I think we are blocking on the buffer swap in the compositor so those times include the time to wait for vsync. Andreas
Sent from Mobile. On Feb 4, 2013, at 16:51, Chiajung Hung <[email protected]> wrote: > Hi Wei Chen, > > I think the CPU cost on Compositor is not easy to analyse. If you really > concern that, I think you can file a bug with more information about your > platform and give some information about it. (for example, the screen > resolution, CPU clock and EGL extension set, etc.) > > And I think it is not a static scene if you are charging your battery or the > wifi icon on status bar change, or the clock on status bar ticks. Basically, > any small change on screen trigger composition. > > I think you just found the symptom, but the root analysis is far more > complicate that we can discuss on a bug and then see how we can make it > better :) > > Best Regards, > Chiajung > > ----- Original Message ----- > From: "Wei Chen" <[email protected]> > To: "mozilla dev b2g" <[email protected]> > Cc: [email protected] > Sent: Monday, February 4, 2013 6:35:07 PM > Subject: Re: [b2g] how to enable hardware compositor > > On Thursday, January 31, 2013 8:31:21 AM UTC+8, Chiajung Hung wrote: >> Hi Wei Chen, >> >> >> >> 1. The hardware composer *do not* help when you concern CPU usage, and >> >> basically *not always* introduce performance gain on Android if the > > > hi, Chiajung Hung > > I open the macro COMPOSITOR_PERFORMANCE_WARNING in CompositorParent it always > says > > Compositor: Composite took 43 ms. > Compositor: Composite took 127 ms. > Compositor: Composite took 79 ms. > Compositor: Composite took 55 ms. > Compositor: Composite took 64 ms. > Compositor: Composite took 67 ms. > Compositor: Composite took 49 ms. > Compositor: Composite took 68 ms. > _______________________________________________ > dev-b2g mailing list > [email protected] > https://lists.mozilla.org/listinfo/dev-b2g > _______________________________________________ > dev-b2g mailing list > [email protected] > https://lists.mozilla.org/listinfo/dev-b2g _______________________________________________ dev-b2g mailing list [email protected] https://lists.mozilla.org/listinfo/dev-b2g
