From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by dpdk.org (Postfix) with ESMTP id 34BAE5958 for ; Wed, 9 Sep 2015 15:19:41 +0200 (CEST) Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga103.fm.intel.com with ESMTP; 09 Sep 2015 06:19:40 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,496,1437462000"; d="scan'208";a="785817114" Received: from irsmsx102.ger.corp.intel.com ([163.33.3.155]) by fmsmga001.fm.intel.com with ESMTP; 09 Sep 2015 06:19:39 -0700 Received: from irsmsx112.ger.corp.intel.com (10.108.20.5) by IRSMSX102.ger.corp.intel.com (163.33.3.155) with Microsoft SMTP Server (TLS) id 14.3.224.2; Wed, 9 Sep 2015 14:19:38 +0100 Received: from irsmsx105.ger.corp.intel.com ([169.254.7.51]) by irsmsx112.ger.corp.intel.com ([169.254.1.110]) with mapi id 14.03.0224.002; Wed, 9 Sep 2015 14:19:38 +0100 From: "Ananyev, Konstantin" To: Thomas Monjalon , "Zhang, Helin" Thread-Topic: [dpdk-dev] [PATCH v1] ixgbe_pmd: forbid tx_rs_thresh above 1 for all NICs but 82598 Thread-Index: AQHQ6vnra62GclTPEEqwB0/xvosZKp40LHvg Date: Wed, 9 Sep 2015 13:19:38 +0000 Message-ID: <2601191342CEEE43887BDE71AB97725836A84B75@irsmsx105.ger.corp.intel.com> References: <1439489195-31553-1-git-send-email-vladz@cloudius-systems.com> <9837353.xdQKzFi908@xps13> In-Reply-To: <9837353.xdQKzFi908@xps13> Accept-Language: en-IE, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [163.33.239.182] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Cc: "dev@dpdk.org" Subject: Re: [dpdk-dev] [PATCH v1] ixgbe_pmd: forbid tx_rs_thresh above 1 for all NICs but 82598 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: Wed, 09 Sep 2015 13:19:41 -0000 Hi Thomas, > -----Original Message----- > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Thomas Monjalon > Sent: Wednesday, September 09, 2015 1:19 PM > To: Zhang, Helin > Cc: dev@dpdk.org > Subject: Re: [dpdk-dev] [PATCH v1] ixgbe_pmd: forbid tx_rs_thresh above 1= for all NICs but 82598 >=20 > 2015-08-25 20:13, Zhang, Helin: > > Yes, I got the perfect answers. Thank you very much! > > I just wanted to make sure the test case was OK with the limit of maxim= um number of descriptors, as I heard there is a hang issue on > other NICs of using more descriptors than hardware allowed. > > OK. I am still waiting for the answers/confirmation from x540 hardware = designers. We need all agree on your patches to avoid risks. >=20 > Helin, any news? > Can we apply v4 of this patch? Unfortunately we are seeing a huge performance drop with that patch: On my box bi-directional traffic (64B packet) over one port can't reach eve= n 11 Mpps. We are still doing some experiments and consultations with ND guys how we c= an overcome this problem and keep performance intact. Konstantin