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MPI_Wtick - Returns the resolution of MPI_Wtime.
#include <mpi.h>
double MPI_Wtick()
INCLUDE ’mpif.h’
DOUBLE PRECISION MPI_WTICK()
#include <mpi.h>
double MPI::Wtick()
Time in seconds of resolution of MPI_Wtime.
MPI_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.
This function does not return an error value. Consequently, the result
of calling it before MPI_Init or after MPI_Finalize is undefined.
MPI_Wtime
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