Scheduling: CPU time accounting

timer.c::update_process_times()

current->counter--;
if (current->counter <= 0)
current->need_resched = 1;

/* Actualiza las estadisticas ... */
if (running_in_kernel_mode) {
Kstat.cpu_system++;
p->times.system++;
} else {
kstat.cpu_user++;
p->times.user++;
}