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PCI Express on the Raspberry Pi 4
After the daily dose of Hackaday - and with an idea that seemed very doable, and actually, with some improvements can be easily reproducible.
New
The latest blog posts to take off on Hacker News. 498 posts.
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Amazon Aurora PostgreSQL Serverless
The database is usually the most critical part of a software architecture and managing databases, especially relational ones, has never been easy. For this reason, we created Amazon Aurora Serverless, an auto-scaling version of Amazon Aurora that automatically starts up, shuts down and scales up or down based on your…
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Linux 5.2 released: list of changes
List of changes and new features merged in the Linux kernel during the 5.2 development cycle
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So you think you know C? (2016)
It's a C test. If you think you know C, take this test. It only has 5 questions.
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FreeBSD – A lesson in poor defaults
This page lists some of the changes I make to a vanilla install of FreeBSD for security hardening. Some changes to increase network performance or make things a bit more sane are also included. It only covers basic changes that a sysadmin can make to a running system.
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It rather involved being on the other side of this airtight hatchway
Not every code injection bug is a security hole.
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The Day “/Proc” Died
Solaris'd... This morning I got an email from our group manager asking about a UNIX server...
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It’s Time for a Modern Synthesis Kernel
I had a student (Fred Smith) who worked on extensions to Popcorn (the predecessor to Cyclone) that supported run-time code generation in a lightweight fashion. Here’s a paper describing part of the system: https://ecommons.cornell.edu/handle/1813/5812 . Fred’s thesis had a bunch more.
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Cloudflare outage caused by bad software deploy
Starting at 1342 UTC today we experienced a global outage across our network that resulted in visitors to Cloudflare-proxied domains being shown 502 errors (“Bad Gateway”). The cause of this outage was deployment of a single misconfigured rule within the Cloudflare Web Application Firewall (WAF)
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Mistakes we made adopting event sourcing and how we recovered
Good judgement is the result of experience ... Experience is the result of bad judgement. — Fred Brooks
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Network Transparency with Wayland
M. Stoeckl's website
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NetBSD on the last G4 Mac mini and making the kernel power failure proof
(First, as a public service message, if you're running Linux on a G5 you may wish to update the kernel .) I'm a big fan of NetBSD . I've ru...
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Machine learning systems are stuck in a rut
Machine learning systems are stuck in a rut Barham & Isard, HotOS’19 In this paper we argue that systems for numerical computing are stuck in a local basin of performance and programmabil…
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CUDA Grep
CUDA grep : Manish and Brandon's 15418 final project
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Introducing people.kernel.org
Ever since the demise of Google+, many developers have expressed a desire to have a service that would provide a way to create and manage...
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Avoid Indirection in Code
I often see code where authors abstract away details by placing them in some external function. Here is a toy example:
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PulseAudio Under the Hood (2017)
I’m working on the Roc Toolkit open-source project, a development kit for realtime audio streaming over the network. You can read more about the project in these two articles: 1, 2. We decided to implement a set of PulseAudio modules that will allow PulseAudio to use Roc as a network transport. Many Linux distros…
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FPGAs Have the Wrong Abstraction for Computing
Verilog is the de facto abstraction for programming today’s FPGAs. RTL programming is fine if you want to use FPGAs for their traditional purpose as circuit emulators, but it’s not the right thing for the new view of FPGAs as general-purpose computational accelerators.
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Avoiding Instruction Cache Misses
Excessive instruction cache misses are the kind of a performance problem that's going to appear only in larger codebases. In this article, I'm describing some ideas on how to deal with this issue.
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Learning to Build Distributed Systems
A common question I get at work is “how do I learn to build big distributed systems?”. I’ve written replies to that many times. Here’s my latest attempt.
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You are not Google. You are not Netflix
You are also not Spotify, Amazon, Apple, Microsoft, Facebook or one of several other big tech companies I could mention here. If I have excluded anybody reading this - I am sorry.Maybe you will still enjoy the read. For everyone else: This article is probably for you. To give you...
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Why Monzo's bank transfers weren't working on the 30th of May
A technical problem at the company we use to connect to Faster Payments caused issues with bank transfers. To fix it, we’re bringing everything in-house instead.
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Debian Riscv64 port in mid 2019
It's been a while since last post (Talk about the Debian GNU/Linux riscv64 port at RISC-V workshop), and sometimes things look very quiet from outside even if the people on the backstage never stop working. So this is an update on the status of this port before the release of buster, which should happen in a few weeks…
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DPAPI security flaw in Windows 10
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