Google performance tool is an excellent tool for profiling C++ code.
- Install libunwind
- Install Google Performance Tools
- Install supporting packages
- Include profiling code in C++
- Run Profiling
- Generate profiling report
wget http://download.savannah.gnu.org/releases/libunwind/libunwind-1.0.1.tar.gz tar xvfz libunwind-1.0.1.tar.gz cd libunwind-1.0.1 export CFLAGS=-U_FORTIFY_SOURCE ./configure make sudo make install
Install Google Performance Tools
wget http://google-perftools.googlecode.com/files/google-perftools-1.8.3.tar.gz tar xvfz google-perftools-1.8.3.tar.gz cd google-perftools-1.8.3 ./configure make sudo make install
Install supporting packages
sudo apt-get install graphviz sudo apt-get install gv
Include profiling code in C++
Include supporting header file(s)
Assuming that profiler output is stored in file /tmp/output.pprof. The following code can be placed anywhere in the code. This is the point at which the profiler will start collecting data. It is possible to start profiling at multiple stages into different files.
It is possible to start profiler at any point of time by placing the following code.
Compile the code and execute it. Once the run is finished or ProfilerStop is called, profiler output will be available in the output file.
Generate profiling report
Several types of reports can be generated from the output file.
X11 need to be enabled for the graphical report.
pprof -gv --lines /tmp/output.pprof