[dpdk-dev] freeze with dpdk-2.0.0

[Ouyang, Changchun]

Hi Oliver

> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Olivier Deme
> Sent: Wednesday, April 15, 2015 1:16 AM
> To: dev at dpdk.org
> Subject: [dpdk-dev] freeze with dpdk-2.0.0
> 
> Hi,
> 
> I am trying to use DPDK-2.0.0 on Fedora 20 running in a qemu virtual machine.
> After loading the uio and igb_uio module and setting up hugepages, I try to
> run the helloworld demo application.
> As soon as the helloworld displays the "hello from core 1, hello from core 0"
> messages, I loose all network connectivity to the VM.
> 
> If I try to run the helloworld application remotely the output freezes after
> the following:
> # ./build/helloworld -c 3 -n 2
> EAL: Detected lcore 0 as core 0 on socket 0
> EAL: Detected lcore 1 as core 0 on socket 0
> EAL: Detected lcore 2 as core 0 on socket 0
> EAL: Detected lcore 3 as core 0 on socket 0
> EAL: Support maximum 128 logical core(s) by configuration.
> EAL: Detected 4 lcore(s)
> EAL: VFIO modules not all loaded, skip VFIO support...
> EAL: Setting up memory...
> EAL: Ask a virtual area of 0x7000000 bytes
> EAL: Virtual area found at 0x7f273be00000 (size = 0x7000000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7f273ba00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7f273b600000 (size = 0x200000)
> EAL: Ask a virtual area of 0xc00000 bytes
> EAL: Virtual area found at 0x7f273a800000 (size = 0xc00000)
> EAL: Requesting 64 pages of size 2MB from socket 0
> EAL: TSC frequency is ~1995193 KHz
> EAL: WARNING: cpu flags constant_tsc=yes nonstop_tsc=no -> using
> unreliable clock cycles !
> EAL: Master lcore 0 is ready (tid=449e9900;cpuset=[0])
> PMD: ENICPMD trace: rte_enic_pmd_init
> EAL: lcore 1 is ready (tid=3a7ff700;cpuset=[1])
> 
> 
> If I try to restart the network services, I get the error from syslog:
> BUG: soft lockup - CPU#2 stuck for 22s!
> 
> 
> The network devices exposed to the VM are 2 BCM5719 interfaces + 2
> 82599ES interfaces:
> 02:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5719
> Gigabit Ethernet PCIe (rev 01)
> 02:00.1 Ethernet controller: Broadcom Corporation NetXtreme BCM5719
> Gigabit Ethernet PCIe (rev 01)
> 0d:00.0 Ethernet controller: Intel Corporation 82599ES 10-Gigabit SFI/SFP+
> Network Connection (rev 01)
> 0d:00.1 Ethernet controller: Intel Corporation 82599ES 10-Gigabit SFI/SFP+
> Network Connection (rev 01)
> 
> 
> Within the VM, lspci shows:
> 00:03.0 Ethernet controller: Red Hat, Inc Virtio network device
> 00:04.0 Ethernet controller: Red Hat, Inc Virtio network device
> 00:05.0 Ethernet controller: Red Hat, Inc Virtio network device
> 00:06.0 Ethernet controller: Red Hat, Inc Virtio network device
> 
> 
> After loading the kernel modules, I bind the interfaces to DPDK with:
> /root/dpdk-2.0.0/tools/dpdk_nic_bind.py --bind=igb_uio 00:05.0
> /root/dpdk-2.0.0/tools/dpdk_nic_bind.py --bind=igb_uio 00:06.0
> 
> Would you know what is causing this?
> 

Maybe you can try with "--b 00:03.0 00:04.0" to force dpdk not to grab these 2 virtio devices
To see if this issue is resolved.

For virtio dev, dpdk doesn't depend on uio/igb_uio any more after the single virtio, 
It will also grab the virtio device to use it even without uio module except for you specify it into black-list.  

Thanks
Changchun