[dpdk-dev] DPDP crash with sr-iov (with ESXi 5.5 hypervisor)

[dpdk-dev] DPDP crash with sr-iov (with ESXi 5.5 hypervisor)

[Vithal Mohare]

Hi,

While initializing pci port (VF) DPDK is crashing while configuring the device.  Reason/location:
                PMD: rte_eth_dev_configure: ethdev port_id=1 nb_rx_queues=8 > 2
EAL: Error - exiting with code: 1

System info:
DPDK version: 2.0
NIC: 82599EB, sr-iov enabled.
SR-IOV config at ESXi 5.5 hypervisor host: max_vfs=2
Guest OS: Linux OS based.  Driver: ixgbevf.ko

VM is configured with 3 vCPUs.  Before linking the port to DPDK, I see that, pci device (VF) comes up with 8 rx/tx queues (using native kernel driver ixgbevf.ko, /sys/class/net/ethx/queues/*).  But DPDK code expect max queues for device to be '2' and hence the crash.   Am I missing anything here?  Appreciate for any suggestions/fixes for the issue.

Thanks,
-Vithal

Re: [dpdk-dev] DPDP crash with sr-iov (with ESXi 5.5 hypervisor)

[Lu, Wenzhuo]

Hi Vithal,
The number of VF queues is decided by PF. Suppose you use kernel driver for PF. So the queue number is decided by PF kernel driver.
I have a 82599ES, and find no matter ixgbevf or dpdk igb_uio is used, the rx queue number is 2. Frankly, I believe 2 is the expected number. Surprised that you get 8 when using ixgbevf.
Hope this can help. Thanks.

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Vithal Mohare
> Sent: Wednesday, December 23, 2015 12:32 PM
> To: dev@dpdk.org
> Subject: [dpdk-dev] DPDP crash with sr-iov (with ESXi 5.5 hypervisor)
> 
> Hi,
> 
> While initializing pci port (VF) DPDK is crashing while configuring the device.
> Reason/location:
>                 PMD: rte_eth_dev_configure: ethdev port_id=1 nb_rx_queues=8 >
> 2
> EAL: Error - exiting with code: 1
> 
> System info:
> DPDK version: 2.0
> NIC: 82599EB, sr-iov enabled.
> SR-IOV config at ESXi 5.5 hypervisor host: max_vfs=2 Guest OS: Linux OS
> based.  Driver: ixgbevf.ko
> 
> VM is configured with 3 vCPUs.  Before linking the port to DPDK, I see that,
> pci device (VF) comes up with 8 rx/tx queues (using native kernel driver
> ixgbevf.ko, /sys/class/net/ethx/queues/*).  But DPDK code expect max
> queues for device to be '2' and hence the crash.   Am I missing anything here?
> Appreciate for any suggestions/fixes for the issue.
> 
> Thanks,
> -Vithal