int gen_new_estimator (struct gnet_stats_basic * bstats, struct gnet_stats_rate_est * rate_est, spinlock_t * stats_lock, struct rtattr * opt);
Creates a new rate estimator with &bstats as source and &rate_est as destination. A new timer with the interval specified in the configuration TLV is created. Upon each interval, the latest statistics will be read from &bstats and the estimated rate will be stored in &rate_est with the statistics lock grabed during this period.
Returns 0 on success or a negative error code.