size of kernel after gcc4.2 upgrade

Joao Barros joao.barros at gmail.com
Sat May 26 10:06:04 UTC 2007


On 5/25/07, Eric Anderson <anderson at freebsd.org> wrote:
> On 05/25/07 06:54, Alexander Leidinger wrote:
> > Quoting Ruslan Ermilov <ru at FreeBSD.org> (from Fri, 25 May 2007
> > 14:52:03 +0400):
> >
> >> On Fri, May 25, 2007 at 11:51:46AM +0200, Roman Divacky wrote:
> >>> hi
> >>>
> >>> I just noticed that
> >>> spravci ~# ls -l /boot/kernel*/kernel
> >>> -r-xr-xr-x  1 root  wheel  3389971 May 18 12:03 /boot/kernel.old/kernel*
> >>> -r-xr-xr-x  1 root  wheel  5211345 May 25 11:47 /boot/kernel/kernel*
> >>>
> >>> ie. after gcc42 import the kernel size increased roughly by 60% thats
> >>> a little too much. is there any forgotten option or something that
> >>> makes the kernel grow so big?
> >>>
> >> My numbers are different (1% for the GENERIC kernel, and this
> >> is with all code changes in-between):
> >>
> >> -r-xr-xr-x  1 root  wheel  8942239 Apr 11 16:20 kernel.old/kernel
> >> -r-xr-xr-x  1 root  wheel  9035021 May 24 16:23 kernel/kernel
> >>
> >> bde@ also reported a 1% code bloat in another thread, so I think
> >> you should look at your own changes.
> >
> > My minimal kernel without additional changes shows:
> > -r-xr-xr-x  1 root  wheel   2.5M  7 Apr 17:22 /boot/kernel.old/kernel*
> > -r-xr-xr-x  1 root  wheel   8.1M  7 Apr 17:22 /boot/kernel.old/kernel.symbols*
> > -r-xr-xr-x  1 root  wheel   3.9M 24 Mai 18:46 /boot/kernel/kernel*
> > -r-xr-xr-x  1 root  wheel    14M 24 Mai 18:46 /boot/kernel/kernel.symbols*
> >
> > But this is with debugging (-g) enabled. How's the .symbols generated?
> > Can there be some new stuff in the kernel which needs to be handled in
> > the .symbols file generation?
>
> Hmm.  Here's mine, with debugging, without WITNESS, or INVARIANTS:
>
> $ ls -alh kernel*/kernel
> -r-xr-xr-x  1 root  wheel   7.2M Apr 24 10:24 kernel.old/kernel
> -r-xr-xr-x  1 root  wheel   8.1M May 21 11:22 kernel/kernel
>
> Also - are you compiling in hints, or not?
>
> Eric

Here's my CURRENT from last night with make options untouched:

xeon# ls -lh /boot/kernel*/kernel*
-r-xr-xr-x  1 root  wheel   7.2M Apr 27 20:28 /boot/kernel.old/kernel
-r-xr-xr-x  1 root  wheel    18M Apr 27 20:28 /boot/kernel.old/kernel.symbols
-r-xr-xr-x  1 root  wheel   8.0M May 26 09:49 /boot/kernel/kernel
-r-xr-xr-x  1 root  wheel    22M May 26 09:49 /boot/kernel/kernel.symbols

-- 
Joao Barros


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