41  *    Furthermore, in order to avoid synchronizing all per-CPU delta folding
46  *    again, being late doesn't loose the delta, just wrecks the sample.
81 	long nr_active, delta = 0;  in calc_load_fold_active()  local
87 		delta = nr_active - this_rq->calc_load_active;  in calc_load_fold_active()
91 	return delta;  in calc_load_fold_active()
171  * The basic idea is to fold the nr_active delta into a global NO_HZ-delta upon
172  * entering NO_HZ state such that we can include this as an 'extra' CPU delta
180  *    We avoid this by keeping two NO_HZ-delta counters and flipping them
199  *    sample, for this CPU (effectively using the NO_HZ-delta for this CPU which
221 	 * next NO_HZ-delta.  in calc_load_write_idx()
236 	long delta;  in calc_load_nohz_fold()  local
238 	delta = calc_load_fold_active(rq, 0);  in calc_load_nohz_fold()
239 	if (delta) {  in calc_load_nohz_fold()
242 		atomic_long_add(delta, &calc_load_nohz[idx]);  in calc_load_nohz_fold()
249 	 * We're going into NO_HZ mode, if there's any pending delta, fold it  in calc_load_nohz_start()
250 	 * into the pending NO_HZ delta.  in calc_load_nohz_start()
287 	long delta = 0;  in calc_load_nohz_read()  local
290 		delta = atomic_long_xchg(&calc_load_nohz[idx], 0);  in calc_load_nohz_read()
292 	return delta;  in calc_load_nohz_read()
297  * calc_load_fold_active(), but since a NO_HZ CPU folds its delta into
299  * in the pending NO_HZ delta if our NO_HZ period crossed a load cycle boundary.
307 	long delta, active, n;  in calc_global_nohz()  local
314 		delta = jiffies - sample_window - 10;  in calc_global_nohz()
315 		n = 1 + (delta / LOAD_FREQ);  in calc_global_nohz()
353 	long active, delta;  in calc_global_load()  local
360 	 * Fold the 'old' NO_HZ-delta to include all NO_HZ CPUs.  in calc_global_load()
362 	delta = calc_load_nohz_read();  in calc_global_load()
363 	if (delta)  in calc_global_load()
364 		atomic_long_add(delta, &calc_load_tasks);  in calc_global_load()
388 	long delta;  in calc_global_load_tick()  local
393 	delta  = calc_load_fold_active(this_rq, 0);  in calc_global_load_tick()
394 	if (delta)  in calc_global_load_tick()
395 		atomic_long_add(delta, &calc_load_tasks);  in calc_global_load_tick()