<div dir="ltr"><pre style="font-size:13px;color:rgb(0,0,0)"><pre style="text-wrap: wrap;">Hello, I am trying to set up dpdk with netvsc as master pmd on Azure following <a href="https://learn.microsoft.com/en-us/azure/virtual-network/setup-dpdk?tabs=ubuntu">https://learn.microsoft.com/en-us/azure/virtual-network/setup-dpdk?tabs=ubuntu</a> and <a href="https://doc.dpdk.org/guides-22.11/nics/netvsc.html">https://doc.dpdk.org/guides-22.11/nics/netvsc.html</a>.</pre><pre style="text-wrap: wrap;"><pre style="text-wrap: wrap;"> </pre><pre style="text-wrap: wrap;">On the Azure VM, I have a LAN and a WAN interface with accelerated networking enabled.I have unbound both the VMBUS devices from the kernel and bound it to uio_hv_generic.The DPDK version is 22.11 running on openwrt 5.15.150.</pre></pre><pre style="text-wrap: wrap;">When I try running testpmd in io mode to send and receive traffic between LAN and WAN port, I notice very low throughput. Please find the testpmd command and stats below:</pre><pre style="text-wrap: wrap;">/opt/vc/bin/dpdk-testpmd -l 1-3 -n 1 -a f030:00:02.0 -a 2334:00:02.0 -- --rxq=1 --txq=1 -i EAL: Detected CPU lcores: 8 EAL: Detected NUMA nodes: 1 EAL: Detected static linkage of DPDK EAL: Multi-process socket /var/run/dpdk/rte/mp_socket EAL: Selected IOVA mode 'PA' EAL: Debug dataplane logs available - lower performance EAL: VFIO support initialized EAL: Probe PCI driver: mlx5_pci (15b3:1016) device: 2334:00:02.0 (socket -1) mlx5_net: No available register for sampler. EAL: Probe PCI driver: mlx5_pci (15b3:1016) device: f030:00:02.0 (socket -1) mlx5_net: No available register for sampler. hn_vf_attach(): found matching VF port 0 hn_vf_attach(): found matching VF port 1 TELEMETRY: No legacy callbacks, legacy socket not created Interactive-mode selected testpmd: create a new mbuf pool <mb_pool_0>: n=326912, size=2560, socket=0 testpmd: preferred mempool ops selected: ring_mp_mc Configuring Port 2 (socket 0) Port 2: 00:0D:3A:42:F8:3C Configuring Port 3 (socket 0) Port 3: 00:0D:3A:42:FB:CD Checking link statuses... Done testpmd> start tx_first io packet forwarding - ports=2 - cores=1 - streams=2 - NUMA support enabled, MP allocation mode: native Logical Core 2 (socket 0) forwards packets on 2 streams: RX P=2/Q=0 (socket 0) -> TX P=3/Q=0 (socket 0) peer=02:00:00:00:00:03 RX P=3/Q=0 (socket 0) -> TX P=2/Q=0 (socket 0) peer=02:00:00:00:00:02 io packet forwarding packets/burst=32 nb forwarding cores=1 - nb forwarding ports=2 port 2: RX queue number: 1 Tx queue number: 1 Rx offloads=0x0 Tx offloads=0x0 RX queue: 0 RX desc=256 - RX free threshold=0 RX threshold registers: pthresh=0 hthresh=0 wthresh=0 RX Offloads=0x0 TX queue: 0 TX desc=256 - TX free threshold=0 TX threshold registers: pthresh=0 hthresh=0 wthresh=0 TX offloads=0x0 - TX RS bit threshold=0 port 3: RX queue number: 1 Tx queue number: 1 Rx offloads=0x0 Tx offloads=0x0 RX queue: 0 RX desc=256 - RX free threshold=0 RX threshold registers: pthresh=0 hthresh=0 wthresh=0 RX Offloads=0x0 TX queue: 0 TX desc=256 - TX free threshold=0 TX threshold registers: pthresh=0 hthresh=0 wthresh=0 TX offloads=0x0 - TX RS bit threshold=0 testpmd> show port stats all ######################## NIC statistics for port 2 ######################## RX-packets: 34 RX-missed: 0 RX-bytes: 2194 RX-errors: 0 RX-nombuf: 0 TX-packets: 32 TX-errors: 0 TX-bytes: 2048 Throughput (since last show) Rx-pps: 0 Rx-bps: 0 Tx-pps: 0 Tx-bps: 0 ############################################################################ ######################## NIC statistics for port 3 ######################## RX-packets: 1 RX-missed: 0 RX-bytes: 86 RX-errors: 0 RX-nombuf: 0 TX-packets: 64 TX-errors: 0 TX-bytes: 4096 Throughput (since last show) Rx-pps: 0 Rx-bps: 0 Tx-pps: 0 