SYSTEM_CLOCK — Time function#
-
SYSTEM_CLOCK(COUNT, COUNT_RATE, COUNT_MAX)#
Determines the
COUNT
of a processor clock since an unspecified time in the past moduloCOUNT_MAX
,COUNT_RATE
determines the number of clock ticks per second. If the platform supports a monotonic clock, that clock is used and can, depending on the platform clock implementation, provide up to nanosecond resolution. If a monotonic clock is not available, the implementation falls back to a realtime clock.- Parameters
COUNT – (Optional) shall be a scalar of type
INTEGER
withINTENT(OUT)
.COUNT_RATE – (Optional) shall be a scalar of type
INTEGER
orREAL
, withINTENT(OUT)
.COUNT_MAX – (Optional) shall be a scalar of type
INTEGER
withINTENT(OUT)
.
- Standard:
Fortran 90 and later
- Class:
Subroutine
- Syntax:
CALL SYSTEM_CLOCK([COUNT, COUNT_RATE, COUNT_MAX])
- Example:
PROGRAM test_system_clock INTEGER :: count, count_rate, count_max CALL SYSTEM_CLOCK(count, count_rate, count_max) WRITE(*,*) count, count_rate, count_max END PROGRAM
- See also:
DATE_AND_TIME — Date and time subroutine, CPU_TIME — CPU elapsed time in seconds