[ovs-discuss] poor performance after adding vlan tag to a vport

[Eugene Istomin]

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 <jpettit at nicira.com[3]> 
wrote:


On April 29, 2014 at 2:26:18 PM, Hui Kang (hkang.sunysb at gmail.com[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:jpettit at nicira.com
[4] mailto:hkang.sunysb at gmail.com
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