Go Scheduler
Go Scheduler Contents Introduction Compilation and Go Runtime Primitive Scheduler Scheduler Enhancement GMP Model Program Bootstrap Creating a Goroutine Schedule Loop Finding a Runnable Goroutine Goroutine Preemption Handling System Calls Network I/O and File I/O How netpoll Works Garbage Collector Common Functions Go Runtime APIs Disclaimer This blog post primarily focuses on Go 1.24 programming
xz-backdoor.md FAQ on the xz-utils backdoor (CVE-2024-3094) This is a living document. Everything in this document is made in good faith of being accurate, but like I just said; we don't yet know everything about what's going on. Update: I've disabled comments as of 2025-01-26 to avoid everyone having notifications for something a year on if someone wants to suggest a correction. Folks are free to
Go: A Documentary
The historical release notes may helpful for general information: doc/go1release Go Release History doc/go1prerelease Pre-Go 1 Release History doc/go0release Weekly Release History (Before Go 1) Language Design General design/go0initial Rob Pike, Robert Griesemer, Ken Thompson. The Go Annotated Specification. Mar 3, 2008. design/go0spec0 The Go Programming Language. Language Specification. Mar 7,
GitHub - modelcontextprotocol/servers: Model Context Protocol Servers
Official integrations are maintained by companies building production ready MCP servers for their platforms. 21st.dev Magic - Create crafted UI components inspired by the best 21st.dev design engineers. 2slides - An MCP server that provides tools to convert content into slides/PPT/presentation or generate slides/PPT/presentation with user intention. ActionKit by Paragon - Connect to 130+ SaaS inte
Linus Torvalds says Rust is coming to the Linux kernel
Maintainer lack of familiarity won't be an issue, chief insists, citing his own bafflement when faced with Perl At The Linux Foundation's Open Source Summit in Austin, Texas on Tuesday, Linus Torvalds said he expects support for Rust code in the Linux kernel to be merged soon, possibly with the next release, 5.20. At least since last December, when a patch added support for Rust as a second langua
TLDR; Software development, as it has been done for decades, is over. LLM coding tools have changed it fundamentally for the better or worse. “Talk is cheap. Show me the code.” — Linus Torvalds, August 2000 When Linus Torvalds, the creator of Linux, made this quip in response to a claim about a complex piece of programming in the Linux kernel, [1] I was an oblivious, gangly, fledgling teenage n00b
# OverviewIn this post I will use a simple HTTP benchmark to do a head-to-head performance comparison between the Linux kernel's network stack, and a kernel-bypass stack powered by DPDK. I will run my tests using Seastar, a C++ framework for building high-performance server applications. Seastar has support for building apps that use either the Linux kernel or DPDK for networking, so it is the per
Posted on Monday, April 1, 2024. Updated Wednesday, April 3, 2024. Over a period of over two years, an attacker using the name “Jia Tan” worked as a diligent, effective contributor to the xz compression library, eventually being granted commit access and maintainership. Using that access, they installed a very subtle, carefully hidden backdoor into liblzma, a part of xz that also happens to be a d
Assessing Claude Mythos Preview’s cybersecurity capabilities April 7, 2026 Nicholas Carlini, Newton Cheng, Keane Lucas, Michael Moore, Milad Nasr, Vinay Prabhushankar, Winnie Xiao Hakeem Angulu, Evyatar Ben Asher, Jackie Bow, Keir Bradwell, Ben Buchanan, David Forsythe, Daniel Freeman, Alex Gaynor, Xinyang Ge, Logan Graham, Kyla Guru, Hasnain Lakhani, Matt McNiece, Mojtaba Mehrara, Renee Nichol, A
I'm about to share a lengthy tale that begins with Apache OpenDAL™ op.read() and concludes with an unexpected twist. This journey was quite enlightening for me, and I hope it will be for you too. I'll do my best to recreate the experience, complete with the lessons I've learned along the way. Let's dive in! All the code snippets and scripts are available in Xuanwo/when-i-find-rust-is-slow TL;DR Ju
IntroductionThe complexity of graphics APIs, shader frameworks and drivers have increased rapidly during the past decades. The pipeline state object (PSO) explosion has gotten out of hands. How did we end up with 100GB local shader pipeline caches and massive cloud servers to host them? It’s time to start discussing how to cut down the abstractions and the API surface to simplify how we interact w
