[ovs-discuss] Analysis of flow rules installation time in the switches

[João Gomes]

Hi Steve,

Thanks for the answer. But that will measure the total time it takes for a
packet to traverse the network and reach it's destination. I think that
will be a very useful benchmark further down the road to measure network
performance.
However, for now, i'm considering only the time it takes for the switch to
actually send out the packet. I am experimenting different strategies to
handle flow misses at the switch and need to benchmark them. For example,
on detecting a link failure the switch could already have an alternative
installed, or it could contact the controller and wait for the new flow
rule; both cases would surely report very different benchmarks.




On Thu, Mar 6, 2014 at 11:47 PM, Steve Noble <snoble at sonn.com> wrote:

> Hi,
>
> I have done this before using an IXIA traffic generator to time the
> installation of the prefixes.
>
> I don't think you need to modify the code, just find a tool to generate
> packets with time stamps and determine the time it takes from the first
> packet sent to the first packet received at the destination.
> On Mar 6, 2014 3:39 PM, "João Gomes" <tsubasapt at gmail.com> wrote:
>
>>  Hello all,
>>
>> I have a network setup in mininet using openvswitch.
>> My switches are using the OpenFlow 1.3 protocol and i am using Ryu as my
>> openflow controller.
>> I am trying to calculate the elapsed time since a switch requests the
>> controller for a new flow rule and the time the rule is installed in the
>> switch.
>>
>> Is this something i can do with openvswitch without modifying any source
>> code? If not, where do you recommend i start looking to be able to this?
>>
>> Any help is appreciated. Thanks.
>>
>> Best Regards!
>>
>>
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>>
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