Re: [B.A.T.M.A.N.] [PATCH v2 6/7] batman-adv: ELP - use tp meter to estimate the throughput if otherwise not available

+/** + * batadv_v_elp_tp_start() - start a tp meter session for a neighbor + * @neigh: neighbor to run tp meter on + */ +static void batadv_v_elp_tp_start(struct batadv_hardif_neigh_node *neigh) +{ + struct batadv_hard_iface *hard_iface = neigh->if_incoming; + struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); + + neigh->bat_v.tp_meter_running = true; + batadv_tp_start(bat_priv, neigh->addr, neigh, 10, NULL, BATADV_TP_ELP); +}

@@ -152,6 +192,25 @@ static u32 batadv_v_elp_get_throughput(struct batadv_hardif_neigh_node *neigh) return throughput * 10; } +fallback_throughput: + last_tp_run_jiffies = jiffies - neigh->bat_v.last_tp_meter_run; + last_tp_run_msecs = jiffies_to_msecs(last_tp_run_jiffies); + + /* check the tp_meter_running flag before checking the timestamp to + * avoid a race condition where a new tp meter session is scheduled + * right after the previous tp meter session has completed + */ + if (!neigh->bat_v.tp_meter_running && + last_tp_run_msecs > BATADV_ELP_TP_RUN_INTERVAL) + batadv_v_elp_tp_start(neigh);