performance

[unix-history] / usr / src / bin / csh / time.c

#ifndef lint
static char *sccsid = "@(#)time.c       4.6 (Berkeley) %G%";
#endif

#include "sh.h"

/*
* C Shell - routines handling process timing and niceing
*/

settimes()
{
       struct rusage ruch;

       (void) gettimeofday(&time0, (struct timezone *)0);
       (void) getrusage(RUSAGE_SELF, &ru0);
       (void) getrusage(RUSAGE_CHILDREN, &ruch);
       ruadd(&ru0, &ruch);
}

/*
* dotime is only called if it is truly a builtin function and not a
* prefix to another command
*/
dotime()
{
       struct timeval timedol;
       struct rusage ru1, ruch;

       (void) getrusage(RUSAGE_SELF, &ru1);
       (void) getrusage(RUSAGE_CHILDREN, &ruch);
       ruadd(&ru1, &ruch);
       (void) gettimeofday(&timedol, (struct timezone *)0);
       prusage(&ru0, &ru1, &timedol, &time0);
}

/*
* donice is only called when it on the line by itself or with a +- value
*/
donice(v)
       register char **v;
{
       register char *cp;

       v++, cp = *v++;
       if (cp == 0)
               (void) setpriority(PRIO_PROCESS, 0, 4);
       else if (*v == 0 && any(cp[0], "+-"))
               (void) setpriority(PRIO_PROCESS, 0, 
                   getpriority(PRIO_PROCESS, 0) + getn(cp));
}

ruadd(ru, ru2)
       register struct rusage *ru, *ru2;
{
       register long *lp, *lp2;
       register int cnt;

       tvadd(&ru->ru_utime, &ru2->ru_utime);
       tvadd(&ru->ru_stime, &ru2->ru_stime);
       if (ru2->ru_maxrss > ru->ru_maxrss)
               ru->ru_maxrss = ru2->ru_maxrss;
       cnt = &ru->ru_last - &ru->ru_first + 1;
       lp = &ru->ru_first; lp2 = &ru2->ru_first;
       do
               *lp++ += *lp2++;
       while (--cnt > 0);
}

prusage(r0, r1, e, b)
       register struct rusage *r0, *r1;
       struct timeval *e, *b;
{
       register time_t t =
           (r1->ru_utime.tv_sec-r0->ru_utime.tv_sec)*100+
           (r1->ru_utime.tv_usec-r0->ru_utime.tv_usec)/10000+
           (r1->ru_stime.tv_sec-r0->ru_stime.tv_sec)*100+
           (r1->ru_stime.tv_usec-r0->ru_stime.tv_usec)/10000;
       register char *cp;
       register int i;
       register struct varent *vp = adrof("time");
       int ms =
           (e->tv_sec-b->tv_sec)*100 + (e->tv_usec-b->tv_usec)/10000;

       cp = "%Uu %Ss %E %P %X+%Dk %I+%Oio %Fpf+%Ww";
       if (vp && vp->vec[0] && vp->vec[1])
               cp = vp->vec[1];
       for (; *cp; cp++)
       if (*cp != '%')
               putchar(*cp);
       else if (cp[1]) switch(*++cp) {

       case 'U':
               pdeltat(&r1->ru_utime, &r0->ru_utime);
               break;

       case 'S':
               pdeltat(&r1->ru_stime, &r0->ru_stime);
               break;

       case 'E':
               psecs((long)(ms / 100));
               break;

       case 'P':
               printf("%d%%", (int) (t*100 / ((ms ? ms : 1))));
               break;

       case 'W':
               i = r1->ru_nswap - r0->ru_nswap;
               printf("%d", i);
               break;

       case 'X':
               printf("%d", t == 0 ? 0 : (r1->ru_ixrss-r0->ru_ixrss)/t);
               break;

       case 'D':
               printf("%d", t == 0 ? 0 :
                   (r1->ru_idrss+r1->ru_isrss-(r0->ru_idrss+r0->ru_isrss))/t);
               break;

       case 'K':
               printf("%d", t == 0 ? 0 :
                   ((r1->ru_ixrss+r1->ru_isrss+r1->ru_idrss) -
                   (r0->ru_ixrss+r0->ru_idrss+r0->ru_isrss))/t);
               break;

       case 'M':
               printf("%d", r1->ru_maxrss/2);
               break;

       case 'F':
               printf("%d", r1->ru_majflt-r0->ru_majflt);
               break;

       case 'R':
               printf("%d", r1->ru_minflt-r0->ru_minflt);
               break;

       case 'I':
               printf("%d", r1->ru_inblock-r0->ru_inblock);
               break;

       case 'O':
               printf("%d", r1->ru_oublock-r0->ru_oublock);
               break;
       }
       putchar('\n');
}

pdeltat(t1, t0)
       struct timeval *t1, *t0;
{
       struct timeval td;

       tvsub(&td, t1, t0);
       printf("%d.%01d", td.tv_sec, td.tv_usec/100000);
}

tvadd(tsum, t0)
       struct timeval *tsum, *t0;
{

       tsum->tv_sec += t0->tv_sec;
       tsum->tv_usec += t0->tv_usec;
       if (tsum->tv_usec > 1000000)
               tsum->tv_sec++, tsum->tv_usec -= 1000000;
}

tvsub(tdiff, t1, t0)
       struct timeval *tdiff, *t1, *t0;
{

       tdiff->tv_sec = t1->tv_sec - t0->tv_sec;
       tdiff->tv_usec = t1->tv_usec - t0->tv_usec;
       if (tdiff->tv_usec < 0)
               tdiff->tv_sec--, tdiff->tv_usec += 1000000;
}