Dell Emulex Family of Adapters - Manual (Page 837)

Emulex Drivers Version 10.2 for Linux User Manual P010081-01A Rev. A
3. Configuration
Ethernet Driver Configuration
837
Support for Ethtool set/get-channels
The Ethtool get-channels command is available in kernel versions of RHEL 6.4, SLES
11.2, and 3.0.x and higher.
The Ethtool get-channels command – “ethtool -l <ethx>” displays the following
information:

the current number of RX/TX/interrupt queue pairs (a “combined channel”)
created by the NIC function

the maximum number of channels supported by the NIC function
Notes:

You can increase (up to the maximum supported limit) or decrease the number
of channels used by the NIC function.

The NIC driver supports only “combined” channels.

The maximum number of channels supported by an interface is also limited to
the number of cpu-cores in the server.
Transmit/Receive Queue Counts
The number of queue counts created by the NIC driver is provided in Table 3-4.
Note: A default Rx queue is created along with the RSS queues.
Table 3-4 Tx and Rx Queue Counts
Profile/Configuration Combined IRQs (for example, RSS and Tx queues)
(Initial/Max)
initial: number of queues available on load
max: number of queues that can be set by set-channels
OCe14002 OCe14004 OCe11102 LPe16000
NIC only 8/31 8/31 8/16 8/17
NIC only SR-IOV PF (num_vfs>0) 1/1 1/1 1/1 8/17
NIC only SR-IOV VF 1/1 1/1 1/1 4/4
NIC only SR-IOV PF (num_vfs>0) 1/1 1/1 8/16 8/17
NIC (UMC, VNIC, NPar) 8/15 8/15 8/16
(first interface,
1/1 otherwise)
n/a