MCU-PLUS-SDK-AM263PX: Profiling ISR with (ClockP, ticks)

Hi Scott,

Please refer to Benchmarking your Application in am26x academy or you could use the CCS In-built profiling-

2. CCS base Profiling

The profile clock can be used to count clock cycles

Step 1: Enable the clock by going to menu Run -> Clock -> Enable

The clock will be displayed in the CCS status bar at the bottom right

Step 2: Double-click in the left selection margin of the editor beside line 67 in i2c_led_blink.c to set a breakpoint

Step 3: Click the Resume button.

The program will halt at the breakpoint and Clock will show the number of cycles to execute from the beginning of main to current breakpoint.

Step 4: Double-click on the Clock icon to reset the count to 0

Step 5: Click the Resume button again.

The Clock will show the number of cycles to execute from the previous breakpoint to the current breakpoint (~25M cycles between each LED blink)

Step 6: Click the Resume button several times and note that the clock cycles increment by about the same number each time

Step 7: Disable the clock

Diable the clock by going to menu Run -> Clock -> Disable

Step 8: Remove the breakpoint

Remove the breakpoint by selecting the breakpoint in the Breakpoints view and clicking the Remove button.

Please let me know if any of these ways would suffice for your Profiling purpose.

Regards,
Akshit

Hi Akshit,

Thanks for the information. This is very helpful. I will be using this for profiling code as I develop. 

However, I also am looking for a programmatic way test for 'in-filed', and regression test.

I want to:

• call a high resolution (microsecond preferable) 'get start tick'.
• execute the code being profiled.
• call a high resolution (microsecond preferable) 'get end tick'.
• compute statistics on the difference in  'end tick' and 'start tick'.

This allows for finding inadvertent issues affecting timing over the life-cycle of the project.

I want this 'get tick' call to be ISR safe so it can used this scheme to profile ISRs.

Regards,

Tollman