sys/kern/sched_4bsd.c

367  *	90% of (ts_estcpu) usage in 5 * loadav time
412  *    Solve (factor)**(power) =~ .1 given power (5*loadav):
414  *      ln(factor) =~ (-2.30/5*loadav), or
415  *      factor =~ exp(-1/((5/2.30)*loadav)) =~ exp(-1/(2*loadav)) =
422  *      power =~ 2.3 * (b + 1) = 4.6*loadav + 2.3 =~ 5*loadav.  QED
425  *      loadav: 1       2       3       4
429 /* calculations for digital decay to forget 90% of usage in 5*loadav sec */
430 #define	loadfactor(loadav)	(2 * (loadav))
703  * a lot of CPU time in 5 * loadav seconds.  This causes the system to