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SimpleProject (Simple OpenGL ES 2.0 Example) expected performance?

Min Kyu Jeong
Note: This was originally posted on 5th September 2012 at http://forums.arm.com

Hi,

I am running the SimpleProject sample code posted here (http://www.malidevel...-code/index.php), on a Origen development board (samsung Exynos 4210) that has MALI400. It's a linux kernel version 2.6.35-7. The driver version is r3p0. Also using DS-5 CE Streamline.

The program simply draws a triangle repeatedly as fast as it can, but the performance is rather low.

I am seeing 5 FPS (roughtly 200ms per frame) when I capture Steramline data. Without the streamline, it is 189ms per frame. (time interval between the main loop iteration). Most of the time (over 99%) is spent in eglSwapBuffers() function.



The timeline view doesn't really tell me much. It has very low GPU Vertex/Fragment Activity, which perfectly makes sense. But why wouldn't it go faster? Is this the SimpleProject sample application? or would it be somewhere else in the stack?

Thanks,

Min
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  • Note: This was originally posted on 5th September 2012 at http://forums.arm.com

    Hi mkjeong,

    Double buffering is enabled in drivers/media/video/samsung/tvout/s5p_tvout_fb.c, in the function s5p_tvout_fb_init_fbinfo. Make sure the line "fix->ypanstep" is set to 1 and not 0. Also it is just past 6pm here so you might not receive any further reply until tomorrow morning UK time.

    Also, I have private messaged you, in case you didn't spot it. If you could reply to that then I can escalate this issue.

    Thanks
    Chris

    How do I check I am using double buffering? I don't remember me configuring that knob during the bringup. Is it in the kernel? kernel driver? user level driver? or application?

    Thanks for your help.

    Min


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  • Note: This was originally posted on 5th September 2012 at http://forums.arm.com

    Hi mkjeong,

    Double buffering is enabled in drivers/media/video/samsung/tvout/s5p_tvout_fb.c, in the function s5p_tvout_fb_init_fbinfo. Make sure the line "fix->ypanstep" is set to 1 and not 0. Also it is just past 6pm here so you might not receive any further reply until tomorrow morning UK time.

    Also, I have private messaged you, in case you didn't spot it. If you could reply to that then I can escalate this issue.

    Thanks
    Chris

    How do I check I am using double buffering? I don't remember me configuring that knob during the bringup. Is it in the kernel? kernel driver? user level driver? or application?

    Thanks for your help.

    Min


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