Re: New ethernet driver for the Samsung S3C4510

[Jonathan Larmour <jifl at eCosCentric dot com>]

amit.goel@st.com wrote:
>      Hi,
>      
>      Is there a way by which I can calculate the worst case stack size 
>      being utilized in my embedded application.
>      
>      I am using arm-elf-gcc for compilation.
>      
>      Is there any tool which can help in doing that.

Did you get a reply to this? If not, the answer is that you can try 
enabling  the CDL option CYGFUN_KERNEL_THREADS_STACK_MEASUREMENT and 
reading the option's description there. Then try and provoke your thread 
to produce its worst case.

But you have to understand where this worst case happens which can be 
difficult (it depending on things like the size of automatic stack 
variables), and then also determine what effect interrupts will have on 
your system. Although by default if you are using a separate interrupt 
stack (which is the default) you only have to worry about adding the space 
of one interrupt save context on there. You can use the 
CYGNUM_HAL_STACK_INTERRUPT_SIZE macro defined in <cyg/hal/hal_arch.h> for 
this.

Yes it is difficult, and adding a fudge factor just in case is recommended 
if you can too!

Jifl
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