Re: Performance optimizations for Intel Core 2 and Core i7 processors

[Maxim Kuvyrkov <maxim at codesourcery dot com>]

On 8/13/10 11:40 PM, Jack Howarth wrote:
> On Mon, May 17, 2010 at 10:44:57AM +0400, Maxim Kuvyrkov wrote:
> > CodeSourcery is working on improving performance for Intel's Core 2 and
> > Core i7 families of processors.
> >
> > CodeSourcery plans to add support for unaligned vector instructions, to
> > provide fine-tuned scheduling support and to update instruction
> > selection and instruction cost models for Core i7 and Core 2 families of
> > processors.
> >
> > As usual, CodeSourcery will be contributing its work to GCC.  Currently,
> > our target is the end of GCC 4.6 Stage1.
> >
> > If your favorite benchmark significantly under-performs on Core 2 or
> > Core i7 CPUs, don't hesitate asking us to take a look@it.
> >
> > We appreciate Intel sponsoring this project.
>
> Maxim,
>      Do you have any updates on the progress of this project? Since
> it has been proposed to default intel darwin to -mtune=core2, it
> would be very helpful to be able to test (benchmark) any proposed
> changes on x86_64-apple-darwin10 with gcc trunk. Thanks in advance.

Jack,

We will start posting patches very soon.  Bernd Schmidt has almost 
finished pipeline model for Core 2/i7, so that will be the first piece 
of work we'll post for upstream review.

Regards,

--
Maxim Kuvyrkov
CodeSourcery
maxim@codesourcery.com
(650) 331-3385 x724