Tx-bps: 0 ############################################################################ testpmd> show port stats all ######################## NIC statistics for port 2 ######################## RX-packets: 34 RX-missed: 0 RX-bytes: 2194 RX-errors: 0 RX-nombuf: 0 TX-packets: 32 TX-errors: 0 TX-bytes: 2048 Throughput (since last show) Rx-pps: 0 Rx-bps: 0 Tx-pps: 0 Tx-bps: 0 ############################################################################ ######################## NIC statistics for port 3 ######################## RX-packets: 1 RX-missed: 0 RX-bytes: 86 RX-errors: 0 RX-nombuf: 0 TX-packets: 64 TX-errors: 0 TX-bytes: 4096 Throughput (since last show) Rx-pps: 0 Rx-bps: 0 Tx-pps: 0 Tx-bps: 0 ############################################################################ testpmd> show port stats all ######################## NIC statistics for port 2 ######################## RX-packets: 34 RX-missed: 0 RX-bytes: 2194 RX-errors: 0 RX-nombuf: 0 TX-packets: 32 TX-errors: 0 TX-bytes: 2048 Throughput (since last show) Rx-pps: 0 Rx-bps: 0 Tx-pps: 0 Tx-bps: 0 ############################################################################ ######################## NIC statistics for port 3 ######################## RX-packets: 1 RX-missed: 0 RX-bytes: 86 RX-errors: 0 RX-nombuf: 0 TX-packets: 64 TX-errors: 0 TX-bytes: 4096 Throughput (since last show) Rx-pps: 0 Rx-bps: 0 Tx-pps: 0 Tx-bps: 0 ############################################################################ testpmd> quit Telling cores to stop... Waiting for lcores to finish... ---------------------- Forward statistics for port 2 ---------------------- RX-packets: 32 RX-dropped: 0 RX-total: 32 TX-packets: 32 TX-dropped: 0 TX-total: 32 ---------------------------------------------------------------------------- ---------------------- Forward statistics for port 3 ---------------------- RX-packets: 0 RX-dropped: 0 RX-total: 0 TX-packets: 64 TX-dropped: 0 TX-total: 64 ---------------------------------------------------------------------------- +++++++++++++++ Accumulated forward statistics for all ports+++++++++++++++ RX-packets: 32 RX-dropped: 0 RX-total: 32 TX-packets: 96 TX-dropped: 0 TX-total: 96 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Done. Stopping port 2... Stopping ports... Done Stopping port 3... Stopping ports... Done Shutting down port 2... Closing ports... Port 0 is closed Port 2 is closed Done Shutting down port 3... Closing ports... Port 1 is closed Port 3 is closed Done Bye... </pre><pre style="text-wrap: wrap;">If I try with 2 queues , the throughput only slightly improves. I expected to see larger values.</pre><pre style="text-wrap: wrap;">After enabling debug logs i observe that</pre><pre style="text-wrap: wrap;">1. Both the VMbus devices are being probed and matching VF devices found</pre><pre style="text-wrap: wrap;">2. VF devices are being configured with Rx and Tx queue setup.</pre><pre style="text-wrap: wrap;">Any ideas what I might be doing wrong?</pre><pre style="text-wrap: wrap;">Regards,</pre><pre style="text-wrap: wrap;">Nandini</pre></pre></div> This electronic communication and the information and any files transmitted with it, or attached to it, are confidential and are intended solely for the use of the individual or entity to whom it is addressed and may contain information that is confidential, legally privileged, protected by privacy laws, or otherwise restricted from disclosure to anyone else. If you are not the intended recipient or the person responsible for delivering the e-mail to the intended recipient, you are hereby notified that any use, copying, distributing, dissemination, forwarding, printing, or copying of this e-mail is strictly prohibited. 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