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New
The latest blog posts to take off on Hacker News. 6,947 posts.
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Learning from OpenBSD can make computers marginally less horrible
telegra.ph/why-openbsd-is-marginally-less-horrible-12-052019220 points127 commentsSystems & Performance details
The following document is an attempt to consolidate down a number of threads spanning separate discussions from around the 'net I have been having on the subject of operating system development models and OpenBSD. I will break up this document into several sections each of which will handle separate pillars of my…
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FUSE for macOS is no longer open source
And what that means for the rest of us.
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ZedRipper: A 16-core Z80 laptop
Meet the ZedRipper – a 16-core, 83 MHz Z80 powerhouse as portable as it is impractical. The ZedRipper is my latest attempt to build a fun ‘project’ machine, with a couple of goals in mind:
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Formatting Is Unreasonably Expensive for Embedded Rust
As a (late) part of the #rust2020 request, I wanted to talk about one of the paper-cuts that has become decently problematic for new and experienced users of Embedded Rust: The size costs of formatting in Rust today are unreasonably expensive for users of Rust on bare metal embedded systems. In particular there are…
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O(n^2), again, now in Windows Management Instrumentation
I recently hit some multi-minute delays on my workstation. After investigating I found that the problem was due to a lock being held for five minutes, and during that time the lock-holder was mostl…
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Why databases use ordered indexes but programming uses hash tables
I think it is safe to state that hash tables (e.g. maps in Go, dicts in Python, HashMap in Java, etc.) are far more common than ordered data structures such as trees for in-memory data structures. One data point is that in a talk about C++ hash table optimization at Google ( available in Abseil ), the speaker noted…
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An amusing story about a practical use of the null garbage collector
The computer itself ceases to exist.
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The Go runtime scheduler's way of dealing with system calls
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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File systems unfit as distributed storage back ends: 10 years of Ceph
This paper is by Abutalib Aghayev (Carnegie Mellon University), Sage Weil (Red Hat Inc.), Michael Kuchnik (Carnegie Mellon University), Mar...
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Is Arm ready for server dominance?
AWS announced new servers with Arm-powered Graviton2 processors. How do they stack up vs. x86-powered instances, and is Arm ready for server domination?
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Proxmox VE 6.1 – Open-Source virtualization platform
Latest announcements for Proxmox.
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Instructions per cycle: AMD Zen 2 versus Intel
The performance of a processor is determined by several factors. For example, processors with a higher frequency tend to do more work per unit of time. Physics makes it difficult to produce processors that have higher frequency. Modern processors can execute many instructions per cycle. Thus a 3.4GHz processor has 3.4…
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Coming Soon: AWS Graviton2 Processor for AWS
We launched the first generation (A1) of Arm-based, Graviton-powered EC2 instances at re:Invent 2018. Since that launch, thousands of our customers have used them to run many different types of scale-out workloads including containerized microservices, web servers, and data/log processing. The Operating System Vendors…
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How I Switched to Plan 9
Hi, I’m SL . You may remember me from my classic appearances in contentious 9fans threads , or maybe you’ve read one of my books .
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Coming Soon – Graviton2-Powered General Purpose EC2 Instances
We launched the first generation (A1) of Arm-based, Graviton-powered EC2 instances at re:Invent 2018. Since that launch, thousands of our customers have used them to run many different types of scale-out workloads including containerized microservices, web servers, and data/log processing. The Operating System Vendors…
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Amazon Braket – Get Started with Quantum Computing
Nearly a decade ago I wrote about the Quantum Compute Cloud on April Fool’s Day. The future has arrived and you now have the opportunity to write quantum algorithms and to run them on actual quantum computers. Here’s what we are announcing today: Amazon Braket – A fully managed service that allows scientists…
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Oxide Computer Company: Initial boot sequence
Introducing the Oxide Computer Company!
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Thermal Testing Raspberry Pi 4
Raspberry Pi 4 just got a lot cooler! The last four months of firmware updates have taken over half a watt out of idle power and nearly a watt out of fully loaded power
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TLA+ model checking made symbolic
TLA+ model checking made symbolic Konnov et al., OOPSLA’19 TLA+ is a formal specification language (Temporal Logic of Actions) particularly well suited to reasoning about distributed algorith…
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Real hardware breakthroughs, and focusing on rustc
The Redox official website
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Raspberry Pi 4 WiFi stops working at 2560 x 1440 screen resolution
This is part of a series of posts on the design and technical steps of creating Himblick , a digital signage box based on the Raspberry Pi 4.
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64 bits ought to be enough for anybody
How quickly can we use brute force to guess a 64-bit number? The short answer is, it all depends on what resources are available. So we’re going to examine this problem starting with the most naive approach and then expand to other techniques involving parallelization. We’ll discuss parallelization at the CPU level…
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A Look at PureDarwin – An OS Based on the Open Source Core of macOS
An overview of the PureDarwin project, which is a community effort to produce a more usable version of Darwin OS, the open source base behind modern Mac OS.
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Latency/throughput tradeoffs, illustrated with coffee
You’re making morning drip coffee. You need to make 2 cups. Do you:
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Shipping a compiler every six weeks
This blog post is a slightly edited version of the live transcript of the talk I gave at RustFest 2019 in Barcelona on November 10th, 2019. As it's a transcript some parts of it are a bit repetitive or badly worded, but I hope the message behind the talk will be conveyed by this post anyway.