CPU and Task Load Analysis using CCS (RTOS/SYSBIOS instrumentation)

Nikhilesh Saggere

Intellectual 480 points

Hi,

I have extracted the CPU and Task load %.

Here is the procedure to extract and interpret the data:

Step1:

Build the code by enabling UIA instrumentation, as shown below:
TI-RTOS->Products->UIA->LoggingSetup - UIA Logging Configuration: Enable CPU Load and Task Load

Step 2:

Flash the code built with the above mentioned options onto the microcontroller.

Step 3:

Enable execution Analysis (CPU and Load) by going into Tools menu.
Tools->Execution Analysis->Start/Run

Step4

Initiate the free run for a while and then suspend the execution/debugger
We can see the following graph depicting CPU and Task Load % (no need to insert the breakpoints, suspending the execution is enough to capture the details)

Every time we resume and suspend the execution the graph gets updated with recent/new data

Please let me know the procedure followed is right and the data aligns with my interpretation.

Occasionally i observe the warning called, x gap in records missed loading the data, please let me know if there is any action required for this.

Thanks,

-Nikhilesh

over 10 years ago

0 janet over 10 years ago

TI__Mastermind 22760 points

Hi Nikhilesh,

Your procedure is correct. When you halt the target in CCS, the Log data is uploaded from the target and the execution graph is updated. The Log buffer is circular, so if you halt the target, then run for awhile, the buffer may fill up and its oldest data will be newer than what was last displayed in the execution graph. That is why you will see gaps. You can increase the Log buffer size (LoggingSetup.sysbiosLoggerSize = ... for execution graph data), or halt the target more frequently to reduce the gaps.

Best regards,

Janet

0 Nikhilesh Saggere over 10 years ago in reply to janet

Intellectual 480 points

Thank you Janet!

0 Nikhilesh Saggere over 9 years ago in reply to Nikhilesh Saggere

Intellectual 480 points

Hi,

I have 2 questions from the below task load graph/CSV:

1) What is the meaning for the task:tcpHandler() which is showing "0", does that mean that this task is utilizing the CPU for "0" seconds?

2) What is the "CPU" string that is being shown, is it different from the "CPU load" that can be taken separately or are they same?

Thanks,

-Nikhilesh

0 janet over 9 years ago in reply to Nikhilesh Saggere

TI__Mastermind 22760 points

Hi Nikhilesh,
It looks like the tcpHandler() task did not run in the load update window (default window is .5 secs), or it ran for so little time that its load was truncated to 0. These numbers in the right hand column are percent. The "CPU" refers to overall CPU load.
Best regards,
Janet

0 Nikhilesh Saggere over 9 years ago in reply to janet

Intellectual 480 points

Thank you Janet!

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CPU and Task Load Analysis using CCS (RTOS/SYSBIOS instrumentation)