Quoting Andy Green <andy@xxxxxxxxxxx>: > On 12/30/10 21:37, Somebody in the thread at some point said: >> Quoting Andy Green <andy@xxxxxxxxxxx>: > >>> 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. _______________________________________________ arm mailing list arm@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/arm
