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The future of latency profiling in Go
The roadmap for latency profiling in Go
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The latest blog posts to take off on Hacker News. 498 posts.
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Hanging S3 downloads
Large downloads work from all other servers, but fail from S3. Must be a problem on their end, right?
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Don’t run this on any system you expect to be up they said, but we did it anyway
This is the story of how we upgraded over 2000 Ubuntu production servers – turning over millions an hour – by installing the operating system in memory, wiping the root disk and reinstalling the OS back on disk from RAM. We did it, there was zero data loss and it saved us lots of time and...
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Terminal and shell performance
There’s a great MSR demo from 2012 that shows the effect of latency on the experience of using a tablet . If you don’t want to watch the three minute video, they basically created a device which could simulate arbitrary latencies down to a fraction of a millisecond. At 100ms (1/10th of a second), which is typical of…
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Fastest Way to Delete Large Folders in Windows (2015)
The common way of deleting files and folders in Windows is via Windows Explorer (a.k.a. File Explorer ). This method is perfectly acceptable under normal circumstances, but becomes a real drag when dealing with large and complex folder structures. There is, in fact, a significant amount of of overhead when you trigger…
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Go's work-stealing scheduler
Deep dive into how scheduler works
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What is Eventual Consistency?
On this post we're going to talk about Eventual Consistency in the context of lock-free and wait-free data structures, with focus on the C++...
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OpenBSD on the Huawei MateBook X
The Huawei MateBook X is a high-quality 13" ultra-thin laptop with a fanless Core i5 processor. It is obviously biting the design of the Apple 12" MacBook , but it does have some notable improvements such as a slightly larger screen, a more usable keyboard with adequate key travel, and 2 USB-C ports.
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A deep dive into Multicore OCaml garbage collector
I recently gave a talk on the internals of multicore OCaml GC at Jane Street offices in NYC. The slides from the talk are available online . But I felt that the slides alone aren’t particularly edifying. This post is basically the slides from the talk annotated with notes.
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50 days of postmarketOS
We are fed up with Android's endless forks! Fifty days ago I have announced postmarketOS, a touch-optimized, pre-configured Alpine Linux , which can be installed on smartphones. It avoids Android's bad habit of forking software for every single device (!) entirely by going the other way around and unifying as much as…
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How CircleCI Processes 4.5M Builds per Month
Discover the tech stack used by CircleCI. Explore 34 tools across 4 categories.
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ZFS Is the Best Filesystem For Now
ZFS should have been great, but I kind of hate it: ZFS seems to be trapped in the past, before it was sidelined it as the cool storage project of choice; it's inflexible; it lacks modern flash integration; and it's not directly supported by most operating systems. But I put all my valuable data on ZFS because it…
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27000 errors in the Tizen operating system
This article will demonstrate that during the development of large projects static analysis is not just a useful, but a completely necessary part of the development process. This article is the first...
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Avery’s laws of Wi-Fi reliability
Hello everyone! After many years of using a massively hacked-up version of dcoombs's NITLog page generator to host these pages, I've become,...
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How Discord Scaled Elixir to 5M Concurrent Users
Discover the latest news and app updates, stories, company insights, and plenty more about Discord, all in one place.
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Fedora 26 released
[This message comes from the desk of the Fedora Project Leader directly. Happy release day! — Ed.] Hi everyone! I’m incredibly proud to announce the immediate availability of Fedora 26. Read more below, or just jump to download from: Get Fedora 26 Workstation Get Fedora 26 Server Get Fedora 26 Atomic Host ← includes…
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Toward a Reasonably Secure Laptop
It’s no secret that hardware selection is one of the biggest hurdles Qubes users face. Finding a computer that is secure, trustworthy, and compatible is more difficult than it should be. In an effort to address the compatibility aspect of that problem, we introduced the Qubes-certified ...
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Ubuntu now available from the Windows store
Today, we’re excited to announce that Canonical’s Ubuntu Linux Distro is now available in the Windows Store and can be downloaded and installed on any
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OpenBSD and the modern laptop
Did you think that OpenBSD is suitable only for firewalls and high-security servers? Think again. Here are my steps to transform a modern m...
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Unikernels are secure
Per Buer is the CEO of IncludeOS . IncludeOS is a clean-slate unikernel written in C++ with performance and security in mind. Per Buer is the founder and previous CEO/CTO of Varnish Software.
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24-core CPU and I can’t move my mouse
This story begins, as they so often do, when I noticed that my machine was behaving poorly. My Windows 10 work machine has 24 cores (48 hyper-threads) and they were 50% idle. It has 64 GB of RAM an…
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Linux tracing systems and how they fit together
Linux tracing systems & how they fit together
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Pillow-SIMD – Fast, production-ready image resize for x86
Learn how Uploadcare engineers found out how to resize images on Intel processors faster than Intel itself
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Pruning spaces from strings quickly on ARM processors
Suppose that I give you a relatively long string and you want to remove all spaces from it. In ASCII, we can define spaces as the space character (' '), and the line ending characters ('\r' and '\n'). I am mostly interested in algorithmic and performance issues, so we can simplify the problem by removing all ……
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I found a bug in Intel Skylake processors
Instructors of “Introduction to programming” courses know that students are willing to blame the failures of their programs on anything. Sorting routine discards half of the data? “That might be a Windows virus!” Binary search always fails? “The Java compiler is acting funny today!” More experienced programmers know…
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Nuts and Bolts of Multithreaded Programming (2011)
Access technologies that use data for modern code, machine learning, big data, analytics, networking, storage, servers, cloud, and more.
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Writing a NetBSD kernel module
Kernel modules are object files used to extend an operating system’s kernel functionality at run time .
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Exactly-once Semantics: How Kafka Does it
Exactly-once is a hard problem to solve, but we've done it. Available now in Apache Kafka 0.11, exactly-once semantics.