The latest blog posts to take off on Hacker News. 553 posts.
TL;DR Modern disks are so fast that system performance bottleneck shifts to RAM access and CPU. With up to 64 cores, PCIe 4.0 and 8 memory channels, even a single-socket AMD ThreadRipper Pro workstation makes a hell of a powerful machine - if you do it right! Update 1: Since 2021, networks have gotten faster and now…
Lenovo has finally made a smaller version of its X1 Carbon , something I've been looking forward to for years.
This post explains the project's motivation from several perspectives. Unix shell is an old and successful technology, so there are many ways of looking at it.
We rendered the top 1 million pages on the web, tracking every conceivable performance metric, logging every error, noting every requested URL. To our knowledge this produces the first dataset that connects performance, errors, and library use on the web. In this article we analyze what the data can tell us about…
On 8 January 2021 at 14:05 CET the synchronous area of Continental Europe was separated into two parts due to outages of several transmission network elements in a very short time. ENTSO-E has published the first information on the event already on 8 January 2021, followed by an update with geographical view and time…
Latches and barriers are coordination types that enable some threads to wait until a counter becomes zero. You can use a std::latch only once, but you can use a std::barrier more than once. Today, I have a closer look at latches.
With the second gen of Graviton2 instances announced, we decided to take a look at the price/performance from the standpoint of running PostgreSQL.
Less than a month ago, I began investigating the Apple M1 GPU in hopes of developing a free and open-source driver. This week, I’ve reached a second milestone: drawing a triangle with my own open-source code. The vertex and fragment shaders are handwritten in machine code, and I interface with the hardware via the…
Differential dataflow is a library that lets you write simple dataflow programs and a) then runs them in parallel and b) efficiently updates the outputs when new inputs arrive. Compared to competition like spark and kafka streams , it can handle more complex computations and provides dramatically better throughput and…
Posts and writings by Lennart Poettering
Virtual iOS, Android, and Arm devices to speed up security testing, research, and DevSecOps for security teams, mobile pentesters, and software developers.
The release of Apple Silicon based Macs at the end of last year generated a flurry of news and some surprises at the machine’s performance.
Introducing new no-cost RHEL programs for small production deployments and enterprise development teams.
I wanted to share a story of a segmentation fault I helped track down this weekend. I thought the final root cause of the segfault was interesting because of how unrelated it was to the code I was trying to debug.
BitLocker is a modern data protection feature that is deeply integrated in the Windows kernel. It is used by many corporations as a means of protecting company secrets in case of theft. Microsoft recommends that you have a Trusted Platform Module which can do some of the heavy cryptographic lifting for you.
This report covers FreeBSD related projects for the period between October and December, and is the fourth of four planned reports for 2020.
This post is about a VirtualBox escape for the latest currently available version (VirtualBox 6.1.16 on Windows). The vulnerabilities were discovered and exploited by our team Sauercl0ud as part of the RealWorld CTF 2020/2021. The vulnerability was known to the organizers, requires the guest to be able to insert…
Note: This post is only kept up for historical reasons. The current ExaGear EULA doesn’t allow using ExaGear outside of Huawei Kunpeng processors.
A couple months back I switched my terminal from xfce4-terminal to the venerable xterm. For some reason I always put xterm in the same bucket as xclock, xmessage, or any other prehistoric command starting with X that comes pre-installed on any graphical Linux distribution.
