RE: [lwip-users] LWIP size

[Bill Auerbach]

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.

 

Bill

 

From: address@hidden [mailto:address@hidden On Behalf Of Dany Thiffeault
Sent: Tuesday, September 29, 2009 3:56 PM
To: Mailing list for lwIP users
Subject: [lwip-users] LWIP size

 

Hi,

 

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,

DownyTif.