Hi,

To correlate between PCI device and net device in linux you can inspect sysfs:

# ls -l /sys/bus/pci/devices/<PCI_DEVICE_ADDRESS>/net

To correlate between net device and PCI device:

# ls -l /sys/class/net/<NET_DEVICE>/device

a Virtual PCI function (VF) will have a pointer to its Physical function (PF)

/sys/bus/pci/devices/<PCI_DEVICE_ADDRESS/physfn

If the file doesn’t exist you can assume it’s a PF.

Thanks,

                Adrian.

From: Manuel Sopena Ballesteros <manuel.sb@garvan.org.au>
Sent: Thursday, February 21, 2019 8:06 AM
To: openstack@lists.openstack.org
Subject: how to find the interfaces to exclude in SR-IOV?

Hi,

I would like to exclude a couple of VFs from the neutron SR-IOV configuration…

According to documentation https://docs.openstack.org/neutron/latest/admin/config-sriov#enable-neutron-sriov-nic-agent-compute

exclude_devices = eth1:0000:07:00.2;0000:07:00.3,eth2:0000:05:00.1;0000:05:00.2

This is my configuration

[root@zeus-59 ~]# ibdev2netdev -v

0000:88:00.0 mlx5_0 (MT4117 - MT1611X10113) CX4121A - ConnectX-4 LX SFP28 fw 14.24.1000 port 1 (ACTIVE) ==> bond0 (Up)

0000:88:00.1 mlx5_1 (MT4117 - MT1611X10113) CX4121A - ConnectX-4 LX SFP28 fw 14.24.1000 port 1 (ACTIVE) ==> bond0 (Up)

0000:88:01.2 mlx5_10 (MT4118 - NA)  fw 14.24.1000 port 1 (ACTIVE) ==> enp136s1f2 (Up)

0000:88:01.3 mlx5_11 (MT4118 - NA)  fw 14.24.1000 port 1 (ACTIVE) ==> enp136s1f3 (Up)

0000:88:01.4 mlx5_12 (MT4118 - NA)  fw 14.24.1000 port 1 (ACTIVE) ==> enp136s1f4 (Up)

0000:88:01.5 mlx5_13 (MT4118 - NA)  fw 14.24.1000 port 1 (ACTIVE) ==> enp136s1f5 (Up)

0000:88:01.6 mlx5_14 (MT4118 - NA)  fw 14.24.1000 port 1 (ACTIVE) ==> enp136s1f6 (Up)

0000:88:01.7 mlx5_15 (MT4118 - NA)  fw 14.24.1000 port 1 (ACTIVE) ==> enp136s1f7 (Up)

0000:88:02.0 mlx5_16 (MT4118 - NA)  fw 14.24.1000 port 1 (ACTIVE) ==> enp136s2 (Up)

0000:88:02.1 mlx5_17 (MT4118 - NA)  fw 14.24.1000 port 1 (ACTIVE) ==> enp136s2f1 (Up)

0000:88:00.2 mlx5_2 (MT4118 - NA)  fw 14.24.1000 port 1 (ACTIVE) ==> ens2f2 (Up)

0000:88:00.3 mlx5_3 (MT4118 - NA)  fw 14.24.1000 port 1 (ACTIVE) ==> ens2f3 (Up)

0000:88:00.4 mlx5_4 (MT4118 - NA)  fw 14.24.1000 port 1 (ACTIVE) ==> ens2f4 (Up)

0000:88:00.5 mlx5_5 (MT4118 - NA)  fw 14.24.1000 port 1 (ACTIVE) ==> ens2f5 (Up)

0000:88:00.6 mlx5_6 (MT4118 - NA)  fw 14.24.1000 port 1 (ACTIVE) ==> ens2f6 (Up)

0000:88:00.7 mlx5_7 (MT4118 - NA)  fw 14.24.1000 port 1 (ACTIVE) ==> ens2f7 (Up)

0000:88:01.0 mlx5_8 (MT4118 - NA)  fw 14.24.1000 port 1 (ACTIVE) ==> enp136s1 (Up)

0000:88:01.1 mlx5_9 (MT4118 - NA)  fw 14.24.1000 port 1 (ACTIVE) ==> enp136s1f1 (Up)

ens2f2 (0000:88:00.2) and ens2f3 (0000:88:00.3) are part of bond0 which I want to assign to OVS.

I would like to do something like:

exclude_devices = <ethX>:0000:88:00.2,<ethY>0000:88:00.3

How can I find out ethX and ethY? Are they PFs?

Thank you very much

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