42  *    Furthermore, in order to avoid synchronizing all per-CPU delta folding
47  *    again, being late doesn't loose the delta, just wrecks the sample.
82 	long nr_active, delta = 0;  in calc_load_fold_active()  local
88 		delta = nr_active - this_rq->calc_load_active;  in calc_load_fold_active()
92 	return delta;  in calc_load_fold_active()
172  * The basic idea is to fold the nr_active delta into a global NO_HZ-delta upon
173  * entering NO_HZ state such that we can include this as an 'extra' CPU delta
181  *    We avoid this by keeping two NO_HZ-delta counters and flipping them
200  *    sample, for this CPU (effectively using the NO_HZ-delta for this CPU which
222 	 * next NO_HZ-delta.  in calc_load_write_idx()
237 	long delta;  in calc_load_nohz_fold()  local
239 	delta = calc_load_fold_active(rq, 0);  in calc_load_nohz_fold()
240 	if (delta) {  in calc_load_nohz_fold()
243 		atomic_long_add(delta, &calc_load_nohz[idx]);  in calc_load_nohz_fold()
250 	 * We're going into NO_HZ mode, if there's any pending delta, fold it  in calc_load_nohz_start()
251 	 * into the pending NO_HZ delta.  in calc_load_nohz_start()
288 	long delta = 0;  in calc_load_nohz_read()  local
291 		delta = atomic_long_xchg(&calc_load_nohz[idx], 0);  in calc_load_nohz_read()
293 	return delta;  in calc_load_nohz_read()
298  * calc_load_fold_active(), but since a NO_HZ CPU folds its delta into
300  * in the pending NO_HZ delta if our NO_HZ period crossed a load cycle boundary.
308 	long delta, active, n;  in calc_global_nohz()  local
315 		delta = jiffies - sample_window - 10;  in calc_global_nohz()
316 		n = 1 + (delta / LOAD_FREQ);  in calc_global_nohz()
354 	long active, delta;  in calc_global_load()  local
361 	 * Fold the 'old' NO_HZ-delta to include all NO_HZ CPUs.  in calc_global_load()
363 	delta = calc_load_nohz_read();  in calc_global_load()
364 	if (delta)  in calc_global_load()
365 		atomic_long_add(delta, &calc_load_tasks);  in calc_global_load()
389 	long delta;  in calc_global_load_tick()  local
394 	delta  = calc_load_fold_active(this_rq, 0);  in calc_global_load_tick()
395 	if (delta)  in calc_global_load_tick()
396 		atomic_long_add(delta, &calc_load_tasks);  in calc_global_load_tick()