From owner-freebsd-current@FreeBSD.ORG Mon Dec 5 22:12:29 2011 Return-Path: Delivered-To: current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 963E81065670 for ; Mon, 5 Dec 2011 22:12:29 +0000 (UTC) (envelope-from luigi@onelab2.iet.unipi.it) Received: from onelab2.iet.unipi.it (onelab2.iet.unipi.it [131.114.59.238]) by mx1.freebsd.org (Postfix) with ESMTP id 596C98FC08 for ; Mon, 5 Dec 2011 22:12:29 +0000 (UTC) Received: by onelab2.iet.unipi.it (Postfix, from userid 275) id B59397300A; Mon, 5 Dec 2011 23:28:34 +0100 (CET) Date: Mon, 5 Dec 2011 23:28:34 +0100 From: Luigi Rizzo To: Daniel Kalchev Message-ID: <20111205222834.GA50285@onelab2.iet.unipi.it> References: <20111205192703.GA49118@onelab2.iet.unipi.it> <2D87D847-A2B7-4E77-B6C1-61D73C9F582F@digsys.bg> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <2D87D847-A2B7-4E77-B6C1-61D73C9F582F@digsys.bg> User-Agent: Mutt/1.4.2.3i Cc: current@freebsd.org Subject: Re: datapoints on 10G throughput with TCP ? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Dec 2011 22:12:29 -0000 On Mon, Dec 05, 2011 at 11:15:09PM +0200, Daniel Kalchev wrote: > > On Dec 5, 2011, at 9:27 PM, Luigi Rizzo wrote: > > > - have two machines connected by a 10G link > > - on one run "nuttcp -S" > > - on the other one run "nuttcp -t -T 5 -w 128 -v the.other.ip" > > > > Any particular tuning of FreeBSD? actually my point is first to see how good or bad are the defaults. I have noticed that setting hw.ixgbe.max_interrupt_rate=0 (it is a tunable, you need to do it before loading the module) improves the throughput by a fair amount (but still way below line rate with 1500 byte packets). other things (larger windows) don't seem to help much. cheers luigi