RE: [lwip-users] LWIP configuration to maximize TCP throughput givenRAM constraints

[Kieran Mansley]

On Wed, 2008-10-15 at 13:26 +0800, Bruce Sutherland wrote:

> Now, I looked at all your options and how they differ from defaults. Changes
> you made which seem most likely to affect TCP performance are as follows:
> 
> TCP_MSS increased from 128 to 1460
> TCP_SND_BUF correspondingly increased to 1460 * 2

Those are the important ones, together with TCP_WND if you're receiving
data.  Making SND_BUF and TCP_WND large enough that you're able to get
enough data onto the network in each round trip time so you (or the
other end) are not waiting for ACKs is the biggest hurdle.

Kieran