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Bpftune uses BPF to auto-tune Linux systems

(github.com)
256 points BSDobelix | 1 comments | 17 Nov 24 11:38 UTC | HN request time: 0.875s | source
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usr1106 ◴[17 Nov 24 12:09 UTC] No.42163756[source]▶
Interesting. But if tuning parameters to their best values were easy, shouldn't the kernel just do that in the first place?
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sgarland ◴[17 Nov 24 15:10 UTC] No.42164567[source]▶
I’d rather the kernel present a good-enough but extremely stable set of configs. If I’m using a distro like Arch or Gentoo, then sure, maybe run wild (though both of those would probably assume I’m tuning them anyway), but CentOS, Debian, et al.? Stable and boring. If you change something, you’d better know what it is, and why you’re doing it.
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1. withinboredom ◴[18 Nov 24 07:17 UTC] No.42170448[source]▶
These parameters affect things at the hardware level, and in the kernel. There’s “good enough” defaults already, but if you want to take full advantage of your specific hardware, you need to tune it. This is especially important the more different your hardware is from kernel developers’ computers (like 10g nics).