https://bugs.dpdk.org/show_bug.cgi?id=1747 Bug ID: 1747 Summary: [dpdk-25.07] virtio_pvp_regression: perf drop Product: DPDK Version: unspecified Hardware: All OS: All Status: UNCONFIRMED Severity: normal Priority: Normal Component: vhost/virtio Assignee: dev@dpdk.org Reporter: yux.jiang@intel.com Target Milestone: --- [Environment] DPDK version: commit 20460dcffd08a4680f881c39916ae783ee830374 (HEAD -> main, tag: v25.07-rc2, origin/main, origin/HEAD) Author: Thomas Monjalon Date: Mon Jun 30 00:23:49 2025 +0200 version: 25.07-rc2 Signed-off-by: Thomas Monjalon OS: Ubuntu 24.04.2 LTS (Noble Numbat); 6.8.0-62-generic Compiler: gcc version 13.3.0 (Ubuntu 13.3.0-6ubuntu2~24.04) Hardware platform: Intel(R) Xeon(R) Platinum 8380 CPU @ 2.30GHz CPU @ 2.3GHz QEMU: qemu-10.0.2 NIC: Ethernet Controller E810-C for QSFP 1592 [Bad commit Debug Info]: 3e3c7f3fa5 net/virtio: fix check of threshold for Tx freeing [Test Setup] Steps to reproduce List the steps to reproduce the issue. 1, Build dpdk rm -rf x86_64-native-linuxapp-gcc CC=gcc meson -Denable_kmods=True -Dlibdir=lib --default-library=static x86_64-native-linuxapp-gcc ninja -C x86_64-native-linuxapp-gcc 2, Bind one NIC port and launch vhost-user usertools/dpdk-devbind.py --force --bind=vfio-pci 0000:4b:00.0 x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 5-7 -n 8 -a 0000:4b:00.0 --file-prefix=vhost_343434_20250703181552 --vdev 'eth_vhost0,iface=/root/dpdk/vhost-net,queues=2,client=1' -- -i --nb-cores=2 --rxq=2 --txq=2 --txd=1024 --rxd=1024 set fwd mac start 3, Launch qemu and start testpmd lsof -n -i:6000 taskset -c 20,21,22,23,24,25,26,27 /home/QEMU/qemu-10.0.2/bin/qemu-system-x86_64 -name vm0 -enable-kvm -pidfile /tmp/.vm0.pid -daemonize -monitor unix:/tmp/vm0_monitor.sock,server,nowait -netdev user,id=nttsip1,hostfwd=tcp:10.239.252.245:6000-:22 -device e1000,netdev=nttsip1 -chardev socket,id=char0,path=/root/dpdk/vhost-net,server -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce,queues=2 -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:01,disable-modern=true,mrg_rxbuf=off,rx_queue_size=1024,tx_queue_size=1024,mq=on,vectors=15 -cpu host -smp 8 -m 8192 -object memory-backend-file,id=mem,size=8192M,mem-path=/dev/hugepages,share=on -numa node,memdev=mem -mem-prealloc -chardev socket,path=/tmp/vm0_qga0.sock,server,nowait,id=vm0_qga0 -device virtio-serial -device virtserialport,chardev=vm0_qga0,name=org.qemu.guest_agent.0 -vnc :4 -drive file=/home/image/ubuntu2004.img IN VM: echo 0 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages echo 1024 > /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages modprobe vfio modprobe vfio-pci echo 1 > /sys/module/vfio/parameters/enable_unsafe_noiommu_mode usertools/dpdk-devbind.py --force --bind=vfio-pci --noiommu-mode 0000:00:04.0 x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0x7 -n 4 -- -i --enable-hw-vlan-strip --nb-cores=2 --rxq=2 --txq=2 --txd=1024 --rxd=1024 set fwd mac start 4, Use trex to send pkgs Ether(dst="40:a6:b7:96:e4:00")/IP(src="192.168.4.1")/("X"*26) 5, on Vhost side check NIC statistics: testpmd> show port stats all [Actual Result] testpmd> show port stats all ######################## NIC statistics for port 0 ######################## RX-packets: 1335228256 RX-missed: 3852467168 RX-bytes: 1257101091618 RX-errors: 0 RX-nombuf: 0 TX-packets: 1335227072 TX-errors: 0 TX-bytes: 922022159232 Throughput (since last show) Rx-pps: 2082875 Rx-bps: 8546636528 Tx-pps: 2082875 Tx-bps: 10284137360 ############################################################################ ######################## NIC statistics for port 1 ######################## RX-packets: 1335227200 RX-missed: 0 RX-bytes: 2021533980800 RX-errors: 0 RX-nombuf: 0 TX-packets: 1335227392 TX-errors: 0 TX-bytes: 2021534271488 Throughput (since last show) Rx-pps: 2082875 Rx-bps: 25227789696 Tx-pps: 2082875 Tx-bps: 25227789696 ############################################################################ testpmd> [Expect Result] testpmd> show port stats all ######################## NIC statistics for port 0 ######################## RX-packets: 161121824 RX-missed: 290949041 RX-bytes: 684435274430 RX-errors: 0 RX-nombuf: 0 TX-packets: 161069126 TX-errors: 0 TX-bytes: 243858650692 Throughput (since last show) Rx-pps: 2880720 Rx-bps: 98209559280 Tx-pps: 2880658 Tx-bps: 34890425968 ############################################################################ ######################## NIC statistics for port 1 ######################## RX-packets: 161069346 RX-missed: 0 RX-bytes: 243858989844 RX-errors: 0 RX-nombuf: 0 TX-packets: 161070988 TX-errors: 50004 TX-bytes: 243861475832 Throughput (since last show) Rx-pps: 2880737 Rx-bps: 34891493424 Tx-pps: 2880737 Tx-bps: 34891493424 ######## -- You are receiving this mail because: You are the assignee for the bug.