Hi, I have some doubts about how push and pull are scheduled.
I'm running click on two wireless routers and I'm generating some traffic between them using iPerf. Wireless interfaces are operating in monitor mode and click is running in userspace. The configuration essentially consist of: KernelTun -> CheckIPHeader -> ... other push elements that set route etc. ... -> FullNoteQueue -> WifiEncap, SetTXRate, Radiotapencap -> ToDevice The tx rate is statically set to 6 mbps. The strange this is that if I generate traffic with Iperf at a very high rate (e.g. 10Mbps) I do get an high packet loss as expected, but there is only one packet in the queue. I've added some debug message to the Queue' push and pull method and this is what I get: push pull pull pull pull pull pull pull pull pull pull pull push pull pull pull pull pull pull pull pull pull pull pull push basically it seems that the driver is alway trying to pull from the queue, until the _empty_note is put to sleep and only then a packet is pushed into the queue. What I would expect is that incoming packet should be pushed in to the queue and then eventually dropped if todevice cannot pull them all. Am I missing somthing? R. -- -------------------------------------------------------- Roberto Riggio, Ph.D. CREATE-NET Network& Security Solutions for Pervasive Computing Systems (iNSPIRE) Senior Researcher Via alla Cascata 56/D - 38123 Povo Trento (Italy) e-mail: [email protected] Tel: (+39) 0461 408400 - interno/extension 708 Fax: (+39) 0461 421157 www.create-net.org/~rriggio -------------------------------------------------------- The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited according to the Italian Law 196/2003 of the Legislature. If you received this in error, please contact the sender and delete the material from any computer. Le informazioni contenute in questo messaggio di posta elettronica e nei file allegati sono da considerarsi strettamente riservate. Il loro utilizzo e' consentito esclusivamente al destinatario del messaggio, per le finalita' indicate nel messaggio stesso. Qualora riceveste questo messaggio senza esserne il destinatario, Vi preghiamo cortesemente di darcene notizia via e-mail e di procedere alla cancellazione del messaggio stesso dal Vostro sistema. Trattenere il messaggio stesso, divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od utilizzarlo per finalita' diverse, costituisce comportamento contrario ai principi dettati dal D. Lgs. 196/2003. _______________________________________________ click mailing list [email protected] https://amsterdam.lcs.mit.edu/mailman/listinfo/click
