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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: 0.217s | source
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gmuslera ◴[17 Nov 24 13:21 UTC] No.42164065[source]▶
Two words: “feedback loop”.

That was the first idea that jumped in when thinking in what could go wrong, not because the Linux kernel, or BPF or this program, just for how it is intended to work. There might be no risk of that happening, there may be controls around that, or if they happen they might only converge to an estable state, but still it is something to have in the map.

replies(1): >>42164266 #
1. marcosdumay ◴[17 Nov 24 14:12 UTC] No.42164266[source]▶
> or if they happen they might only converge to an stable state

That one will always be dependent on the usage patterns. So the auto-tuner can't guarantee it.

Also, I imagine the risk of the feedback turning positive is related to the system load (not CPU, but the usage of the resources you are optimizing). If so, it will make your computer less able to manage load. But this can still be useful for optimizing for latency.