Re: [Qemu-discuss] what's the difference between qemu-system-i386 and qemu-system_x86_64

[Willy Lambert]

I re added the mailing list in cc which I forgot in previous mail

If you don't care about the hardware simulated in qemu then choose x86_64.

You will choose i386 if you want to have something that is
representative of an i386 real target to minimize integration bad
surprises or maybe (i'm not sure about that) if your host is i386 and
you want some performance accelerations which requires host and guest
arch to be the same.

2013/1/14 lei yang <address@hidden>:
> On Mon, Jan 14, 2013 at 6:38 PM, Willy Lambert <address@hidden> wrote:
>> When you use qemu-system-XXX, the *virtualised* arch is XXX.
>>
>> So if you want to emulate a x86_64 arch use qemu-system-x86_64 (and
>> you can put a 32b or 64b system on it), if you want a i386 arch use
>> qemu-system-i386. John Floren has already anwered to that, what is not
>> clear in this ?
>>
>
> qemu-system-x86_64 can emulate both 32 (and 64), why we need qemu-system-i386?
> in another word, qemu-system-i386 can do what which qemu-system-x86_64 can't 
> do?
>
> Lei
>
>
>
>> 2013/1/14 lei yang <address@hidden>:
>>> So I would like to ask : when use qemu-system-i386 and when use
>>> qemu-system-x86_64?
>>>
>>> Lei
>>>
>>>
>>>
>>> On Mon, Jan 14, 2013 at 2:18 AM, Tony Su <address@hidden> wrote:
>>>> Is the nature of x64, the architecture is an extension of the original x86
>>>> instructionset. But, among other things the x386 lacked were cpu graphics
>>>> extensions.
>>>>
>>>> So, the x386 environment is different.
>>>>
>>>> TSU
>>>>
>>>> On Jan 13, 2013 5:41 AM, "lei yang" <address@hidden> wrote:
>>>>>
>>>>> On Sat, Jan 12, 2013 at 7:25 PM, John Floren <address@hidden> wrote:
>>>>> > The first emulates a 32-bit i386, the second emulates a 64-bit x86-64.
>>>>> > As
>>>>> > per the filenames.
>>>>> >
>>>>>
>>>>> But on my ubuntu(32bit), it still can use qemu-system-x86_64 emulate
>>>>> for 32 bit guest
>>>>>
>>>>> So I think qemu-syste-i386 is redundant
>>>>>
>>>>> Lei
>>>>>
>>>>>
>>>>> > On Jan 12, 2013 7:22 PM, "lei yang" <address@hidden> wrote:
>>>>> >>
>>>>> >> Hi experts.
>>>>> >>
>>>>> >> As the title
>>>>> >>
>>>>> >> Lei
>>>>> >>
>>>>> >
>>>>>
>>>>
>>>