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Extreme CPU usage when ploting using rxplot and rxbag tools

asked 2013-02-20 09:07:01 -0600

dmeltz
192 ●16 ●21 ●25

updated 2014-01-28 17:15:20 -0600

ngrennan
1 ●1 ●1

Hello all.

For some reason when I plot data using rxgraph or rxbag tools, the CPU usage explodes.

For example : I trying to plot some fields of a topic that consist of 20 numerical fields and published on rate of 10Hz (not a high rate for my understanding). when I attempt to plot at the same time 10 different graphs, the CPU usage jumps to over 90%. The CPU usage not really improves even if I record and play a bag file.

Can anyone offer an explanation for this phenomenon ? Or suggest a way to deal with this problem ?

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answered 2013-02-20 10:20:27 -0600

fergs

13902 ●59 ●157 ●196 http://www.robotandchisel.com

rxgraph is pretty old and has degraded over time. I would suggest checking out rqt if you are using ROS Fuerte or Groovy. RQT is much better maintained at this point in time.

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Asked: 2013-02-20 09:07:01 -0600

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Last updated: Feb 20 '13

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