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Re: [lwip-users] TCP send queue and small windows
From: |
Vlad |
Subject: |
Re: [lwip-users] TCP send queue and small windows |
Date: |
Thu, 22 Mar 2007 11:27:40 +0200 |
User-agent: |
KMail/1.9.5 |
Hi!
i've tried to reduce TCP_SND_QUEUE even to:
#define TCP_SND_QUEUELEN TCP_SND_BUF/TCP_MSS
when i connect to highly loaded server lwip cannot transmit more than 256
bytes at a time at very slow speed.
when i try to send more than 256 bytes at time i event didn't receive sent
confirmation from remove server (lwip didn't call sent handler). and
connection time outs.
lwip calls tcp_rexmit_rto, i checked this. but this doesn't help :(
On Tuesday 20 March 2007 18:32, Kieran Mansley wrote:
> On Tue, 2007-03-20 at 10:35 +0000, Kieran Mansley wrote:
> > On Tue, 2007-03-20 at 12:18 +0200, Vlad wrote:
> > > I've solved this by sending data with smaller chunks at a time ( i call
> > > tcp_write with TCP_MSS bytes at a time ). unfortunately this slows down
> > > uplink.
> >
> > Hmm, I'm sceptical that this has really solved the problem you described
>
> I've just realised that Vlad wasn't the original reporter of this
> problem, and was just suggesting this as a possible workaround. I'd
> assumed he was the same person I'd replied to yesterday - apologies for
> getting muddled. However, I still don't think the above is a complete
> solution.
>
> Kieran
>
>
>
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- [lwip-users] TCP send queue and small windows, Per-Henrik Lundblom, 2007/03/19
- Re: [lwip-users] TCP send queue and small windows, Kieran Mansley, 2007/03/19
- Re: [lwip-users] TCP send queue and small windows, Vlad, 2007/03/20
- Re: [lwip-users] TCP send queue and small windows, Kieran Mansley, 2007/03/20
- Re: [lwip-users] TCP send queue and small windows, Kieran Mansley, 2007/03/20
- Re: [lwip-users] TCP send queue and small windows,
Vlad <=
- Re: [lwip-users] TCP send queue and small windows, Kieran Mansley, 2007/03/22
- Re: [lwip-users] TCP send queue and small windows, Vlad, 2007/03/22
- Re: [lwip-users] TCP send queue and small windows, Kieran Mansley, 2007/03/22
- Re: [lwip-users] TCP send queue and small windows, Vlad, 2007/03/22
- Re: [lwip-users] TCP send queue and small windows, Vlad, 2007/03/22
- Re: [lwip-users] TCP send queue and small windows, Vlad, 2007/03/22