Linux @lemmy.ml Chewy @discuss.tchncs.de 11 mo. ago

Optimising Ubuntu performance on amd64 architecture

ubuntu.com Optimising Ubuntu performance on amd64 architecture | Ubuntu

Everyone wants the Linux distribution they are using to be fast. This is practically a contention-free statement, of course: who would want their distro to be slow? But at the same time, what does it mean for your distribution to be fast? For example, Ubuntu 21.10 switched the default compression fo...

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It seems multiple Linux distributions are considering to update their x86-64 baseline architecture. This could improve performance, at the cost of hardware compatibility.

https://discourse.nixos.org/t/pre-rfc-gradual-transition-of-nixos-x86-64-baseline-to-x86-64-v3-with-an-intermediate-step-to-x86-64-v2/
- Gentoo with -march=native -mtune=native on x86(-64) or -mcpu=native everywhere else
  
  Doesn’t march=native imply mtune=native ?
  
  No. march is avaliable instructions and mtune is timings. mcpu does, but it is not used on x86 for some reason
  
  march=native does imply mtune=native, at least on gcc

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