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NAME
MPI_Wtick - Returns the resolution of MPI_Wtime.
SYNTAX
C Syntax
#include <mpi.h>
double MPI_Wtick()
Fortran Syntax
INCLUDE 'mpif.h'
DOUBLE PRECISION MPI_WTICK()
C++ Syntax
#include <mpi.h>
double MPI::Wtick()
RETURN VALUE
Time in seconds of resolution of MPI_Wtime.
DESCRIPTION
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.
NOTE
This function does not return an error value. Consequently, the result
of calling it before MPI_Init or after MPI_Finalize is undefined.
SEE ALSO
MPI_Wtime
1.3.4 Nov 11, 2009 MPI_Wtick(3)
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