LF_OVS_17_OVS-DPDK: Every cycle counts.

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Open vSwitch Fall Conference 2017

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OVS-DPDK: Every cycle counts
OVS-DPDK Datapath workload distribution
Kevin Traynor
ktraynor@redhat.com
16th November 2017

3
Then came multiple PMD's (cores)
# ovs-vsctl set Open_vSwitch . other_config:pmd-cpu-mask=0x3

4
Then came multiple Receive queues
# ovs-vsctl set Interface dpdkport0 options:n_rxq=2
# ovs-vsctl set Interface dpdkport1 options:n_rxq=2

6
Manually pin fat queue...but it doesn't scale
# ovs-vsctl set Interface dpdkport1 options:pmd-rxq-affinity=0:1

7
Another way...count cycles/core utilisation

8
The next time queues are assigned to PMDs
# ovs-appctl dpif-netdev/pmd-rxq-rebalance
Also, manually with

THANK YOU
plus.google.com/+RedHat
linkedin.com/company/red-hat
youtube.com/user/RedHatVideos
facebook.com/redhatinc
twitter.com/RedHatNews

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LF_OVS_17_OVS-DPDK: Every cycle counts.

1. OVS-DPDK: Every cycle counts OVS-DPDK Datapath workload distribution Kevin Traynor ktraynor@redhat.com 16th November 2017

2. 2 First came OVS-DPDK

3. 3 Then came multiple PMD's (cores) # ovs-vsctl set Open_vSwitch . other_config:pmd-cpu-mask=0x3

4. 4 Then came multiple Receive queues # ovs-vsctl set Interface dpdkport0 options:n_rxq=2 # ovs-vsctl set Interface dpdkport1 options:n_rxq=2

5. 5 But what if this happens...

6. 6 Manually pin fat queue...but it doesn't scale # ovs-vsctl set Interface dpdkport1 options:pmd-rxq-affinity=0:1

7. 7 Another way...count cycles/core utilisation

8. 8 The next time queues are assigned to PMDs # ovs-appctl dpif-netdev/pmd-rxq-rebalance Also, manually with

9. 9 Demo https://youtu.be/gkYLFtoQruI

10. THANK YOU plus.google.com/+RedHat linkedin.com/company/red-hat youtube.com/user/RedHatVideos facebook.com/redhatinc twitter.com/RedHatNews