Messages in this thread | | | Date | Wed, 12 Dec 2007 01:16:06 +0100 | Subject | Re: [RFT] Port 0x80 I/O speed | From | Rene Herman <> |
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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. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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