This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: More on compile performance of Linux kernels in mainline gcc
- From: Jan Hubicka <hubicka at ucw dot cz>
- To: Zack Weinberg <zack at codesourcery dot com>
- Cc: Andi Kleen <ak at suse dot de>, gcc at gcc dot gnu dot org
- Date: Wed, 3 Nov 2004 09:36:50 +0100
- Subject: Re: More on compile performance of Linux kernels in mainline gcc
- References: <20041103045252.GA15944@wotan.suse.de> <87r7nbqtss.fsf@codesourcery.com>
> 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