From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from emea01-am1-obe.outbound.protection.outlook.com (mail-am1on0106.outbound.protection.outlook.com [157.56.112.106]) by dpdk.org (Postfix) with ESMTP id 26C46B62 for ; Tue, 29 Sep 2015 17:50:27 +0200 (CEST) Received: from AM4PR06MB1537.eurprd06.prod.outlook.com (10.164.80.151) by AM4PR06MB1537.eurprd06.prod.outlook.com (10.164.80.151) with Microsoft SMTP Server (TLS) id 15.1.280.20; Tue, 29 Sep 2015 15:50:25 +0000 Received: from AM4PR06MB1537.eurprd06.prod.outlook.com ([10.164.80.151]) by AM4PR06MB1537.eurprd06.prod.outlook.com ([10.164.80.151]) with mapi id 15.01.0280.017; Tue, 29 Sep 2015 15:50:25 +0000 From: Yan Fridland To: Thomas Monjalon Thread-Topic: [dpdk-dev] Performance issue when running DPDK on Fedora Thread-Index: AdD6ygUZePJDlogCT9W0teDmrunzMw== Date: Tue, 29 Sep 2015 15:50:25 +0000 Message-ID: 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=yan@asocsnetworks.com; x-originating-ip: [213.57.153.178] x-microsoft-exchange-diagnostics: 1; AM4PR06MB1537; 5:hNKYBhC5odfrEqfMRQYmzguoVGkpq0wxG2srF6KT9WS6vhYSVyHZx4YbvY6SoXjusX6CxxDx4d24ModihcBUbGX+Ea7lZMpnwMAeSGjAVcGc6cbdej1uuadyU6skgPm178b7FHEIQcmsROgnZv6tEw==; 24:8weQe6U+tEu1aHkiHLOG1LTh22ieyaoS2oylEItWW0Ke7PisEbRLIm812UrgLc56tK2p5bTemuSak1E28SVbw2YIUjQRemtTtq5qKYjEmpk=; 20:Lm2Gv6dS4XlhkUheUlkp2qHrS8dsr3L07XqChFeHNxEgV48bC8ADkkxEaxAk1nygENy8LbRNanAdM+PT6+w7oA== x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:AM4PR06MB1537; x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:; x-exchange-antispam-report-cfa-test: BCL:0; PCL:0; RULEID:(601004)(2401047)(8121501046)(520078)(5005006)(3002001); SRVR:AM4PR06MB1537; BCL:0; PCL:0; RULEID:; SRVR:AM4PR06MB1537; x-forefront-prvs: 0714841678 x-forefront-antispam-report: SFV:NSPM; SFS:(10019020)(6009001)(189002)(199003)(51164003)(33656002)(97736004)(46102003)(62966003)(2900100001)(122556002)(551934003)(66066001)(189998001)(68736005)(11100500001)(110136002)(77096005)(101416001)(102836002)(10400500002)(5001960100002)(5002640100001)(5003600100002)(106356001)(40100003)(74316001)(86362001)(229853001)(105586002)(76576001)(5001830100001)(92566002)(5004730100002)(87936001)(4001540100001)(50986999)(5007970100001)(5001860100001)(64706001)(81156007)(54356999)(77156002)(5008740100001); DIR:OUT; SFP:1102; SCL:1; SRVR:AM4PR06MB1537; H:AM4PR06MB1537.eurprd06.prod.outlook.com; FPR:; SPF:None; PTR:InfoNoRecords; MX:1; A:1; LANG:en; received-spf: None (protection.outlook.com: asocsnetworks.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: asocsnetworks.com X-MS-Exchange-CrossTenant-originalarrivaltime: 29 Sep 2015 15:50:25.7400 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 09a71e5b-e130-419f-bde2-1e8422f00aaa X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM4PR06MB1537 Cc: "dev@dpdk.org" Subject: [dpdk-dev] Performance issue when running DPDK on Fedora 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, 29 Sep 2015 15:50:27 -0000 Hi Thomas I am running a simple dpdk application on 2 VMs running on 2 different host= s. Each VM has a single port bound to a DPDK's ixgbevf module and the port= s are connected to allow a traffic transaction. Both VMs are running on KVM= hypervisor on Fedora. The test is quite simple, one of the VMs generates a= 1500 byte packets and sends them to another VM that simply returns them ba= ck with no processing at all. For each packet I am measuring a roundtrip ti= me for a latency analysis. According to the results I see exactly the same pattern in all the tests: 9= 9% of the packets have a roundtrip time around 55usec when there are always= several packets that have a round trip over a 1msec that is totally unacce= ptable in my application. Can you please advise what should be done on a DPDK / KVM / Linux basis in = order to improve this result. Thanks Yan=20