how to search mali gpgpu simualtor and is it exists?

Using boards is going to be the best way to go. They are cheap and easy to use. There is no simulation technology that runs CPUs, interconnect, memory controllers, and Mali GPUs at a speed which is fast enough to measure performance details for a full system. The techniques which are commonly used for pre-silicon performance analysis cost far more than a board.

I would also recommend to read about options for trace and performance analysis using the Mali Graphics Debugger and Streamline.

Using boards is going to be the best way to go. They are cheap and easy to use. There is no simulation technology that runs CPUs, interconnect, memory controllers, and Mali GPUs at a speed which is fast enough to measure performance details for a full system. The techniques which are commonly used for pre-silicon performance analysis cost far more than a board.

I would also recommend to read about options for trace and performance analysis using the Mali Graphics Debugger and Streamline.