# 4.18. Profiling Interface

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The profiling interface, as described in Chapter 8 of MPI-1.1, must be supported for all MPI-2 functions, except those allowed as macros (See Section Functions and Macros ). This requires, in C and Fortran, an alternate entry point name, with the prefix `PMPI_` for each MPI function. The profiling interface in C++ is described in Section Profiling .

For routines implemented as macros, it is still required that the PMPI_ version be supplied and work as expected, but it is not possible to replace at link time the MPI_ version with a user-defined version. This is a change from MPI-1.2.

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MPI-2.0 of July 18, 1997
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