From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3C580E95A67 for ; Sun, 8 Oct 2023 07:19:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229988AbjJHHTs (ORCPT ); Sun, 8 Oct 2023 03:19:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33540 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229966AbjJHHTs (ORCPT ); Sun, 8 Oct 2023 03:19:48 -0400 Received: from out30-119.freemail.mail.aliyun.com (out30-119.freemail.mail.aliyun.com [115.124.30.119]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6B981B9; Sun, 8 Oct 2023 00:19:45 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R471e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045176;MF=guwen@linux.alibaba.com;NM=1;PH=DS;RN=17;SR=0;TI=SMTPD_---0VtdMUrf_1696749581; Received: from 30.221.129.17(mailfrom:guwen@linux.alibaba.com fp:SMTPD_---0VtdMUrf_1696749581) by smtp.aliyun-inc.com; Sun, 08 Oct 2023 15:19:42 +0800 Message-ID: Date: Sun, 8 Oct 2023 15:19:40 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0) Gecko/20100101 Thunderbird/102.15.1 Subject: Re: [PATCH net-next v4 00/18] net/smc: implement virtual ISM extension and loopback-ism To: Niklas Schnelle , kgraul@linux.ibm.com, wenjia@linux.ibm.com, jaka@linux.ibm.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Cc: wintera@linux.ibm.com, gbayer@linux.ibm.com, pasic@linux.ibm.com, alibuda@linux.alibaba.com, tonylu@linux.alibaba.com, dust.li@linux.alibaba.com, linux-s390@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org References: <1695568613-125057-1-git-send-email-guwen@linux.alibaba.com> From: Wen Gu In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-s390@vger.kernel.org On 2023/10/5 16:21, Niklas Schnelle wrote: > > Hi Wen Gu, > > I've been trying out your series with iperf3, qperf, and uperf on > s390x. I'm using network namespaces with a ConnectX VF from the same > card in each namespace for the initial TCP/IP connection i.e. initially > it goes out to a real NIC even if that can switch internally. All of > these look great for streaming workloads both in terms of performance > and stability. With a Connect-Request-Response workload and uperf > however I've run into issues. The test configuration I use is as > follows: > > Client Command: > > # host=$ip_server ip netns exec client smc_run uperf -m tcp_crr.xml > > Server Command: > > # ip netns exec server smc_run uperf -s &> /dev/null > > Uperf tcp_crr.xml: > > > > > > > > > > > > > > The workload first runs fine but then after about 4 GB of data > transferred fails with "Connection refused" and "Connection reset by > peer" errors. The failure is not permanent however and re-running > the streaming workloads run fine again (with both uperf server and > client restarted). So I suspect something gets stuck in either the > client or server sockets. The same workload runs fine with TCP/IP of > course. > > Thanks, > Niklas > > Hi Niklas, Thank you very much for the test. With the test example you provided, I've reproduced the issue in my VM. And moreover, sometimes the test complains with 'Error saying goodbye with ' I'll figure out what's going on here. Thanks! Wen Gu