Date: Fri, 24 Apr 2020 23:44:30 +0200 From: Michael Tuexen <tuexen@freebsd.org> To: Neel Chauhan <neel@neelc.org> Cc: "Rodney W. Grimes" <freebsd-rwg@gndrsh.dnsmgr.net>, "Herbert J. Skuhra" <herbert@gojira.at>, freebsd-current@freebsd.org Subject: Re: How to enable tcp bbr in FreeBSD??? Message-ID: <5845EA22-8BF3-4294-A8D6-7F21E1318F06@freebsd.org> In-Reply-To: <a77036f4f212303d45620aff6a75868e@neelc.org> References: <202004241906.03OJ62ZD086284@gndrsh.dnsmgr.net> <26592FE0-4649-47B1-91F4-4369775B90A8@freebsd.org> <a77036f4f212303d45620aff6a75868e@neelc.org>
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> On 24. Apr 2020, at 23:41, Neel Chauhan <neel@neelc.org> wrote: >=20 > Not OP, but would BBR work with VNET, or is that a WIP? I would say it should work. At least, if not I would consider it a bug. I think most testing was not done with multiple VNETs. Best regards Michael >=20 > I'm sorry if none of you are familiar with VNET. >=20 > -Neel >=20 > =3D=3D=3D >=20 > https://www.neelc.org/ > BTW: Not neel@ the committer >=20 > On 2020-04-24 12:25, Michael Tuexen wrote: >>> On 24. Apr 2020, at 21:06, Rodney W. Grimes = <freebsd-rwg@gndrsh.dnsmgr.net> wrote: >>>> On Fri, Apr 24, 2020 at 01:31:35PM +0200, Kurt Jaeger wrote: >>>>> Thanks. Is BBR active automatically or is there a sysctl or >>>>> socket option to activate it ? >>>> net.inet.tcp.cc.available: List available congestion control = algorithms >>>> net.inet.tcp.cc.algorithm: Default congestion control algorithm >>> Start at: >>> man mod_cc >> BBR is conceptually a CC, but in FreeBSD it is NOT implemented as a = CC module. >> It is a TCP stack. You need to load it using >> kldload tcp_bbr >> and then either make it the default by >> sudo sysctl net.inet.tcp.functions_default=3Dbbr >> or use the IPPROTO_TCP level socket option TCP_FUNCTION_BLK to set = the stack >> to BBR. The uperf test tool allows to set the TCP stack for = measurements. >> Please note that you need to compile the kernel with >> makeoptions WITH_EXTRA_TCP_STACKS=3D1 >> options TCPHPTS >> Best regards >> Michael >>> -- >>> Rod Grimes = rgrimes@freebsd.org >>> _______________________________________________ >>> freebsd-current@freebsd.org mailing list >>> https://lists.freebsd.org/mailman/listinfo/freebsd-current >>> To unsubscribe, send any mail to = "freebsd-current-unsubscribe@freebsd.org" >> _______________________________________________ >> freebsd-current@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-current >> To unsubscribe, send any mail to = "freebsd-current-unsubscribe@freebsd.org"
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