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Lo,
With C-code and a C-compiler, the compiler generates code to store and restore CPU and FPU registers for function calls.
I am not an OS expert, but I would think that for an OS switching between tasks, this may need to be done using additional function calls. The time it takes to do so would depend on how many registers need to be saved/restored.
Regards,
Abhishek
Hello Abhishek,
thanks for your reply!
Do you know how long a task switch takes?
Or do you know how many assembler instructions make up a function preamble?
Regards,
Lo
Lo,
there is no generic answer to this question.
The number of cycles needed for a task switch depends on what a task switch encompasses in your application. (e.g. whether MPU is being reconfigured for that particular task, whether floating point is being used, ...). It could be from tens of cycles to hundreds of cycles depending on the scope.
Regards,
Abhishek