[OLPC-devel] Re: Not so good news (Was: good news)

[Ronald G Minnich]

Jordan Crouse wrote:
> On 02/08/06 14:43 -0600, Ronald G Minnich wrote:
> 
>>Carl-Daniel U. Hailfinger wrote:
>>
>>I just want to NOT put a lot of time into this if we are going to then 
>>jump to lzma. I don't want to thrash around a lot on this. I also want 
>>to make sure that at every point, buildrom is usable by everyone -- no 
>>surprises for users. That's why I wanted to hold off on the commits -- 
>>one thing at a time.
> 
> 
> I agree - if we're going to lzma, no need for the intermediate step.
> 
> 
>>Also, when I did measure it, I found that
>>the size of (bzImage + gzip'ed initrd) was smaller than (nrv2b 
>>compressed mkelfimage output with vmlinux and initrd). Maybe something 
>>changed, but I would like to see the numbers one more time on final 
>>output. So do a buildrom pass and let me know what you're seeing on olpc 
>>.elf file vs. what you are doing. Final numbers of the payload, I mean.
> 
> 
> nrv2b(vmlinux + initrd.uncompressed):
> 
> Payload 808426 (76310 bytes free in ROM)
> 
> bzImage + initrd.gz:
> 
> 825175 bytes (59561 bytes free in ROM)
> 
> Thats a delta of 16k.35 Kbytes.
> 
> Jordan

but we still need to size the delta in linuxbios for using decompressor.

ron