Execution Profiler

Profile execution time of functions using either DWT Timer, GPIO or Timer measurement modes

Since R2025a

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Description

The Execution Profile block enables you to profile the execution time of functions using either Data Watchpoint Trace (DWT) Timer, GPIO, or Timer measurement modes.

• DWT Timer: Measure timing of tasks by recording the cycle count at the start and end of a function.

• GPIO: Set and clear GPIO pins before and after the execution of downstream function-call subsystems.

• Timer: Measure execution time of events by calculating the duration between pre-execution and post-execution timer counts.

These techniques enable you to accurately profile and optimize the performance of your code running on STM32 processors.

Examples

Profile STM32 Algorithms in Real-Time

Use the Execution Profiler block to perform real-time execution profiling of algorithms with the Embedded Coder® Support Package for STMicroelectronics® STM32 Processors. The example demonstrates three profiling methods:

• Open Live Script

Ports

Output

f() — Function call port

scalar

Connect a function call subsystem to this port. When the subsystem executes, it is profiled using the selected measurement technique.

cnt — Count port

scalar

Displays the execution time in number of cycles.

Dependencies

To enable this port, set the Measurement mode parameter to either Data Watchpoint Trace (DWT) Timer or Timer.

Data Types: uint32

Parameters

Measurement mode — Select execution profiling technique

Data Watchpoint Trace (DWT) Timer (default) | Digital Port Write (GPIO) | Timer

Select the measurement techniques to profile function-call subsystem on the target hardware.

• Data Watchpoint Trace (DWT) Timer: Measure and analyze the execution times of start-to-end downstream function-call subsystems.

• Digital Port Write (GPIO): Utilize GPIO pins to set and clear signals before and after executing downstream function-call subsystems.

• Timer: Use timers to measure execution time by calculating the duration between pre-execution and post-execution timer counts. When you select Timer measurement, Timer 2 is used for timer based profiling.

GPIO port name — Specify GPIO port name

GPIOC (default) | GPIOA | GPIOB | …

Specify the GPIO port name for the block.

Dependencies

To enable this parameter, set the Measurement mode parameter to Digital Port Write (GPIO).

GPIO pin number — Specify GPIO pin number

0 (default)

Specify the GPIO pin number for the block.

Dependencies

To enable this parameter, set the Measurement mode parameter to Digital Port Write (GPIO).

Timer module — Select timer module

TIM2 (default) | TIM1 | TIM3 | ...

Select the timer module for the block.

Dependencies

To enable this parameter, set the Measurement mode parameter to Timer.

Sample time — Sample time at which block reads data from execution profiler

1 (default)

Sample time at which the Execution Profiler blocks triggers downstream function-call subsystem.

Use this parameter to specify the time interval between 2 function-call triggers. The count data is also updated at the mentioned sample time. To inherit sample time, set this parameter to -1.

Version History

Introduced in R2025a