From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by dpdk.org (Postfix) with ESMTP id 0FB5A683D for ; Tue, 30 Jun 2015 04:01:51 +0200 (CEST) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP; 29 Jun 2015 19:01:25 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.15,374,1432623600"; d="scan'208";a="752907920" Received: from orsmsx101.amr.corp.intel.com ([10.22.225.128]) by fmsmga002.fm.intel.com with ESMTP; 29 Jun 2015 19:01:24 -0700 Received: from orsmsx112.amr.corp.intel.com ([169.254.12.27]) by ORSMSX101.amr.corp.intel.com ([169.254.8.76]) with mapi id 14.03.0224.002; Mon, 29 Jun 2015 19:01:24 -0700 From: "Jiang, Yunhong" To: "dev@dpdk.org" Thread-Topic: Why pktgen-dpdk will receive more packet than sent Thread-Index: AdCy2C8KW0JeJmB0T1WcCHoZEJ5rew== Date: Tue, 30 Jun 2015 02:01:23 +0000 Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.22.254.138] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Subject: [dpdk-dev] Why pktgen-dpdk will receive more packet than sent 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, 30 Jun 2015 02:01:52 -0000 Hi, all I'm trying to test the l2fwd throughput using https://github.com/pktgen/Pk= tgen-DPDK/blob/master/dpdk/examples/pktgen/scripts/rfc2544.lua . However, = the pktgen will receive more packets than it sent out like " Total sent 147= 86446 recv 14786597, delta 151". I'm really confused why this will happen. = I have the pktgen machine and l2fwd machine connected to each other directl= y and bind the igb_uio to the NIC devices. Pktgen> *** Test packet size 64 at rate 100% Total sent 133856261 recv 131517412, delta -2338849 *** Test packet size 64 at rate 50% Total sent 40208555 recv 40207420, delta -1135 *** Test packet size 64 at rate 25% PMD: ixgbe_set_rx_function(): Vector rx enabled, please make sure RX burst = size no less than 32. Total sent 14786446 recv 14786597, delta 151 *** Test packet size 64 at rate 37% PMD: ixgbe_set_rx_function(): Vector rx enabled, please make sure RX burst = size no less than 32. Total sent 26824256 recv 26823587, delta -669 Any hints will be really helpful, thanks! Thanks --jyh