Date: Thu, 17 Oct 2002 01:08:34 -0700 (PDT) From: Oleg Polyakov <opolyakov@yahoo.com> To: freebsd-net@FreeBSD.ORG Subject: Re: delayed ACK Message-ID: <20021017080834.24087.qmail@web10412.mail.yahoo.com> In-Reply-To: <3DAC9D37.7060701@expertcity.com>
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--- Steve Francis <steve@expertcity.com> wrote: > Lars Eggert wrote: > > >Paul Herman wrote: > > > > > >>Not true. Although some bugs have been fixed in 4.3, FreeBSD's > >>delayed ACKs will still degrade your performance dramatically in > >>some cases. > >> > >> > > > >I'm sorry, but such statements without a packet trace that exhibits the > >problem are just not useful. > > > >Lars > > > > > He's probably referring to poorly behaved windows clients, on certain > applications, if you leave net.inet.tcp.slowstart_flightsize at default. > > Incidentally, why are not the defaults on > net.inet.tcp.slowstart_flightsize higher? > RFC2414 seems to indicate it should be higher. Solaris in version 8 and > later default to 4 for this value. As you may know there is RFC draft which will replace RFC2414 (draft-ietf-tsvwg-initwin-04). It also require to decrease cwnd in case we decreasing MSS because of PMTU Discovery to prevent small packet bursts. I've got patches, they are pretty trvial - somebody with commit bit has to take a look and put them in a tree. ---- Oleg __________________________________________________ Do you Yahoo!? Faith Hill - Exclusive Performances, Videos & More http://faith.yahoo.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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