[ovs-dev] ovs meters implementation

Fri Jun 10 06:54:43 UTC 2016

Hi, 

I am sorry for the late response. I am working on the implementation of B. 19. 13-Meter action (EXT-379) of OF 1.5.1 to openvswitch. 

The linux kernel meter implementation should likely use "Traffic Control" module of linux. To implement meters we can create a mapping between the meter structures and the tc structures. The tc can then apply the corresponding qdisc, class and filters using the corresponding values from the input meter command. 

You can take a look on [1], [2] mail threads. 
If you have any other idea on the implementation, let me know so we can co-ordinate. 

[1] http://openvswitch.org/pipermail/dev/2016-April/069007.html 
[2] http://openvswitch.org/pipermail/dev/2016-April/069240.html 

Thanks, 
Deepanshu Saxena 
Tata Consultancy Services 
Mailto: deepanshu.saxena1 at tcs.com 
Website: http://www.tcs.com 

To: Ben Pfaff <blp at ovn.org> 
From: Vladimir Shebordaev 
Sent by: "dev" 
Date: 06/08/2016 09:29AM 
Cc: dev at openvswitch.org 
Subject: Re: [ovs-dev] ovs meters implementation 

2016-06-08 6:29 GMT+03:00 Ben Pfaff <blp at ovn.org>: 

> On Wed, Jun 08, 2016 at 06:10:50AM +0300, Vladimir Shebordaev wrote: 
> > I would like to work on OF meter implementation. It is said to be 
> > missing from both userspace and kernel datapaths, though it is 
> > implemented in the protocol. It is also said that attempts were made 
> > to implement it and the patches have been declined for various 
> > reasons but they are still su 
> g 
> gested as a starting point. 
> > 
> > Well, as far as I could find it on the list, a few years ago there was 
> > a patch series that proposed an implementation in userspace but it was 
> > dropped almost without a comment. 
> 
> I agree that it would be nice to support meters. 
> 
> The last posted implmentation was in December 2015. I provided a review: 
> http://openvswitch.org/pipermail/dev/2015-December/063724.html 
> I believe that if the problems I cited were fixed, this would be 
> suitable for inclusion in OVS. 
> 
> 
OK, thank you, it is axactly the patch series I was talking about but I 
missed your comments. I should study those patches in detail before I can 
continue on. 

> Are there any design documents around? I would like to made consistent 
> > implemention both it kernel and userspace datapaths, so there is 
> > something to discuss, I guess. 
> 
> What kind of design information are you looking for? 
> 

Basically, I mean I would like to also implement the meters in kernel 
datapath, so it would be nice to have consistent implementations. Sure, if 
it is possible. 
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