Unbinding Network Ports; Performance Tuning - Chelsio Communications Terminator Series Installation And User Manual

Chapter XXIV. DPDK Driver
5.3.

Unbinding Network Ports

i. Run the following command to unbind network ports from DPDK environment:
[root@host~]# dpdk-devbind.py --unbind <PCI-ID-PF4/VF-PCI-ID>
ii. Run the following command to verify:
[root@host~]# dpdk-devbind.py --status
Example:
5.4.

Performance Tuning

In order to auto tune the system for best performance, Chelsio recommends:
•
Disabling virtualization, c-state technology, Intel I/O AT and SR-IOV in the BIOS settings.
•
Setting the Power Profile to Maximum Performance in BIOS settings.
•
Installing the adapter into a PCIe Gen3 x8/x16 slot.
•
Allocating required number of mbufs in the application based on the below formula.
nb_mbufs = ((2 * nb_tx_desc * nb_tx_q) + (nb_rx_desc * nb_rx_q)) * nb_ports
Where,
nb_mbufs : Number of mbufs
nb_tx_desc : Number of Tx descriptors
nb_rx_desc : Number of Rx descriptors
nb_tx_q : Number of Tx queues
nb_rx_q : Number of Rx queues
nb_ports : Number of ports
•
Using traffic with multiple tuples. The 'range' option of DPDK-Pktgen app can be used to
create traffic with different 4-tuple values, to take advantage of RSS and hence, allow the
traffic to be distributed across different queues/CPUs in Rx direction.
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