From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from na01-bl2-obe.outbound.protection.outlook.com (mail-bl2on0060.outbound.protection.outlook.com [65.55.169.60]) by dpdk.org (Postfix) with ESMTP id 06A16958E for ; Thu, 7 Jan 2016 10:40:12 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=SonusNetworks.onmicrosoft.com; s=selector1-sonusnet-com; h=From:To:Date:Subject:Message-ID:Content-Type:MIME-Version; bh=c5fMS7Kh3T2WFf/qWfhhkoUo/GIvSNGVIBBE49aToAs=; b=mIDq301pscBzoKgLmbllFf8YlNYml6LbF5lhl4IrlmI/RqFUOBmqG0kw9FEcRklQpYJwew+5i3ldJaML0ppdLWR9qKnOFLTWbvlnCtNQ5W+UjZ32JP/0FwAE2igT65xKe6rD1RazT+4PBytKBXfp/k2qcVz32W5iq/Milsvf4TU= Received: from BN3PR0301MB1202.namprd03.prod.outlook.com (10.161.207.155) by BN3PR0301MB1203.namprd03.prod.outlook.com (10.161.207.156) with Microsoft SMTP Server (TLS) id 15.1.361.13; Thu, 7 Jan 2016 09:40:09 +0000 Received: from BN3PR0301MB1202.namprd03.prod.outlook.com ([10.161.207.155]) by BN3PR0301MB1202.namprd03.prod.outlook.com ([10.161.207.155]) with mapi id 15.01.0361.006; Thu, 7 Jan 2016 09:40:09 +0000 From: "Dey, Souvik" To: "Tan, Jianfeng" , "dev@dpdk.org" Thread-Topic: tx_burst errors seen with virtual pmds Thread-Index: AdFJEroo/Pehexp0S+W2DmX07vcsDQAFJJZwAAIDR+A= Date: Thu, 7 Jan 2016 09:40:08 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=sodey@sonusnet.com; x-originating-ip: [121.242.142.135] x-microsoft-exchange-diagnostics: 1; BN3PR0301MB1203; 5:BBLv5++dR/8KzflPM91k9SRjIdorcvUvb8PCdxVKGBweF8XofYsJnQ7+/+wvSr9Ri0dGpcE/9AFyt9xyVkMeqppZztJqd69buA7XHCtw36pK6b6xZQ1AY3A6yuiC5ZDrH/z2a4QXW9EG3vkboKUWoA==; 24:3RrndfkixNWTSmgNOkD08xm056ndXhFB6J7zkyWMwFvie8tGYmMMHyPZbx6gNnW0JuOluZIjvT5XieZeHnRCgFkvHdB/XVszls6VKMHEpNA= x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:BN3PR0301MB1203; x-ms-office365-filtering-correlation-id: 26d2cdf6-d5f8-4909-c167-08d317468891 x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:; x-exchange-antispam-report-cfa-test: BCL:0; PCL:0; RULEID:(601004)(2401047)(5005006)(8121501046)(520078)(10201501046)(3002001); SRVR:BN3PR0301MB1203; BCL:0; PCL:0; RULEID:; SRVR:BN3PR0301MB1203; x-forefront-prvs: 0814A2C7A3 x-forefront-antispam-report: SFV:NSPM; SFS:(10009020)(6009001)(164054003)(53754006)(199003)(189002)(13464003)(377454003)(81156007)(586003)(11100500001)(3846002)(87936001)(5003600100002)(106356001)(102836003)(189998001)(1096002)(2501003)(97736004)(40100003)(2950100001)(5008740100001)(77096005)(101416001)(19580405001)(5002640100001)(76576001)(66066001)(2906002)(1220700001)(54356999)(107886002)(5001770100001)(86362001)(19580395003)(6116002)(10400500002)(74316001)(122556002)(50986999)(5001960100002)(5004730100002)(2900100001)(76176999)(99286002)(105586002)(33656002)(92566002); DIR:OUT; SFP:1101; SCL:1; SRVR:BN3PR0301MB1203; H:BN3PR0301MB1202.namprd03.prod.outlook.com; FPR:; SPF:None; PTR:InfoNoRecords; A:1; MX:1; LANG:en; received-spf: None (protection.outlook.com: sonusnet.com does not designate permitted sender hosts) spamdiagnosticoutput: 1:23 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: sonusnet.com X-MS-Exchange-CrossTenant-originalarrivaltime: 07 Jan 2016 09:40:08.9993 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 29a671dc-ed7e-4a54-b1e5-8da1eb495dc3 X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN3PR0301MB1203 Subject: Re: [dpdk-dev] tx_burst errors seen with virtual pmds 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: Thu, 07 Jan 2016 09:40:12 -0000 So is there no resolution to this issue ? -----Original Message----- From: Tan, Jianfeng [mailto:jianfeng.tan@intel.com]=20 Sent: Thursday, January 07, 2016 2:18 PM To: Dey, Souvik ; dev@dpdk.org Subject: RE: tx_burst errors seen with virtual pmds Hi Souvik, > -----Original Message----- > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Dey, Souvik > Sent: Thursday, January 7, 2016 2:15 PM > To: dev@dpdk.org > Subject: [dpdk-dev] tx_burst errors seen with virtual pmds >=20 > Hi All, > While trying call load with virtio_pmd/vmxnet3_pmd , I=20 > am seeing that at around 100Mbps, we are having tx_burst errors. We=20 > are currently using DPDK 2.1 and send 1 packet at a time. When we try=20 > the same with ixgbe_vf we are not seeing similar drops. Is there any=20 > issues with the virtual pmds which is causing this tx drops. We are=20 > using tx descriptor as 1024 and 1 tx queue to send out packets. >=20 > -- > Regards, > Souvik IMO, for virtio and vmxnet3, there's a frontend in guest and a backend in h= ost. And mostly, backend driver does the data copies, which spends more CPU than= frontend. So the tx descriptor queue could be always full, which leads to = tx error. Thanks, Jianfeng