More on compile performance of Linux kernels in mainline gcc

[Jan Hubicka]

> Andi Kleen <ak@suse.de> writes:
> 
> > This is an addendum for the numbers for linux kernel compiling
> > on x86-64 I posted some days ago. gcc tested is the same (041029)
> > on the same machine with the same kernel tree/configuration.
> 
> I can't comment on most of this, but:
> 
> > Looks like the likely/unlikely split is not very effective,
> > there are a lot of hot unlikely hits. 
> 
> That logic has known bugs.  You could try disabling it

I didn't look too closely on Caroline's work, but what bugs do you know
of?

Honza