Re: [Qemu-devel] Plan for using softmmu with linux-user

[Chen Gang]

On 2015年08月19日 16:01, gchen gchen wrote:
> On 2015年08月15日 04:45, Chen Gang wrote:
>> On 8/14/15 22:44, Richard Henderson wrote:
>>> On 08/14/2015 02:37 AM, gchen gchen wrote:
>>>>  - If I implement SW64 tcg backend, I guess, I cann't get help from qemu
>>>>    upstream: I don't think SW64 is valuable enough for upstream (either
>>>>    I am not sure that I can implment Alpha tcg backend in working time).
>>>
>>> It'll need some updating to apply to master, but I started an alpha backend 
>>> a
>>> couple of years ago.  It looks like it was last rebased in May 2014.
>>>
>>>   git://github.com/rth7680/qemu.git tcg-alpha-2
>>>

Really thank you very much again!!

I have implemented sw_64 tcg back end, its performance is much better
than tci (10 times faster for testing i386 bash). I guess at present,
our qemu performance should be enough for my current using. :-)

And next, I shall try to merge alpha related code to the latest qemu,
and send patches for it. Hope it is useful for our qemu (since no any
additional reply for it, I guess I should try to send patches for it).


Thanks.

>>
>
> After get sw_64 pc, it is much slower than I guess (it is much slower
> than my intel x86_64 laptop which was made in 2007-2008). So I have to
> use tcg backend instead of tci.
>
> Will qemu upstream accept alpha tcg backend to master tree? If possible
> I can do it in my working time (after simply trying, I am sure, alpha
> tcg backend can not work if only simply merge and let it pass building).
>
> By the way, for me, I have to process alpha/sw_64 tcg backend firstly,
> then process softmmu + linux-user.
>
>
> Welcome any ideas, suggestions, and completions.
>
> Thanks.
>
>> Thank you very much, I shall clone it. I guess, it will save my much
>> time resources.
>>
>> If possible, it will be better to merge the alpha tcg backend to qemu
>> master main branch (at least for me, it is useful).
>> :-)
>>
>
> --
> Chen Gang
>
> Open, share, and attitude like air, water, and life which God blessed
>
>

--
Chen Gang

Open, share, and attitude like air, water, and life which God blessed