[ovs-discuss] OVS: Vlan performance on XenServer6

Giuseppe Civitella giuseppe.civitella at gmail.com
Mon Nov 14 10:59:32 UTC 2011


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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