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George Bosilca 9bced03213
Improve the range and accuracy of MPI_Wtime.
As discussed on https://github.com/mpi-forum/mpi-issues/issues/77#issuecomment-369663119
the conversion to double in the MPI_Wtime decrease the range
and accuracy of the resulting timer. By setting the timer to
0 at the first usage we basically maintain the accuracy for
194 days even for gettimeofday.

Signed-off-by: George Bosilca <bosilca@icl.utk.edu>
2018-03-08 14:26:02 +09:00
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