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Re: [lwip-users] Re transmission behaviour?
From: |
Simon Goldschmidt |
Subject: |
Re: [lwip-users] Re transmission behaviour? |
Date: |
Mon, 02 Jul 2012 17:39:23 +0200 |
Fred39 <address@hidden> wrote:
> LWIP is the slave which response!
Just to rule out any uncertainties, this would be 192.168.0.222 in your
captures (that would be the info requested, simply put)?
In that case, how can you change the tcp timer interval of the master? Or isn't
that what you did?
> http://old.nabble.com/file/p34102440/master2sec.pcap master2sec.pcap
> http://old.nabble.com/file/p34102440/master30msec.pcap master30msec.pcap
>
> here are 2 packets one with 30msec master cycle one with 2 seconds hope
> this
> helps by diagnose my problem
The RTO (retransmission timeout, based on the connection's RTT) is initialized
to 3 seconds in lwIP. Given the fact that your lwIP retransmits after 60ms
right at the start of the connection (where there was no time yet to lower the
RTT or RTO - we need ACKed data for that), it actually seems that your TCP
timer is running way too fast. Please ensure it is configured to run every
250ms and that this timing actually works (e.g. by toggeling an IO pin of your
target from tcp_tmr()).
Simon
- Re: [lwip-users] Re transmission behaviour?, Fred39, 2012/07/02
- Re: [lwip-users] Re transmission behaviour?, Simon Goldschmidt, 2012/07/02
- Re: [lwip-users] Re transmission behaviour?, Fred39, 2012/07/02
- Re: [lwip-users] Re transmission behaviour?, Simon Goldschmidt, 2012/07/02
- Re: [lwip-users] Re transmission behaviour?, Pomeroy, Marty, 2012/07/02
- Re: [lwip-users] Re transmission behaviour?, Simon Goldschmidt, 2012/07/02
- Re: [lwip-users] Re transmission behaviour?, Kieran Mansley, 2012/07/02
- Re: [lwip-users] Re transmission behaviour?, Kieran Mansley, 2012/07/02
- Re: [lwip-users] Re transmission behaviour?, Pomeroy, Marty, 2012/07/02
- Re: [lwip-users] Re transmission behaviour?,
Simon Goldschmidt <=
- Re: [lwip-users] Re transmission behaviour?, Kieran Mansley, 2012/07/02
- Re: [lwip-users] Re transmission behaviour?, Fred39, 2012/07/03