33 open-source cybersecurity solutions you didn’t know you needed - Help Net Security
Help Net Security newsletters: Daily and weekly news, cybersecurity jobs, open source projects, breaking news – subscribe here! Open-source cybersecurity tools provide transparency and flexibility, allowing users to examine and customize the source code to fit specific security needs. These tools make cybersecurity accessible to a broader range of organizations and individuals. In this article, yo
1 Introduction Compilers, assemblers and similar tools generate all the binary code that processors execute. It is no surprise then that these tools play a major role in security analysis and hardening of relevant binary code. Often the only practical way to protect all binaries with a particular security hardening method is to have the compiler do it. And, with software security becoming more and
Why GitHub Actually Won
A few days ago, a video produced by @t3dotgg was posted to his very popular YouTube channel where he reviews an article written by the Graphite team titled “How GitHub replaced SourceForge as the dominant code hosting platform”. Theo’s title was a little more succinct, “Why GitHub Won”. Being a cofounder of GitHub, I found Greg’s article and Theo’s subsequent commentary fun, but figured that it mi
AST vs. Bytecode: Interpreters in the Age of Meta-Compilation
233 AST vs. Bytecode: Interpreters in the Age of Meta-Compilation OCTAVE LAROSE, University of Kent, UK SOPHIE KALEBA, University of Kent, UK HUMPHREY BURCHELL, University of Kent, UK STEFAN MARR, University of Kent, UK Thanks to partial evaluation and meta-tracing, it became practical to build language implementations that reach state-of-the-art peak performance by implementing only an interprete
Version 1.108 is now available! Read about the new features and fixes from December. Release date: June 12, 2025 Security update: The following extension has security updates: ms-python.python. Update 1.101.1: The update addresses these issues. Update 1.101.2: The update addresses these issues. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome t
Recent posts: 07 Feb 2026 » Why I joined OpenAI 05 Dec 2025 » Leaving Intel 28 Nov 2025 » On "AI Brendans" or "Virtual Brendans" 22 Nov 2025 » Intel is listening, don't waste your shot 17 Nov 2025 » Third Stage Engineering 04 Aug 2025 » When to Hire a Computer Performance Engineering Team (2025) part 1 of 2 22 May 2025 » 3 Years of Extremely Remote Work 01 May 2025 » Doom GPU Flame Graphs 29 Oct 2
December 15, 2023 This article was contributed by Ronja Koistinen The gccrs project is an ambitious effort started in 2014 to implement a Rust compiler within The GNU Compiler Collection (GCC). Even though the task is far from complete, progress has been made since LWN's previous coverage, according to reports from the project. Meanwhile, another hybrid and more mature approach to GCC Rust code ge
Motivation# Around 20% of Firefox’s HTTP traffic today uses HTTP/3, which runs over QUIC, which in turn runs over UDP. This translates to substantial UDP I/O activity. Firefox uses NSPR for most of its network I/O. When it comes to UDP I/O, NSPR only offers a limited set of dated APIs, most relevant here PR_SendTo and PR_RecvFrom, wrappers around POSIX’s sendto and recvfrom. The N in NSPR stands f
Over the course of my Spring 2020 semester at Harvey Mudd College, I developed a self-hosting compiler entirely from scratch. This article walks through many interesting parts of the project. It’s laid out so you can just read from beginning to end, but if you’re more interested in a particular topic, feel free to jump there. Or, take a look at the project on GitHub. Table of contents What the pro
Introduction to Go 1.25 The latest Go release, version 1.25, arrives in August 2025, six months after Go 1.24. Most of its changes are in the implementation of the toolchain, runtime, and libraries. As always, the release maintains the Go 1 promise of compatibility. We expect almost all Go programs to continue to compile and run as before. Changes to the language There are no languages changes tha
