1321
Handles are the better pointers (2018)
28-Nov-2018: I’ve added a small update at the end on how to prevent‘handle collisions’ with a per-slot generation counter
New
The latest blog posts to take off on Hacker News. 4,387 posts.
1322
Linux Namespaces Are a Poor Man's Plan 9 Namespaces
A blog about free software and programming
1323
Filenames and pathnames in shell: How to do it correctly (2020)
This article explains how to correctly handle filenames in Bourne shells (the primary shell of Unix/Linux/POSIX systems), based on the issues discussed in 'Fixing Unix/Linux/Filenames'. Many programs fail to work properly on filenames that include spaces, begin with dash (-), include newlines, and so on, because…
1324
Building a Networked Key-Value-Store on an FPGA
This post is about building an FPGA based networked key-value-store in the functional hardware description language Clash. I’ll describe my FPGA-tailored hashtable design, the testing framework I built for it, and its performance and resource usage.
1325
The legend of “x86 CPUs decode instructions into RISC form internally” (2020)
A dive into what x86 instruction are decoded into various processors, to determine the truth of the idea that they're just RISC-like internally.
1326
Follow up to “I booted Linux 293k times”
Well that blew up. It was supposed to be just a silly off-the-cuff comment about how some bugs are very tedious to bisect. To answer a few questions people had, here’s what actually happened.…
1327
Put an io_uring on it – Exploiting the Linux Kernel (2022)
Put an io_uring on it - Exploiting the Linux Kernel - chompie at the bits
1328
I booted Linux 293k times in 21 hours
And it only took 21 hours. Linux 6.4 has a bug where it hangs on boot, but probably only 1 in 1000 boots (and rarer if using Intel hardware for some reason). It’s surprising to me that no one…
1329
1330
Desktop Linux Hardening (2022)
Linux is not a secure desktop operating system. However, there are steps you can take to harden it, reduce its attack surface, and improve its privacy. Before we start… Some of the sections will include mentions of unofficial builds of packages like linux‑hardened, akmod, hardened_malloc, and so on. These are not…
1331
NixOS for the Impatient
Using NixOS for a more tractable computing setup.
1332
Web Apps on macOS Sonoma 14 Beta
The personal blog of Thomas Steiner
1333
“csinc”, the AArch64 instruction you didn’t know you wanted
After a long time of not publishing anything and being passive about doing any writing in this blog, I am coming back for … however many articles I can. Today I want to talk about an underrat…
1334
Linux on the Xbox 360
Hello and welcome back to The Cool Blog. I've been meaning to write more but I had these things called finals and then I had to move home for the summer and then I got addicted to Satisfactory again and yeah. Anyway I'm back and time for me to share a project of mine that I've been working on since like March.
1335
Anything can be a message queue if you use it wrongly enough
Xe Iaso's personal website.
1336
Learn x86-64 assembly by writing a GUI from scratch
Most people think assembly is only to be used to write toy programs for learning purposes, or to write a highly optimized version of a specific function inside a codebase written in a high-level language.
1337
1338
Modern CPUs have a backstage cast
If you take someone with intermediate knowledge of computing in the right areas, and ask them how an x86 machine boots, they'll probably start telling you about how the CPU first comes up in real mode and starts executing code from the 8086 reset vector of FFFF:FFF0. This understanding of how an x86 machine boots has…
1339
300ms Faster: Reducing Wikipedia's total blocking time
How two simple steps improved the responsiveness of Wikipedia's mobile site
1340
A terminal case of Linux
Has this ever happened to you? You want to look at a JSON file in your terminal, so you pipe it into jq so you can look at it with colors and stuff. That’s a useless use of cat. …oh hey cool bear....
1341
Implementing a distributed key-value store on top of implementing Raft in Go
Implementing the Raft distributed consensus protocol in Go
1342
Jails on FreeBSD
We have had Jails on FreeBSD since 4.0 came out 19 years ago in March 2000. This describes how to setup jails on FreeBSD 12 without any helpers.
1343
I didn’t learn Unix by reading all the manpages (2022)
Originally drafted as a thread on hackers.town , after Abbie Normal asked me to expand on a side comment in a discussion of documentation .
1344
1345
1346
1347
1348
Io uring
Introduced in 2019 (kernel 5.1) by Jens Axboe, io_uring (henceforth uring) is a system for providing the kernel with a schedule of system calls, and receiving the results as they're generated. Whereas epoll and kqueue support multiplexing, where you're told when you can usefully perform a system call using some set of…
1349
Memory Allocation
A visual introduction to memory allocation.
1350
How much memory do you need to run 1M concurrent tasks?
In this blog post, I delve into the comparison of memory consumption between asynchronous and multi-threaded programming across popular languages like Rust, ...