On Sat, Jul 26, 2014 at 03:02:16AM +0000, Caoqiuhong wrote: > Hi Lennart, > > I just want explain detail for you question, and some findings. > > >>Which CPU model are you using? Does it support using all 8 cores at once, > >>or does it switch between the A15 and A7 clusters? > Not run A7 or A15 cluster separately, but run A7 and A15 cluster at once. > truly 8cores, not 4@A7, or 4@A15 independently. > > Some test I have done. > 2@A7 and 2@A15 is ok at once, this issue just happen if the core count more > than 4. > > In Android source code , I found pixman located in external/pixman, and > static library cpufeatures will be linked in it's makefile. > cpufeature is an android ndk module, it will open debug fs node in linux, > such as follow, > "/sys/devices/system/cpu/present" > "/sys/devices/system/cpu/possible" > > if cpu present return value equal or less than 4, no such issue. > if cpu present return value greater than 4, issue will happen.
Well my arndale-octa (Exynos 5420) still only runs 4 A15s and no A7s, and apparently samsung doesn't give a shit about fixing it (apparently the 5422 and 5800 work fine), and everyone else that does can't get access to the right information because of samsung. So I can't try it out. Did you try the current version (0.32 I believe). After all it could be something that was already fixed. -- Len Sorensen _______________________________________________ Pixman mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/pixman
