Another option, perhaps more verbose, is as follows:
> mpirun -np 2 ./bin/pvbatch -l /tmp/logs.txt,TRACE -- /tmp/sample.py
this will generate /tmp/logs.txt.0, /tmp/logs.txt.1, … which give more info about various inner workings. You can qualify the log to only print filter execution info, for example, using something like the following:
> env PARAVIEW_LOG_EXECUTION_VERBOSITY=INFO \
mpirun -np 2 ./bin/pvbatch -l /tmp/logs.txt -- /tmp/sample.py
Available variables are documented here.