Stupid Projects does some benchmarking the STM32MP1 IPC between the MCU and CPU.
The MCU is an STM32 ARM Cortex-M4 core (CM4) running at 209MHz and the application CPU is a dual Cortex-A7 (CA7) running at 650MHz. Well, yes, this is a fast CM4 and a slow CA7. As I’ve said those two can share almost all the same peripherals and the OpenAMP API is used as an IPC to exchange data between those two.
Check out the article here.
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