Hi Matt,
I run two vpp instance (different prefix) in same hyper-v vm, the first vpp
instance prefix is vs, second is vc. I have eth1 and eth2, the config is below:
I start the vs and vc instance one by one, after vc instance started, the first
instance vs stuck in dpdk wait function. Does one hyper-v only support one
vpp instance ?
```
[root@localhost net-base]# ls /sys/class/net/eth1/device -all
lrwxrwxrwx 1 root root 0 Apr 29 21:14 /sys/class/net/eth1/device ->
../../../3362e322-f26f-4568-ba5c-d8ff6b734d0c
[root@localhost net-base]# ls /sys/class/net/eth2/device -all
lrwxrwxrwx 1 root root 0 Apr 29 21:14 /sys/class/net/eth2/device ->
../../../1c66c020-246f-4948-8d16-dd7e6c892f0d
[root@localhost net-base]# modprobe uio_hv_generic
[root@localhost net-base]# ifconfig eth1 down
[root@localhost net-base]# ifconfig eth2 down
[root@localhost net-base]# ifconfig eth1
eth1: flags=4098<BROADCAST,MULTICAST> mtu 1500
ether 00:15:5d:5c:68:0e txqueuelen 1000 (Ethernet)
RX packets 459960 bytes 47915079 (45.6 MiB)
RX errors 0 dropped 7730 overruns 0 frame 0
TX packets 7838 bytes 1283736 (1.2 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@localhost net-base]# ifconfig eth2
eth2: flags=4098<BROADCAST,MULTICAST> mtu 1500
ether 00:15:5d:5c:68:0f txqueuelen 1000 (Ethernet)
RX packets 31316 bytes 3085337 (2.9 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 7658 bytes 1270728 (1.2 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@localhost net-base]#
```
When i start the second vpp, the first vpp instance vs stuck in dpdk
`vmbus_txbr_write` function
Below is the first vpp insance vs stack :
```
vs$ sh hard
Name Idx Link Hardware
eth0 1 up eth0
Link speed: 1 Gbps
RX Queues:
queue thread mode
0 vs_wk_0 (1) polling
1 vs_wk_0 (1) polling
2 vs_wk_0 (1) polling
3 vs_wk_0 (1) polling
4 vs_wk_0 (1) polling
5 vs_wk_0 (1) polling
6 vs_wk_0 (1) polling
7 vs_wk_0 (1) polling
Ethernet address 00:15:5d:5c:68:0e
Microsoft Hyper-V Netvsc
carrier up full duplex max-frame-size 0
flags: pmd-init-fail
rx: queues 8 (max 64), desc 1024 (min 0 max 65535 align 1)
tx: queues 2 (max 64), desc 1024 (min 1 max 4096 align 1)
max rx packet len: 2048
promiscuous: unicast off all-multicast off
vlan offload: strip off filter off qinq off
rx offload avail: vlan-strip ipv4-cksum udp-cksum tcp-cksum rss-hash
rx offload active: none
tx offload avail: vlan-insert ipv4-cksum udp-cksum tcp-cksum tcp-tso
multi-segs
tx offload active: none
rss avail: ipv4-tcp ipv4-udp ipv4 ipv6-tcp ipv6
rss active: ipv4-tcp ipv4
tx burst function: (not available)
rx burst function: (not available)
Errors:
rte_eth_rx_queue_setup[port:0, errno:-12]: Unknown error -12
local0 0 down local0
Link speed: unknown
local
vs$
Program received signal SIGINT, Interrupt.
rte_atomic32_cmpset (dst=0x7ffa80000000, exp=29392, src=29480) at
../src-dpdk/lib/eal/x86/include/rte_atomic.h:189
189 {
Missing separate debuginfos, use: debuginfo-install libgcc-4.8.5-44.el7.x86_64
libstdc++-4.8.5-44.el7.x86_64 libuuid-2.23.2-65.el7_9.1.x86_64
mbedtls-2.7.17-1.el7.x86_64 pkcs11-helper-1.11-3.el7.x86_64
(gdb) bt
#0 rte_atomic32_cmpset (dst=0x7ffa80000000, exp=29392, src=29480) at
../src-dpdk/lib/eal/x86/include/rte_atomic.h:189
#1 0x00007fff687689c7 in vmbus_txbr_write (tbr=0x7fe63ffb11f0,
iov=0x7fff64421b90, iovlen=4, need_sig=0x7fff64421bdf) at
../src-dpdk/drivers/bus/vmbus/vmbus_bufring.c:162
#2 0x00007fff6876906e in rte_vmbus_chan_send_sglist (chan=0x7fe63ffb11c0,
sg=0x7fff64421c80, sglen=1, data=0x7fff64421c90, dlen=40, xactid=0,
need_sig=0x0) at ../src-dpdk/drivers/bus/vmbus/vmbus_channel.c:175
#3 0x00007fff6afe2e11 in hn_nvs_send_sglist (chan=0x7fe63ffb11c0,
sg=0x7fff64421c80, sglen=1, nvs_msg=0x7fff64421c90, nvs_msglen=40, sndc=0,
need_sig=0x0) at ../src-dpdk/drivers/net/netvsc/hn_nvs.h:236
