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Two Objects Not Namespaced by the Linux Kernel (2017)
Covers two Linux primitives that are not namespaced by the current set of Linux kernel namespaces.
Top posts
Every blog post that took off on Hacker News, ranked by the votes of its best submission. 458 posts.
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Linux Raw Sockets
Recently I did a userspace implementation of the Host Identity Protokoll (HIPv2, RFC 7401) with the upcoming Diet Exchange (HIP DEX, IETF draft 6) . Doing so, I've learnt a lot about raw socktet programing under Linux and here I want to share a few things with you.
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Improved code caching
Starting with Chrome 66, V8 caches more (byte)code by generating the cache after top-level execution.
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Available on Google Cloud: Intel Optane DC Persistent Memory
In-memory workloads continue to be the backbone of innovative data management use cases, but as demand increases, so does the need for even larger memory capacity. In July, we announced a partnership with Intel and SAP to offer GCP virtual machines supporting Intel® Optane DC™ persistent memory for SAP workloads. This…
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Emulate Mac OS 9 with QEMU
(Updated Dec 11, 2018)
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OpenZFS vs. Btrfs and other file systems (2017)
Michael Dexter returns to update his blog post on the different file systems and details some key developments that are unfolding. He covers what's being added to these respective file systems: OpenZFS, Btrfs, and bcachefs. Michael Dexter has invested his volunteer time and career in Open Source hypervisors and file…
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Look ma, no locks
We describe a systematic approach for replacing locks with tasks. In this approach thread blocking is replaced by properly scheduling of tasks.
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About ZFS Performance
You likely know I like the ZFS filesystem a lot. ZFS stores the files in B-trees in a similar fashion as InnoDB stores data.
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Stateful Experiments on AWS Lambda
In January 2017, we presented results to the European Commission on a FP7project called SyncFree, where we were tasked with a large-scale evaluationof the Lasp programming system. In this evaluatio...
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Should you Rust in embedded yet?
A transcript of the talk I given in 2018 about the state of embedded programming in Rust.
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Programming the Linux Framebuffer
Previously , I installed Linux on a small ARM Chromebook and set it up without X.Org, using only the console. After neglecting that machine for quite some time, I came back to it because I wanted to try some pixel-graphics programming and the framebuffer seemed like it might be an easy target.
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Kernel RCE in iOS/macOS with ICMP
Today, GitHub code scanning has all of LGTM.com’s key features—and more! The time has therefore come to announce the plan for the gradual deprecation of LGTM.com.
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Fixing bufferbloat on your home network with OpenBSD 6.2 or newer
My home network (which is also my work network) is a standard-issue Comcast cable hookup. In spite of a tolerable 120 megabits down, my experience of daily Internet use is regularly frustrating. Video streams and video chats drop in quality...
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Spectre Mitigations in Microsoft's C/C++ Compiler
This form of Spectre can be used to attack a broad range of software -- operating systems, device drivers, web APIs, database systems, and almost anything else that receives untrusted input and may run on the same computer as untrusted code. Because large programs can contain literally millions of conditional branches…
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Introducing Zink: OpenGL on Vulkan
For the last month or so, I’ve been playing with a new project during my work at Collabora, and as I’ve already briefly talked about at XDC 2018, it’s about time to talk about it to a wider audience.
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Clive OS: Go applications that can run without an operating system (2016)
Removing (most of) the software stack from the cloud Clive is an operating system designed to work in distributed and cloud computing environments. It’s main design guidelines are: Ther…
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However improbable: The story of a processor bug
Processor problems have been in the news lately, due to the Meltdown and Spectre vulnerabilities. But generally, engineers writing software assume that computer hardware operates in a reliable, well-understood fashion, and that any problems lie on the software side of the software-hardware divide.
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Geosharded Recommendations with Hilbert Curve at Tinder
We’re on a mission to keep the magic of human connection alive. Learn more about life at Tinder and the many ways we're igniting our impact—for our employees and the millions of people seeking connection on our app.
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Paxos derived
Lamport's fault-intolerant state machine replication algorithm In 1978, Lamport published his classic "Time, Clocks, and the Ordering of E...
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Oboe: A C++ library for low latency audio in Android
This week we released the first production-ready version of Oboe - a C++ library for building real-time audio apps. Oboe provides the lowest possible audio latency across the widest range of Android devices, as well as several other benefits.
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Booting Windows NT 4 on a DEC Multia
The Multia feels to me like Digital’s take on a high-end “legacy-free” (at introduction in late 1994) desktop. Its spec sheet includes features unheard of in its contemporaries:
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How Algolia Built Their Realtime Search as a Service
Algolia started out as a mobile SDK for apps that wanted better offline search. After customers starting asking for a hosted search product, they quic
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I.MX7 M4 Atomic Cache Bug
Hardware Bugs can be frustrating, as they are likely the last place you would expect a bug. Unfortunately, they can and do happen. Most likely every CPU has a list of erratas. This post outlines th…
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DragonFly BSD 5.2
DragonFly version 5.2 brings Meltdown/Spectre mitigation, significant improvements to HAMMER2, ipfw, and graphics acceleration. 5.2.1 includes a fix for CVE-2018-8897 , and 5.2.2 includes a fix for the LazyFP bug, CVE-2018-3665 .