问题
Which profiler do you use for Fortran code base with MPI in it? gprof doesn\'t seem to be working correctly. Sun Studio Analyzer only returns the timings for the C/C++ system calls and none of the fortran functions appear.
回答1:
There are a number of performance analysis tools specialized for Parallel/MPI Programs, such as:
- Score-P, which works with a number of different Analysis tools, e.g. Cube, Vampir
- HPCToolkit uses sampling only, so you do not have to recompile your application
- Tau
At first they may not be as simple to use simple to use, but they provide much more help to investigate the performance of parallel applications.
回答2:
When the questioner says "gprof doesn't seem to be working correctly", perhaps he's referring to the fact that N MPI processes might clobber the gmon.out file. In that case, the (undocumented) GMON_OUT_PREFIX environment variable might make gprof more useful:
$ export GMON_OUT_PREFIX=gmon.out
$ mpiexec -np 4 cpi
回答3:
Allinea MAP is a profiler that is simple and straightforward but very powerful.
It is designed to show the performance problems in Fortran, C and C++ MPI applications, and requires very little effort to get started and get profiling.
It is graphical, and has an integrated with a source code browser that shows performance against lines of code, and able to analyse bad MPI behaviour, poor work balance or poor vectorization.
I am one of the team behind the product, so am a little biased. It is commercial - there are evaluation licences available from the website.
回答4:
gprof is a good profiler for Fortran and other GNU based compilers.
回答5:
You can use Intel Trace analyzer to profile MPI communication and Intel VTune to obtain a profile of single MPI Task. Both software was widely documented on Intel web site.
回答6:
I would like to add two more profilers : (1) mpiP is a lightweight profiler and can produce textual output but measures only MPI functions. (2) Scalasca - this produces a sophisticated output which can point to synchronisation imbalances (late sender / late receiver) also (as opposed to TAU which does not point to synchronisation imbalances).
来源：https://stackoverflow.com/questions/18191635/good-profiler-for-fortran-and-mpi