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Unix and Multics (2019)
Story from the development of the Multics operating system. Unix, our famous child.
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 569 posts.
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Security researchers identify new malware targeting Linux
ESET researchers analyzed previously unknown Linux backdoors that are connected to known Windows malware used by the China-aligned Gelsemium group, as well as to Project Wood.
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Thinking in Actors – Challenging your software modelling to be simpler
Challenging your software modelling techniques to be simpler
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Ledger: Stripe's system for tracking and validating money movement
Technical details on how Stripe built Ledger, a state-of-the-art money movement tracking system, including how teams at Stripe interact with the data quality metrics that underlie our payment processing network.
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WASI 0.2.0 and Why It Matters
With the release of WASI Preview 2, we take a step back and look at why it matters for wasmCloud and the WebAssembly ecosystem.
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Arena-based parsers
The code is a bit "experimental" but it's available in the arena-fixes branch (make sure to enable --features=development if you run it from a Git repo).
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Jepsen: Jetcd 0.8.2
Etcd is a coordination service designed to offer Strict Serializable reads, writes, and micro-transactions over a small, in-memory key-value store. In 2022, Jepsen re-tested etcd as a part of a private engagement covering an assortment of databases. We reported several issues to the etcd team during that engagement…
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M3 CPU cores have become more versatile
M3 chips widen the gap between Pro and Max variants. They also change relative performance between P and E cores to make M3 CPUs more versatile.
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When are SSDs slow?
CedarDB is a database system that delivers unmatched performance for transactions and analytics, from small writes to handling billions of rows. Built on cutting-edge research to power today’s tools and tomorrow’s challenges.
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Compiling to Assembly from Scratch
Then come along! Let’s make a compiler that goes all the way from source to assembly from scratch—no shortcuts!
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Why is Snapshot Isolation not enough?
Let's talk about why Snapshot Isolation is not enough for a general purpose concurrency control. Snapshot Isolation has been adap...
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Building a baseline JIT for Lua automatically (2023)
This is the Part 2 of a series. Feel free to read the prequel for more context: Building the fastest Lua interpreter automatically Building a good VM for a dynamic language takes a ton of engineerin
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Bpftop: Streamlining eBPF performance optimization
By Jose Fernandez
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OpenBSD, the computer appliance maker's secret weapon
Between our ESP32 prokaryotic organisms and our 24/7 Internet-enabled megafauna servers, there exists a vast and loosely-defined ecosystem of things the B2B world likes to call computer appliances. Picture a bespoke Pi 4 packaged up neatly with some Python scripts, a little fancy plastic embossing, and maybe a…
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The memory remains: Permanent memory with systemd and a Rust allocator
A Rust object that survives program restart thanks to Rust allocators, systemd's file descriptor store, and syscall memfd_create.
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Let's Embed a Go Program into the Linux Kernel (2023)
Today, we would like to present a lesser-known feature of the Linux kernel. Instead of launching a program from a file system, regardless of whether it's virtual or not, it is also possible to embed a user-space program directly into the kernel image itself and start it from there.
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Summing ASCII encoded integers on Haswell at almost the speed of memcpy
“Print the sum of 50 million ASCII-encoded integers uniformly sampled from [0, 2³¹−1], separated by a single new line and sent to standard input.”
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NetBSD 10.0 Released
Download 10.0 from our CDN: amd64 USB , amd64 CD , various ARM devices , full release dir with everything else .
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A jump into the middle of an instruction from nowhere (2023)
Another rogue patcher.
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SEQUOIA: Exact Llama2-70B on an RTX4090 with half-second per-token latency
Serving Llama2-70B on an RTX4090 with Sequoia
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Optimizing ClickHouse: Tactics that worked for us
At LaunchDarkly, we ingest nearly 100 terabytes of observability data from our customers every month.
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Exploring How Cache Memory Works
Even though we often hear terms like L1, L2, cache block size, etc., most programmers have a limited understanding of what cache really is. This is a beginner-friendly primer on how cache works.
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Way too many ways to wait on a child process with a timeout
I often need to launch a program in the terminal in a retry loop. Maybe because it's flaky, or because it tries to contact a remote service that is not available. A few scenarios:
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"Doors" in Solaris: Lightweight RPC Using File Descriptors (1996)
A door is a "file" descriptor used to describe a procedure in a process and optionally some additional state associated with the procedure. Doors were initially designed as Spring object descriptors used to encapsulate the state and capabilities of C++ objects. A process which obtains a door is free to pass it, along…
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Towards userspaceification of POSIX – part I: signal handling and IO
The Redox official website
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GCC Specs: An Introduction
If you've ever used the GNU Compiler Collection (GCC) then you've worked with the gcc binary. For those who don't know, gcc is a driver, not a compiler. It runs the compiler/assembler/linker as required and coordinates the input and output between them. Use of the driver is so ubiquitous that everyone calls it the…
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Nebula is not the fastest mesh VPN, but neither are the others
(But neither are any of the others)