Date: Tue, 12 Jul 2005 12:21:23 +0300 From: Danny Braniss <danny@cs.huji.ac.il> To: David Malone <dwmalone@maths.tcd.ie> Cc: freebsd-net@freebsd.org, freebsd-stable@freebsd.org, Noritoshi Demizu <demizu@dd.iij4u.or.jp>, Luigi Rizzo <rizzo@icir.org> Subject: Re: tcp troughput weirdness Message-ID: <E1DsGx9-0008Xc-GW@cs1.cs.huji.ac.il> In-Reply-To: Your message of Tue, 12 Jul 2005 09:59:50 %2B0100 .
next in thread | raw e-mail | index | archive | help
> > > Are the window sizes on Linux bigger or smaller? > > > TCP window size: 16.0 KByte (default) > > smaller :-(, but increasing it does not make any change > > Hmmm... Various things that you could try (I'd try them > one by on, rather than all together): > > 1) sysctl net.inet.tcp.inflight_enable=0 > > 2) sysctl net.inet.tcp.sendspace=131072 > sysctl net.inet.tcp.recvspace=131072 > > 3) sysctl net.inet.tcp.sack.enable=0 > > I'd be interested to know if any of them make much difference. combining sysctl net.inet.tcp.sendspace=131072 and sysctl net.inet.tcp.inflight.enable=0 did the trick! now can someone remind me what inflight does? and could someone explain why increasing sendspace alone did not do the trick? (i had it at 64k, which got things better, but not sufficient). thanks! > > David.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?E1DsGx9-0008Xc-GW>