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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: 0.21s | source
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gausswho ◴[17 Nov 24 14:33 UTC] No.42164371[source]▶
With this tool I am wary that I'll encounter system issues that are dramatically more difficult to diagnose and troubleshoot because I'll have drifted from a standard distro configuration. And in ways I'm unaware of. Is this a reasonable hesitation?
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1. Twirrim ◴[17 Nov 24 16:22 UTC] No.42164990[source]▶
Disclaimer: I work for Oracle, who publish this tool, though I have nothing to do with the org or engineers that created it

I've been running this for a while on my laptop. So far yet to see any particular weirdness, but also I don't know that I can state with any confidence it has a positive impact either. I've not carried out any benchmarks in either direction.

It logs all changes that it's going to make including what they were on before. Here's an example from my logs:

    bpftune[1852994]: Scenario 'need to increase TCP buffer size(s)' occurred for tunable 'net.ipv4.tcp_rmem' in global ns. Need to increase buffer size(s) to maximize throughput
    bpftune[1852994]: Due to need to increase max buffer size to maximize throughput change net.ipv4.tcp_rmem(min default max) from (4096 131072 7864320) -> (4096 131072 9830400)