On Mon, Aug 16, 2010 at 10:01 PM, Luciano Coelho <luciano.coelho@xxxxxxxxx> wrote: > On Mon, 2010-08-16 at 15:51 +0200, ext Changli Gao wrote: >> >> You can implement a daemon: which samples the statistics data of NIC >> periodically, calculates the average bandwidth in a period, and change >> the condition variables accordingly. > > We don't want to use polling from userspace. That's the reason why we > decided to use iptables instead. The idea is that we will only notify > the userspace when the throughput crosses the threshold line. And the > rules I defined above are working rather well, except for this "detail" > that the BELOW signal is not sent when there's no data flowing. > There is a daemon watching the ABOVE signal in any way. How about staring a timer, which is used to check if there is no packet transfered in a period, in this daemon when receiving the ABOVE signal, and stopping this timer when receiving the BELOW signal? It is like the implementation of IDLETIMER in user space. -- Regards, Changli Gao(xiaosuo@xxxxxxxxx) -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
