contrib/top/loadavg.h

   1 /*
   2  *  Top - a top users display for Berkeley Unix
   3  *
   4  *  Defines required to access load average figures.
   5  *
   6  *  This include file sets up everything we need to access the load average
   7  *  values in the kernel in a machine independent way.  First, it sets the
   8  *  typedef "load_avg" to be either double or long (depending on what is
   9  *  needed), then it defines these macros appropriately:
  10  *
  11  *      loaddouble(la) - convert load_avg to double.
  12  *      intload(i)     - convert integer to load_avg.
  13  */
  14
  15 /*
  16  * We assume that if FSCALE is defined, then avenrun and ccpu are type long.
  17  * If your machine is an exception (mips, perhaps?) then make adjustments
  18  * here.
  19  *
  20  * Defined types:  load_avg for load averages, pctcpu for cpu percentages.
  21  */
  22 #if defined(mips) && !defined(NetBSD)
  23 # include <sys/fixpoint.h>
  24 # if defined(FBITS) && !defined(FSCALE)
  25 #  define FSCALE (1 << FBITS)   /* mips */
  26 # endif
  27 #endif
  28
  29 #ifdef FSCALE
  30 # define FIXED_LOADAVG FSCALE
  31 # define FIXED_PCTCPU FSCALE
  32 #endif
  33
  34 #ifdef ibm032
  35 # undef FIXED_LOADAVG
  36 # undef FIXED_PCTCPU
  37 # define FIXED_PCTCPU PCT_SCALE
  38 #endif
  39
  40
  41 #ifdef FIXED_PCTCPU
  42   typedef long pctcpu;
  43 # define pctdouble(p) ((double)(p) / FIXED_PCTCPU)
  44 #else
  45 typedef double pctcpu;
  46 # define pctdouble(p) (p)
  47 #endif
  48
  49 #ifdef FIXED_LOADAVG
  50   typedef fixpt_t load_avg;
  51 # define loaddouble(la) ((double)(la) / FIXED_LOADAVG)
  52 # define intload(i) ((int)((i) * FIXED_LOADAVG))
  53 #else
  54   typedef double load_avg;
  55 # define loaddouble(la) (la)
  56 # define intload(i) ((double)(i))
  57 #endif