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Re: [lwip-users] Slow sending speed
From: |
Kieran Mansley |
Subject: |
Re: [lwip-users] Slow sending speed |
Date: |
Tue, 23 Dec 2008 10:09:23 +0000 |
On Mon, 2008-12-22 at 23:51 +0100, Sebastian wrote:
> Hello,
>
> as the title already says, I've got a problem with the sending speed, which
> is
> extremly slow. My platform is a LPC2468 Controller from NXP with an ARM
> Core.
> It seems the problem is that lwIP sometimes holds back packets and waits for
> the next ACK of the packet just sent. According to a typical TCP session, the
> remote station expects a second packet and waits for 200ms before it's sends
> the ACK. After that, lwIP will send the next packets.
Sounds like bad interaction between the Nagle algorithm on the sender
and the delayed ACK algorithm on the receiver.
Kieran