FreeRTOS Interrupt Profiling Example

Table of Contents

• Introduction
• Supported Combinations
• Steps to Run the Example
• See Also
• Sample Output

Introduction

This example demonstrates profiling of interrupts. Two tasks are created, three interrupts of different priority levels are configured. The interrupts are triggered to cause nesting & the behaviour of interrupts is verified against a reference. If the behaviour of interrupts is as expected, the total ISR load and CPU load is displayed and the example is marked as passed.

Note

Make sure "#define INTR_PROF" is present in "/source/drivers/hw_include/am64x_am243x/soc_config.h", to enable capturing of interrupt trace. Else the displayed LOAD values will be 0.

Supported Combinations

Parameter	Value
CPU + OS	r5fss0-0 freertos
Toolchain	ti-arm-clang
Board	am64x-evm, am64x-sk
Example folder	examples/kernel/freertos/interrupt_profiling

Steps to Run the Example

• When the INTR_PROF macro is modified, the library needs to be re-built. This can be done only using makefiles. (see Using SDK with Makefiles).
• When using CCS projects to build, import the CCS project for the required combination and build it using the CCS project menu (see Using SDK with CCS Projects).
• When using makefiles to build, note the required combination and build using make command (see Using SDK with Makefiles)
• Launch a CCS debug session and run the executable, see CCS Launch, Load and Run

See Also

FreeRTOS

Sample Output

Shown below is a sample output when the application is run,

[FreeRTOS] profiling ... start !!!
[FreeRTOS] profiling ... done !!!
[FreeRTOS] profiling ... completed !!!
 
LOAD: ISR  =  0. 0 %
LOAD: CPU =  0.60 %
LOAD: ping = 0.27 %
LOAD: pong = 0.10 %
 
All tests have passed!!