用OpenFOAM内置的吧。最近的WM_COMPILE_OPTION除了opt，debug模式外，还有一个Prof模式。这个Prof使用开源的gprof做的。效果还是可以的。使用教程见：
https://meywang.wordpress.com/2011/07/29/openfoam-profiling/

1- Add an environmental variable in the .bashrc (or .cshrc) file:
export WM_COMPILE_OPTION=Prof
2- Source the .bashrc file and recompile the OpenFOAM.
3- Then, you will find a new command -pg is using during the compiling.
(Of course, you can just add -pg in the files and options files of the solvers, and step1 is not needed now.)
4- Run the solver you want and a gmon.out file will be created in the case dir.
5- Use
$gprof -b solvername(absolute path is needed)
and you will get the sampling data.
6- One can also use kprof to analyse the sampling data.

效果会像下面一样（随便测的，执行时间太快了不会被统计到）

Each sample counts as 0.01 seconds.
  %   cumulative   self              self     total           
 time   seconds   seconds    calls  us/call  us/call  name    
100.00      0.01     0.01     1401     7.14     7.14  Foam::List<double>::List(Foam::List<double> const&)
  0.00      0.01     0.00    14376     0.00     0.00  Foam::word::stripInvalid()
  0.00      0.01     0.00     9305     0.00     0.00  Foam::List<double>::List(int)
  0.00      0.01     0.00     7812     0.00     0.00  Foam::fvsPatchField<double>::New(Foam::word const&, Foam::word const&, Foam::fvPatch const&, Foam::DimensionedField<double, Foam::surfaceMesh> const&)

还有些可视化的方法可见：
https://codeyarns.com/tech/2013-06-24-how-to-visualize-profiler-output-as-graph-using-gprof2dot.html#gsc.tab=0

效果见：

有个问题就是OpenFOAM的命名空间作用域太长了，生成的这种结构图肥肠不好看。暂时不知道怎么解决

CFD中文网

thegame