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SPRAA56
DSP/BIOS Real-Time Analysis (RTA) and Debugging Applied to a Video Application 21
– Statistics View. Shows the values for STS objects used by the UTL benchmarking APIs
and some TSK-specific STS objects. You may want to change the units of the STS
objects to milliseconds. To do this, right-click on the Statistics View and choose
Properties. You can change the units and disable/enable STS objects individually. (The
IDL_busyObj is used by the CPU Load Graph, you can disable its statistics and the
TSK_idle statistics.)
– Message Log. Shows output from the LOG_printf and UTL_logDebug APIs. Most
benchmarking techniques in this example send output to the Message Log, so this may
be the most important RTA window for debugging and benchmarking. Because of the
large amount of data sent to this window, you may want to configure the window to
automatically move to the end of the log to display the most recent data. To do this,
right-click on the Message Log and choose “Automatically scroll to end of buffer”. You
can also send log data to a file on the PC. To do this, right-click on the Message Log
and select Properties. Then enable and select the file.
– CPU Load Graph. Shows the percentage utilization of the DSP core in non-idle tasks.
– RTA Control Panel. You may want to lower the update (polling) rate of the real-time
windows; this makes the instrumentation less intrusive. Right-click on the RTA control
panel and choose Properties. You can change the update rates of various RTA
windows, starting from a default rate of 1 second. A rate of 3-5 seconds is
recommended.
– Execution Graph. (optional) Displays the execution flow of TSKs in the system. This
graph can indicate whether TSKs are executing in the correct sequence and not stalling.
In an application that is working correctly, the Execution Graph may not be useful. In an
application with a run-time error, this graph can help indicate whether the correct
execution sequence occurs.
Hint: To better organize a large number of debugging windows on the screen, you may want
to float each window in the CCStudio workspace. To do this, right-click on a window, then
select “Float in Main Window”.
Note: With the current revision of the 'C64x CPU, real-time analysis can “freeze” and stop
updating in real-time. If you experience this problem, see the SDSsq27324 problem report
and workaround.
After opening all these windows, CCStudio may look like Figure 6.