[ovs-discuss] OpenVSwitch latency issues

Chris contact at progbau.de
Tue Nov 4 06:47:28 UTC 2014


Hello Ben,

some feedback regarding the latency issue. We upgraded the kernel module 
and userspace to version 2.3
We now have around 30 - 50 flows, this is a huge improvement! The 
TCP_CRR numbers are looking much better now.
Thanks for the work you put in this!

Do you have any numbers to share comparing the Linux bridge and 
openvswitch regarding TCP_RR and TCP_CRR performance?

Thank you in advance!

Cheers
Chris

On 2014-10-16 23:07, Ben Pfaff wrote:
> How can I find out what version that is?  I am not familiar with how
> OpenStack is distributed.
> 
> On Thu, Oct 16, 2014 at 10:16:11AM +0700, Chris wrote:
>> Hi
>> 
>> It looks like it's the one which comes with OpenStack:
>> 
>> # modinfo openvswitch
>> filename:
>> /lib/modules/2.6.32-431.23.3.el6.x86_64/kernel/net/openvswitch/openvswitch.k
>> o
>> license:        GPL
>> description:    Open vSwitch switching datapath
>> srcversion:     993363C44DF474BD67B03CC
>> depends:        vxlan
>> vermagic:       2.6.32-431.23.3.el6.x86_64 SMP mod_unload modversions
>> 
>> -----Original Message-----
>> From: Ben Pfaff [mailto:blp at nicira.com]
>> Sent: Wednesday, October 15, 2014 22:45
>> To: Chris
>> Cc: discuss at openvswitch.org
>> Subject: Re: [ovs-discuss] OpenVSwitch latency issues
>> 
>> On Wed, Oct 15, 2014 at 06:42:31PM +0700, Chris wrote:
>> > We upgraded the ovs user space version to 2.3.
>> > The kernel module is still the shipped one: CentOS 6.5 Linux
>> > 2.6.32-431.23.3.el6.x86_64
>> 
>> Linux 2.6.32 doesn't come with an openvswitch kernel module, so what 
>> version
>> of the kernel module do you have?  Some performance improvements will 
>> only
>> come with a sufficiently new kernel module.
>> 
>> 



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