[dpdk-users] DPDK procedure start Error: "PMD: Could not add multiq qdisc (17): File exists"

[hfli at netitest.com]

Hi Admin,

 

Our DPDK procedure want to deploy on Hyper-v and Azure Cloud, so we try it
on Hyper-v firstly. It need start 2 processes, a client process use port1, a
server process use port2, port1 and port2 in one internal subnet on a
virtual switch, 

 

But only one process can be started successfully, the other said error,
"PMD: Could not add multiq qdisc (17): File exists", our procedure is
running well on Vmware/KVM/ASW, is there any help for this?

 

Below is our env:

 

OS: Windows 10 and Hyper-V on it

Guest OS: CentOS7.6(Upgrade kernel to 4.20.0)

DPDK version: 18.02.2

 

# uname -a

Linux localhost.localdomain 4.20.0-1.el7.elrepo.x86_64 #1 SMP Sun Dec 23
20:11:51 EST 2018 x86_64 x86_64 x86_64 GNU/Linux

 

root:/# ifconfig -a

bond0: flags=5122<BROADCAST,MASTER,MULTICAST>  mtu 1500

        ether 46:28:ec:c8:7a:74  txqueuelen 1000  (Ethernet)

        RX packets 0  bytes 0 (0.0 B)

        RX errors 0  dropped 0  overruns 0  frame 0

        TX packets 0  bytes 0 (0.0 B)

        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

 

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536

        inet 127.0.0.1  netmask 255.0.0.0

        inet6 ::1  prefixlen 128  scopeid 0x10<host>

        loop  txqueuelen 1000  (Local Loopback)

        RX packets 75  bytes 6284 (6.1 KiB)

        RX errors 0  dropped 0  overruns 0  frame 0

        TX packets 75  bytes 6284 (6.1 KiB)

        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

 

mgmt1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500

        inet 192.168.16.130  netmask 255.255.255.0  broadcast 192.168.16.255

        inet6 fe80::78e3:1af8:3333:ff45  prefixlen 64  scopeid 0x20<link>

        ether 00:15:5d:10:85:14  txqueuelen 1000  (Ethernet)

        RX packets 5494  bytes 706042 (689.4 KiB)

        RX errors 0  dropped 0  overruns 0  frame 0

        TX packets 2163  bytes 438205 (427.9 KiB)

        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

 

mgmt2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500

        ether 00:15:5d:10:85:15  txqueuelen 1000  (Ethernet)

        RX packets 3131  bytes 518243 (506.0 KiB)

        RX errors 0  dropped 0  overruns 0  frame 0

        TX packets 0  bytes 0 (0.0 B)

        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

 

port1: flags=4675<UP,BROADCAST,RUNNING,ALLMULTI,MULTICAST>  mtu 1500

        ether 00:15:5d:10:85:16  txqueuelen 1000  (Ethernet)

        RX packets 1707  bytes 163778 (159.9 KiB)

        RX errors 0  dropped 0  overruns 0  frame 0

        TX packets 693  bytes 70666 (69.0 KiB)

        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

 

port2: flags=4675<UP,BROADCAST,RUNNING,ALLMULTI,MULTICAST>  mtu 1500

        ether 00:15:5d:10:85:17  txqueuelen 1000  (Ethernet)

        RX packets 900  bytes 112256 (109.6 KiB)

        RX errors 0  dropped 0  overruns 0  frame 0

        TX packets 1504  bytes 122428 (119.5 KiB)

        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

 

root:/# ethtool -i port1

driver: hv_netvsc

version: 

firmware-version: N/A

expansion-rom-version: 

bus-info: 

supports-statistics: yes

supports-test: no

supports-eeprom-access: no

supports-register-dump: no

supports-priv-flags: no

root:/# ethtool -i port2

driver: hv_netvsc

version: 

firmware-version: N/A

expansion-rom-version: 

bus-info: 

supports-statistics: yes

supports-test: no

supports-eeprom-access: no

supports-register-dump: no

supports-priv-flags: no

root:/#

 

Start server process successfully

# ./Tester -l 3 -n 4 --vdev="net_vdev_netvsc1,iface=port2" --socket-mem 1500
--file-prefix server

EAL: Detected 4 lcore(s)

EAL: No free hugepages reported in hugepages-1048576kB

EAL: Multi-process socket /var/log/.server_unix

EAL: Probing VFIO support...

EAL: WARNING: cpu flags constant_tsc=yes nonstop_tsc=no -> using unreliable
clock cycles !

PMD: net_failsafe: Initializing Fail-safe PMD for
net_failsafe_net_vdev_netvsc1_id0

PMD: net_failsafe: Creating fail-safe device on NUMA socket 0

PMD: Initializing pmd_tap for net_tap_net_vdev_netvsc1_id0 as dtap0

PMD: net_failsafe: MAC address is 00:15:5d:10:85:17

 

Concorrently start client process failed

# ./Tester -l 2 -n 4 --vdev="net_vdev_netvsc0,iface=port1" --socket-mem 1500
--file-prefix client

EAL: Detected 4 lcore(s)

EAL: No free hugepages reported in hugepages-1048576kB

EAL: Multi-process socket /var/log/.client_unix

EAL: Probing VFIO support...

EAL: WARNING: cpu flags constant_tsc=yes nonstop_tsc=no -> using unreliable
clock cycles !

PMD: net_failsafe: Initializing Fail-safe PMD for
net_failsafe_net_vdev_netvsc0_id0

PMD: net_failsafe: Creating fail-safe device on NUMA socket 0

PMD: Initializing pmd_tap for net_tap_net_vdev_netvsc0_id0 as dtap0

PMD: Could not add multiq qdisc (17): File exists

PMD: dtap0: failed to create multiq qdisc.

PMD:  Disabling rte flow support: File exists(17)

PMD: Remote feature requires flow support.

PMD: TAP Unable to initialize net_tap_net_vdev_netvsc0_id0

EAL: Driver cannot attach the device (net_tap_net_vdev_netvsc0_id0)

PMD: net_failsafe: sub_device 1 probe failed (No such file or directory)

PMD: net_failsafe: MAC address is 06:5f:a6:0a:b4:f9

vdev_probe(): failed to initialize : PMD: net_failsafe: MAC address is
06:5f:a6:0a:b4:f9

device

EAL: Bus (vdev) probe failed.

 

 

 

Thanks and Regards,

Jack