[Qemu-devel] [Bug 808588] Re: Netperf tests cause i82551 network down

[Amos Kong]

1. When bug reproduces, we can only capture arp request in the tap
device.

# tcpdump -i tap0
tcpdump: WARNING: tap0: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on tap0, link-type EN10MB (Ethernet), capture size 65535 bytes
16:14:11.741203 ARP, Request who-has 10.66.8.167 tell 10.66.8.252, length 28
16:14:12.741186 ARP, Request who-has 10.66.8.167 tell 10.66.8.252, length 28
16:14:13.741183 ARP, Request who-has 10.66.8.167 tell 10.66.8.252, length 28

2. Execute 'system_reset' in qemu monitor,  guest could not get ip
address.

# tcpdump -i tap0
tcpdump: WARNING: tap0: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on tap0, link-type EN10MB (Ethernet), capture size 65535 bytes
16:16:21.508588 IP6 :: > ff02::16: HBH ICMP6, multicast listener report v2, 1 
group record(s), length 28
16:16:21.682585 IP6 :: > ff02::1:ff12:3456: ICMP6, neighbor solicitation, who 
has fe80::5054:ff:fe12:3456, length 24
16:16:22.682616 IP6 fe80::5054:ff:fe12:3456 > ff02::2: ICMP6, router 
solicitation, length 16
16:16:23.105303 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request 
from 52:54:00:12:34:56 (oui Unknown), length 300
16:16:25.837597 IP6 fe80::5054:ff:fe12:3456 > ff02::16: HBH ICMP6, multicast 
listener report v2, 1 group record(s), length 28
16:16:26.682594 IP6 fe80::5054:ff:fe12:3456 > ff02::2: ICMP6, router 
solicitation, length 16
16:16:30.111097 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request 
from 52:54:00:12:34:56 (oui Unknown), length 300
16:16:30.682598 IP6 fe80::5054:ff:fe12:3456 > ff02::2: ICMP6, router 
solicitation, length 16
16:16:39.112289 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request 
from 52:54:00:12:34:56 (oui Unknown), length 300
16:16:43.107232 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request 
from 52:54:00:12:34:56 (oui Unknown), length 300

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/808588

Title:
  Netperf tests cause i82551 network down

Status in QEMU:
  New

Bug description:
  1. boot up a guest with 82551 nic
  # qemu-kvm -net nic,model=i82551 ...
  2. launch netperf server in the guest
  3.on the host 
  for b in 32 64 128 256 512 1024 1460 2048 4096 8192  9000 16384 32768  65495 
65507
  do ./netperf -t TCP_STREAM -f m -H <guest ip> -P 0 -l 10 -- -m $b
  done

  for b in 32 64 128 256 512 1024 1460 2048 4096 8192  9000 16384 32768  65495 
65507
  do ./netperf -t UDP_STREAM -f m -H <guest ip> -P 0 -l 10 -- -m $b
  done

  
  Result:
  Guest network becomes down

  
  netperf client output:
  ./netperf -t TCP_STREAM -f m -H 10.66.9.39 -P 0 -l 10 -- -m 32
   87380  16384     32    10.97      19.61
  ./netperf -t TCP_STREAM -f m -H 10.66.9.39 -P 0 -l 10 -- -m 64
   87380  16384     64    11.55      79.68
  ./netperf -t TCP_STREAM -f m -H 10.66.9.39 -P 0 -l 10 -- -m 128
   87380  16384    128    10.16      14.20
  ./netperf -t TCP_STREAM -f m -H 10.66.9.39 -P 0 -l 10 -- -m 256
   87380  16384    256    11.17      12.85
  ./netperf -t TCP_STREAM -f m -H 10.66.9.39 -P 0 -l 10 -- -m 512
   87380  16384    512    10.01      16.38
  ./netperf -t TCP_STREAM -f m -H 10.66.9.39 -P 0 -l 10 -- -m 1024
  Interrupted system call
  netperf: remote error 4./netperf -t TCP_STREAM -f m -H 10.66.9.39 -P 0 -l 10 
-- -m 1460
  establish control: are you sure there is a netserver listening on 10.66.9.39 
at port 12865?
  establish_control could not establish the control connection from 0.0.0.0 
port 0 address family AF_UNSPEC to 10.66.9.39 port 12865 address family 
AF_UNSPEC
  ./netperf -t TCP_STREAM -f m -H 10.66.9.39 -P 0 -l 10 -- -m 2048

  
  qemu debug message:
  ....
  EE100   nic_receive             command 0x0000, link 0x3d3e6822, addr 
0xffffffff, size 1518
  EE100   nic_can_receive         0x29a0180
  EE100   nic_receive             0x29a0180 received broadcast, len=60
  EE100   nic_receive             Receive buffer (0 bytes) too small for data 
(60 bytes); data truncated
  EE100   nic_receive             command 0x8000, link 0x37b32022, addr 
0xffffffff, size 0
                                                   
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  EE100   nic_receive             receive: Running out of frames
                                                   ^^^^^^^^^^^^^^^^^^^^^^^^
  EE100   eepro100_write1         addr=Command/Status+1 val=0x20

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/808588/+subscriptions