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Frugal Computing (2021)
On the need for low-carbon and sustainable computing and the path towards zero-carbon computing.
New
The latest blog posts to take off on Hacker News. 4,389 posts.
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How Does NTP (Network Time Protocol) Work?
The Network Time Protocol (NTP) is a system for synchronizing the clocks of hosts and clients across the Internet. NTP is a protocol intended to synchronize all computers participating in the network to within a few milliseconds of Coordinated Universal Time (UTC). The core of the protocol is NTP’s clock discipline…
1834
Cardboard: a scrollable tiling window manager
After the initial learning curve, I found that Cardboard WM help me stay focused on one task and it greatly reduced how much time I spent rearranging my windows.
1835
Types of events in event-driven systems
Event-driven systems come in all sorts of shapes and sizes. The obvious commonality is; they all use events to communicate information. These events come in many shapes and sizes, and determining what goes into an event has an immense impact on the design of your system.
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Demodulation of the LTE uplink
I have been playing with some LTE recordings to brush up my knowledge, since it isn’t a protocol I’m very familiar with. I’m specially interested in understanding the structure and properties of all the pilot signals. Textbooks and documentation are great, but nothing beats getting your hands dirty with some IQ…
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What Every Programmer Absolutely, Positively Needs To Know About Encodings (2011)
If you are dealing with text in a computer, you need to know about encodings. Period. Yes, even if you are just sending emails. Even if you are just receiving emails. You don't need to understand every last detail, but you must at least know what this whole "encoding" thing is about. And the good news first: while the…
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From macOS to FreeBSD
Personal experience with moving away from Apple's world.
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The Life of MS-DOS
First released on August 12, 1981, MS-DOS became the foundation for business computing for almost two decades. This article details different versions and releases that all stemmed from Gary Kildall's QDOS.
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The Kobayashi Maru of comparing dates with times
Written pieces, talks, and other bits by Zach Holman.
1842
Prefix Sum with SIMD
In other words, the $k$-th element of the output sequence is the sum of the first $k$ elements of the input sequence.
1843
Testing Distributed Systems
Curated list of resources on testing distributed systems
1844
A decade of major cache incidents at Twitter
This is a collection of information on severe ( SEV-0 or SEV-1 , the most severe incident classifications) incidents at Twitter that were at least partially attributed to cache from the time Twitter started using its current incident tracking JIRA (2012) to date (2022), with one bonus incident from before 2012. Not…
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How PostgreSQL stores rows
poking inside postgres pages
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When an M1 Mac mini is faster than an M1 Pro: contention and core allocation
When running some tasks confined to E cores, the original M1 chip from 2020 completes them significantly quicker than an on an M1 Pro. Here’s the detail.
1850
On building 30k Debian packages
As part of my ongoing attempts to create some nice datasets for training large code models for C/C++ , I've recently been attempting to buil...
1851
Serenity OS: Interview
How would you build an operating system? My answer is I wouldn't. First off, I don't know how. And the second thing is it seems like to large of a task. It took thousands of developers to build Windows XP. But actually, it is possible to build an operating system from scratch. My guest is doing it. Andreas Kling…
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Go performance from version 1.2 to 1.18
Shows how much the performance of Go has improved from version 1.2 through to 1.18 -- in its compiler, runtime, and libraries.
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Why Not ZFS (2021)
ZFS is a hybrid filesystem and volume manager system that is quite popular recently but has some important and unexpected problems.
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Installing Every Arch Package
Using algorithms and Julia to install as many packages as possible from the Arch Linux official repositories
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The case of the mysterious --help directory (2020)
For quite some time—as my research will show, March 2016—, I have been annoyed by a directory named --help showing up in my home directory (and sometimes in others).
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How to avoid layout shifts caused by web fonts
One of the biggest causes of layout shifts for my clients is late-loading web fonts, let's look at how to optimise them!
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Reclaiming the lost art of Linux server administration
One of the skills I wish I’d learned earlier in my career is basic Linux server administration. Specifically in relation to hosting something on the web, either a web app or API that I wrote myself, or something from the thriving self-hosted community , such as WordPress. Managing servers is increasingly seen as the…
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Things we finally know about network queues (2017)
How big should your queue be, and what should you do when it fills up? Many times, we implement or even deploy a networking system before w...