Hi, > What is your real-time requirement? What's the response time upper > bound? I agree with the people who say this may not be right way to go. I want to close a control loop. The faster it is the better it is... Well, to tell concrete numbers, I want to have a response within 300 microseconds. The request and the response amount of data is about 250 byte UDP data each (100 MBit full duplex). Currently, I am using rtnet (http://www.rtnet.org) and the Xenomai real time framework for Linux. This works fine. The drawback of this approach is that rtnet supports only a limited number of support network adapters. (Special network drivers are required). And the preempt patch seems to be closer to standard Linux than a a Xenomai patched kernel. One major problem is that shared interrupts do not really work smoothly with Xenomai... My goal is to replace the Xenomai/rtnet combination with just the kernel-preempt patch. > > > For this I have a separate network adapter in my PC that is used > > solely for this UDP Ethernet traffic. > > However, I think all Ethernet traffic is be handled by > > the soft IRQ threads [softirq-net-rx] [softirq-net-tx] but I do > > not see a way to do real time networking via one of the network adapters. > > > > How can I get this UDP networking real time capable? > > Regards Mathias -- Mathias Koehrer mathias_koehrer@xxxxxxxx Viel oder wenig? Schnell oder langsam? Unbegrenzt surfen + telefonieren ohne Zeit- und Volumenbegrenzung? DAS TOP ANGEBOT FÜR ALLE NEUEINSTEIGER Jetzt bei Arcor: günstig und schnell mit DSL - das All-Inclusive-Paket für clevere Doppel-Sparer, nur 34,95 ? inkl. DSL- und ISDN-Grundgebühr! http://www.arcor.de/rd/emf-dsl-2 - To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
