Validation:
Platform description
--------------------
guest (dpdk)
+----------------+
| |
| |
| port0 |
+----------------+
|
| virtio
|
+----------------+
| tap0 |
| |
| |
+----------------+
host (linux, vhost-net)
Host configuration
------------------
Start qemu with:
- a ne2k management interface to avoi any conflict with dpdk
- a virtio net device, connected to a tap interface through vhost-net
/usr/bin/qemu-system-x86_64 -k fr -daemonize --enable-kvm -m 2G -cpu host \
-smp 3 -serial telnet::40564,server,nowait -serial null \
-qmp tcp::44340,server,nowait -monitor telnet::49229,server,nowait \
-device ne2k_pci,mac=de:ad:de:01:02:03,netdev=user.0,addr=03 \
-netdev user,id=user.0,hostfwd=tcp::34965-:22 \
-netdev type=tap,id=vhostnet0,script=no,vhost=on,queues=8 \
-device virtio-net-pci,netdev=vhostnet0,mq=on,vectors=17 \
-hda "${VM_PATH}/ubuntu-16.04-template.qcow2" \
-snapshot -vga none -display none
Guest configuration
-------------------
Compile dpdk:
cd dpdk.org
make config T=x86_64-native-linuxapp-gcc
sed -i
's,CONFIG_RTE_LIBRTE_VIRTIO_DEBUG_INIT=n,CONFIG_RTE_LIBRTE_VIRTIO_DEBUG_INIT=y,'
build/.config
sed -i
's,CONFIG_RTE_LIBRTE_VIRTIO_DEBUG_DRIVER=n,CONFIG_RTE_LIBRTE_VIRTIO_DEBUG_DRIVER=y,'
build/.config
make -j4
Prepare environment:
mkdir -p /mnt/huge
mount -t hugetlbfs nodev /mnt/huge
echo 256 >
/sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages
modprobe uio_pci_generic
python usertools/dpdk-devbind.py -b uio_pci_generic 0000:00:02.0
./build/app/testpmd -l 0,1 --log-level 8 -- --total-num-mbufs=16384 \
-i --port-topology=chained --disable-hw-vlan-filter \
--disable-hw-vlan-strip --enable-rx-cksum --enable-lro \
--txqflags=0
Before the reverts (patch 1 and 2 of the patchset)
------------------
testpmd cannot start
...
PMD: virtio_dev_configure(): virtio does not support IP checksum
After the reverts
-----------------
testpmd starts properly, and receives packets with csum flags
testpmd> set fwd rxonly
Set rxonly packet forwarding mode
testpmd> set verbose 1
Change verbose level from 0 to 1
testpmd> start
# tcp packet sent from the host
port 0/queue 0: received 1 packets
src=16:9A:CA:76:89:BC - dst=52:54:00:12:34:56 - type=0x0800 - length=74 -
nb_segs=1 - hw ptype: L2_ETHER L3_IPV4 L4_TCP - sw ptype: L2_ETHER L3_IPV4
L4_TCP - l2_len=14 - l3_len=20 - l4_len=40 - Receive queue=0x0
ol_flags: PKT_RX_L4_CKSUM_NONE PKT_RX_IP_CKSUM_UNKNOWN
