardware made post-2012 has an XHCI chip as the …
Jonathan Blow of “The Witness” fame likes to talk about just typing the obvious code first. Usually it will turnout to be fast enough. If it doesn’t, you c...
A stopwatch and a race against time.
Our servers manage heaps of network packets, from legit traffic to big DDoS attacks. For top efficiency, we adopted eXpress Data Path (XDP), a Linux kernel tool for swift, low-level packet handling.
The performance of a processor is determined by several factors. For example, processors with a higher frequency tend to do more work per unit of time. Physics makes it difficult to produce processors that have higher frequency. Modern processors can execute many instructions per cycle. Thus a 3.4GHz processor has 3.4…
A realtime server for the modern web
foobartel Ltd. - Web Design & Development
Serial Number of First Unix System In preparation for a talk on Seventh Edition Unix this fall, I stumbled upon a service list from DEC fo...
YugabyteDB 2.0 released. Read to learn about production-ready YSQL, performance benchmarks, Jepsen results, and Beta feature previews
2019-09-05: YugaByte’s blog post states YugaByte DB “passes Jepsen tests”. We feel obligated to state that YugaByte DB’s Jepsen test suite does not pass, though it may in the future. Race conditions in YugaByte DB’s schema system can cause correctness errors. For example, inserting rows into a freshly-created table…
Linux uses dm-crypt in order to provide transparent disk or partition encryption. What are the options in case you need to recover passphrase from such encryption? There are already ready-made tools, but we have also produced and published our own in order to support newer LUKS format/ciphers/hashing.
Over the past year I've been working on a minimal-dependency hobbyist computing stack (everything above the processor) called Mu . The goal is to:
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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…
Teaching rigorous distributed systems with efficient model checking Michael et al., EuroSys’19 On the surface you might think today’s paper selection an odd pick. It describes the labs enviro…
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In this article we will put some light on a lot of tools used in the world of Unix desktop environment customization, particularly regarding wmctrl, wmutils, xev, xtruss, xwininfo, xprop, xdotools, xdo, sxhkd, xbindkeys, speckeysd, xchainkeys, alttab, triggerhappy, gTile, gidmgr, keynav, and more. If those don't make…
A comparison of ideas behind Dynamo and Cassandra
Dash knows your context, your team, and your work, so your team can stay organized, easily find and share knowledge, and keep projects secure, all from one place.
When you invoke a function in an imperative programming language, you pass arguments to that function. But that function may also operate on global mutable state, meaning there are other factors in the operation of that function than merely the arguments you pass to it. To some extent this kind of contextual, implicit…
The Pixelbook and four other fairly new Chromebooks have the special flag to enable GPU acceleration, making these the first to get the new feature for Linux. This should bring the Android emulator and improved gaming capabilities to Project Crostini.
In this post, I’m going to go through the process of setting up Apple’s A/UX on a Quadra 610. It’s been a long time in the making - I think I had the hardware for nearly a year before I finally got A/UX running properly!
You are also not Spotify, Amazon, Apple, Microsoft, Facebook or one of several other big tech companies I could mention here. If I have excluded anybody reading this - I am sorry.Maybe you will still enjoy the read. For everyone else: This article is probably for you. To give you...
Years ago I worked in the Xbox 360 group at Microsoft. We were thinking about releasing a new console, and we thought it would be nice if that console could run the games of the previous console. E…
List of changes and new features merged in the Linux kernel during the 5.2 development cycle
