publisher is faster than callback where is called [closed]

asked 2014-09-09 11:54:13 -0600

mark_vision gravatar image

Hi all, I'm trying to use Syncronizer class with a couple of subscribers. The two sources are published at 14 Hz and the output I publish inside the joined callback is 6 Hz, even if it's very lightweight and the two sources are very close in time (less than 10 nanoseconds). So I tried with just an ordinary callback, I listen to the input (at 14 Hz) and publish a string from inside the callback...and...surprise: I publish at 20 Hz!!! I'm faster than the source! How is it possible???

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Closed for the following reason Question does not follow our guidelines for questions. Please see: http://wiki.ros.org/Support for more details. by mark_vision
close date 2014-09-10 03:44:09.121697

Comments

can you post your code and 2 topicnames

bvbdort gravatar image bvbdort  ( 2014-09-09 12:33:34 -0600 )edit

I just realized that I was publishing in both the callbacks, so 6 + 14 = 20 Hz. We can close the question.

mark_vision gravatar image mark_vision  ( 2014-09-10 03:43:18 -0600 )edit