Re: [dpdk-dev] Question on using SR-IOV with dpdk apps

["Richardson, Bruce" <bruce.richardson@intel.com>]

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Anjali Kulkarni
> Sent: Monday, August 04, 2014 12:45 PM
> To: dev@dpdk.org
> Subject: Re: [dpdk-dev] Question on using SR-IOV with dpdk apps
> 
> Forgot to clarify, this is a specialized app, and the first parameter of
> each () is the dpdk port no.
> 
> On 8/4/14 12:43 PM, "Anjali Kulkarni" <anjali@juniper.net> wrote:
> 
> >Hi,
> >
> >I am using SR-IOV and pass through to run a DPDK app. I am running it on
> >host. SR-IOV should split the NIC into multiple Vfs. I have split each NIC
> >into 2 Vfs. However, when I run the DPDK app, I get error initializing the
> >port no.2 of DPDK.
> >I am running the app with these options:
> >--rx "(0,0,0,1),(1,0,2,1), (2,0,3,1), (3,0,4,1)" --tx "(0,1), (1,1),
> >(2,1), (3,1)"
> >
> >This is for 2 physical NICs, each having 2 Vfs. The error I get is:
> >
> >Initializing NIC port 0 ...                                    |
> >|RPIOIF DETACHED
> >|Initializing NIC port 0 RX queue 0 ...                         |
> >|
> >|Initializing NIC port 0 TX queue 0 ...                         |
> >|HOSTIF DETACHED
> >|Initializing NIC port 1 ...                                    |
> >|
> >|Initializing NIC port 1 RX queue 0 ...                         |
> >|
> >|Initializing NIC port 1 TX queue 0 ...                         |
> >|
> >|Initializing NIC port 2 ...                                    |
> >|
> >|PANIC in app_init_nics():                                      |
> >|
> >|Cannot init NIC port 2 (-22)
> >
> >
> >Can someone pls clarify how DPDK views it's port nos, i.e. Scans the
> >devices and sees each nic? I see 4 /dev/uioX devices. I assume it scans
> >for these igb_uio devices. These are present. Then why can it not detect
> >the other 2 NICs?
> >
> >Thanks
> >Anjali
> >

Hi,

For debugging issues with PCI devices not being found, can you please include the output from the EAL on startup, especially any messages concerning the PCI bus scan being done.

Regards,
/Bruce