From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161091AbcBQKeg (ORCPT ); Wed, 17 Feb 2016 05:34:36 -0500 Received: from szxga01-in.huawei.com ([58.251.152.64]:12373 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161041AbcBQKee (ORCPT ); Wed, 17 Feb 2016 05:34:34 -0500 From: Ding Tianhong Subject: Ask some help for the netstat Send-Q To: "David S. Miller" , , "James Morris" , , , Netdev , "linux-kernel@vger.kernel.org" Message-ID: <56C44C9F.8090504@huawei.com> Date: Wed, 17 Feb 2016 18:34:07 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:38.0) Gecko/20100101 Thunderbird/38.5.1 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.177.22.246] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020202.56C44CA7.00D4,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 14405972a70853aa825bd67fe93e3896 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi David S. Miller and maintainers: I use the 4.1.16 kernel to build my system and use the iperf to test the netstat, it looks very strange that the client shows: netstat -at | grep 10.175.112.105 tcp 0 0 10.175.112.191:ssh 10.175.112.105:58400 ESTABLISHED tcp 0 0 10.175.112.191:33230 10.175.112.105:5001 TIME_WAIT tcp 0 4202096 10.175.112.191:33231 10.175.112.105:5001 ESTABLISHED tcp 0 0 10.175.112.191:ssh 10.175.112.105:58335 ESTABLISHED and the speed is: [ 3] 0.0-300.0 sec 32.5 GBytes 929 Mbits/sec It looks like that the speed is fine, But I don't know why the Send-Q has so many buffers, the tcp_wmem is big enough and I couldn't found any difference, did I miss something or is there something wrong for the TCP config? Thanks for any suggestion. Ding