Since I was unable to travel for a couple of years during the pandemic, I decided to take my new-found time and really lean into Rust. After writing over 100k lines of Rust code, I think I am starting to get a feel for the language and like every cranky engineer I have developed opinions and because this is the Internet I’m going to share them. The reason I learned Rust was to flesh out parts of t
No trial. No credit card required. Just your GitHub account. A year ago, I published Performance Improvements in .NET 6, following on the heels of similar posts for .NET 5, .NET Core 3.0, .NET Core 2.1, and .NET Core 2.0. I enjoy writing these posts and love reading developers’ responses to them. One comment in particular last year resonated with me. The commenter cited the Die Hard movie quote, “
I’ve become convinced that “little languages”–small languages designed to solve very specific problems–are the future of programming, particularly after reading Gabriella Gonzalez’s The end of history for programming and watching Alan Kay’s Programming and Scaling talk. You should go check them out because they’re both excellent, but if you stick around I’ll explain just what I mean by “little lan
Version 1.108 is now available! Read about the new features and fixes from December. Release date: May 8, 2025 Update: Enable Next Edit Suggestions (NES) by default in VS Code Stable (more...). Update 1.100.1: The update addresses these security issues. Update 1.100.2: The update addresses these issues. Update 1.100.3: The update addresses these issues. Downloads: Windows: x64 Arm64 | Mac: Univers
Update 1.78.1: The update addresses this security issue. Update 1.78.2: The update addresses these issues. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the April 2023 release of Visual Studio Code. There are many updates in this version that we hope you'll like, some of the key highlights include: Accessibility improvements - Better scre
Update 1.97.1: The update addresses these security issues. Update 1.97.2: The update addresses these issues. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the January 2025 release of Visual Studio Code. There are many updates in this version that we hope you'll like, some of the key highlights include: Next Edit Suggestions (preview) - Co
Sashiko
Sashiko (刺し子, literally "little stabs") is a form of decorative reinforcement stitching from Japan. Originally used to reinforce points of wear or to repair worn places or tears with patches, here it represents our mission to reinforce the Linux kernel through automated, intelligent patch review. Sashiko is an agentic Linux kernel code review system. It monitors public mailing lists to thoroughly
How a simple Linux kernel memory corruption bug can lead to complete system compromise
In this case, reallocating the object as one of those three types didn't seem to me like a nice way forward (although it should be possible to exploit this somehow with some effort, e.g. by using count.counter to corrupt the buf field of seq_file). Also, some systems might be using the slab_nomerge kernel command line flag, which disables this merging behavior. Another approach that I didn't look
[Protocol Buffers (Protobuf) is Google’s language-neutral data interchange format. See protobuf.dev.] Back in March 2020, we released the google.golang.org/protobuf module, a major overhaul of the Go Protobuf API. This package introduced first-class support for reflection, a dynamicpb implementation and the protocmp package for easier testing. That release introduced a new protobuf module with a n
The Speed of Time
Recent posts: 05 Dec 2025 » Leaving Intel 28 Nov 2025 » On "AI Brendans" or "Virtual Brendans" 22 Nov 2025 » Intel is listening, don't waste your shot 17 Nov 2025 » Third Stage Engineering 04 Aug 2025 » When to Hire a Computer Performance Engineering Team (2025) part 1 of 2 22 May 2025 » 3 Years of Extremely Remote Work 01 May 2025 » Doom GPU Flame Graphs 29 Oct 2024 » AI Flame Graphs 22 Jul 2024
PostgreSQL isn’t just a simple relational database; it’s a data management framework with the potential to engulf the entire database realm. The trend of “Using Postgres for Everything” is no longer limited to a few elite teams but is becoming a mainstream best practice. OLAP’s New Challenger In a 2016 database meetup, I argued that a significant gap in the PostgreSQL ecosystem was the lack of a s
BPFAgent: eBPF for Monitoring at DoorDash - DoorDash
