Performance optimizations for Intel Core 2 and Core i7 processors

[Maxim Kuvyrkov]

On 5/20/10 4:04 PM, Steven Bosscher wrote:
> On Mon, May 17, 2010 at 8:44 AM, Maxim Kuvyrkov<maxim@codesourcery.com>  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 at it.
>
> I'd like to ask you to look at ffmpeg (missed core2 vectorization
> opportunities), polyhedron (PR34501, like, duh! :-), and Apache
> benchmark (-mtune=core2 results in lower scores).
>
> You could check overall effects on an openly available benchmark suite
> such as http://www.phoronix-test-suite.com/

Thank you for the pointers!

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