[ovs-discuss] pps throughput depending on the number of flows

Alexander Shalimov ashalimov at arccn.ru
Wed Sep 3 17:17:44 UTC 2014


There was Open vSwitch 2.2, single flow rule (ofctl) moving packets from 
one physical ports to another one. Each physical port was 10Gb (dual 
port Intel x520 card).

Our test setup consists of three hosts and two physical switches: a host 
1 with custom traffic gen (netmap based)  -> physical switch 1 ->  a 
host 2 with OVS -> physical switch 2 -> an end host  3

We recorded numbers on physical switches.

С уважением, |  Sincerely,
Александр.   |  Alexander.

On 9/3/2014 4:51 PM, MCGRATH, GIL wrote:
> I would be interested in what tools you are using for measurement
>
> From: yimeng zhao <exaheart at gmail.com <mailto:exaheart at gmail.com>>
> Date: Wednesday, September 3, 2014 at 8:08 AM
> To: Alexander Shalimov <ashalimov at arccn.ru <mailto:ashalimov at arccn.ru>>
> Cc: "discuss at openvswitch.org <mailto:discuss at openvswitch.org>" 
> <discuss at openvswitch.org <mailto:discuss at openvswitch.org>>
> Subject: Re: [ovs-discuss] pps throughput depending on the number of flows
>
> Could you specify your configuration of measurement?
>
>
> 2014-09-02 22:54 GMT+02:00 Alexander Shalimov <ashalimov at arccn.ru 
> <mailto:ashalimov at arccn.ru>>:
>
>     Hi,
>
>     We recently finished with throughput measurements of OVS. We saw
>     that phy-to-phy throughput became higher with the increasing
>     number of flows:
>     #1. 1 flow, phy-to-phy, 64 bytes packets => 1Mpps
>     #2. 32 flows (1 src ip, 32 dst ips), phy-to-phy, 64 bytes packets
>     => 9Mpps
>
>     Could anyone explain why that happens: for 1 flow we have only
>     1Mpps, but for 32flows we have 9Mpps? It seems to be related to
>     multicore and concurrency. But where is this code located (flow
>     scheduling and etc)?
>
>     Thanks and Regards!
>
>     -- 
>     С уважением, |  Sincerely,
>     Александр.   |  Alexander.
>
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>

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