Re: [lwip-users] How to force dup ACK

[yueyue papa]

Is there a suggestion for my current situation?

I was required to make faster TCP interact.

But smaller TSS, cause long ACK times, lower performance.

Big TSS cause ACK lost, still poor performance.

On Thu, Apr 15, 2010 at 6:14 PM, Kieran Mansley <address@hidden> wrote:
> On Thu, 2010-04-15 at 18:06 +0800, yueyue papa wrote:
>> The problem is easy to meet in  larger TSS 1460, but with 512 TSS , I
>> could see the send/receive is very stable.
>
> The likely reason for this is that with a smaller MSS you have more
> segments per window, and because we ACK every other segment you have
> more ACKs per window, and so the effect of any one ACK being lost is
> diminished - you'll probably receive another one soon after the lost one
> and so be able to carry on as ACKs are cumulative.
>
>> Kieran, could you guild me to add code for force send duplicate ACK
>
> No, this is not the right solution.
>
> Kieran
>
>
>
> _______________________________________________
> lwip-users mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/lwip-users
>