Re: Request for Testing: TCP RACK

Gary Jennejohn <[email protected]> Sat, 16 Mar 2024 10:51:28 +0000

Newsgroups	gmane.os.freebsd.devel.net
Message-ID	<[email protected]>

On Sat, 16 Mar 2024 10:11:22 +0000
Nuno Teixeira <[email protected]> wrote:

> (...)
>
> > These entries are missing in GENERIC:
> >
> > makeoptions     WITH_EXTRA_TCP_STACKS=1
>
> From https://cgit.freebsd.org/src/commit/?id=3a338c534154164504005beb00a3c6feb03756cc
> WITH_EXTRA_TCP_STACKS was  dropped.
>
> > options         TCPHPTS
>
> That's the missing option in GENERIC that could lead to my slow
> opearations problem
>
> > options         TCP_RACK
>
> Don't think I need this one as I will use kernel module instead of
> building it in kernel.
>
> Resuming I only need to add:
>
> options         TCPHPTS
>
> Is this correct?
>

Yeah, that will probably fix it.  According to a comment in
/usr/src/sys/netinet/tcp_hpts.c it adds a high precision timer
system for tcp, used by RACK and BBR.

--
Gary Jennejohn