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Date: Sat, 26 May 2007 09:58:36 +0200 From: Patrick McHardy <kaber@...sh.net> To: Ranjit Manomohan <ranjitm@...gle.com> CC: netdev@...r.kernel.org Subject: Re: [PATCH][NET_SCHED] Update htb rate when stats are polled. Ranjit Manomohan wrote: > Currently the HTB rate for a class is update very slowly (once > every 16 seconds). This patch updates the rate whenever the stats > are requested from user space. This enables more accurate rate > monitoring. > > +/* Update packet/byte rate for a class. */ > +static void calc_rate(struct htb_class *cl) > +{ > + unsigned long now = jiffies; > + if (time_after(now, (cl->rate_est_when + HZ))) { > + unsigned int elapsed_secs = > + (now - cl->rate_est_when)/HZ; > + cl->sum_bytes /= elapsed_secs; > + cl->sum_packets /= elapsed_secs; > + RT_GEN (cl->sum_bytes,cl->rate_bytes); > + RT_GEN (cl->sum_packets,cl->rate_packets); > + cl->rate_est_when = now; > + } else if time_before(now, cl->rate_est_when) > + cl->rate_est_when = now; /* Wraparound */ > +} We have a generic rate estimator, I think we should convert HTB over to use it and then maybe add this feature to the generic estimator. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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