From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Abeni Subject: Re: [PATCH net-next] udp: handle gro_receive only when necessary Date: Mon, 18 Dec 2017 15:45:30 +0100 Message-ID: <1513608330.8795.7.camel@redhat.com> References: <20171218041107.30483-1-zhanglkk1990@163.com> <1513592788.4533.5.camel@redhat.com> <1f4bfef5.b4c7.16069879c26.Coremail.zhanglkk1990@163.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: davem@davemloft.net, netdev@vger.kernel.org, zhangliping To: zhangliping Return-path: Received: from mx1.redhat.com ([209.132.183.28]:48098 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752954AbdLROpc (ORCPT ); Mon, 18 Dec 2017 09:45:32 -0500 In-Reply-To: <1f4bfef5.b4c7.16069879c26.Coremail.zhanglkk1990@163.com> Sender: netdev-owner@vger.kernel.org List-ID: On Mon, 2017-12-18 at 20:09 +0800, zhangliping wrote: > My test case is very simple, two VMs were connected via ovs + dpdk. > Inside VM, rps is enabled. Then one VM runs "iperf -s -u &", another > VM runs "iperf -c 1.1.1.2 -P 12 -u -b 10Gbps -l 40 -t 36000". Understood, thanks. Still the time spent in 'udp4_lib_lookup2' looks quite different/higher than what I observe in my tests. Are you using x86_64? if not, do you see many cache misses in udp4_lib_lookup2? Thanks, Paolo