From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yang Su Date: Sat, 26 May 2007 08:29:42 +0000 Subject: [LARTC] Problem with the tc statistcis Message-Id: <4657EFF6.2070702@inf.ethz.ch> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org I had a linux wireless router. I would like to monitor the queue lengh of the wireless interface. By default, the wifi0 interface is with pfifo_fast qdisc which does not report backlog packet. I replaced pfifo_fast with pfifo: 'tc qdisc replace dev wifi0 root pfifo' Then I use iperf to send UDP pkts faster than the interface can handle but when I read the qdisc, the result is like: qdisc pfifo 8007: limit 10p Sent 46249560 bytes 30600 pkts (dropped 0, overlimits 0) It is really strange, because over 80% of packets lost is observed by application layer but by qdisc, there is no packet dropped at all and no backlog. Any hints for this result? Thank you, Yang Su _______________________________________________ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc