330. Multiple Levels of Interception
Up: Profiling Interface
Next: The MPI Tool Information Interface
Previous: Fortran Support Methods
The scheme given here does not directly support the nesting of
profiling functions, since it provides only a single alternative name
for each MPI function. Consideration was given to an implementation
that
would allow multiple levels of call interception, however we
were unable to construct an implementation of this
that
did not
have the following disadvantages
- assuming a particular implementation language,
- imposing a run time cost even when no profiling was taking place.
Since one of the objectives of MPI is to permit efficient, low latency
implementations, and it is not the business of a standard to require a
particular implementation language, we decided to accept the scheme
outlined above.
Note, however, that it is possible to use the scheme above to implement a multi-level system, since the function called by the user may call many different profiling functions before calling the underlying MPI function. This capability has been demonstrated in the PNMPI tool infrastructure [51].
Up: Profiling Interface
Next: The MPI Tool Information Interface
Previous: Fortran Support Methods
Return to MPI-3.1 Standard Index
Return to MPI Forum Home Page
(Unofficial) MPI-3.1 of June 4, 2015
HTML Generated on June 4, 2015