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.
ifconfig -a show that no packet come across eth0, eth1 which I used with
ping, but everything come across local loopback
eth0 Link encap:Ethernet HWaddr 52:54:00:12:34:56
inet addr:192.168.0.200 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::5054:ff:fe12:3456/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
eth1 Link encap:Ethernet HWaddr 52:54:00:12:34:57
inet addr:192.168.1.202 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::5054:ff:fe12:3457/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:53 errors:0 dropped:0 overruns:0 frame:0
TX packets:53 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:5936 (5.7 KiB) TX bytes:5936 (5.7 KiB)
Do You have any idea what can be wrong with configuration between VM2VM?
Any help would be appreciated.
