cputime(2) [plan9 man page]

CPUTIME(2)							System Calls Manual							CPUTIME(2)

NAME

       cputime, times - cpu time in this process and children

SYNOPSIS

       #include <u.h>
       #include <libc.h>

       int    times(long t[4])

       double cputime(void)

DESCRIPTION

       If  t  is  non-null,  times fills it in with the number of milliseconds spent in user code, system calls, child processes in user code, and
       child processes in system calls.  Cputime returns the sum of those same times, converted to seconds.  Times returns the real time, in  mil-
       liseconds used by the process so far.

       These functions read /dev/cputime, opening that file when time is first called.

SOURCE

       /sys/src/libc/9sys

SEE ALSO

       cons(3)

																	CPUTIME(2)

TIMES(2)							System Calls Manual							  TIMES(2)

NAME

       times - get process times

SYNOPSIS

       #include <sys/types.h>
       #include <sys/times.h>
       #include <time.h>

       int times(struct tms *buffer)

DESCRIPTION

       Times returns time-accounting information for the current process and for the terminated child processes of the current process.  All times
       are in 1/CLOCKS_PER_SEC seconds.

       This is the structure returned by times:

	      struct tms {
		  clock_t tms_utime;  /* user time for this process */
		  clock_t tms_stime;  /* system time for this process */
		  clock_t tms_cutime; /* children's user time */
		  clock_t tms_cstime; /* children's system time */
	      };

       The user time is the number of clock ticks used by a process on its own computations.  The system time is the number of clock  ticks  spent
       inside the kernel on behalf of a process.  This does not include time spent waiting for I/O to happen, only actual CPU instruction times.

       The children times are the sum of the children's process times and their children's times.

RETURN

       Times returns 0 on success, otherwise -1 with the error code stored into the global variable errno.

ERRORS

       The following error code may be set in errno:

       [EFAULT]       The address specified by the buffer parameter is not in a valid part of the process address space.

SEE ALSO

       time(1), wait(2), time(2).

4th Berkeley Distribution					    May 9, 1985 							  TIMES(2)