[En-Nut-Discussion] TCP stops working after some time

[magalhaes]

Hi Harald,

Congratulations for the positive result, uffaa.... I was already very 
worried with that, because this associated the ethernut reliability.
Does continue working after many days?
How do I do to apply the revision in my projects?
 Already this available one in releasing 3.9.3 ?

Best Regards

Magalhaes


----- Original Message ----- 
From: "Harald Kipp" <harald.kipp at egnite.de>
To: "Ethernut User Chat (English)" <en-nut-discussion at egnite.de>
Sent: Monday, January 03, 2005 7:00 AM
Subject: Re: [En-Nut-Discussion] TCP stops working after some time


> Finally I succeeded in reproducing the TCP stack halts
> by running four TCP server threads concurrently exchanging
> data with four clients running on a Win PC.
>
> Simpy protecting the calls to NutEventPostAsync() doesn't
> help, btw. During the implementation of round trip time
> calculation Oliver changed these original NutEventPost()
> calls for good reasons. If application threads are running
> at higher priority than the state machine, they may take
> over. But in most situations the socket's status hasn't
> been fully updated at that point. So I moved the event
> posting (using NutEventPost() again) to the end of the
> state processing.
>
> In the buggy version the test application failed within
> one or two hours. After applying the fixes mentioned
> above it has been running now for several hours without
> any problem. I just committed the changes to CVS HEAD.
> Before releasing 3.9.3 we will run a few more tests.
>
> Harald
>
> At 09:14 22.12.2004 +0100, I wrote:
>
>>We still haven't been successful with reproducing the
>>TCP halt. Using four server threads plus read time out
>>doesn't help. However, the test concentrates on connect
>>and disconnect. Thus, we will now use larger data
>>transfers, exchanging about 20k bytes in both directions
>>during each session. This will trigger more NutEventPostAsync()
>>calls. Most of them are located in data and ACK handling.
>
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>
>
>
>
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