MATLAB: Multi-threading with Simulink

code generationEmbedded Codermulti-threadingraspberry pisimulinksimulink codersimulink support package for raspberry pi

I have a Simulink model which was successfully builded and deployed to the Raspberry Pi 3 Model B+. While it is running the CPU usage monitor displays 25 percent CPU usage and the application is relatively slow. I think that this behavior originates from the using of only one kernel, although four cores are available.
Is it possible to configure Simulink / Simulink Coder for multi-threading to accelerate my application? Or is there any other solution for it?
Thank you in advance for your answer.