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Altera_Forum's avatar
Altera_Forum
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21 years ago

I need to know NIOS2 CPU utilization

hello experts, My problem is, that I would like to measure NIOS2 CPU utilization (CPU load) in uClinux under different applications running. Maybe, there already exist some application in uClin...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

hi Scott,

thanks, now it works well - I have forgotten to include line which saves old CPU times, from /proc/stat, so it produced averaged values from the time when the application started http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/smile.gif

maybe, if you are not disgusted with my small problems, you can give me advice how to get exact 20ms timing in uClinux running in NIOS2. I tried classic timer using interrupt with SIGVTALRM signal, but the time, which I measured did not correspond to the time period, which was set before timer started and even more the timer delay is not equivalent, I found this unpleasant feature, when tried to make my own CPU usage monitoring application - It looks like the timer has very low interrupt priority... So it was the "lucky" reason to get back to your advices and search for error in my code.. But the unlucky issue is, that there is no chance to get precise continuous timing or yes?

with regards jan