From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from emea01-db3-obe.outbound.protection.outlook.com (mail-db3on0134.outbound.protection.outlook.com [157.55.234.134]) by dpdk.org (Postfix) with ESMTP id CD8478D8A for ; Wed, 30 Sep 2015 08:40:25 +0200 (CEST) Received: from AM4PR06MB1537.eurprd06.prod.outlook.com (10.164.80.151) by AM4PR06MB1539.eurprd06.prod.outlook.com (10.164.80.153) with Microsoft SMTP Server (TLS) id 15.1.280.20; Wed, 30 Sep 2015 06:40:24 +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; Wed, 30 Sep 2015 06:40:24 +0000 From: Yan Fridland To: "dev@dpdk.org" Thread-Topic: [dpdk-dev] Performance issue when running DPDK on Fedora Thread-Index: AdD6ygUZePJDlogCT9W0teDmrunzMwAgD4RA Date: Wed, 30 Sep 2015 06:40:24 +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; AM4PR06MB1539; 5:IEGNb8ZrFltyW9FwrDh45/qLBBeLXF/rYiIiZJFCkz53OrT/UYZriVP6Bxd0pDbqKGZLZQJg+wlLVAPCHt4vjVZlNrThE2CUSZN05iZj2UzShoRdIDF7V5ZMnxzLNc0mxc1cT6VAWy7WNyHaO9g31g==; 24:0aM0/TOI/0NQO/zuhimuc7uHgUYo5mjHwKeBeKtq1N0W0TEsa50SXnRW9SO3XCHMhf2me5xm7YZpFZIU1RZJZ5IzH3sd+HIsCTw7ccDGcPg=; 20:6Ns4nBqTQvdce5PWyzLeKT12AkceJWZAYD7fh0DRItCuajQ3pBhksDu6BhG6L+dYWwapAtKVULj7eKL1uE6tfg== x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:AM4PR06MB1539; x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:; x-exchange-antispam-report-cfa-test: BCL:0; PCL:0; RULEID:(601004)(2401047)(5005006)(520078)(8121501046)(3002001); SRVR:AM4PR06MB1539; BCL:0; PCL:0; RULEID:; SRVR:AM4PR06MB1539; x-forefront-prvs: 071518EF63 x-forefront-antispam-report: SFV:NSPM; SFS:(10019020)(6009001)(199003)(51164003)(189002)(551934003)(101416001)(2501003)(450100001)(77156002)(62966003)(76576001)(92566002)(2900100001)(87936001)(54356999)(40100003)(5004730100002)(5007970100001)(122556002)(11100500001)(77096005)(10400500002)(33656002)(68736005)(46102003)(5001960100002)(5002640100001)(189998001)(107886002)(110136002)(106356001)(2351001)(5008740100001)(86362001)(5001830100001)(66066001)(5001860100001)(97736004)(102836002)(50986999)(74316001)(64706001)(81156007)(4001540100001)(5003600100002)(105586002); DIR:OUT; SFP:1102; SCL:1; SRVR:AM4PR06MB1539; H:AM4PR06MB1537.eurprd06.prod.outlook.com; FPR:; SPF:None; PTR:InfoNoRecords; A:1; MX: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: 30 Sep 2015 06:40:24.5282 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 09a71e5b-e130-419f-bde2-1e8422f00aaa X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM4PR06MB1539 Subject: [dpdk-dev] FW: 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: Wed, 30 Sep 2015 06:40:26 -0000 Hello DPDK developers, 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. Any suggestions will be highly appreciated. Thank you, Yan=20