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 X-Spam-Level: X-Spam-Status: No, score=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F1DB6C4363A for ; Thu, 22 Oct 2020 10:51:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A634822267 for ; Thu, 22 Oct 2020 10:51:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2502517AbgJVKvE (ORCPT ); Thu, 22 Oct 2020 06:51:04 -0400 Received: from m9785.mail.qiye.163.com ([220.181.97.85]:1213 "EHLO m9785.mail.qiye.163.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2896645AbgJVKtE (ORCPT ); Thu, 22 Oct 2020 06:49:04 -0400 Received: from [192.168.188.14] (unknown [106.75.220.2]) by m9785.mail.qiye.163.com (Hmail) with ESMTPA id AF9F95C1BD9; Thu, 22 Oct 2020 18:41:01 +0800 (CST) Subject: mlx5_vdpa problem References: <401b2eb1-f77b-f7d5-8d6f-03ec30e81d6a@ucloud.cn> To: Eli Cohen Cc: Linux Kernel Network Developers From: wenxu X-Forwarded-Message-Id: <401b2eb1-f77b-f7d5-8d6f-03ec30e81d6a@ucloud.cn> Message-ID: <258f86a8-d6ae-010a-11f8-c155b1df4723@ucloud.cn> Date: Thu, 22 Oct 2020 18:40:56 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.12.1 MIME-Version: 1.0 In-Reply-To: <401b2eb1-f77b-f7d5-8d6f-03ec30e81d6a@ucloud.cn> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Content-Language: en-US X-HM-Spam-Status: e1kfGhgUHx5ZQUtXWQgYFAkeWUFZS1VLWVdZKFlBSUI3V1ktWUFJV1kPCR oVCBIfWUFZSUNJGkhJTE5NQh1KVkpNS0hITUhJTUpDSE1VGRETFhoSFyQUDg9ZV1kWGg8SFR0UWU FZT0tIVUpKS09ISVVLWQY+ X-HM-Sender-Digest: e1kMHhlZQR0aFwgeV1kSHx4VD1lBWUc6MCo6NAw4Nz5CFUkxFj8DGEkO ECwKCyxVSlVKTUtISE1ISU1JSkpNVTMWGhIXVQweFQMOOw4YFxQOH1UYFUVZV1kSC1lBWUpLTVVM TlVJSUtVSVlXWQgBWUFITEpINwY+ X-HM-Tid: 0a754fe5cd552087kuqyaf9f95c1bd9 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hi mellanox team, I test the mlx5 vdpa  in linux-5.9 and meet several problem. # lspci | grep Ether | grep Dx b3:00.0 Ethernet controller: Mellanox Technologies MT2892 Family [ConnectX-6 Dx] b3:00.1 Ethernet controller: Mellanox Technologies MT2892 Family [ConnectX-6 Dx] # ethtool -i net2 driver: mlx5e_rep version: 5.9.0 firmware-version: 22.28.1002 (MT_0000000430) expansion-rom-version: bus-info: 0000:b3:00.0 supports-statistics: yes supports-test: no supports-eeprom-access: no supports-register-dump: no supports-priv-flags: no init switchdev: # echo 1 > /sys/class/net/net2/device/sriov_numvfs # echo 0000:b3:00.2 > /sys/bus/pci/drivers/mlx5_core/unbind # devlink dev eswitch set pci/0000:b3:00.0  mode switchdev encap enable # modprobe vdpa vhost-vdpa mlx5_vdpa # ip l set dev net2 vf 0 mac 52:90:01:00:02:13 # echo 0000:b3:00.2 > /sys/bus/pci/drivers/mlx5_core/bind setup vm: # qemu-system-x86_64 -name test  -enable-kvm -smp 16,sockets=2,cores=8,threads=1 -m 8192 -drive file=./centos7.qcow2,format=qcow2,if=none,id=drive-virtio-disk0 -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x7,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -netdev type=vhost-vdpa,vhostdev=/dev/vhost-vdpa-0,id=vhost-vdpa0 -device virtio-net-pci,netdev=vhost-vdpa0,page-per-vq=on,iommu_platform=on,id=net0,bus=pci.0,addr=0x3,disable-legacy=on -vnc 0.0.0.0:0 In the vm:  virtio net device  eth0 with ip address 10.0.0.75/24 On the host: VF0 rep device pf0vf0 with ip address 10.0.0.7/24 problem 1: On the host: # ping 10.0.0.75 Some times there will be loss packets. And in the VM: dmesg shows: eth0: bad tso: type 100, size: 0 eth0: bad tso: type 10, size: 28 So I think maybe the vnet header is not init with 0?  And Then I clear the gso_type, gso_size and flags in the virtio_net driver.  There is no packets dropped. problem 2: In the vm: iperf -s On the host: iperf -c 10.0.0.75 -t 100 -i 2. The tcp connection can't established for the syn+ack with partail cum but not handle correct by hardware. After I set the csum off  for eth0 in the vm, the problem is resolved. Although the mlx5_vnet support VIRTIO_NET_F_CSUM feature. problem 3: The iperf perofrmance not stable before I disable the pf0vf0 tso offload #ethtool -K pf0vf0 tso off I know the mlx5_vnet did not support feature VIRTIO_NET_F_GUEST_TSO4. But the hardware can't  cut the big tso packet to several small tcp packet and send to virtio  net device? BR wenxu