When I was investigating the vsync provider on chromebook (chell), I found we are continue calling SwapBuffers for the login screen when screen is off (due to no user input for a while). I didn't test chrome after login, but I think it may have the same issue. For better battery performance, should we stop doing it?


See below attached patch which I used for the test.

When the screen is off, methods GpuBrowserCompositorOutputSurface::SwapBuffers(), GpuBrowserCompositorOutputSurface::OnGpuSwapBuffersCompleted() and DrmVSyncProvider::GetVSyncParameters() are being called continuously.
Method GpuBrowserCompositorOutputSurface::OnVSyncParametersUpdated() is called at all, probably it is because the vsync signal is disabled.
 

Deleted: vsync.patch 3.3 KB

vsync.patch 3.3 KB Download