usr/src/old/refer/hunt/tick.c

/* time programs */
# include "stdio.h"
# include "sys/types.h"
# include "sys/timeb.h"
struct tbuffer {
        long    proc_user_time;
        long    proc_system_time;
        long    child_user_time;
        long    child_system_time;
};
static long start, user, system;
tick()
{
        struct tbuffer tx;
        struct timeb tp;
        times (&tx);
        ftime (&tp);
        user =  tx.proc_user_time;
        system= tx.proc_system_time;
        start = tp.time*1000+tp.millitm;
}
tock()
{
        struct tbuffer tx;
        struct timeb tp;
        float lap, use, sys;
        if (start==0) return;
        times (&tx);
        ftime (&tp);
        lap = (tp.time*1000+tp.millitm-start)/1000.;
        use = (tx.proc_user_time - user)/60.;
        sys = (tx.proc_system_time - system)/60.;
        printf("Elapsed %.2f CPU %.2f (user %.2f, sys %.2f)\n",
                lap, use+sys, use, sys);
}