Re: Request for Testing: TCP RACK

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 all!
Really happy here :)

Cheers,

Nuno Teixeira <eduardo@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)