Using valgrind

Mac OS X

A valgrind analysis is performed using the valgrind tool. Here we show as example how the createfits executable in the C++ example folder is profiled. Please create a profiling directory in the GammaLib source tree, step into that directory and type:

$ mkdir profiling
$ cd profiling
$ valgrind --tool=callgrind -v --dump-every-bb=10000000 ../examples/cpp/.libs/createfits

Warning

You should run the valgrind tool in a dedicated repository since a large number of output files will be generated.

Note

To profile a C++ class you need to create a binary executable. Please make sure that you profile the binary executable and not a script that is eventually generated and wrapped around the binary executable.

The valgrind tool will generate a number of ASCII output files with names callgrind.out.XXXX where XXXX is a number. You can display the results contained in these files using the qcachegrind tool:

$ qcachegrind

The figure below shows the result obtained when running the createfits executable.

qcachegrind window