Quote:
Originally Posted by Greg McKaskle
The next thing a LV team might want to do is to open Tools>>Real Time>>System Manager. This is basically the task manager for the LV cRIO. To get an accurate reading of CPU usage, click to the VI tab and turn off the Track VI States. Then click back to the first tab and Start. The bottom chart shows CPU usage and you should help understand what the cRIO is having to perform. Using this, you can run different modes, turn off different features, even comment out some code, and use the task manager to learn what the CPU cost is of different features.
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Does anyone have any benchmark data for what a "normal" processor load is? I've found that running the default code puts the cRIO CPU load at about 92%. I've found that running our "full featured" code (ten motors, four encoders, two analog inputs, lots of global variable use) the processor load is about 95%. Even shutting down most of the VIs doesn't seem to have a significant impact on processor load. With that level of insensitivity, I don't see a whole lot to be gained by using the System Manager as an optimization tool. Are there a lot of housekeeping tasks going on in the background that drive the CPU load so high?