[ovs-discuss] Setting the tcp buffer

[Deepak Singh]

I am using the unix socket . From ovs-vsctl side i am opening a client socket who send the size of the TCP buffer . And ovs-vswitchd side i am opening the server socket who keep running for client and receive the buffer size and call the setsockopt for fd .
For this FD i am creating a new thread who will get the stream->fd(br->ofproto->ofconn->rconn->vconn_stream->stream->fd) . But one problem is coming when i using HMAP_FOR_EACH (br, node, &all_bridges) and further calling the find_controller_by_target to get ofconn pointer but this ofconn is coming NULL .


-----Original Message-----
From: Ben Pfaff [mailto:blp at nicira.com] 
Sent: 14 January 2015 10:23
To: Deepak Singh
Cc: discuss at openvswitch.org
Subject: Re: [ovs-discuss] Setting the tcp buffer

It's hard to imagine how ovs-vsctl can change the TCP buffer sizes in ovs-vswitchd, maybe you could explain further?

On Wed, Jan 14, 2015 at 02:02:13AM +0000, Deepak Singh wrote:
> packet-in high priority cannot be sent to ODL when TCP buffer on the OFS is congested .
> Yes lib/stream-tcp.c has the code but i have to hand-tune  from ovs-vsctl binary. 
> 
> ________________________________________
> From: Ben Pfaff [blp at nicira.com]
> Sent: 14 January 2015 02:48:19
> To: Deepak Singh
> Cc: discuss at openvswitch.org
> Subject: Re: [ovs-discuss] Setting the tcp buffer
> 
> On Tue, Jan 13, 2015 at 08:49:01AM +0000, Deepak Singh wrote:
> > How can i get the socket fd (send socket) ?  Is the stream_fd  data structure which i have to get ?
> > Actually i am tuning the tcp buffer size from the ovs-vsctl . ovs-vsctl and ovs-vswitch are different binary so i am using the unix sockets to access the socket fd . Is it the right approach ?
> 
> What are you really trying to accomplish?  It isn't usually useful to 
> hand-tune TCP buffer sizes.
> 
> lib/stream-tcp.c has the code that opens and accepts TCP connections, 
> so that might be a good place to adjust buffer size.