On Wed, Jun 04, 2008 at 12:23:26PM -0700, Tim Bird wrote:
> Sam Ravnborg wrote:
> >> I can do a more controlled comparison if you're interested.
> >
> > What would be really useful would be to do some king of automated
> > monitoring of the size of individual parts of the kernel in
> > a few controlled configs.
> > And then as son as somethings grows with > 1% for example then to
> > bring this to lkml.
> > Doing this based on linux-next would allow us to catch the bloaters
> > while they are still or just have been doing certain changes.
> >
> > It would be nice to tell someone that just enabled som new gcc option
> > that this had a cost of 163.432 bytes with a certain config.
> > This would get attraction and be dealt with.
>
> This is something I've wanted to get done for the last few
> years. We've crept towards it slowly with things like bloatwatch
> and some of the automated testing CELF did for it's (currently
> temporarily defunct) test lab.
>
> But we've never gotten to the last bit, which is to fully automate
> the testing at the top of tree, and send notifications. I won't
> make any promises, but this is something CELF is very interested in,
> and we have parts of the required software already written.
I might be wrong, but although monitoring the size makes a lot of sense
I don't believe "fully automate the testing ... and send notifications"
will work.
Like the CONFIG_LOG_BUF_SHIFT example from my last email you can easily
get huge differences in a defconfig that do not indicate any problem at
all, and I'd expect you'll need frequent finetuning of the .config's
used. And if there's a problem you'll have to identify what exactly
causes the problem.
But if CELF has resources then doing this kind of stuff IMHO makes
more sense than adding a config option for each 5kB of code
(and also has better long-term effects).
> -- Tim
cu
Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed
--
To unsubscribe from this list: send the line "unsubscribe linux-embedded" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
