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Unread 29-01-2012, 21:32
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Chris_Elston Chris_Elston is offline
Controls Engineer
AKA: chakorules
FRC #1501 (Team THRUST)
Team Role: Engineer
 
Join Date: Feb 2004
Rookie Year: 2001
Location: Huntington, Indiana
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Re: Worried about high CPU usage in CRIO

Quote:
Originally Posted by Joe Ross View Post
I wonder how much of this is now it's much easier to see the CPU% on the driver station, so now more people are noticing it.
You may have an excellent point there, except the watch dog errors have always been there. In the case where 100% CPU is seen, the watch dog error fill the driver station diagnostic window. If in the past, without the CPU chart, we would have seen the same watch dog errors fill the screen I assume due to high CPU usage, even though we could not see the CPU usage in year previous.

My logic is, if we did not see any watch dog errors in 2009, 2010, and 2011, then I assume maybe we did not have a MAX'ed out CPU Usage. This year, we see the CPU usage hit 100%, then we see the watch dog errors fill the screen, and teleop disables, and the robot shudders to a stop when we have too much loaded in the CRIO. (Which bty the way isn't much code at all... compared to the past robots. And if you wanna see the past robots, click the link at the bottom of the screen to the repository. The only time we used vision was 2009 and that robot was fine.

BTY, that's a great tool who ever designed this CPU, latency and charts, thanks for giving us the chart trends to see this information....who ever you are. Thank you.
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