MPI_Wtick - Online Linux Manual PageSection : 3
Updated : Jan 21, 2016
Source : 1.10.2
Note : Open MPI

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NAMEMPI_Wtick − Returns the resolution of MPI_Wtime.

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SYNTAX

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C Syntax#include <mpi.h> double MPI_Wtick()

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Fortran SyntaxINCLUDE 'mpif.h' DOUBLE PRECISION MPI_WTICK()

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C++ Syntax#include <mpi.h> double MPI::Wtick()

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RETURN VALUETime in seconds of resolution of MPI_Wtime.

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DESCRIPTIONMPI_Wtick returns the resolution of MPI_Wtime in seconds. That is, it returns, as a double-precision value, the number of seconds between successive clock ticks. For example, if the clock is implemented by the hardware as a counter that is incremented every millisecond, the value returned by MPI_Wtick should be 10^-3. Note that on POSIX platforms, Open MPI should always return 10^-6 for MPI_Wtick. The returned value may be different on Windows platforms.

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NOTEThis function does not return an error value. Consequently, the result of calling it before MPI_Init or after MPI_Finalize is undefined.

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SEE ALSOMPI_Wtime 0

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