[ECOS] Stack usage measurement

Szentirmai Gergely reg@t-online.hu
Tue Apr 21 08:08:00 GMT 2009



Gary Thomas írta:
> Ross Younger wrote:
>> Szentirmai Gergely wrote:
>>> Does anybody has a estimation about the stack usage of pintf stuff? [...]
>>> As a summary, I would have to avoid the usage of any printf if I'm short
>>> of memory?
>> printf (or, more precisely, the actual format conversion in vfnprintf) is
>> really quite a complicated function. This regularly bites people on limited
>> targets; sometimes simply using printf is enough to cause your application
>> to fail to link because it won't fit into RAM.
>>
>> If you don't need to print out floating point numbers, you might save a
>> little code size by disabling that support in your eCos config. Otherwise,
>> puts and putc are pretty lean and mean - you could save a lot of code and
>> stack if you can avoid printf in your application.
> 
> Good points, but 'diag_printf()' is already quite stripped; no floating point.
> 

Thank you for your suggestions. I'll keep them in my mind.

Best wishes!
Gergely

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