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Concurrency Glossary
🦑 Informal definitions of terms used in concurrency modeling
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 6,942 posts.
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GpuScan and SSD-To-GPU Direct DMA
An article for none-Japanese readers....What I'm recently working on is a feature to load data blocks from NVMe-SSD to GPU using peer-to-peer DMA. It allows to bypass the CPU/RAM under a series of data loading process, thus, also allows to reduce number of expensive data copy. Once data blocks are l…
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Blender Cycles Turbocharged: how we made rendering 10x faster
Blender Studio is a web service that provides access the training videos and all the data from the Blender open projects.
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Understanding Kafka with Factorio (2019)
While playing Factorio the other day, I was struck by the many similarities with Apache Kafka.
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The RAM Myth
The RAM myth is a belief that modern computer memory resembles perfect random-access memory. Cache is seen as an optimization for small data: if it fits in L2, it’s going to be processed faster; if it doesn’t, there’s nothing we can do. Most likely, you believe that code like this is the fastest way to shard data (I’m…
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How Does FaceTime Work?
As an ex-pat living in Denmark, I use FaceTime audio a lot. Not only is it simple to use and reliable, but the sound quality is incredible. For those of you old enough to remember landlines, it reminds me of those but if you had a good headset. When
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What Happens to OO When Processors Are Free? (2015)
A while ago, I presented as a crazy thought experiment the idea of using Montecito's transistor budget for creating a chip with tens of tho...
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Serving a high-performance blog solely from memory, using Rust
Xe Iaso's personal website.
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Running OS X Mavericks under QEMU with KVM
This domain name is available, own it today. Affordable payment options. Fast and professional service.
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Microsoft didn’t sandbox Windows Defender, so I did
Microsoft exposed their users to a lot of risks when they released Windows Defender without a sandbox. This surprised me. Sandboxing is one of the most effective security-hardening techniques. Why did Microsoft sandbox other high-value attack surfaces such as the JIT code in Microsoft Edge, but leave Windows Defender…
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Why are my ZFS disks so noisy?
Earlier this year, a user at Practical ZFS asked a deceptively simple question: I have a Proxmox pool of three four-wide RAIDz1 vdevs. Whenever my VM is running, all twelve... Read More
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Spectre/Meltdown Pits Transparency Against Liability
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…
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Dropbox disables ASLR on Windows
Dropbox has become a daily part of my life. I rely on it to synchronise data between my growing set of devices. But how much of an impact does it have on the security of my system? I decided to fin…
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Big Fish: Exploiting a 37-Year-Old Kernel Bug in OpenBSD
Big fish. Small counter. Root shell.
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How to Design a Scalable Rate Limiting Algorithm
What is rate limiting? Navigate through the pros and cons of the available algorithms and best practices for how to design scalable rate limiting in Kong API.
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What We Talk About When We Talk About Distributed Systems
For quite some time now I’ve been trying to learn about distributed systems, and it’s appropriate to say that once you start digging, there seems to be no end to it, the rabbit hole goes on and on. The literature in distributed systems is quite extensive, with lots of papers coming from different universities, plus…
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Linux Network Performance Ultimate Guide
https://blog.packagecloud.io/illustrated-guide-monitoring-tuning-linux-networking-stack-receiving-data/
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OpenSSL memory use in Node.js
Last Thursday I went to the Joyent office for Node Office Hours — I wanted to talk to Isaac about running a private NPM registry .
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Android 13 requires devices to have more than 2GB RAM and 16GB storage
News and insights on the Android platform, developer tools, and events.
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Best practices can slow your application down
In order to get the most performant site possible when building the codebase for our public Stack Overflow site, we didn’t always follow best practices.
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How oxide cuts data center power consumption in half
A rack-scale design that drives data center power efficiency.
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What functional programmers get wrong about systems
Type systems verify properties of programs. Production correctness is a property of systems. The gap between these is where the interesting failures live.
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Warp, a fast preprocessor for C and C++
Visit the post for more.
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Where's the fastest place to put my server? How much does it matter?
Using my own web server accesslogs and public latency data to get a quantitative answer and why roundtrips are such a pain.
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Beating the Compiler
In modern times, everyone knows that writing assembly is a fool's errand: compilers are the result of literal engineer-centuries of work, and they know the processor much better than you do.
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I'm unsure of the security of simultaneous multithreading on modern x86 CPUs
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…