From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-we0-f176.google.com (mail-we0-f176.google.com [74.125.82.176]) by dpdk.org (Postfix) with ESMTP id ECEDDDE4 for ; Fri, 1 Nov 2013 16:12:50 +0100 (CET) Received: by mail-we0-f176.google.com with SMTP id w62so4019681wes.7 for ; Fri, 01 Nov 2013 08:13:42 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:organization :user-agent:in-reply-to:references:mime-version :content-transfer-encoding:content-type; bh=/vEbrG9mIjLi5RA1Sa7omKxOM6P9kiGuP4ULc8V3Mk0=; b=PNzdFZGflJxBG11umu/A7Gl9fQ9zYUewro/ICESJQJIlyg5rECvySBYgso1bibiGKz ZCRD6nbC67FrkFh1A8RF8EN4xvNGNvv6H36Me5KwkcjFKhrHhjXNnddKadfNgqdSJSVq 7U68Q+uOCBW+iN2XT1HvyeK5FBtjrozS7lj1RLbnuwz++CGay82pn9fIlRHw37bAbP3u jUxFlSDYDwPl9pmbFAGTe9L6X4agYSky+mckrLjnIFOxTfVJBZqkbY2i/7oHRaPIr9pJ EUaz4hGVYmjNwyl8aN1/ilINecoU1Tw8/hJ+9QmRwexCEUJxoXmCD2UfP+SA8EBPsaEt mjQg== X-Gm-Message-State: ALoCoQnicvxLn/2qe8ABpI91wxALgNLmejfQwHpnJtuvr/dpOkpel6CjF2IQicoAPVmtkdSyOQY6 X-Received: by 10.194.119.106 with SMTP id kt10mr33133wjb.72.1383318822637; Fri, 01 Nov 2013 08:13:42 -0700 (PDT) Received: from x220.localnet (APoitiers-651-1-165-137.w86-201.abo.wanadoo.fr. [86.201.160.137]) by mx.google.com with ESMTPSA id pi6sm8323849wic.3.2013.11.01.08.13.40 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 01 Nov 2013 08:13:41 -0700 (PDT) From: Thomas Monjalon To: "Wang, Shawn" Date: Fri, 01 Nov 2013 16:14:40 +0100 Message-ID: <3485100.RiP6AQCKWQ@x220> Organization: 6WIND User-Agent: KMail/4.11.2 (Linux/3.11.4-1-ARCH; KDE/4.11.2; x86_64; ; ) In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="iso-8859-1" Cc: dev@dpdk.org Subject: Re: [dpdk-dev] Surprisingly high TCP ACK packets drop counter X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 01 Nov 2013 15:12:51 -0000 Hello, 01/11/2013 14:54, Wang, Shawn : > We had the same problem before. It turned out that RSC (receive side > coalescing) is enabled by default in DPDK. So we write this na=EFve p= atch to > disable it. This patch is based on DPDK 1.3. Not sure 1.5 has changed= it > or not. > After this patch, ACK rate should go back to 14.5Mpps. For details, y= ou > can refer to Intel=AE 82599 10 GbE Controller Datasheet. (7.11 Receiv= e Side > Coalescing). Please, could you resend this patch with a properly formatted commit lo= g, in order to review it for integration ? Thank you --=20 Thomas