From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Monjalon Subject: Re: Surprisingly high TCP ACK packets drop counter Date: Fri, 01 Nov 2013 16:14:40 +0100 Message-ID: <3485100.RiP6AQCKWQ@x220> References: Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Cc: dev-VfR2kkLFssw@public.gmane.org To: "Wang, Shawn" Return-path: In-Reply-To: List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces-VfR2kkLFssw@public.gmane.org Sender: "dev" 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