As DoorDash experienced rapid growth over the last few years, we began to see the limits of our traditional methods of monitoring. Metrics, logs, and traces provide vital information about our service ecosystem. But these signals almost entirely rely on application-level instrumentation, which can leave gaps or conflicting semantics across different systems. We decided to seek potential solutions
Leaky Vessels: Docker and runc Container Breakout Vulnerabilities - January 2024 | Snyk Labs
Snyk security researcher Rory McNamara, with the Snyk Security Labs team, identified four vulnerabilities — dubbed "Leaky Vessels" — in core container infrastructure components that allow container escapes. An attacker could use these container escapes to gain unauthorized access to the underlying host operating system from within the container. Once an attacker gains access to the underlying host
Eyes Above The Waves Robert O'Callahan. Christian. Repatriate Kiwi. Hacker. Archive 2025 June Not Joking About AI Building A PC April Rakiura Northwest Circuit February Tongariro Northern Circuit 2025 January Pararaha Valley 2025 2024 December Mt Arthur/Tablelands/Cobb Valley November Queen Charlotte Track 2024 October Auckland Half Marathon 2024 Advanced Debugging Technology In Practice June Waih
AI Flame Graphs
Recent posts: 05 Dec 2025 » Leaving Intel 28 Nov 2025 » On "AI Brendans" or "Virtual Brendans" 22 Nov 2025 » Intel is listening, don't waste your shot 17 Nov 2025 » Third Stage Engineering 04 Aug 2025 » When to Hire a Computer Performance Engineering Team (2025) part 1 of 2 22 May 2025 » 3 Years of Extremely Remote Work 01 May 2025 » Doom GPU Flame Graphs 29 Oct 2024 » AI Flame Graphs 22 Jul 2024
Tier 4 Support § Support for these targets is entirely experimental. If this target is provided by LLVM, LLVM may have the target as an experimental target, which means that you need to use Zig-provided binaries for the target to be available, or build LLVM from source with special configure flags. zig targets will display the target if it is available. This target may be considered deprecated by
Linux 6.8 Network Optimizations Can Boost TCP Performance For Many Concurrent Connections By ~40% - Phoronix
Linux 6.8 Network Optimizations Can Boost TCP Performance For Many Concurrent Connections By ~40% Written by Michael Larabel in Linux Networking on 9 January 2024 at 02:23 PM EST. 76 Comments Beyond the usual new wired/wireless network hardware support and the other routine churn in the big Linux networking subsystem, the Linux 6.8 kernel is bringing some key improvements to the core networking co
By Jose Fernandez, Sebastien Dabdoub, Jason Koch, Artem Tkachuk The Compute and Performance Engineering teams at Netflix regularly investigate performance issues in our multi-tenant environment. The first step is determining whether the problem originates from the application or the underlying infrastructure. One issue that often complicates this process is the "noisy neighbor" problem. On Titus,
Improvements to static analysis in the GCC 14 compiler | Red Hat Developer
I work at Red Hat on GCC, the GNU Compiler Collection. For the last five releases of GCC, I've been working on -fanalyzer, a static analysis pass that tries to identify various problems at compile-time, rather than at runtime. It performs "symbolic execution" of C source code—effectively simulating the behavior of the code along the various possible paths of execution through it. This article summ
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xz-utils backdoor situation (CVE-2024-3094)
Code is cheap. Show me the talk.
Linux Kernel vs DPDK: HTTP Performance Showdown
research!rsc: Timeline of the xz open source attack
Claude Mythos Preview \ red.anthropic.com
Rust std fs slower than Python!? No, it's hardware!
No Graphics API — Sebastian Aaltonen
Low-Level Software Security for Compiler Developers
May 2025 (version 1.101)
ZFS Is Mysteriously Eating My CPU
Progress toward a GCC-based Rust compiler
Fast UDP I/O for Firefox in Rust
Kalyn: a self-hosting compiler for x86-64
Go 1.25 Release Notes - The Go Programming Language
Rust: A Critical Retrospective « bunnie's blog
Performance Improvements in .NET 7 - .NET Blog
Little Languages Are The Future Of Programming
April 2025 (version 1.100)
April 2023 (version 1.78)
January 2025 (version 1.97)
Go Protobuf: The new Opaque API - The Go Programming Language
Postgres is eating the database world
So You Want To Build A Browser Engine
0.10.0 Release Notes ⚡ The Zig Programming Language
Noisy Neighbor Detection with eBPF