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A Lengthy, Pedantic Review of Ubuntu 18.04 LTS (Bionic Beaver)
The Beav in all his geometric glory. Even though I have been using some Linux distribution or another pretty much daily for roughly two decades, I...
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 458 posts.
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The ‘app’ you can’t trash: how SIP is broken in High Sierra
When you can’t remove an app which you installed just a few minutes ago, you know there’s something wrong. Here’s the solution, and why this is bad security.
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PSA: Firefox Nightly now with experimental Wayland support
As of last nightly (20181115100051), Firefox now supports Wayland on Linux, thanks to the work from Martin Stransky and Jan Horak, mostly.
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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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Remote Code Execution in Alpine Linux
tl;dr I found several bugs in apk, the default package manager for Alpine Linux. Alpine is a really lightweight distro that is very commonly used with Docker...
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Pipelines – a guided tour of the new IO API in .NET
Pipelines - a guided tour of the new IO API in .NET, part 1 (part 2 here) About two years ago I blogged about an upcoming experimental IO ...
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Rules of optimization
Rules of optimization: 1) Design for performance from day 1 2) Profile often 3) Be vigilant on performance regressions 4) Understand the data 5) Understand the HW 6) Help the compiler 7) Verify your assumptions Performance is everyone's responsibility https://t.co/CwwJffnHGz
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Why you can have millions of goroutines but only thousands of Java threads
Many seasoned engineers working in JVM based languages have seen errors like this: [error] (run-main-0) java.lang.OutOfMemoryError: unable to create native thread: [error] java.lang.OutOfMemoryError: unable to create native thread: [error] at java.base/java.lang.Thread.start0(Native Method) [error] at…
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Serverless: Cold Start War
Comparison of cold start statistics for FaaS across AWS, Azure and GCP
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Inside the Windows Console
Welcome to the third post in the Windows Command-Line series. In this post, we'll start to dig into the internals of the Windows Console and Command-Line, what it is, what it does ... and what it doesn't do!
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Systemd is bad parsing
Systemd has a remotely exploitable bug in its DHCPv6 client . That means anybody on the local network can send you a packet and take control...
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C Portability Lessons from Weird Machines
In this article we’ll go on a journey from 4-bit microcontrollers to room-sized mainframes and learn how porting C to each of them helped people separate the essence of the language from the environment of its birth. I’ve found technical manuals and videos for this article to help bring each computer to life.
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Raspberry Pi microSD card performance comparison
Back in 2015, I wrote a popular post comparing the performance of a number of microSD cards when used with the Raspberry Pi. In the intervening three years, the marketplace hasn't changed a ton, but there have been two new revisions to the Raspberry Pi (the model 3 B and just-released model 3 B+). In that article, I…
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Bpftrace for Linux 2018
bpftrace (DTrace 2.0) for Linux 2018: the bpftrace front-end
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Wendelstein 7-X achieves world record
In the past experimentation round Wendelstein 7-X achieved higher temperatures and densities of the plasma, longer pulses and the stellarator world record for the fusion product. Moreover, first confirmation for the optimisation concept on which Wendelstein 7-X is based, was obtained. Wendelstein 7-X at Max Planck…
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OpenBSD on a Laptop
A guide to a secure and streamlined installation of OpenBSD 6.4 on a laptop.
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Scaling Kubernetes to 2,500 Nodes
Stay up to speed on the rapid advancement of AI technology and the benefits it offers to humanity.
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Spectre and the end of langsec
wingolog: article: spectre and the end of langsec
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Why Is It Taking 20 Minutes to Mine This Bitcoin Block?
You have just made a Bitcoin transaction and you are eager to see if it appears in the next block. You know that the expected time between Bitcoin blocks is 10 minutes. You check the log of your Bitcoin node. It has been 7 minutes since the previous block. You recall that blocks occurrences in Bitcoin are a Poisson…
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Apps for which macOS applies compatibillity fixes
What do Photoshop, Matlab, Panic Transmit, and Eclipse have in common? They are among the 299 apps for which macOS applies compatibillity fixes.
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Into the Borg – SSRF inside Google production network
Intro - Testing Google Sites and Google Caja In March 2018, I reported an XSS in Google Caja, a tool to securely embed arbitrary html/javascript in a webpage. In May 2018, after the XSS was fixed, I r
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Real-Time Noise Suppression Using Deep Learning
Imagine waiting for your flight at the airport. Suddenly, an important business call with a high profile customer lights up your phone. Tons of background noise clutters up the soundscape around you…
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PostgreSQL Features You May Not Have Tried but Should
pgDash is an in-depth monitoring solution designed specifically for PostgreSQL deployments. pgDash shows you information and metrics about every aspect of your PostgreSQL database server, collected using the open-source tool pgmetrics.
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