Hi, Justin Today I have upgrade the OVS to 2.1.2 and use the vlan splinter option. However, there is no improvement on the iperf test with vlan; the throughput of using vlan is still half of without vlan.
During the test, I use ovs-dpctl dump-flows and observer that are additional actions of push_vlan and pop_vlan. So I am wondering if the performance degradation is caused by these operations. Have anyone observer 10G performance with OVS vlan access port? Thanks. - Hui On Tue, Apr 29, 2014 at 5:59 PM, Justin Pettit <[email protected]> wrote: > On April 29, 2014 at 2:56:49 PM, Hui Kang ([email protected]) wrote: > > Hi, Justin, > > Thanks for your suggestions. My concern is that vlan works for my test > > cases and no packet drops with the iperf TCP test. However, the problem > is > > about performance loss compared to no vlan tag is set on the vport. > > > > Regarding vlan splinter, the FAQ says "VLAN splinters increase memory use > > and reduce performance, so use them only if needed." So I guest it will > not > > improve the throughput performance. > > That's mostly in there to prevent people from trying it unless they really > need it. I'd give it a try if I were you. > > > Anyway, I will try a different kernel version and see if it improves. > > If you're looking at upgrading parts, I'd recommend upgrading to a newer > version of OVS, too. There have been substantial improvements since 1.9.x. > > --Justin > > > >
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