Hello, I was testing how the OVS-DPDK will perform when putted into cgroup. To my surprise, the performance raises once ovs-vswitchd process was able to consume only 50% of CPU. Here's what I've done:
1. I have configured OVS to use dpdk and to run on core no 2; 2. I have created bridge with datapath_type=netdev, added a dpdk interface to it and connected a VM to this bridge via vhostuser port; 3. I have created new cgroup, set the cpu.shares to 512 and added the pid of ovs-vswitchd process to tasks; At that point, I measured the throuhput from the VM, via the dpdk interface to the external machine using iperf3: iperf3 -c 192.168.0.3 -M 104 The bandwith was around 40Mb/s. After that: 4. I have started stress process to stress one core (# stress -c 1); 5. I have added the stress process to cgroup created in point 3; 6. Using taskset, I've put stress on same core as ovs-vswitchd; Then I run the iperf3 again, with same command. The bandwith was around 100 Mb/s.Can this be explained somehow? The tests were run on host with Atom CPU (Intel(R) Atom(TM) CPU C2758 @ 2.40GHz). Thanks, Dawid Deja
