From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [119.145.14.65]) by dpdk.org (Postfix) with ESMTP id 8A58D20F for ; Fri, 6 Feb 2015 06:37:10 +0100 (CET) Received: from 172.24.2.119 (EHLO SZXEML429-HUB.china.huawei.com) ([172.24.2.119]) by szxrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id CGX84327; Fri, 06 Feb 2015 13:37:08 +0800 (CST) Received: from [127.0.0.1] (10.177.19.115) by SZXEML429-HUB.china.huawei.com (10.82.67.184) with Microsoft SMTP Server id 14.3.158.1; Fri, 6 Feb 2015 13:37:06 +0800 Message-ID: <54D452FF.3080005@huawei.com> Date: Fri, 6 Feb 2015 13:37:03 +0800 From: Linhaifeng User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:31.0) Gecko/20100101 Thunderbird/31.1.0 MIME-Version: 1.0 To: "dpdk >> dev@dpdk.org" Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.177.19.115] X-CFilter-Loop: Reflected Subject: [dpdk-dev] ixgbe:about latency 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: Fri, 06 Feb 2015 05:37:11 -0000 Hi, I used l2fwd to test ixgbe PMD's latency (packet length is 64 bytes) found an interesting thing that latency is about 22us when tx bits rate is 4M and latency is 103us when tx bits rate is 5M. Who can tell me why?Is it a bug? Thank you very much! -- Regards, Haifeng