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The most popular blog posts about systems & performance on Hacker News. 4,389 posts.
I doubt there has ever been a time when software architecture was seen as a raging success. The “three-tier architecture” of the web has held up extremely well and is an excellent place for many people to start. The “12 Factor App” approach has encouraged developers to adopt practices that make deployment and scaling…
Since this article contains a lot of interactive demos relying on fairly modern browser technology, let's make sure that everything is OK before continuing.
Another guest post by @NeoMoevius from Twitter. Same as earlier with the Native Urban Terror on FreeBSD article. This time it will be about setting up Home Audio Studio on a FreeBSD 13.1 system. Th…
In this article we will learn how to deploy Keycloak with PostgreSQL on Kubernetes. We will first do everything manually with separate YAMLs and then later with Helm. Our k8s environment will run i…
sysctl is a simple and great tool for modifying the kernel parameters. It does its job very well by providing an easy-to-use interface for /proc/sys. It is maintained as a part of procps toolkit for years and it can easily be considered a legacy tool today. So why not push it to its limits and turn it into a more…
This function doesn't know the value being multiplied until it is called. The compiler (gcc, O2) emits a generic integer multiply instruction in its loop body.
While ZFS has a well-earned reputation for data integrity and reliability, OpenZFS native encryption has some incredibly sharp edges that will cut you if you don't know where to be careful. Unfortunately, I learned this the hard way, standing in a pool of my own blood and tears after thoroughly lacerating myself…
In the previous article we explored how Go’s memory allocator manages heap memory — grabbing large arenas from the OS, dividing them into spans and size classes, and using a three-level hierarchy (mcache, mcentral, mheap) to make most allocations lock-free. A key detail was that each P (processor) gets its own memory…
Alex Clemmer is a computer programmer. Other programmers love Alex, excitedly describing him as "employed here" and "the boss's son".
We’re going to reproduce some results from papers on filesystem robustness that were written up roughly a decade ago : Prabhakaran et al. SOSP 05 paper , which injected errors below the filesystem and Gunawi et al. FAST 08 , which looked at how often filesystems failed to check return codes of functions that can…
I brag about my newest obsession.
At Stripe, we rely heavily on ruby and EventMachine to power various internal and external services. Over the last several months, we’ve known that one such service suffered from a gradual memory leak, that would cause its memory usage to gradually balloon from a normal ~50MB to multiple gigabytes. It was easy enough…
The text in these files is the unedited original manuscript. M-K has fine copy editors, who have fixed all the minor typos, spelling, and grammar errors in the printed book, but if you come across factual errors I'd still appreciate help getting all the details of linking and loading as complete and correct as…
Quick demonstration of using User Mode Linux (UML) to run a Linux VM inside Linux's userspace, without additional VM software or even root permissions
In this post, we will explore how to build a high-performance database buffer pool in Zig using io_uring's new fixed-buffer mode.
Trying to figure out how KVM-based virtual machine hosts work by implementing one from scratch.
opensnoop in pure C using eBPF
Over lunch last week Mikhail Naganov (creator of the DevTools Heap Profiler ) and I were discussing how invaluable it has been to have the ...
Running processes in isolated network namespaces
Asynchronous IO (also known as "non-blocking IO") is a technique applications use to allow performing of many IO operations without blocking the calling OS thread, and without needing to spawn many threads (i.e. one thread per operation). In the late 1990s/early 2000s, an increasing amount of people using the internet…
My talk should be on in about an hour and a half from when I post this. A possible next evolutionary step for computers is persistent memory: large capacity non-volatile main memory. With a few terabytes of nonvolatile RAM, who needs an SSD any more? I will sketch out a proposal for how to…
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Minimodem can play and capture audio modem tones in real-time via the system audio device, or in batched mode via audio files.
Still not really about LAPACK. It's a second part of the “outperforming” series explaining how the C++ metaprogramming can appear useful for efficient code generation.
Achieving 100 Gbps intrusion prevention on a single server, Zhao et al., OSDI’20 Papers-we-love is hosting a mini-event this Wednesday (18th) where I’ll be leading a panel discussion including one …