#4 0x00007fff6afe2fff in hn_nvs_send_rndis_ctrl (chan=0x7fe63ffb11c0,
req=0x7fe640cd7000, reqlen=28) at ../src-dpdk/drivers/net/netvsc/hn_rndis.c:285
#5 0x00007fff6afe33bb in hn_rndis_exec1 (hv=0x7fe63ffb1380,
req=0x7fe640cd7000, reqlen=28, comp=0x7fe640cd6000, comp_len=28) at
../src-dpdk/drivers/net/netvsc/hn_rndis.c:396
#6 0x00007fff6afe3554 in hn_rndis_execute (hv=0x7fe63ffb1380, rid=191,
req=0x7fe640cd7000, reqlen=28, comp=0x7fe640cd6000, comp_len=28,
comp_type=2147483652) at ../src-dpdk/drivers/net/netvsc/hn_rndis.c:440
#7 0x00007fff6afe3733 in hn_rndis_query (hv=0x7fe63ffb1380, oid=65812,
idata=0x0, idlen=0, odata=0x7fe63ffb13a8, odlen=4) at
../src-dpdk/drivers/net/netvsc/hn_rndis.c:501
#8 0x00007fff6afe4c38 in hn_rndis_get_linkstatus (hv=0x7fe63ffb1380) at
../src-dpdk/drivers/net/netvsc/hn_rndis.c:1116
#9 0x00007fff6afdf697 in hn_dev_link_update (dev=0x7fff6cff9180
<rte_eth_devices>, wait_to_complete=0) at
../src-dpdk/drivers/net/netvsc/hn_ethdev.c:234
#10 0x00007fff6910615e in rte_eth_link_get_nowait (port_id=0,
eth_link=0x7fff77b8f9a8) at ../src-dpdk/lib/ethdev/rte_ethdev.c:2787
#11 0x00007fff6c565f80 in dpdk_update_link_state (xd=0x7fff77b8f900,
now=48.256990863990843) at
/root/code/net-base/.vpp-22.02/src/plugins/dpdk/device/init.c:1327
#12 0x00007fff6c566633 in dpdk_process (vm=0x7fff6fbff680, rt=0x7fff70aaac40,
f=0x0) at /root/code/net-base/.vpp-22.02/src/plugins/dpdk/device/init.c:1454
#13 0x00007ffff476e298 in vlib_process_bootstrap (_a=140734878931552) at
/root/code/net-base/.vpp-22.02/src/vlib/main.c:1235
#14 0x00007ffff3f43790 in clib_calljmp () at
/root/code/net-base/.vpp-22.02/src/vppinfra/longjmp.S:123
#15 0x00007fff64775a10 in ?? ()
#16 0x00007ffff476e54e in vlib_process_startup (vm=0x7fff6fbff680,
p=0x7fff70aaac40, f=0x7ffff476243f <vlib_process_start_switch_stack+360>) at
/root/code/net-base/.vpp-22.02/src/vlib/main.c:1260
#17 0x00007fff70aaac40 in ?? ()
#18 0x00007fff70619c88 in ?? ()
#19 0x00007fff70619b28 in ?? ()
#20 0x0000000000000013 in ?? ()
#21 0x00007fff70619c88 in ?? ()
#22 0x00007fff70aaac40 in ?? ()
#23 0x00007fff70aaa900 in ?? ()
#24 0x0000000000000000 in ?? ()
(gdb) info thread
Id Target Id Frame
3 Thread 0x7ffabf4a7700 (LWP 1659) "vs_wk_0" 0x00007ffff4762628 in
vlib_get_node (vm=0x7fff77b7a800, i=69) at
/root/code/net-base/.vpp-22.02/src/vlib/node_funcs.h:88
2 Thread 0x7ffac00b5700 (LWP 1658) "eal-intr-thread" 0x00007ffff38d20e3 in
epoll_wait () at ../sysdeps/unix/syscall-template.S:81
* 1 Thread 0x7ffff7eaf840 (LWP 1598) "vs_main" rte_atomic32_cmpset
(dst=0x7ffa80000000, exp=29392, src=29480) at
../src-dpdk/lib/eal/x86/include/rte_atomic.h:189
(gdb)
```
Below is the second vpp instance vc, which work well:
```
vc$ sh hard
Name Idx Link Hardware
eth0 1 up eth0
Link speed: 10 Gbps
RX Queues:
queue thread mode
0 vc_wk_0 (1) polling
1 vc_wk_0 (1) polling
2 vc_wk_0 (1) polling
3 vc_wk_0 (1) polling
4 vc_wk_0 (1) polling
5 vc_wk_0 (1) polling
6 vc_wk_0 (1) polling
7 vc_wk_0 (1) polling
Ethernet address 00:15:5d:5c:68:0f
Microsoft Hyper-V Netvsc
carrier up full duplex max-frame-size 0
flags: pmd-init-fail
rx: queues 8 (max 64), desc 1024 (min 0 max 65535 align 1)
tx: queues 2 (max 64), desc 1024 (min 1 max 4096 align 1)
max rx packet len: 2048
promiscuous: unicast off all-multicast off
vlan offload: strip off filter off qinq off
rx offload avail: vlan-strip ipv4-cksum udp-cksum tcp-cksum rss-hash
rx offload active: none
tx offload avail: vlan-insert ipv4-cksum udp-cksum tcp-cksum tcp-tso
multi-segs
tx offload active: none
rss avail: ipv4-tcp ipv4-udp ipv4 ipv6-tcp ipv6
rss active: ipv4-tcp ipv4
tx burst function: (not available)
rx burst function: (not available)
Errors:
rte_eth_rx_queue_setup[port:0, errno:-12]: Unknown error -12
local0 0 down local0
Link speed: unknown
local
vc$
```
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