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[204.195.33.123]) by smtp.gmail.com with ESMTPSA id x20sm8223327pge.41.2021.06.29.10.43.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Jun 2021 10:43:38 -0700 (PDT) Date: Tue, 29 Jun 2021 10:43:35 -0700 From: Stephen Hemminger To: "Tyler Blair" Cc: users@dpdk.org Message-ID: <20210629104335.0fb73114@hermes.local> In-Reply-To: <91abe2f9-82e0-45f0-9d7c-d9d5bf70d4f2@www.fastmail.com> References: <91abe2f9-82e0-45f0-9d7c-d9d5bf70d4f2@www.fastmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Subject: Re: [dpdk-users] qdisc errors on 20.11.1 & Azure X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: users-bounces@dpdk.org Sender: "users" On Mon, 28 Jun 2021 07:36:12 -0400 "Tyler Blair" wrote: > Hi, > > I'm seeing what looks like benign errors from qdisc on testpmd & our DPDK app on Azure. I'm wondering if anyone knows of a way to 'fix' these? > > EAL: Detected 8 lcore(s) > EAL: Detected 1 NUMA nodes > EAL: Detected static linkage of DPDK > EAL: Selected IOVA mode 'VA' > EAL: Probing VFIO support... > EAL: VFIO support initialized > EAL: Probe PCI driver: mlx5_pci (15b3:1016) device: 2a8d:00:02.0 (socket 0) > EAL: Probe PCI driver: mlx5_pci (15b3:1016) device: 5ed7:00:02.0 (socket 0) > net_vdev_netvsc: probably using routed NetVSC interface "eth1" (index 3)* > * > *tap_nl_dump_ext_ack(): Cannot delete qdisc with handle of zero** > * > *tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid** > * > *tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid** > * > *tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid** > * > *tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid** > * > *tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid** > * > *tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid** > * > *tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid** > * > *tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid* > [...] > > It's not causing any issues that I can see, I'm just wondering if there's a cause for this in the environment that we can fix so we don't have benign errors showing up. > > Reproduced by running testpmd with no arguments on Azure: > > - OS: Ubuntu 20.04 5.4.0-1048-azure > - DPDK: 20.11.1 (LTS) > - Networking: Azure Accelerated Networking (netvsc) > > OS setup is pretty minimal, nothing special other than DPDK is installed. > > I don't recall these errors happening while on bare metal - only on Azure. > > Thanks! > > Regards, > Tyler In order to support the tap flow emulation you need to hve the ingress qdisc and the flower qdisc. Some of the Linux distros have packaged those into kernels extras type packages. Or just use netvsc PMD and avoid the problem.