[dpdk-users] error running l3fwd on kvm

[Arseniy Zaostrovnykh]

It seems like there should be enough memory. However you use 2 lcores, 
and this may imply, that you will be using 2 TX queues, look at the line 
2796 in examples/l3fwd/main.c :
         n_tx_queue = nb_lcores;

I had that problem, I fixed it by using just a single lcore, e.g.:

-c 0x1 .... --config="(0,0,0),(1,0,0)"


On 12.11.2015 18:12, Mario Carrillo wrote:
> This is the configuration that I'm using for running the l3fwd example
> ./build/l3fwd -c 0x3 -n 1 -d librte_pmd_virtio.so -- -p 0x3 
> --config="(0,0,0),(1,0,1)"
>
> and about environment
>  Hugepagesize:       2048 kB
>
> echo 1024 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages
>
> echo 1024 > 
> /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages
>
> what do you think?
>
> Thanks.
> Mario.
>
>
> On 11/12/2015 10:48 AM, Arseniy Zaostrovnykh wrote:
>> Another possible cause just come to my mind:
>> some drivers do not support more than 1 queues in each direction. You 
>> have 2 transmission queues (nb_txq=2) here.
>>
>> On 12.11.2015 17:46, Arseniy Zaostrovnykh wrote:
>>> You may lack memory. Make sure you are allocating enough hugepages 
>>> (at least 1Gb)
>>>
>>> On 12.11.2015 17:13, Arevalo, Mario Alfredo C wrote:
>>>> From: Arevalo, Mario Alfredo C
>>>> Sent: Thursday, November 12, 2015 7:54 AM
>>>> To: users at dpdk.org
>>>> Subject: error running l3fwd on kvm
>>>>
>>>>      Hello guys, I'm trying to run l3fwd, it works very well when I 
>>>> run it in bare-metal, however
>>>> when I try to run in a Virtual Machine I get the next error:
>>>>
>>>> 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 1 on socket 0
>>>> EAL: Detected lcore 3 as core 1 on socket 0
>>>> EAL: Detected lcore 4 as core 2 on socket 0
>>>> EAL: Detected lcore 5 as core 2 on socket 0
>>>> EAL: Detected lcore 6 as core 3 on socket 0
>>>> EAL: Detected lcore 7 as core 3 on socket 0
>>>> EAL: Support maximum 128 logical core(s) by configuration.
>>>> EAL: Detected 8 lcore(s)
>>>> EAL: VFIO modules not all loaded, skip VFIO support...
>>>> EAL: Setting up physically contiguous memory...
>>>> EAL: Ask a virtual area of 0x600000 bytes
>>>> EAL: Virtual area found at 0x7f9905000000 (size = 0x600000)
>>>> EAL: Ask a virtual area of 0x200000 bytes
>>>> EAL: Virtual area found at 0x7f9904c00000 (size = 0x200000)
>>>> EAL: Ask a virtual area of 0x35400000 bytes
>>>> EAL: Virtual area found at 0x7f98cf600000 (size = 0x35400000)
>>>> EAL: Requesting 430 pages of size 2MB from socket 0
>>>> EAL: TSC frequency is ~2294687 KHz
>>>> EAL: WARNING: cpu flags constant_tsc=yes nonstop_tsc=no -> using 
>>>> unreliable clock cycles !
>>>> EAL: open shared lib librte_pmd_virtio.so
>>>> EAL: Master lcore 0 is ready (tid=634d1c0;cpuset=[0])
>>>> EAL: lcore 1 is ready (tid=cf3f6700;cpuset=[1])
>>>> EAL: PCI device 0000:00:02.0 on NUMA socket -1
>>>> EAL:   probe driver: 1af4:1000 rte_virtio_pmd
>>>> EAL: PCI device 0000:00:03.0 on NUMA socket -1
>>>> EAL:   probe driver: 1af4:1000 rte_virtio_pmd
>>>> EAL: PCI device 0000:00:04.0 on NUMA socket -1
>>>> EAL:   probe driver: 1af4:1000 rte_virtio_pmd
>>>> EAL: PCI device 0000:00:05.0 on NUMA socket -1
>>>> EAL:   probe driver: 1af4:1000 rte_virtio_pmd
>>>> Initializing port 0 ... Creating queues: nb_rxq=1 nb_txq=2... EAL: 
>>>> Error - exiting with code: 1
>>>>    Cause: Cannot configure device: err=-22, port=0
>>>>
>>>> has  someone seen  this error before?
>>>>
>>>> Thank you.
>>>> Mario.
>>>>
>>>>
>>>
>>
>

-- 
Respectfully,
Arseniy.