168. VF Jumboframe Tests¶
The support of jumbo frames by Poll Mode Drivers consists in enabling a port to receive Jumbo Frames with a configurable maximum packet length that is greater than the standard maximum Ethernet frame length (1518 bytes), up to a maximum value imposed by the hardware.
Create VF device from PF devices.:
./dpdk_nic_bind.py --st 0000:87:00.0 'Ethernet Controller X710 for 10GbE SFP+' if=ens259f0 drv=i40e unused= 0000:87:00.1 'Ethernet Controller X710 for 10GbE SFP+' if=ens259f1 drv=i40e unused= echo 1 > /sys/bus/pci/devices/0000\:87\:00.0/sriov_numvfs echo 1 > /sys/bus/pci/devices/0000\:87\:00.1/sriov_numvfs ./dpdk_nic_bind.py --st 0000:87:00.0 'Ethernet Controller X710 for 10GbE SFP+' if=ens259f0 drv=i40e unused= 0000:87:02.0 'XL710/X710 Virtual Function' unused= 0000:87:0a.0 'XL710/X710 Virtual Function' unused=
Detach VFs from the host, bind them to pci-stub driver:
/sbin/modprobe pci-stub using `lspci -nn|grep -i ethernet` got VF device id, for example "8086 154c", echo "8086 154c" > /sys/bus/pci/drivers/pci-stub/new_id echo 0000:87:02.0 > /sys/bus/pci/devices/0000:87:02.0/driver/unbind echo 0000:87:02.0 > /sys/bus/pci/drivers/pci-stub/bind echo "8086 154c" > /sys/bus/pci/drivers/pci-stub/new_id echo 0000:87:0a.0 > /sys/bus/pci/devices/0000:87:0a.0/driver/unbind echo 0000:87:0a.0 > /sys/bus/pci/drivers/pci-stub/bind
Passthrough VFs 87:02.0 & 87:02.1 to vm0 and start vm0:
/usr/bin/qemu-system-x86_64 -name vm0 -enable-kvm \ -cpu host -smp 4 -m 2048 -drive file=/home/image/sriov-fc20-1.img -vnc :1 \ -device pci-assign,host=87:02.0,id=pt_0 \ -device pci-assign,host=87:0a.0,id=pt_1
Login vm0 and them bind VF devices to igb_uio driver:
./tools/dpdk_nic_bind.py --bind=igb_uio 00:04.0 00:05.0
Start testpmd, set it in mac forward mode:
testpmd -c 0x0f-- -i --portmask=0x1 \ --tx-offloads=0x8fff --max-pkt-len=9000--port-topology=loop testpmd> set fwd mac testpmd> start
Start packet forwarding in the
testpmd application with the
command. Then, make the Traffic Generator transmit to the target’s port
packets of lengths (CRC included) 1517, 1518, 8999, and 9000 respectively.
Check that the same amount of frames and bytes are received back by the
Traffic Generator from its port connected to the target’s port.
Note: 8259x family VF device jumbo frame setting only take effect when
VF rx mode jumbo frame is enable. VF device jumbo frame size setting shared
with PF device and testpmd parameter
max-pkt-len has no effect.
168.2. Functional Tests of Jumbo Frames¶
Testing the support of Jumbo Frames in Poll Mode Drivers consists in configuring the maximum packet length with a value greater than 1518, and in sending to the test machine packets with the following lengths (CRC included):
when driver is ixgbe, turn on the jumbo_frame switch:
sed -i -e 's/.jumbo_frame = .*$/.jumbo_frame = 1,/g' app/test-pmd/testpmd.c
- packet length = 1518 - 1
- packet length = 1518
- packet length = 1518 + 1
- packet length = maximum packet length - 1
- packet length = maximum packet length
- packet length = maximum packet length + 1
168.3. Test Case: Normal frames with no jumbo frame support¶
Check that packets of standard lengths are still received with setting max-pkt-len.
168.4. Test Case: Normal frames with jumbo frame support¶
Check that packets of standard lengths are still received when enabling the receipt of Jumbo Frames.
168.5. Test Case: Jumbo frames with no jumbo frame support¶
Check that with jumbo frame support, packet lengths greater than the standard maximum frame (1518) can not received.
168.6. Test Case: Jumbo frames with jumbo frame support¶
Check that Jumbo Frames of lengths greater than the standard maximum frame (1518) and lower or equal to the maximum frame length can be received.
168.7. Test Case: Jumbo frames over jumbo frame support¶
Check that packets larger than the configured maximum packet length are effectively dropped by the hardware.