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The most popular blog posts about systems & performance on Hacker News. 458 posts.
Office 365 Advanced Threat Protection (Office 365 ATP) blocked many notable zero-day exploits in 2017. In our analysis, one activity group stood out: NEODYMIUM. This threat actor is remarkable for two reasons: FinFisher is such a complex piece of malware that, like other researchers, we had to devise special methods…
This paper presents an evaluation of the use of a high-level language (HLL) with garbage collection to implement a monolithic POSIX-style kernel. The goal is to explore if it is reasonable to use an HLL instead of C for such kernels, by examining performance costs, implementation challenges, and programmability and…
ramblings by Adam Perry
What is the oldest x86 processor that is still supported by a modern Linux kernel in present time? I asked the above quiz question during the Geekcamp tech conference in Nov 2017 during my emcee role. The theoretical answer as you can glean from the title of this post is the 486 which was first released in 1989. I…
Computer code that I’m writing usually doens’t keep me up at night. After all, it’s only bits & bites and if something doesn’t work properly you can always fix it, that’s the beauty of software.
This post discusses how maps are implemented in Go. It is based on a presentation I gave at the GoCon Spring 2018 conference in Tokyo, Japan.
🦑 Informal definitions of terms used in concurrency modeling
There is a lot of righteous anger directed toward Intel over CPU bugs that were revealed by Spectre/Meltdown. I agree that things could have been handled better, particularly with regards to transparency and the sharing of information among the relevant user communities that could have worked together to deploy…
I recently did a corporate TLA+ workshop and some people asked what TLA+ specs look like in practice. If you looked at the most common public examples, you’d probably come away thinking that people only used it for critical consensus algorithms. This is a problem for two reasons: first, it makes it harder to learn…
It’s not often I am able to write a patch that not only reduces memory usage, but increases speed as well. Usually I find myself trading memory for speed, so it’s a real treat when I can improve both in one patch. Today I want to talk about the patch I submitted to Ruby in this ticket. It decreases “after boot” memory…
Internally our DDoS mitigation team is sometimes called "the packet droppers". When other teams build exciting products to do smart things with the traffic that passed through our network, we take joy in discovering novel ways of discarding it.
Explore the Qt Blog for the latest insights on e.g. Qt Creator, your go-to source for cross-platform development tips and updates.
Tim Kadlec writes about performance, product management, and the web.
Check out how you can use the proc filesystem to retrieve the kernel stack trace of a given process
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…
Last week, Microsoft issued January’s cumulative security fixes for January 2018. Although the media focus has been around “Meltdown” and…
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...
Note: This blog post from 2018 predates the Intel Ice Lake (Sunny Core) and AMD Zen 4 processors. These newer processors are not affected by the issues described in this blog post. Our processors typically do computations using small data stores called registers. On 64-bit processors, 64-bit registers are frequently…
Almost 3.5 years ago I started the Mailinator(tm) service. I got the bulk of the idea from my drunk roommate at the time and the first incar...
gfx-rs is a project bringing efficient cross-platform graphics to rust. This blog supposedly hosts the major milestones, concepts, and recaps of the project.
From the highly eclectic blog of Mark Dominus
