> -----Original Message----- > From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Maciej Grochowski > Sent: Friday, May 15, 2015 6:15 PM > To: dev at dpdk.org > Subject: [dpdk-dev] Vhost user no connection vm2vm > > Hello, I have strange issue with example/vhost app. > > I had compiled DPDK to run a vhost example app with followed flags > > CONFIG_RTE_LIBRTE_VHOST=y > CONFIG_RTE_LIBRTE_VHOST_USER=y > CONFIG_RTE_LIBRTE_VHOST_DEBUG=n > > then I run vhost app based on documentation: > > ./build/app/vhost-switch -c f -n 4 --huge-dir /mnt/huge --socket-mem 3712 > -- -p 0x1 --dev-basename usvhost --vm2vm 1 --stats 9 > > -I use this strange --socket-mem 3712 because of physical limit of memoryon > device -with this vhost user I run two KVM machines with followed > parameters > > kvm -nographic -boot c -machine pc-i440fx-1.4,accel=kvm -name vm1 -cpu > host -smp 2 -hda /home/ubuntu/qemu/debian_squeeze2_amd64.qcow2 -m > 1024 -mem-path /mnt/huge -mem-prealloc -chardev > socket,id=char1,path=/home/ubuntu/dpdk/examples/vhost/usvhost > -netdev type=vhost-user,id=hostnet1,chardev=char1 > -device virtio-net > pci,netdev=hostnet1,id=net1,csum=off,gso=off,guest_tso4=off,guest_tso6= > off,guest_ecn=off > -chardev > socket,id=char2,path=/home/ubuntu/dpdk/examples/vhost/usvhost > -netdev type=vhost-user,id=hostnet2,chardev=char2 > -device > virtio-net- > pci,netdev=hostnet2,id=net2,csum=off,gso=off,guest_tso4=off,guest_tso6= > off,guest_ecn=off > > After running KVM virtio correctly starting (below logs from vhost app) ... > VHOST_CONFIG: mapped region 0 fd:31 to 0x2aaabae00000 sz:0xa0000 > off:0x0 > VHOST_CONFIG: mapped region 1 fd:37 to 0x2aaabb000000 sz:0x10000000 > off:0xc0000 > VHOST_CONFIG: read message VHOST_USER_SET_VRING_NUM > VHOST_CONFIG: read message VHOST_USER_SET_VRING_BASE > VHOST_CONFIG: read message VHOST_USER_SET_VRING_ADDR > VHOST_CONFIG: read message VHOST_USER_SET_VRING_KICK > VHOST_CONFIG: vring kick idx:0 file:38 > VHOST_CONFIG: virtio isn't ready for processing. > VHOST_CONFIG: read message VHOST_USER_SET_VRING_NUM > VHOST_CONFIG: read message VHOST_USER_SET_VRING_BASE > VHOST_CONFIG: read message VHOST_USER_SET_VRING_ADDR > VHOST_CONFIG: read message VHOST_USER_SET_VRING_KICK > VHOST_CONFIG: vring kick idx:1 file:39 > VHOST_CONFIG: virtio is now ready for processing. > VHOST_DATA: (1) Device has been added to data core 2 > > So everything looking good. > > Maybe it is something trivial but using options: --vm2vm 1 (or) 2 --stats 9 it > seems that I didn't have connection between VM2VM communication. I set > manually IP for eth0 and eth1: > > on 1 VM > ifconfig eth0 192.168.0.100 netmask 255.255.255.0 up ifconfig eth1 > 192.168.1.101 netmask 255.255.255.0 up > > on 2 VM > ifconfig eth0 192.168.1.200 netmask 255.255.255.0 up ifconfig eth1 > 192.168.0.202 netmask 255.255.255.0 up > > I notice that in vhostapp are one directional rx/tx queue so I tryied to ping > between VM1 to VM2 using both interfaces ping -I eth0 192.168.1.200 ping -I > eth1 192.168.1.200 ping -I eth0 192.168.0.202 ping -I eth1 192.168.0.202 > > on VM2 using tcpdump on both interfaces I didn't see any ICMP requests or > traffic > > And I cant ping between any IP/interfaces, moreover stats show me that: > > Device statistics ==================================== > Statistics for device 0 ------------------------------ > TX total: 0 > TX dropped: 0 > TX successful: 0 > RX total: 0 > RX dropped: 0 > RX successful: 0 > Statistics for device 1 ------------------------------ > TX total: 0 > TX dropped: 0 > TX successful: 0 > RX total: 0 > RX dropped: 0 > RX successful: 0 > Statistics for device 2 ------------------------------ > TX total: 0 > TX dropped: 0 > TX successful: 0 > RX total: 0 > RX dropped: 0 > RX successful: 0 > Statistics for device 3 ------------------------------ > TX total: 0 > TX dropped: 0 > TX successful: 0 > RX total: 0 > RX dropped: 0 > RX successful: 0 > ====================================================== > > So it seems like any packet didn't leave my VM. > also arp table is empty on each VM. > I think you can try with this command line to config your ports, and make sure the arp table is NOT empty:
ip addr add 192.168.1.2/24 dev eth0 ip neigh add 192.168.1.1 lladdr 00:01:04:00:01:00 dev eth0 ip link set dev eth0 up of course you need modify the ip, mac, and port according to your own platform. Thanks Changchun
