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The most popular blog posts about systems & performance on Hacker News. 6,942 posts.
Recently I encountered a bug so cute that I immediately knew that I will want to share it on my blog. It was one of those bugs that even Rust can’t save you from. It occurred in HyperQueue (HQ), a distributed task scheduler written in Rust that I work on.
Deep dive into how scheduler works
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PostgreSQL have supported Hash Index for a long time, but they are not much used in production mainly because they are not durable. Now, ...
What is a deterministic hypervisor and why do we need one anyhow?
The latest 4.13.9 source release of the Linux kernel is 780MiB, but thanks to xz compression, the download is a much more managable 96 MiB (an 88% reduction)
This is episode 5, out of a total 12, in the A Node.JS Holiday Season series from Mozilla's Identity team. For this post, we bring the discussion back to scaling ...
Assembly code scares people. There’s a good reason for that. For many people, writing code in assembly language seems equivalent to writing code in ancient dwarven runes, or calculating pi in roman numerals. The fact that RollerCoaster Tycoon was almost completely written in assembly language sounds almost too amazing…
It's not beyond possibility to set up MySQL to achieve 100,000 concurrent connections if you balance network config and use thread pools. By Vadim Tkachenko
Linux has an elegant and beautiful design when it comes to threads: threads are nothing more than processes that share a virtual address space and file descriptor table. Threads spawned by a process are additional child processes of the main “thread’s” parent process. They’re manipulated through the same process…
There's a fascinating Rust library, loom, which can be used to thoroughly test lock-free data structures. I always wanted to learn how it works. I still do! But recently I accidentally implemented a small toy which, I think, contains some of the loom's ideas, and it seems worthwhile to write about that. The goal here…
A few spy tools for your operating system (other than strace!)
On the concepts involved in a running program. What happens, exactly, when you double click an executable file, or launch it from the command line, and it begins to execute?
Moved to: https://capnproto.org/news/2014-06-17-capnproto-flatbuffers-sbe.html (GitHub Pages doesn't support 301 redirects :(.)
Performance metrics are surprisingly challenging to get right. Here we share how to create metrics that are accurate, precise, and useful!
Posted by Platform Hardening Team In Android 11 we continue to increase the security of the Android platform. We have moved to safer def...
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Justin Cormack, who worked on MirageOS back in the day, called me at the pub to talk about why unikernels are coming back. The friction that made them hard is gone, the operating system is design debt, and if you care about security you should seriously consider them.
How customer needs shaped Oxide's Kubernetes integrations.
By that I mean a delay between receiving movement data from the mouse device and rendering the on-screen cursor. The lag of a Mac OS X cursor is at least twice bigger than Windows’ cursor and yes, a human eye can surely notice that.
The MirkoPC is so far the closest thing to a full-fledged Raspberry Pi desktop computer: Based on the Compute Module 4, it has a full-size M.2 M-key slot, allowing the Pi to boot from reliable and fast NVMe SSD storage, a built-in headphone amp and line out, 4 USB 2.0 ports, gigabit Ethernet, two HDMI ports, and a…
Just say NO to Paxos overhead: replacing consensus with network ordering Li et al., OSDI 2016 Everyone knows that consensus systems such as Paxos, Viewstamped Replication, and Raft impose high over…
For some reason, nobody's written about what it takes to crawl a big chunk of the web in a while: the last point of reference I saw was Michael Nielsen's post from 2012 .
Introducing Mempodipper , an exploit for CVE-2012-0056. /proc/ pid /mem is an interface for reading and writing, directly, process memory by seeking around with the same addresses as the process's virtual memory space. In 2.6.39, the protections against unauthorized access to /proc/ pid /mem were deemed sufficient…
Floodgap has had a T1 line since I moved into this house in 2011. I'm one of those weirdos who runs my own hardware and prefers to avoid ...
