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New
The latest blog posts to take off on Hacker News. 6,949 posts.
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Java’s new garbage collector promises low pause times on multi-terabyte heaps
Java 11 features a new Garbage Collector, the Z Garbage Collector (ZGC), which is designed for very low pause times on huge multi-terabyte heaps. In this article we'll cover the motivation for a new GC, a technical overview and some of the really exciting possibilities ZGC opens up.
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A little bit of the one-time MacOS version still lingers in ZFS
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…
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How to Fit a Large Program into a Small Machine (1999)
As a rule, "sophisticated" progrmming is pretty boring - optimizing the unnecessary to speed up the uninteresting. Here, however, is an incredibly sophisticated package intended for fun and games. The more you know about software, the more astounded you will become as you read this.
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Intel microcode license updated to permit redistribution
Access technologies from partnerships with the community and leaders. Everything open source at Intel. We have a lot to share and a lot to learn.
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Jepsen: Dgraph 1.0.2
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—though we did find instances of long fork using other tests. We have re-checked Dgraph 1.0.13 with a corrected checker, and its long fork tests still pass.
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24-core CPU and I can’t type an email – part two
In my last post I promised to give more details about some rabbit holes that I went down during the investigation, including page tables, locks, WMI, and a vmmap bug. Those details are here, along …
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Bing.com now runs on .NET Core
Bing.com is a cloud service that runs on thousands of servers spanning many datacenters across the globe. Bing servers handle thousands of users’ queries every second from consumers around the world doing searches through their browsers, from our partners using the Microsoft Cognitive Services APIs, and from the…
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How to Read 100s of Millions of Records per Second from a Single Disk
This article gives an overview of the implementation and performance of two recent additions to LocustDB, an extremely fast open-source analytics database built in Rust. The first addition is suppo…
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24-core CPU and I can’t type an email
I wasn’t looking for trouble. I wasn’t trying to compile a huge project in the background (24-core CPU and I can’t move my mouse), I was just engaging in that most mundane of 21st century tasks, wr…
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Introducing the Windows Pseudo Console (ConPty)
In this, the fourth post in the Windows Command-Line series, we'll discuss the new Windows Pseudo Console (ConPTY) infrastructure and API - why we built it, what it's for, how it works, how to use it, and more.
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TinyWM – A tiny window manager in around 50 lines of C
TinyWM is a tiny window manager that I created as an exercise in minimalism. It is also maybe helpful in learning some of the very basics of creating a window manager. It is only around 50 lines of C. There is also a Python version using python-xlib.
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Understanding L1 Terminal Fault aka Foreshadow: What You Need to Know
L1 Terminal Fault/Foreshadow explained in ~three minutesFor a more detailed technical view of L1 Terminal Fault, please see this deeper dive with Jon Masters.How we got here: a brief history of modern microprocessor cachesModern computer microprocessors are complex machines, filled with many optimizations designed to…
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A Basic Just-In-Time Compiler (2015)
Monday’s /r/dailyprogrammer challenge was to write a program to read a recurrence relation definition and, through interpretation, iterate it to some number of terms. It’s given an initial term ( u(0) ) and a sequence of operations, f , to apply to the previous term ( u(n + 1) = f(u(n)) ) to compute the next term…
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Vert.x native: how to run a JVM app in 10Mb of RAM
I’ve been working with GraalVM for a while now mostly on the Polyglot aspect, but some work has been done in the native image support. Today I’d like to shar...
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Redshift – A better flux program for Linux (2014)
F.lux is a wonderful tool for helping eye strain. People who stare at computer screens all day (like myself) can experience quite a bit of eye strain due to the harsh lights screens emit. One solution is to wear yellow tinted gamer goggles. I chose the cheaper route, installing software to adjust the color temperature…
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Portability benchmark of Dota2 on MacOS
gfx-rs is a project bringing efficient cross-platform graphics to rust. This blog supposedly hosts the major milestones, concepts, and recaps of the project.
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A little bump in the wire that makes the Internet faster
My parents live in a rural area, where the usual monopolist Internet service provider provides the usual monopolist Internet service: DSL, r...
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Systemd's DynamicUser feature is currently dangerous
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…
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A timesyncd failure and systemd's lack of debugability
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…
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Unix Syscalls
On UNIX-like operating systems, userland processes invoke kernel procedures using the "syscall" feature. Each syscall is identified by a "syscall number" and has a short list of parameters, which both can vary between operating systems, hardware platforms, and configuration options.
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Better slow than sorry – VirtualBox 3D acceleration considered harmful
The 3 - d acceleration feature of VirtualBox has had a bit of a rough time this year . One could argue that technically this component might not be considered attack surface in VirtualBox, due to the big warning put out in the documentation recommending against its use (emphasis mine):
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How we scaled Nginx
10 million websites, apps and APIs use Cloudflare to give their users a speed boost. At peak we serve more than 10 million requests a second across our 151 data centers. Over the years we’ve made many modifications to our version of NGINX to handle our growth. This is blog post is about one of them.
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