Date: Tue, 12 Jul 2005 18:53:04 +0900 (JST) From: Noritoshi Demizu <demizu@dd.iij4u.or.jp> To: Danny Braniss <danny@cs.huji.ac.il> Cc: David Malone <dwmalone@maths.tcd.ie>, freebsd-net@freebsd.org, freebsd-stable@freebsd.org, Luigi Rizzo <rizzo@icir.org> Subject: Re: tcp troughput weirdness Message-ID: <20050712.185304.32727687.Noritoshi@Demizu.ORG> In-Reply-To: <E1DsGx9-0008Xc-GW@cs1.cs.huji.ac.il> References: <E1DsGx9-0008Xc-GW@cs1.cs.huji.ac.il>
next in thread | previous in thread | raw e-mail | index | archive | help
> combining > sysctl net.inet.tcp.sendspace=131072 > and > sysctl net.inet.tcp.inflight.enable=0 > > did the trick! Congratulations! But I wonder why the throughput of FreeBSD=>Linux was almost equal to that of Linux=>FreeBSD. If the settings above improves the throughput of FreeBSD=>FreeBSD, the throughput of FreeBSD=>Linux would also be improved with them. Is it improved? > now can someone remind me what inflight does? In my understanding, it tries to estimate bandwidth-delay product and tries to avoid injecting too much data segments into networks. So, if it underestimates bandwidth-delay product, throughtput may be reduced. Regards, Noritoshi Demizu
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20050712.185304.32727687.Noritoshi>