8ab7495c2d
by making p_estcpu fixpt_t. PR/31542. 1. schedcpu() decreases p_estcpu of all processes every seconds, by at least 1 regardless of load average. 2. schedclock() increases p_estcpu of curproc by 1, at about 16 hz. in the consequence, if a system has >16 processes with runnable lwps, their p_estcpu are not likely increased. by making p_estcpu fixpt_t, we can decay it more slowly when loadavg is high. (ie. solve #1.) i left kinfo_proc2::p_estcpu (ie. ps -O cpu) scaled because i have no idea about its absolute value's usage other than debugging, for which raw values are more valuable.