Date: Mon, 14 Nov 2011 09:50:18 +0100 From: =?ISO-8859-1?Q?Ermal_Lu=E7i?= <eri@freebsd.org> To: Erich Weiler <weiler@soe.ucsc.edu> Cc: freebsd-net@freebsd.org, Matt Connor <bsd@xerq.net> Subject: Re: Arg. TCP slow start killing me. Message-ID: <CAPBZQG32NicV94=J5HOrm-zbiBaf2ghWuFwDk=UqAeVsZFMqzA@mail.gmail.com> In-Reply-To: <4EC0BB34.3020600@soe.ucsc.edu> References: <4EC033B7.5080609@soe.ucsc.edu> <4EC0395C.3030302@swin.edu.au> <4EC055CB.40100@soe.ucsc.edu> <4EC0585F.5000104@soe.ucsc.edu> <CAAAm0r0TO5ifZ_-s%2BJEN5jwRNuZQq=8t6zRRKSnfPBTO2Rb%2Bng@mail.gmail.com> <4EC05F58.1050103@soe.ucsc.edu> <4EC072CB.5030800@freebsd.org> <9898624e64a38e5e860591d194ec5c70@www1.xerq.net> <4EC0BB34.3020600@soe.ucsc.edu>
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On Mon, Nov 14, 2011 at 7:54 AM, Erich Weiler <weiler@soe.ucsc.edu> wrote: >> Have you considered empty ACK prioritization? I implemented this a year >> ago on a pair of production edge routers and noticed significant >> improvement on throughput. I have production code examples if you >> require them, but this link should be more than enough to get you starte= d: > > Fascinating. =A0pfSense does have traffic shaping options, among them ACK > prioritization and queues. =A0Let me play with that a bit. =A0Totally cou= ld be > affecting me - my downstream traffic could be great enough to crows out > ACKs, thus causing the TCP stream resets. =A0Sounds plausible, at least. pfSense has dummynet and ACK prioritization that can help here though i think before implementing a fix you should find the cause to fix! --=20 Ermal
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