From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-bk0-f43.google.com (mail-bk0-f43.google.com [209.85.214.43]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 6128721F0B9 for ; Thu, 12 Jul 2012 00:34:25 -0700 (PDT) Received: by bkty15 with SMTP id y15so3016881bkt.16 for ; Thu, 12 Jul 2012 00:34:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=subject:from:to:cc:in-reply-to:references:content-type:date :message-id:mime-version:x-mailer:content-transfer-encoding; bh=rI1xUeaJWOCa8QcsZOlT7QrxhfRTCBAp5U1WGpoSOJE=; b=sQVF87NEIeu9KtBPe9lPYx+FjpMxmh1z8YVcweaT72S8qnHKcwMU0AIldgo0fNCs07 KZSDKj+ZWEOJrvlavgrh1dOCMXY+MQn2F6cQ8wjzPKiFgtLhEoNNxvWjvLEqw2xPYYED AA2dcDvZ5nZfjH28v8jee+mjJTa5OpMLnvOneKo8cDucNVn/VzVYc8LHwB570eqz/I7A kBN0LnI8AwOLL5u2NagiYoK354+MBBKiE0bjzL4XdolvpvWuFpFaZjkXBc8RZ2hwNMFg JXRd1sEktqNFyLR8ZosjmBbLVNw56NhN3iAUJdzA0knlDdHYG2lYr9pBhpIZft2Rg9W7 nD8A== Received: by 10.204.145.90 with SMTP id c26mr15614819bkv.34.1342078462644; Thu, 12 Jul 2012 00:34:22 -0700 (PDT) Received: from [172.28.88.151] ([74.125.122.49]) by mx.google.com with ESMTPS id he8sm2285711bkc.3.2012.07.12.00.34.20 (version=SSLv3 cipher=OTHER); Thu, 12 Jul 2012 00:34:22 -0700 (PDT) From: Eric Dumazet To: Rick Jones In-Reply-To: <1342050592.3265.8195.camel@edumazet-glaptop> References: <1340945457.29822.7.camel@edumazet-glaptop> <1341396687.2583.1757.camel@edumazet-glaptop> <20120709.000834.1182150057463599677.davem@davemloft.net> <1341845722.3265.3065.camel@edumazet-glaptop> <1341933215.3265.5476.camel@edumazet-glaptop> <1342019518.3265.8116.camel@edumazet-glaptop> <4FFDC985.6050805@hp.com> <1342050592.3265.8195.camel@edumazet-glaptop> Content-Type: text/plain; charset="UTF-8" Date: Thu, 12 Jul 2012 09:34:19 +0200 Message-ID: <1342078459.3265.8244.camel@edumazet-glaptop> Mime-Version: 1.0 X-Mailer: Evolution 2.28.3 Content-Transfer-Encoding: 7bit Cc: nanditad@google.com, netdev@vger.kernel.org, mattmathis@google.com, codel@lists.bufferbloat.net, ncardwell@google.com, David Miller Subject: Re: [Codel] [RFC PATCH v2] tcp: TCP Small Queues X-BeenThere: codel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: CoDel AQM discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 12 Jul 2012 07:34:26 -0000 On Thu, 2012-07-12 at 01:49 +0200, Eric Dumazet wrote: > The 10Gb receiver is a net-next kernel, but the 1Gb receiver is a 2.6.38 > ubuntu kernel. They probably have very different TCP behavior. I tested TSQ on bnx2x and 10Gb links. I get full rate even using 65536 bytes for the /proc/sys/net/ipv4/tcp_limit_output_bytes tunable OMNI Send TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 10.246.8.37 () port 0 AF_INET : histogram Local Remote Local Elapsed Throughput Throughput Local Local Remote Remote Local Remote Service Send Socket Recv Socket Send Time Units CPU CPU CPU CPU Service Service Demand Size Size Size (sec) Util Util Util Util Demand Demand Units Final Final % Method % Method 1606536 2097152 16384 20.00 9411.12 10^6bits/s 2.40 S 4.27 S 0.502 0.892 usec/KB