[fedora-arm] F14 qemu arm default board

[omalleys at msu.edu]

Quoting Andy Green <andy at warmcat.com>:

> On 12/30/10 21:37, Somebody in the thread at some point said:
>> Quoting Andy Green <andy at warmcat.com>:
>
>>> The quickest solution is uplevel your main rootfs to the f12 tarball
>>> and do it from there with an rpm that understands xz already.
>>
>> The fastest solution was to run the F12 vm since it took about a minute
>> to install and get the script running.
>
> Well, it being a VM has nothing to do with it: you ran an F12 main  
> rootfs as suggested and so avoided the xz problem.
>
>>>> If you can get performance similar or faster to actual hardware, there
>>>> will be more interest. If it is pretty easy to set up a VM and add it
>>>
>>> Last time I looked at ARM qemu on quite a beefy Intel box I saw the
>>> same kind of 10% of ARM11 performance that Chris mentioned. Qmeu like
>>> that is just not useful for build duty, and real ARMs are getting
>>> faster much quicker than x86 iron is pretending to be an ARM so it
>>> never will be useful either.
>>
>> Are you saying you tried the ARM11 kernel with qemu F12 or you just
>> tried the versatile kernel with the F12 qemu image off the wiki and it
>> gave 10% ARM11 performance?
>
> I tried to get started with qemu a couple of years ago and have  
> forgotten what I ran, but as I recall it was a precooked image.   
> Even booting the kernel was slow.  I tried to compile an app using  
> gcc so the emulator was having to do "real work".
>
> At that time the alternative it was being compared to was a real  
> 532MHz ARM11 with 128MB of DDR, it was able to compile "much" faster  
> than the qemu box.  This year there are Cortex A9 ARM boxes  
> available are much faster than that and next year there'll be Cortex  
> A15 ~2GHz quad core natively.  Qemu and intel boxes aren't getting  
> faster at that kind of rate any more.

No there is a huge performance difference from what I have seen.  
However I did get some boost by using a newer kernel, and by switching  
the boards.

I was just trying to determine whether or not I should bother try to  
test ARM11xx for qemu compilation speed or whether I should try  
something else.