Intel® Ethernet Controller E810 Application Device Queues (ADQ)
Configuration Guide
Configure Symmetric Queues
Symmetric queuing method is used for aligning egress/ingress traffic on a pre-configured Tx/Rx queue pair. XPS using receive queues map is used to select transmit queue based on the receive queue(s) map configuration set by the administrator. A 1:1 mapping between receive queues and transmit queues enables sending packets on the same queue associations for transmit and receive.
XPS is only available if the kconfig symbol CONFIG_XPS is enabled. As specified in the kernel build section, the kernel needs to compiled with CONFIG_SMP=y for this. For symmetric transmit queue selection based on receive queues map, xps_rxqs map attribute for the transmit queue needs to be configured using the sysfs file entry.
The following variables are used in the examples in this section:
| $iface | The interface in use (PF or VF). |
| tx-${i} | The transmit queue being configured. |
| $mask | A bitmap of receive queues that might use the transmit queue. |
Automatic configuration can be done easily using the script included in the scripts folder of the ice driver package:
Or configuration can be done manually by echoing a CPU mask into the desired Tx queue's xps_rxqs location:
Example:
This enables egress traffic to be sent on transmit queue 4 when ingress traffic is received on receive queue 4.