Re: [patch 00/2] improve .text size on gcc 4.0 and newer compilers

Arjan van de Ven
2006-01-05T18:09:53Z

> There are tools already around to do this sort of thing as well -
> "profile directed optimization" or whatever they called it. Seems to be
> fairly commonly done with userspace, but not with the kernel. I'm not
> sure why not ... possibly because it's not available for gcc ?

gcc has this for sure
the problem is that it expects the profile info in a special format
that.. gets written to a file. So to do it in the kernel you need
SomeMagic(tm), for example to use the kernel profiler but to let it
output it somehow in a gcc compatible format.