QNN's Hexagon stub loads libcdsprpc.so, a vendor library, and from API 31
an app's linker namespace refuses a vendor library its manifest does not
name. QNN then fails to create its device - QNN_DEVICE_ERROR_INVALID_CONFIG,
before it reaches the DSP - and every model ran on the CPU on 0.22.0: AI
denoise took 30-131 s a photograph on the tablet.
The same engine code ran on the HTP from adb's shell, whose namespace has
no such rule, which is what hid it. With the declaration the app's probe
chose the Hexagon on the tablet and compiled every model for it. Not
required, so a device without the library still installs and runs on the
CPU. A test holds the line in the manifest.
dtourolle
a116325991