Which is the best choice, pae or x64?

[Rofail Qu]

2010/9/25 Christopher Chan <christopher.chan at bradbury.edu.hk>:
> Rofail Qu wrote:
>> Inter Core2 Duo E8400 CPU @ 3.00GHz
>
> I'd go for x64 because I am not sure how good the iommu unit on the
> E8400 is in 32-bit PAE mode. Without a iommu, PAE will incurred
> performance penalties due to having to use bounce bufferes.
I know E8400 has iommu support for implementation its x86
virtualization technology.
But how good is hard to say.
If there is no one surely answer. I think I can do some test to compare.

>
>
>>
>> 2010/9/25 Christopher Chan <christopher.chan at bradbury.edu.hk>:
>>> Rofail Qu wrote:
>>>> My PC is x86 arch and has 4GB of mem.
>>>> I tried,
>>>> $ cat /proc/cpuinfo |grep lm
>>>> flags         : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat
>>>> pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe constant_tsc
>>>> pebs bts pni dtes64 monitor ds_cpl cid xtpr lahf_lm
>>>> flags         : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat
>>>> pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe constant_tsc
>>>> pebs bts pni dtes64 monitor ds_cpl cid xtpr lahf_lm
>>>>
>>>> So, i think it support x64 as well.
>>>> The question is, which kernel should i choose? The pae or x64?
>>>> Which is the best choice? Why?
>>>> Thanks.
>>>>
>>> What cpu are you using?
>>>
>
>
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