> On 18. Mar 2024, at 12:42, Nuno Teixeira <edua...@freebsd.org> wrote: > > Hello all! > > It works just fine! > System performance is OK. > Using patch on main-n268841-b0aaf8beb126(-dirty). > > --- > net.inet.tcp.functions_available: > Stack D Alias PCB count > freebsd freebsd 0 > rack * rack 38 > --- > > It would be so nice that we can have a sysctl tunnable for this patch > so we could do more tests without recompiling kernel. Thanks for testing!
@gallatin: can you come up with a patch that is acceptable for Netflix and allows to mitigate the performance regression. Best regards Michael > > Thanks all! > Really happy here :) > > Cheers, > > Nuno Teixeira <edua...@freebsd.org> escreveu (domingo, 17/03/2024 à(s) 20:26): >> >> Hello, >> >>> I don't have the full context, but it seems like the complaint is a >>> performance regression in bonnie++ and perhaps other things when tcp_hpts >>> is loaded, even when it is not used. Is that correct? >>> >>> If so, I suspect its because we drive the tcp_hpts_softclock() routine from >>> userret(), in order to avoid tons of timer interrupts and context switches. >>> To test this theory, you could apply a patch like: >> >> It's affecting overall system performance, bonnie was just a way to >> get some numbers to compare. >> >> Tomorrow I will test patch. >> >> Thanks! >> >> -- >> Nuno Teixeira >> FreeBSD Committer (ports) > > > > -- > Nuno Teixeira > FreeBSD Committer (ports)
