Re: [lwip-users] New lwip user - large bss size

[Ed Sutter]

David,
You should be able to run "size" in the individual
file objects to better determine which file is
hogging your bss space.
Ed

> David Aldrich wrote:
> 
> Hi
> 
> I am a new user of lwip.  My target hardware is an embedded processor on an 
> FPGA.  I have been given an "unofficial"
> port of lwip for this processor by a third party.  The port and a small http 
> server application run successfully on a
> reference hardware design that has 1MB of data (i.e. not instruction) memory. 
>  However, the port will not run on our
> target hardware that has only 128KB of data memory.
> 
> Running the GNU size utility on our object file gives:
> 
>    text    data     bss     dec     hex filename
>  103422    1888  558012  663322   a1f1a test.out
> 
> So you can see that the bss (uninitialised global data) size is >500KB, which 
> is very large.  This is with a minimum
> application, so the data must be being mostly allocated for the port and lwip.
> 
> I would welcome any suggestions of how to find what is using this large 
> amount of memory.  Is there a standard .h file
> in lwip that defines sizes of buffers etc?
> 
> What are typical data requirements of lwip?
> 
> Thanks for any help you can provide.
> 
> David
> 
>       
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