Interpreting callgrind data

问题:

I need a dynamic call graph for my app. I run it with callgrind tool (valgrind suite) and got callgrind.out.xxxxx file. Now, I want to make a graphical representation of this data. KCacheGrind doesn't help me much because it draws a limited part of the graph (draws ~50 functions instead of ~1500 profiled and I don't know how to fix that). How can I get a graph image where all of the functions will be drawn?

回答1:

Ok, I've found the way. The generated callgrind.out file you can convert to dot file using gprof2dot (yes, this tool can parse callgrind files as well). And then you can get the graph image using dot -T<type> dotfile.dot -o graphfile.<type>

回答2:

Using the following command to generate graph.png using gprof2dot

$ ./gprof2dot.py --format=callgrind --output=out.dot /path/to/callgrind.out
$ dot -Tpng out.dot -o graph.png