Re: [dpdk-dev] freeze with dpdk-2.0.0

[Olivier Deme <odeme@druidsoftware.com>]

Hi Changchun,

I confirm that blacklisting the first two network interfaces solve the 
problem.
Just to be clear, is it the case that it is not possible to have a DPDK 
application acquiring selectively virtio network devices without using 
the blacklisting (-b) option?

It seems a bit clumsy to have the application being configured with all 
network interfaces to be bound to DPDK.

Thanks,
Olivier.



On 15/04/15 04:45, Ouyang, Changchun wrote:
> Hi Oliver
>
>> -----Original Message-----
>> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Olivier Deme
>> Sent: Wednesday, April 15, 2015 1:16 AM
>> To: dev@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
>

-- 
	*Olivier Demé*
*Druid Software Ltd.*
*Tel: +353 1 202 1831*
*Email: odeme@druidsoftware.com <mailto:odeme@druidsoftware.com>*
*URL: http://www.druidsoftware.com*
Druid Software: Monetising enterprise small cells solutions.


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