169 static inline int best_rate_ndx(struct sample_node *sn, int size_bin,   in best_rate_ndx()  argument
176                     int tt = sn->stats[size_bin][x].average_tx_time;  in best_rate_ndx()
178                                         !sn->stats[size_bin][x].packets_acked)) {  in best_rate_ndx()
187                     if (sn->stats[size_bin][x].successive_failures > 3)  in best_rate_ndx()
202 pick_sample_ndx(struct sample_node *sn, int size_bin)   in pick_sample_ndx()  argument
208           current_ndx = sn->current_rate[size_bin];  in pick_sample_ndx()
214           current_tt = sn->stats[size_bin][current_ndx].average_tx_time;  in pick_sample_ndx()
217                     int ndx = (sn->last_sample_ndx[size_bin]+1+x) % sn->num_rates;  in pick_sample_ndx()
224                     if (sn->stats[size_bin][ndx].perfect_tx_time > current_tt)   in pick_sample_ndx()
228 …           if (ticks - sn->stats[size_bin][ndx].last_tx < ((hz * STALE_FAILURE_TIMEOUT_MS)/1000) &&  in pick_sample_ndx()
229                         sn->stats[size_bin][ndx].successive_failures > 3)  in pick_sample_ndx()
247                     sn->last_sample_ndx[size_bin] = ndx;  in pick_sample_ndx()
261           int ndx, size_bin, mrr, best_ndx, change_rates;  in ath_rate_findrate()  local
265           size_bin = size_to_bin(frameLen);  in ath_rate_findrate()
266           best_ndx = best_rate_ndx(sn, size_bin, !mrr);  in ath_rate_findrate()
269                     average_tx_time = sn->stats[size_bin][best_ndx].average_tx_time;  in ath_rate_findrate()
280 …if (sn->sample_tt[size_bin] < average_tx_time * (sn->packets_since_sample[size_bin]*ssc->ath_sampl…  in ath_rate_findrate()
286                               ndx = pick_sample_ndx(sn, size_bin);  in ath_rate_findrate()
287                               if (ndx != sn->current_rate[size_bin]) {  in ath_rate_findrate()
288                                         sn->current_sample_ndx[size_bin] = ndx;  in ath_rate_findrate()
290                                         sn->current_sample_ndx[size_bin] = -1;  in ath_rate_findrate()
292                               sn->packets_since_sample[size_bin] = 0;  in ath_rate_findrate()
296                               if (!sn->packets_sent[size_bin] || best_ndx == -1) {  in ath_rate_findrate()
304 …                                               sn->stats[size_bin][ndx].successive_failures == 0) {  in ath_rate_findrate()
310                               } else if (sn->packets_sent[size_bin] < 20) {  in ath_rate_findrate()
313 …                 } else if (ticks - ((hz*MIN_SWITCH_MS)/1000) > sn->ticks_since_switch[size_bin]) {  in ath_rate_findrate()
316 …} else if (average_tx_time * 2 < sn->stats[size_bin][sn->current_rate[size_bin]].average_tx_time) {  in ath_rate_findrate()
321                               sn->packets_since_sample[size_bin]++;  in ath_rate_findrate()
324                                         if (best_ndx != sn->current_rate[size_bin]) {  in ath_rate_findrate()
328                                                             packet_size_bins[size_bin],  in ath_rate_findrate()
329 …                                                        sn->rates[sn->current_rate[size_bin]].rate,  in ath_rate_findrate()
330 …                                   sn->stats[size_bin][sn->current_rate[size_bin]].average_tx_time,  in ath_rate_findrate()
331 …                                   sn->stats[size_bin][sn->current_rate[size_bin]].perfect_tx_time,  in ath_rate_findrate()
333 …                                                     sn->stats[size_bin][best_ndx].average_tx_time,  in ath_rate_findrate()
334 …                                                     sn->stats[size_bin][best_ndx].perfect_tx_time,  in ath_rate_findrate()
335                                                             sn->packets_since_switch[size_bin],  in ath_rate_findrate()
338                                         sn->packets_since_switch[size_bin] = 0;  in ath_rate_findrate()
339                                         sn->current_rate[size_bin] = best_ndx;  in ath_rate_findrate()
340                                         sn->ticks_since_switch[size_bin] = ticks;  in ath_rate_findrate()
342                               ndx = sn->current_rate[size_bin];  in ath_rate_findrate()
343                               sn->packets_since_switch[size_bin]++;  in ath_rate_findrate()
344                               if (size_bin == 0) {  in ath_rate_findrate()
362           sn->packets_sent[size_bin]++;  in ath_rate_findrate()
372           int size_bin = 0;  in ath_rate_setupxtxdesc()  local
375           size_bin = size_to_bin(frame_size);     // TODO: it's correct that frame_size always 0 ?  in ath_rate_setupxtxdesc()
376           ndx = sn->current_rate[size_bin]; /* retry at the current bit-rate */  in ath_rate_setupxtxdesc()
378           if (!sn->stats[size_bin][ndx].packets_acked) {  in ath_rate_setupxtxdesc()
407           int size_bin;  in update_stats()  local
414           size_bin = size_to_bin(frame_size);  in update_stats()
415           size = bin_to_size(size_bin);  in update_stats()
442           if (sn->stats[size_bin][ndx0].total_packets < (100 / (100 - ssc->ath_smoothing_rate))) {  in update_stats()
444                     int avg_tx = sn->stats[size_bin][ndx0].average_tx_time;  in update_stats()
445                     int packets = sn->stats[size_bin][ndx0].total_packets;  in update_stats()
446                     sn->stats[size_bin][ndx0].average_tx_time = (tt+(avg_tx*packets))/(packets+1);  in update_stats()
449                     sn->stats[size_bin][ndx0].average_tx_time =   in update_stats()
450 …                          ((sn->stats[size_bin][ndx0].average_tx_time * ssc->ath_smoothing_rate) +   in update_stats()
456                     sn->stats[size_bin][ndx0].successive_failures++;  in update_stats()
457                     for (y = size_bin+1; y < NUM_PACKET_SIZE_BINS; y++) {  in update_stats()
468                     sn->stats[size_bin][ndx0].packets_acked++;  in update_stats()
469                     sn->stats[size_bin][ndx0].successive_failures = 0;  in update_stats()
471           sn->stats[size_bin][ndx0].tries += tries;  in update_stats()
472           sn->stats[size_bin][ndx0].last_tx = ticks;  in update_stats()
473           sn->stats[size_bin][ndx0].total_packets++;  in update_stats()
476           if (ndx0 == sn->current_sample_ndx[size_bin]) {  in update_stats()
480                               sn->stats[size_bin][ndx0].average_tx_time,  in update_stats()
481                               sn->stats[size_bin][ndx0].perfect_tx_time,  in update_stats()
483                     sn->sample_tt[size_bin] = tt;  in update_stats()
484                     sn->current_sample_ndx[size_bin] = -1;  in update_stats()