Re: [RFT] Port 0x80 I/O speed

[Rene Herman]

On 12-12-07 01:09, Alejandro Riveira Fernández wrote:

> > >  On my AMD 3800 X2 (2000MHz) ULi M1697 2.6.24-rc5 i get:
> > >
> > >  cycles: out 1844674407370808, in 1844674407369087
> > >  
> > > It is not constant but variations are not significant afaics
> > Eh, oh, I guess you need to compile as a 32-bit binary...
>  
>  I tried without -O2 as Nigel Cunningham...
>
>  cycles: out 1562, in 865
>  cycles: out 1562, in 866
>  cycles: out 1555, in 858
>  cycles: out 1562, in 866
>  
>  With -m32 -O2
>  cycles: out 1566, in 876
>  cycles: out 1555, in 865
>  cycles: out 1594, in 931
>  cycles: out 1559, in 874

Great, thanks much for reporting. Sort of interesting in itself that without 
-O2 you do still get correct results on 64-bit but for some other time.

You're the first one to go significantly below 1 us it seems.

Rene.
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