Re: Etherboot and gpxe

I think the gPXE rom image is too large. I just compiled the e1000 
driver. Here is the different between gPXE and etherboot:

gPXE:
 ls -l bin/e1000-0x1079.rom
-rw-r--r--  1 joyce wheel 71680 Aug  6  2009 bin/e1000-0x1079.rom

etherboot:
ls -l bin/e1000-82546gb-copper.zrom
-rw-r--r--  1 joyce wheel 27136 Aug  6  2009 bin/e1000-82546gb-copper.zrom

It is about 44k more in gPXE. For x86 system with only 128k option RAM, 
it is really too much.

Thanks,
Joyce

On 08/06/09 16:02, Joshua Oreman wrote:
> On Thu, 2009-08-06 at 15:45 -0700, Joyce Yu wrote:
>   
>> Here is the output of the size. They looked similar:
>> In etherboot;
>>    text    data     bss     dec     hex filename
>>   20937      48   96624  117609   1cb69 xxxx.o
>>
>> In gPXE:
>>    text    data     bss     dec     hex filename
>>   21461      40   96624  118125   1cd6d xxxx.o
>>     
>
> The gPXE driver size is only a tiny bit more (500 bytes). That's a
> *mighty* large driver, though. There are only two in the gPXE tree that
> are larger in .text (tg3 and e1000). For comparison, rtl8139 is 3097
> bytes. It's going to be pretty difficult to make a 32kb ROM, even
> compressed, when your driver is 20kb.
>
> I suspect the difference in .o file sizes comes from the fact that gPXE
> compiles with debugging symbols by default. This does not increase the
> size of the ROM.
>
>   
>> What can I do for the config/defaults.h?
>>     
>
> Ack, oops; I meant config/general.h, sorry. It contains several #defines
> controlling whether gPXE will be compiled with various features.
>
>   
>> If the ROM images has to be more than 32k, it become useless in all my
>> systems. There are other I/O cards share 128k Option ROM space in
>> these systems.
>>     
>
> Are you restricted to exactly 32kb, or can you go a bit over? ROM images
> don't have to be a "nice" size.
>
> -- Josh
>
>   


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