Hi again.
I had wrong understanding of DispSync role.
After removing define PRESENT_TIME_OFFSET_FROM_VSYNC_NS I got the same CPU
time as without display fences.
During video playback hardware vsync enables 10-30 times per minute.
Is it normal value?
Also I am interesting how to calculate values
Hi Andy.
I've checked power management component. It doesn't changes for a long time
and works normal.
> Without it, on every hardware VSYNC the system wake up SurfaceFlinger and
> wakes up all apps. With it, you still do that, but instead of it all
> happening at once it gets distributed.
Hi Andy.
Thank you for your answer.
I understood that I shouldn't disable DispSync.
>
>
> It calls a few trig functions every once in a while. That shouldn't be "a
> lot".
>
It calls:
1. After every hardware vsync - 60 times per second.
2. After every displayed frame - for 30fps video it's 30
Hello community.
I am porting Android 4.4 to OMAP4 platform.
It was discovered that Android 4.4 has bigger power consumption that
Android 4.3.
After some investigation I found out that DispSync model does a lot of
calculation on CPU.
For example, in case of videoplayback I got next resul
