Questions about selective scheduler and PowerPC

[Jie Zhang]

On 10/23/2010 01:50 AM, Pat Haugen wrote:
> On 10/20/2010 7:48 PM, Jie Zhang wrote:
>>> Running CPU2006, with the hack removed I see about a 1% improvement in
>>> specint (10% in 456.hmmer, a couple others in the 3% range, -3%
>>> 401.bzip2) and a 1% degradation in specfp (mainly due to a 13%
>>> degradation in 435.gromacs). But 454.calculix also fails for me (output
>>> miscompare), so assume we're generating incorrect code for some reason
>>> with the hack removed.
>>>
>> Thanks for benchmarking! Since there is a bug in max_issue, issue_rate
>> is not really honored. Could you try this patch
>>
>> http://gcc.gnu.org/ml/gcc-patches/2010-10/msg01719.html
>>
>> with and without the hack?
>>
>
> With your patch applied I see pretty similar results as before, except
> for a couple additional specint benchmarks that degraded a couple
> percent with the hack removed.
>
Thanks for testing! Seems rs6000 port still has to keep that hack for now.

-- 
Jie Zhang
CodeSourcery