1.7.1 testpmd hangs system

1.7.1 testpmd hangs system

[David S. Roth]

All,

When I execute testpmd as shown below, it runs to the prompt apparently 
without error but the system becomes unresponsive and I am forced to reboot.

Any suggestions as to why this is happening?

Thanks in advance,
David

oot@dpdk-26:~/src/C/dpdk-1.7.1/x86_64-native-linuxapp-gcc# app/testpmd 
-c f -n 4 -- --portmask=0x1 --nb-cores=2 -i
EAL: Detected lcore 0 as core 0 on socket 0
EAL: Detected lcore 1 as core 1 on socket 0
[...]
EAL: Detected lcore 29 as core 5 on socket 1
EAL: Detected lcore 30 as core 6 on socket 1
EAL: Detected lcore 31 as core 7 on socket 1
EAL: Support maximum 64 logical core(s) by configuration.
EAL: Detected 32 lcore(s)
EAL: Setting up memory...
EAL: Ask a virtual area of 0x100000000 bytes
EAL: Virtual area found at 0x7f6b80000000 (size = 0x100000000)
EAL: Ask a virtual area of 0x100000000 bytes
EAL: Virtual area found at 0x7f6a40000000 (size = 0x100000000)
EAL: Requesting 4 pages of size 1024MB from socket 0
EAL: Requesting 4 pages of size 1024MB from socket 1
EAL: TSC frequency is ~2600000 KHz
EAL: Master core 0 is ready (tid=23fac840)
EAL: Core 3 is ready (tid=210bf700)
EAL: Core 2 is ready (tid=218c0700)
EAL: Core 1 is ready (tid=220c1700)
EAL: PCI device 0000:05:00.0 on NUMA socket 0
EAL:   probe driver: 8086:10f8 rte_ixgbe_pmd
EAL:   0000:05:00.0 not managed by VFIO driver, skipping
EAL:   PCI memory mapped at 0x7f6d23e6b000
EAL:   PCI memory mapped at 0x7f6d23e67000
EAL: PCI device 0000:05:00.1 on NUMA socket 0
EAL:   probe driver: 8086:10f8 rte_ixgbe_pmd
EAL:   0000:05:00.1 not managed by VFIO driver, skipping
EAL:   PCI memory mapped at 0x7f6d207bf000
EAL:   PCI memory mapped at 0x7f6d23e63000
previous number of forwarding ports 2 - changed to number of configured 
ports 1
Interactive-mode selected
Configuring Port 0 (socket 0)
Port 0: 38:EA:A7:8B:34:50
Configuring Port 1 (socket 0)
Port 1: 38:EA:A7:8B:34:51
Checking link statuses...
Port 0 Link Up - speed 10000 Mbps - full-duplex
Port 1 Link Up - speed 10000 Mbps - full-duplex
Done
testpmd>