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Linux/PROCESSOR-SDK-AM57X: GPU and CPU load while running Qt5 demos

Part Number: PROCESSOR-SDK-AM57X

Tool/software: Linux

On the SD card that shipped with my AM572x EVM board, I found a bunch of QT demo apps accessible via the Matrix GUI.

Upon running QT demos, the CPU load is ~90% while the GPU usage is <15% (according to PVRScope).

Is this normal..? I expected a lot less CPU usage. The KMSCube app barely uses CPU as a reference.