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

[Jordan Crouse]

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
-- 
Jordan Crouse
Senior Linux Engineer
Advanced Micro Devices, Inc.
<www.amd.com/embeddedprocessors>