[android-developers] Re: Bizarre OpenGL performance on Samsung Galaxy.

On tracing in eclipse, I can see that the length of identical calls to
glDrawArrays varies wildly - this appears to be where the variability
comes in. I seem also to be able to get the phone in a state where all
of these calls become unusually lengthened.

On Aug 22, 5:33 am, Mark Ayers <markthe...@gmail.com> wrote:
> The Transformer probably just has the power to muscle through whatever is
> causing your problem.
> On Aug 21, 2011 3:39 AM, "calderwa" <alancalderwoo...@googlemail.com> wrote:
>
>
>
> > No-one experienced this or have any ideas?
>
> > On Aug 18, 8:54 pm, calderwa <alancalderwoo...@googlemail.com> wrote:
> >> Yeah, no problem:
>
> >> [ro.build.fingerprint]: [samsung/GT-I9000/GT-I9000:2.3.3/GINGERBREAD/
> >> XXJVK:user/release-keys]
>
> >> I use purely Java, and a standard GLSurfaceView. The exact same
> >> behaviour is seen with the nVidia test programs, which use Java merely
> >> to invoke standard OpenGL ES 2.0 code in a C++ library.
>
> >> Cheers,
> >> Alan
>
> >> On Aug 17, 10:05 am, "Dan Raaka" <danra...@gmail.com> wrote:
>
> >> > Can you tell me the fingerprint of the device you are seeing this
> behavior ?
> >> > $ adb shell getprop | grep fingerprint
>
> >> > -Dan
>
> >> > -----Original Message-----
> >> > From: android-developers@googlegroups.com
>
> >> > [mailto:android-developers@googlegroups.com] On Behalf Of calderwa
> >> > Sent: Tuesday, August 16, 2011 3:30 PM
> >> > To: Android Developers
> >> > Subject: [android-developers]BizarreOpenGL performance on Samsung
> Galaxy.
>
> >> > HI. I have been writing some OpenGL ES 2.0 code, running on both my
> Galaxy S
> >> > and Asus transformer. The Galaxy exhibits a truly weird behaviour. When
> the
> >> > phone is connected to the PC via USB, or if it is connceted wirelessly
> using
> >> > the nVidia SGXPerfServer I get smooth 32 fps performance. If the phone
> is
> >> > disconnected it is extremely jerky and approximately half this rate.
> There
> >> > appears to be no appreciable garbage collection that might explain the
> >> > effect. It appears not to be a configuration issue, as the behaviour
> >> > switched between good and bad when the app is running, simply by
> plugging in
> >> > and out the USB cable.
> >> > The Asus transformer just runs the same irrespective of connection
> status.
> >> > Any ideas? I have searched long and hard on the web. I have found
> multiple
> >> > reports of poor openGL performance on Galaxy, but none related to
> connection
> >> > status.
> >> > All help gratefully received.
>
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