Various software sizes calculation

[Joel Sherrill]

Tim Cussins wrote:
> On Tue, 2009-10-06 at 09:29 +0530, Ali Asgar Nasir wrote:
>
>   
>> The .data segment contains the global variables. That’s true.
>>
>> The .text segment contains the code and also the values of all the
>> initialized data in the code, along with the RTEMS code. 
>>     
>
> I thought initialised variables went in .data and uninitialised went
> in .bss ... 
>   
Many BSPs include a second copy of initialized data at the end
of the .text segment which is copied to RAM when the application
is run.

Also there are many other sections.  .rodata, .ctor, .dtor, .init,
.eh_frame, etc.

If the goal of the original post is to trim memory usage down,
then they probably should look at the minimum and low ticker
examples.  It is possible to significantly lower the RAM and
code space usage by tuning a few parameters.

--joel
>                                     
> ________________________________________________________________________
>   
>> From:rtems-users-bounces at rtems.org
>> [mailto:rtems-users-bounces at rtems.org] On Behalf Of Leonard Bise
>> Sent: Monday, October 05, 2009 6:50 PM
>> To: rtems-users at rtems.org
>> Subject: Various software sizes calculation
>>
>>
>>  
>>
>>
>> Hello all, 
>>
>> The questions I have will probably seem quite trivial for most of you
>> guys but I'm a novice in this domain so I'd like some help. 
>>
>> I'm using the RTEMS OS with a LEON2 processor and I need to find out
>> the following sizes for the project : 
>>
>>       * RTEMS Stack Size 
>>       * Total Variables Size 
>>       * Static Data Structure Size 
>>       * Application Code Size 
>>       * RTEMS Code Size
>>
>>
>> I made some research but could not really find out how to find these
>> number, all I know at the moment is that the .data segment of my
>> program is 32'016 bytes, as I understand this the .data segment
>> countain the global variables, is that correct? And .text is 221'760
>> bytes, that's the total code of my application so that'd be RTEMS + My
>> Code, correct? But how can I find out the size of RTEMS and the other
>> sizes in my list? 
>>
>> I hope someone can help me. 
>>
>> Leo.
>>
>>
>> _____________________________________________________________________ 
>>
>> This e-mail message may contain proprietary, confidential or legally
>> privileged information for the sole use of the person or entity to
>> whom this message was originally addressed. Any review, e-transmission
>> dissemination or other use of or taking of any action in reliance upon
>> this information by persons or entities other than the intended
>> recipient is prohibited. If you have received this e-mail in error
>> kindly delete this e-mail from your records. If it appears that this
>> mail has been forwarded to you without proper authority, please notify
>> us immediately at netadmin at patni.com and delete this mail. 
>> _____________________________________________________________________ 
>> _______________________________________________
>> rtems-users mailing list
>> rtems-users at rtems.org
>> http://www.rtems.org/mailman/listinfo/rtems-users
>>     
>
> _______________________________________________
> rtems-users mailing list
> rtems-users at rtems.org
> http://www.rtems.org/mailman/listinfo/rtems-users
>