clock(3) [ultrix man page]

clock(3)						     Library Functions Manual							  clock(3)

Name
       clock - report CPU time used

Syntax
       #include <time.h>

       clock_t clock ( )

       CLOCKS_PER_SEC

Description
       The routine returns the amount of CPU time (in microseconds) used since the first call to The time reported is the sum of the user and sys-
       tem times of the calling process and its terminated child processes for which it has executed or To determine  the  time  in  seconds,  the
       value returned by should be divided by the value of the macro CLOCKS_PER_SEC.

       The resolution of the clock is 16.667 milliseconds.

Restrictions
       The  value returned by is defined in microseconds for compatibility with systems that have CPU clocks with much higher resolution.  Because
       of this, the value returned will wrap around after accumulating only 2147 seconds of CPU time (about 36 minutes).

See Also
       wait(2), times(3), system(3)

																	  clock(3)

clock(3C)																 clock(3C)

NAME

       clock() - report CPU time used

SYNOPSIS

DESCRIPTION

       returns	the amount of CPU time (in microseconds) used since the first call to The time reported is the sum of the user and system times of
       the calling process and its terminated child processes for which it has executed , or (see wait(2) , system(3S), and popen(3S)).  To deter-
       mine the time in seconds, the value returned by should be divided by the value of the macro

       The resolution of the clock varies, depending on the hardware and on software configuration.

       If the processor time used is not available or its value cannot be represented, the function returns the value

WARNINGS

       The  value returned by is defined in microseconds for compatibility with systems that have CPU clocks with much higher resolution.  Because
       of this, the value returned wraps around after accumulating only 4295 seconds of CPU time (about 72 minutes).

DEPENDENCIES

       The default clock resolution is 10 milliseconds.

SEE ALSO

       times(2), wait(2), system(3S), thread_safety(5).

STANDARDS CONFORMANCE

																	 clock(3C)