Hi, what hypervisor do you use? There are kernel patches like http://openvswitch.org/pipermail/dev/2013-December/035568.html[1] , http://patchwork.ozlabs.org/patch/324986/[2] that improve VLAN tag handling inside VM. /---/ */Best regards,/* /Eugene Istomin/
Hi, Justin,I used OVS 1.9.3. But there is nothing suspicious in the log when I grep for vlan in the log file. - Hui On Tue, Apr 29, 2014 at 5:28 PM, Justin Pettit <[email protected][3]> wrote: On April 29, 2014 at 2:26:18 PM, Hui Kang ([email protected][4]) wrote:> Hi,> I use iperf to test the 10G performance of OVS bridge with vlan tag added> on the vport for the VMs.>> On each machine, the OVS bridge are created on the Intel 82599 10G NIC. I> found the performance drops significantly when I added vlan tag on the> vport of both VMs.>> no vlan tag: 9.47 Gbps> add vlan tag: 3.96 Gbps>> Is this a normal behavior after adding vlan tag to the packet header? I don't think that should be happening. What version of OVS are you running? Do you see anything suspicious in your ovs-vswitchd.log? -------- [1] http://openvswitch.org/pipermail/dev/2013-December/035568.html [2] http://patchwork.ozlabs.org/patch/324986/ [3] mailto:[email protected] [4] mailto:[email protected]
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