[ovs-discuss] OVS: Vlan performance on XenServer6

[Justin Pettit]

Hi, Giuseppe.  Thanks for confirming that it's fixed in later builds.  The problem was that all the VLAN packets were going up to userspace.  This is caused by a bug that was fixed in the following commit:

	http://openvswitch.org/cgi-bin/gitweb.cgi?p=openvswitch;a=commit;h=372865

Citrix has confirmed that it will be included in the first Boston (XenServer 5.6) maintenance release.

--Justin


On Nov 14, 2011, at 2:59 AM, Giuseppe Civitella wrote:

> Just in case it can help someone else, I upgraded openvswitch to the
> latest version and the problem vanished:
> ------------------------------------------------------------
> Client connecting to 10.12.0.3, TCP port 5001
> TCP window size: 16.0 KByte (default)
> ------------------------------------------------------------
> [  3] local 10.12.0.4 port 34996 connected with 10.12.0.3 port 5001
> [ ID] Interval       Transfer     Bandwidth
> [  3]  0.0-10.0 sec  1.10 GBytes    941 Mbits/sec
> 
> ethernet driver details:
> [root at xen1 ~]# ethtool -i eth0
> driver: bnx2
> version: 2.0.24b
> firmware-version: 6.2.15 bc 5.2.3 NCSI 2.0.11
> bus-info: 0000:01:00.0
> 
> Best regards,
> Giuseppe
> 
> 
> 
> 2011/11/10 Giuseppe Civitella <giuseppe.civitella at gmail.com>:
>> Hi all,
>> 
>> I've got an openstack setup using XenServer6 as hypervisor platform.
>> Each XS6 server has 2 bond, one for management traffic and the other
>> for VM traffic:
>> 
>> [root at xen1 ~]# ovs-appctl bond/list
>> bridge  bond    type    slaves
>> xapi2   bond1   balance-slb     eth3, eth2
>> xapi1   bond0   balance-slb     eth1, eth0
>> 
>> while management traffic on bond1 does not  require vlans, the virtual
>> machine's traffic on bond0 does.
>> If I measure traffic rate between XS6's hosts and network host on
>> management lan the result is near gigabit as expected:
>> ------------------------------------------------------------
>> Client connecting to 10.1.1.1, TCP port 5001
>> TCP window size: 16.0 KByte (default)
>> ------------------------------------------------------------
>> [  3] local 10.1.1.34 port 56030 connected with 10.1.1.1 port 5001
>> [ ID] Interval       Transfer     Bandwidth
>> [  3]  0.0-10.0 sec  1.10 GBytes   943 Mbits/sec
>> 
>> Even if I do the same test from a virtual machine to a phisical host
>> on the same DMZ I can get similar results.
>> If I check inter vms traffic rate the result is much different.
>> Using iperf on virtual machines running on the same vlan and different
>> XS6 hosts I got:
>> ------------------------------------------------------------
>> Client connecting to 10.12.0.10, TCP port 5001
>> TCP window size: 16.0 KByte (default)
>> ------------------------------------------------------------
>> [  3] local 10.12.0.8 port 47465 connected with 10.12.0.10 port 5001
>> [ ID] Interval       Transfer     Bandwidth
>> [  3]  0.0-10.0 sec    200 MBytes    168 Mbits/sec
>> 
>> Openvswitch version on all the hosts is:
>> ovs-vswitchd (Open vSwitch) 1.0.99
>> Compiled Aug  2 2011 11:50:44
>> OpenFlow versions 0x1:0x1
>> 
>> 
>> Do someone has any suggestion to address this problem?
>> 
>> Thanks a lot
>> Giuseppe
>> 
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