io-display behavior Coral chipset

Hi,

I have a little question about the io display behavior with OpenGL ES
I have a sample application drawing 2 cubes and a camera.
My process ran in 3ms next when I call eglSwapBuffer it sends a message to io-display and this one take 30ms to draw the scene.

I think this is too much for this very simple scene.
If you have any idea on why this kind of behavior …

for information my embedded platform is a jade from fujitsu.

Thank you very much.

Bhaal22.