On Wed, 23 Jul 2003, Bernardo Innocenti wrote:
> Hello,
>
> code bloat can be very harmful on embedded targets, but it's
> generally inconvenient for any platform. I've measured the
> code increase between 2.4.21 and 2.6.0-test1 on a small
> kernel configuration for ColdFire:
>
> text data bss dec hex filename
> 640564 39152 134260 813976 c6b98 linux-2.4.x/linux
^^^^^^
> 845924 51204 78896 976024 ee498 linux-2.5.x/vmlinux
[SNIPPED...]
It looks like a lot of data may have been initialized in the
newer kernel, i.e. int barf = 0; or struct vomit = {0,}.
If they just declared the static data, it would end up in
.bss which is allocated at run-time (and zeroed) and is
not in the kernel image.
You might want to check this out. There is 51204 - 39152 = 12,052
more data, but 134260 - 78896 = 55350 less bss.
Cheers,
Dick Johnson
Penguin : Linux version 2.4.20 on an i686 machine (797.90 BogoMips).
Note 96.31% of all statistics are fiction.
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This archive was generated by hypermail 2b29 : Wed Jul 23 2003 - 22:00:50 EST