Re: [lwip-users] Dropped UDP packages

[Emil Ohlsson]

Actually I'm using a TI Stellaris Cortex M3 (LM3S9B96). What kind of flaws 
where you thinking of?

Thanks
Emil Ohlsson

-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of Andrew Foster
Sent: den 18 augusti 2011 15:11
To: Mailing list for lwIP users
Subject: Re: [lwip-users] Dropped UDP packages

Emil,

I've had to debug a similar event on my target and found it helpful to get 
familiar with stats.c. The various compiler switches can be found in 
lwipopts.h(sounds like you are already aware of UDP_STATS.) More specifically, 
look in to MEM, MEMP, PBUF and SYS stats. Verify you don't have any errors in 
these paths before getting down and dirty with your ISR. I know the Luminary/TI 
ISR has some flaws but hopefully your target platform's ISR has been 
implemented correctly.

Hope this helps,

Andrew



On 08/18/2011 08:59 AM, Emil Ohlsson wrote:
> Hi!
>
> I'm writing and application that listens for RTP-packages via UDP multicast. 
> But for some reason there is a small package drop, say 1 per 1000 packets.
>
> I've activated UDP stats and it seems like lwIP doesn't think there are any 
> dropped packets, but from my application I can see that there are missing 
> sequence numbers. And I can see that those packages are being sent using 
> wireshark.
>
> Does lwIP discard packages if the application isn't fast enough to 
> fetch them? Could there be any other thing I've missed? Could there be 
> some memory issue? Any comments or ideas are very welcome
>
> Best regards
> Emil Ohlsson
>
> _______________________________________________
> lwip-users mailing list
> address@hidden
> https://lists.nongnu.org/mailman/listinfo/lwip-users

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