40  *    Furthermore, in order to avoid synchronizing all per-CPU delta folding
45  *    again, being late doesn't loose the delta, just wrecks the sample.
80 	long nr_active, delta = 0;  in calc_load_fold_active()  local
86 		delta = nr_active - this_rq->calc_load_active;  in calc_load_fold_active()
90 	return delta;  in calc_load_fold_active()
170  * The basic idea is to fold the nr_active delta into a global NO_HZ-delta upon
171  * entering NO_HZ state such that we can include this as an 'extra' CPU delta
179  *    We avoid this by keeping two NO_HZ-delta counters and flipping them
198  *    sample, for this CPU (effectively using the NO_HZ-delta for this CPU which
220 	 * next NO_HZ-delta.  in calc_load_write_idx()
235 	long delta;  in calc_load_nohz_fold()  local
237 	delta = calc_load_fold_active(rq, 0);  in calc_load_nohz_fold()
238 	if (delta) {  in calc_load_nohz_fold()
241 		atomic_long_add(delta, &calc_load_nohz[idx]);  in calc_load_nohz_fold()
248 	 * We're going into NO_HZ mode, if there's any pending delta, fold it  in calc_load_nohz_start()
249 	 * into the pending NO_HZ delta.  in calc_load_nohz_start()
286 	long delta = 0;  in calc_load_nohz_read()  local
289 		delta = atomic_long_xchg(&calc_load_nohz[idx], 0);  in calc_load_nohz_read()
291 	return delta;  in calc_load_nohz_read()
296  * calc_load_fold_active(), but since a NO_HZ CPU folds its delta into
298  * in the pending NO_HZ delta if our NO_HZ period crossed a load cycle boundary.
306 	long delta, active, n;  in calc_global_nohz()  local
313 		delta = jiffies - sample_window - 10;  in calc_global_nohz()
314 		n = 1 + (delta / LOAD_FREQ);  in calc_global_nohz()
352 	long active, delta;  in calc_global_load()  local
359 	 * Fold the 'old' NO_HZ-delta to include all NO_HZ CPUs.  in calc_global_load()
361 	delta = calc_load_nohz_read();  in calc_global_load()
362 	if (delta)  in calc_global_load()
363 		atomic_long_add(delta, &calc_load_tasks);  in calc_global_load()
387 	long delta;  in calc_global_load_tick()  local
392 	delta  = calc_load_fold_active(this_rq, 0);  in calc_global_load_tick()
393 	if (delta)  in calc_global_load_tick()
394 		atomic_long_add(delta, &calc_load_tasks);  in calc_global_load_tick()