Dynamic instrumentation is achieved through library pre-loading. The
libraries chosen for pre-loading determine the scope of instrumentation.
Some options include tracking MPI, io, memory, cuda, opencl library
calls. MPI instrumentation is included by default the others are enabled by command-line options to
tau_exec. More info at the
tau_exec manual page. Dynamic
instrumentation can be used on both uninstrumented binaries and binaries
instrumented via one of the methods below, in this way different layers of
instrumentation can be combined.
tau_exec place this command before the
application executable when running the application. In this example IO
instrumentation is requested.
%> tau_exec -io ./a.out %> mpirun -np 4 tau_exec -io ./a.out