Re: [PATCH V2] [x86]: Compiler Option Os is better on latest x86

[Ling Ma]

Hi Ingo

Thanks for your correcting.
Because thinking of  most of 32bit CPU belong to low-end CPUs(smaller
cache), they should more  emphasize  i-cache miss, I chose Os for
them.
I will test it and send out result ASAP.

Regards
Ling

2013/1/27, Ingo Molnar <mingo@xxxxxxxxxx>:
>
> * ling.ma.program@xxxxxxxxx <ling.ma.program@xxxxxxxxx> wrote:
>
>> In this version we also append CONFIG_CC_OPTIMIZE_FOR_SIZE for i386.
>
> Were those measurements done on i386 as well? I'd be content
> with keeping the current minimal - and mostly documentary -
> patch that only does this on 64-bit. I just wanted to record the
> current benchmark numbers mostly.
>
> Also see the discussion with Linus - this is by no far an
> unconditionally good option and we'll probably have to wait for
> more GCC action (-Ok or so) before being able to enable size
> optimizations everywhere without unacceptable trade-offs.
>
> Thanks,
>
> 	Ingo
>
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