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AW: [lwip-users] LWIP size

From: Mathias Zenger
Subject: AW: [lwip-users] LWIP size
Date: Thu, 1 Oct 2009 07:09:31 +0200

check this:

-----Ursprüngliche Nachricht-----
Von: address@hidden [mailto:address@hiddenIm Auftrag von Dany Thiffeault
Gesendet: Mittwoch, 30. September 2009 17:42
An: Mailing list for lwIP users
Betreff: Re: [lwip-users] LWIP size

Thanks Bill, good idea. 

I'm still trying to figure out how to generate the MAP file with AVRStudio 2.1...

On Tue, Sep 29, 2009 at 5:30 PM, Bill Auerbach <address@hidden> wrote:

Check you MAP file and find out where RAM has been allocated.  It’s easy to allocate too many PBUF_POOLs and run out of memory that way.




From: lwip-users-bounces+bauerbach=arrayonline.com@nongnu.org [mailto:lwip-users-bounces+bauerbach=arrayonline.com@nongnu.org] On Behalf Of Dany Thiffeault
Sent: Tuesday, September 29, 2009 3:56 PM
To: Mailing list for lwIP users
Subject: [lwip-users] LWIP size




I would like to know what is the expected (approx.) size of the lwip stack. I use sequential configuration. My problem is that on my AVR32, I only have 64kbytes of SRAM and for some reasons, it is full. I'm trying to run my application using FreeRTOS and lwip. When I create tasks, my last one always fail on the malloc.


So, I'm assuming that FreeRTOS and lwip take a significant amount of space on my AVR32 in SRAM because my tasks have those sizes (presented in order of creation):


1- lwip Main task:                        512

2- Startup task (my own):            512

3- FreeRTOS Scheduler:             256

4- Ethernet task (my own):          512

5- Ethif (lwip):                             256

6- Diags task (my own):              512


The last one is the one that fails. So, out of 64kbytes, my tasks take much less memory. I another project not using lwip, I was able to create 3 tasks of 1024,  4096 and 4096 of size. So, I presume lwip takes a significant amount of space.


If yes, how could I tweak the config to reduce the size taken?


Best regards,


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