I wrote a very simple Android application(AndroidGLSurfaceViewActivity.apk).mainly use opengl use muti-thread to draw frame on the screen
I tried to run on the freescale platform ( i.mx6q , 1GB Ram , android 4.0.4 , hdmi 1080p output )
It can't run more than one hour will cause the system to crash. (Kernel panic or rcu_preempt_state detected stalls on CPUs/tasks).
but it can run all night on the Android Emulator and Samsung Galaxy Note 8.0
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We have also seen similar crashes on our product that is based on SabreSD iMX6Q jb4.2.2-1.1.0-ga release with 2GB of memory.
Kernel panics with a NULL pointer dereference or " rcu_preempt_state detected stalls".
I ran your tests on our boards and saw the kernel panic a couple of times. I also saw sometimes the app would freeze and I would have stop and start it again.
I also tried your test on a few of our SabreSd (Rev C1 and Rev C2) boards. I didn't see the same specific kernel panic or rcu stall yet,
but they did reboot a couple of times without any logs. The OOM killer seems to kick in pretty quickly too, maybe because SabreSd only has 1GB.
I am running a newer version of Android (and probably the kernel) than you. But regardless, your test does definitely reveals some issues on the iMX6.
from Chris1z
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when I upgrade our platform to android 4.2.2 .
it will reboot system and without any error logs in one hour.
i think seems to be a watchdog role because the kernel no response
Because I accidentally turned off the topic so i re-open a new , Someone from Freescale please comment.
PS : Android apk and program source code and detailed error messages, see attached file
Original Attachment has been moved to: rcu_preempt_state-detected-stalls-on-CPUstasks.txt.zip
Original Attachment has been moved to: AndroidGLSurfaceViewActivity.7z.zip
Original Attachment has been moved to: AndroidGLSurfaceViewActivity.apk.zip
Original Attachment has been moved to: Kernel-panic--not-syncing-Fatal-exception.txt.zip
