7352205ce9
This expands to __GCC_DESTRUCTIVE_SIZE, which is also 64 (at least in the x86_64 stdenv). Let the compiler decide what's the appropriate cache line size is. Also, on aarch64-darwin the cache line size 128 bytes, so the previous fix didn't actually get rid of false sharing reliably. Clang does this [1] [2], so it overestimates the sizes somewhat, but that's still enough for avoiding false sharing on darwin. [1]:a289341ded/clang/lib/Frontend/InitPreprocessor.cpp (L1331-L1339)[2]:6f51f8e0f9/clang/lib/Basic/Targets/AArch64.h (L262-L264)
Nix
Nix is a powerful package manager for Linux and other Unix systems that makes package management reliable and reproducible. Please refer to the Nix manual for more details.
Installation and first steps
Visit nix.dev for installation instructions and beginner tutorials.
Full reference documentation can be found in the Nix manual.
Building and developing
Follow instructions in the Nix reference manual to set up a development environment and build Nix from source.
Contributing
Check the contributing guide if you want to get involved with developing Nix.
Additional resources
Nix was created by Eelco Dolstra and developed as the subject of his PhD thesis The Purely Functional Software Deployment Model, published 2006. Today, a world-wide developer community contributes to Nix and the ecosystem that has grown around it.
- The Nix, Nixpkgs, NixOS Community on nixos.org
- Official documentation on nix.dev
- Nixpkgs is the largest, most up-to-date free software repository in the world
- NixOS is a Linux distribution that can be configured fully declaratively
- Discourse
- Matrix: #users:nixos.org for user support and #nix-dev:nixos.org for development
License
Nix is released under the LGPL v2.1.