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PyPy for low-latency systems
PyPy for low-latency systems Recently I have merged the gc-disable branch, introducing a couple of features which are useful when you need...
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The latest blog posts to take off on Hacker News. 6,949 posts.
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Using TLA+ to Understand Xen Vchan
The vchan protocol is used to stream data between virtual machines on a Xen host without needing any locks. It is largely undocumented. The TLA …
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Learning KVM – implement your own kernel
Few weeks ago I solved a great KVM escaping challenge from TWCTF hosted by @TokyoWesterns . I have given a writeup on my blog: [Write-up] T...
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Even more fun with building and benchmarking Firefox with GCC and Clang
Recent switch of official Firefox builds to Clang on all platforms has triggered some questions about the quality of code produced by GCC c...
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It is fast or it is wrong
Fast programs are always fast, slow programs are slow even on a most powerful computers. Knowing that fast solution exists makes slow one plain wrong.
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AirPods get stuck in low-quality 16 kHz audio mode when starting a VM
I always love when I find a really dumb solution that works reliably to fix a problem that should never really be a problem in the first place. But having worked with audio devices before—though nothing nearly as complex as the AirPods—I am willing to cut Apple some slack in building a seamless aural experience with…
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The future of Kubernetes is virtual machines
Note: If this topic has peaked your interest, you can join me for a Webinar on August 15 where I’ll dive deep into Cloud Native Operations with Kubernetes and CI/CD Pipelines. Peering into the crystal ball Kubernetes as a technology has been very important to my career this year, and will be even more so for next year…
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Pessimism about parallelism
Massive concurrency and hardware parallelism are sexy topics in the 21st century. There are a couple of good reasons for this and one rather unfortunate one.
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Two-phase commit and beyond
In this post, we model and explore the two-phase commit protocol using TLA+. The two-phase commit protocol is practical and is used in man...
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DragonFly BSD 5.4
DragonFly version 5.4 brings a new system compiler in GCC 8, improved NUMA support, a large number of network and virtual machine driver updates, and updates to video support. This release is 64-bit only, as with previous releases.
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Designing Resilient Systems: Circuit Breakers or Retries?
Grab designs fault-tolerant systems that can withstand failures allowing us to continuously provide our consumers with the many services they expect from us.
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How I wound up finding a bug in GNU Tar
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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Kong gateway reaches 1.0 GA, now supports service mesh
Kong 1.0 includes Service Mesh, Mutual TLS, and gRPC support; as well as a Plugin Development Kit.
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On VBScript
Posted by Ivan Fratric, Google Project ZeroIntroductionVulnerabilities in the VBScript scripting ...
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Improving compression at scale with Zstandard
Two years ago, Facebook open-sourced Zstandard v1.0, a landmark data compression solution that offers best-in-kind performance. Since then, we’ve released a variety of enhancements and advanc…
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Searching statically-linked vulnerable library functions in executable code
Helping researchers find 0ld daysPosted by Thomas Dullien, Project ZeroExecutive summarySoftware ...
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Firefox 64 built with GCC and Clang
One of my tasks (as GCC maintainer of the inter-procedural optimization framework) is to make sure that it works well with real world progra...
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A look at home routers, and a surprising bug in Linux/MIPS
Xôi Lạc TV là địa chỉ theo dõi bóng đá trực tuyến được người dùng đánh giá cao. Với hàng loạt giải đấu được phát sóng miễn phí cùng nhiều thông tin được cập nhật như lịch thi đấu, kết quả, bảng xếp hạng, tỷ số và những tin tức thể thao đáng chú ý.
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Incrementally improving the performance of a Python script
I have been doing a lot of competitive programming problems on Kattis lately. It is my favourite online judge, and I have been enjoying my climb up the Irish scoreboard in an attempt to regain my former glory of first place. In particular, today I was tackling the problem Pivot.
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Write Your Own Virtual Machine
In this tutorial, I will teach you how to write your own virtual machine (VM) that can run assembly language programs, such as my friend’s 2048 or my Roguelike . If you know how to program, but would like to gain a deeper understanding of what is going on inside a computer and better understand how programming…
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Running FreeBSD on OS X using xhyve, a port of bhyve
xhyve is port of bhyve to OS X. It is built on top of Hypervisor.framework in OS X 10.10 Yosemite and higher, runs entirely in userspace, and has no other dependencies.
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Windows Server 2019 Includes OpenSSH
The OpenSSH client and server are now available as a supported Feature-on-Demand in Windows Server 2019 and Windows 10 1809! The Win32 port of OpenSSH was first included in the Windows 10 Fall Creators Update and Windows Server 1709 as a pre-release feature. In the Windows 10 1803 release, OpenSSH was released as a…
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Why I'm usually unnerved when modern SSDs die on us
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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Designing Headers for HTTP Compression
One of the concerns that often comes up when someone creates a new HTTP header is how much “bloat” it will add on the network. This is especially relevant in requests, when a little bit of extra data can introduce a lot of latency when repeated on every request.
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