From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by dpdk.org (Postfix) with ESMTP id 109648043 for ; Tue, 16 Dec 2014 12:07:42 +0100 (CET) Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga102.fm.intel.com with ESMTP; 16 Dec 2014 03:07:41 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,862,1389772800"; d="scan'208";a="429593497" Received: from kmsmsx153.gar.corp.intel.com ([172.21.73.88]) by FMSMGA003.fm.intel.com with ESMTP; 16 Dec 2014 02:56:36 -0800 Received: from shsmsx103.ccr.corp.intel.com (10.239.110.14) by KMSMSX153.gar.corp.intel.com (172.21.73.88) with Microsoft SMTP Server (TLS) id 14.3.195.1; Tue, 16 Dec 2014 19:07:39 +0800 Received: from shsmsx104.ccr.corp.intel.com ([169.254.5.182]) by SHSMSX103.ccr.corp.intel.com ([169.254.4.240]) with mapi id 14.03.0195.001; Tue, 16 Dec 2014 19:07:38 +0800 From: "Zhang, Helin" To: Thomas Monjalon Thread-Topic: [dpdk-dev] [PATCH v3] i40e: workaround for X710 performance issues Thread-Index: AQHQGQuSrKEcRgxC2UeCYrb52mEW4pySDkPQ Date: Tue, 16 Dec 2014 11:07:38 +0000 Message-ID: References: <1418630187-28917-1-git-send-email-helin.zhang@intel.com> <1418718200-31924-1-git-send-email-helin.zhang@intel.com> <2702920.KlIrzH6BZs@xps13> In-Reply-To: <2702920.KlIrzH6BZs@xps13> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.239.127.40] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Cc: "dev@dpdk.org" , "Rowden, Aaron F" Subject: Re: [dpdk-dev] [PATCH v3] i40e: workaround for X710 performance issues 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: Tue, 16 Dec 2014 11:07:43 -0000 > -----Original Message----- > From: Thomas Monjalon [mailto:thomas.monjalon@6wind.com] > Sent: Tuesday, December 16, 2014 4:37 PM > To: Zhang, Helin > Cc: dev@dpdk.org; Rowden, Aaron F; Chen, Jing D > Subject: Re: [dpdk-dev] [PATCH v3] i40e: workaround for X710 performance > issues >=20 > Hi Helin, >=20 > First, thank you and Jing for the excellent review process. >=20 > 2014-12-16 16:23, Helin Zhang: > > On X710, performance number is far from the expectation on recent > > firmware versions. The fix for this issue may not be integrated in the > > following firmware version. So the workaround in software driver is > > needed. It needs to modify the initial values of 3 internal only > > registers. Note that the workaround can be removed when it is fixed in > > firmware in the future. >=20 > I want to understand something here. You say the workaround can be remove= d > when firmware will be fixed. But I suppose that some NICs won't be update= d so > the workaround will be needed forever? Yes, it is possible. Let me check with our NIC marketing guys of their firm= ware update strategy before removing it. Now it is quite useful for high performance. Thank you very much for pointi= ng out this! Regards, Helin >=20 > -- > Thomas