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MPI_Wtick

MPI_Wtick

Section: Open MPI (3) Updated: Oct 05, 2010
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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


 

Index

NAME
SYNTAX
C Syntax
Fortran Syntax
C++ Syntax
RETURN VALUE
DESCRIPTION
NOTE
SEE ALSO

This document was created by man2html, using the manual pages.
Time: 21:50:43 GMT, April 16, 2011