From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by dpdk.org (Postfix) with ESMTP id F09B92C4B for ; Tue, 14 Feb 2017 14:28:19 +0100 (CET) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga105.jf.intel.com with ESMTP; 14 Feb 2017 05:28:17 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.35,161,1484035200"; d="scan'208";a="1126454195" Received: from irsmsx153.ger.corp.intel.com ([163.33.192.75]) by fmsmga002.fm.intel.com with ESMTP; 14 Feb 2017 05:28:17 -0800 Received: from irsmsx112.ger.corp.intel.com (10.108.20.5) by IRSMSX153.ger.corp.intel.com (163.33.192.75) with Microsoft SMTP Server (TLS) id 14.3.248.2; Tue, 14 Feb 2017 13:28:16 +0000 Received: from irsmsx108.ger.corp.intel.com ([169.254.11.173]) by irsmsx112.ger.corp.intel.com ([169.254.1.175]) with mapi id 14.03.0248.002; Tue, 14 Feb 2017 13:28:16 +0000 From: "De Lara Guarch, Pablo" To: Thomas Monjalon , "Hanoch Haim (hhaim)" CC: "dev@dpdk.org" , "Mcnamara, John" , "Ido Barnea (ibarnea)" Thread-Topic: [dpdk-dev] DPDK 17.02 RC-3 performance degradation of ~10% Thread-Index: AQHShrylJkn8jebyMU6+9aFYjj767qFoeFsAgAADw7A= Date: Tue, 14 Feb 2017 13:28:15 +0000 Message-ID: References: <1793839.gziRDArGs7@xps13> In-Reply-To: <1793839.gziRDArGs7@xps13> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-titus-metadata-40: eyJDYXRlZ29yeUxhYmVscyI6IiIsIk1ldGFkYXRhIjp7Im5zIjoiaHR0cDpcL1wvd3d3LnRpdHVzLmNvbVwvbnNcL0ludGVsMyIsImlkIjoiNzkxYzNmZjQtZWVjNi00YWY5LWFkYWYtOTA2MGM4YzdkOTJmIiwicHJvcHMiOlt7Im4iOiJDVFBDbGFzc2lmaWNhdGlvbiIsInZhbHMiOlt7InZhbHVlIjoiQ1RQX0lDIn1dfV19LCJTdWJqZWN0TGFiZWxzIjpbXSwiVE1DVmVyc2lvbiI6IjE1LjkuNi42IiwiVHJ1c3RlZExhYmVsSGFzaCI6Im1naVd5bWhSM3IweW1SeHBxOGNoTWh0K3psM2pZMElOYWFyK1h1cDVSdVE9In0= x-ctpclassification: CTP_IC x-originating-ip: [163.33.239.180] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Subject: Re: [dpdk-dev] DPDK 17.02 RC-3 performance degradation of ~10% X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 14 Feb 2017 13:28:20 -0000 Hi, > -----Original Message----- > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Thomas Monjalon > Sent: Tuesday, February 14, 2017 1:05 PM > To: Hanoch Haim (hhaim) > Cc: dev@dpdk.org; Mcnamara, John; Ido Barnea (ibarnea) > Subject: Re: [dpdk-dev] DPDK 17.02 RC-3 performance degradation of ~10% >=20 > 2017-02-14 12:19, Mcnamara, John: > > From: Hanoch Haim (hhaim) > > > We (trex traffic generator project) upgrade DPDK version from 16.07 t= o > > > 17.02arc-3 and we experienced a performance degradation on the > following > > > NICS: > [...] > > > > Could you do a git-bisect to identify the change that caused this? >=20 > +1 for the bisect. > Please could you try to isolate the change causing the regression? I reproduced the regression for i40e driver (3-4% degradation, not 10%). Th= e commit that caused it was the following: 5ea0942129a4 ("net/i40e: add packet type metadata in vector Rx") This commit was introduced in 16.11, and not in 17.02. This caused some per= formance degradation in the i40e vector RX, due to the addition of packet type parsing in the PM= D. Thanks, Pablo