Intel® Fortran Compiler XE 13.1 User and Reference Guides

DCLOCK

Portability Function: Returns the elapsed time in seconds since the start of the current process.

Module

USE IFPORT

result = DCLOCK( )

Results

The result type is REAL(8). This routine provides accurate timing to the nearest millisecond (Windows* OS) or to the nearest microsecond (Linux* OS and OS X*), taking into account the frequency of the processor where the current process is running.

Note that the first call to DCLOCK performs calibration.

Example

USE IFPORT
DOUBLE PRECISION START_TIME, STOP_TIME
START_CLOCK = DCLOCK()
CALL FOO()
STOP_CLOCK = DCLOCK()
PRINT *, 'foo took:', STOP_CLOCK - START_CLOCK, 'seconds.'

See Also


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