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This way works for me,
add launch-prefix="valgrind --tool=callgrind --callgrind-out-file=/home/project/test.log"
in your node as a attribute.
Then run your program and a log file will be generated.
Then start kcachegrind test.log
, you will see all the cool stuff what you have coded :D
To install kcachegrind
sudo apt-get install -y kcachegrind