Hi everybody! I have detected a strange issue that occurrs occassionly with the rt_eepro100 driver, but I have never seen it with the rt_e1000 driver: I have an embedded device that sends data to my rtnet/RTAI-3.3-cv PC via UDP. The data comes in periodically (Period is 1ms) , it consists of one big UDP message (1472 byte data), followed directly by a fairly small one (80 byte data). I confirm the reception by sending back a UDP message to the embedded device, then the embedded device may send the next message. Now the strange thing is, that occassionaly (about every 5-10 minutes, i.e. every 300000 - 600000 times), the signaling of the second UDP message on rtnet gets somehow lost. I read the first message with a rt_dev_recv() on a socket that has a fairly long timeout (some seconds), then I switch down the timeout to a short timeout (1ms) and wait for the second message (again with rt_dev_recv). This second read faily occassionally (see above) with a timeout. However, when I ignore this timeout and the missing message and send the confirmation message to the embedded device, it will continue to send. The issue is now, that the next rt_dev_recv() returns exactly the message I was waiting for before. I.e. I can now read the missing 80 byte message, the new 1472 byte message and the new 80 byte message. This looks as if the signaling of the message reception fails occassionally. All the rt_dev_recv() calls are done from a kernel module.
I did the same test using the rt_e1000 but not the rt_eepro100. With the rt_e1000 I never saw this issue, thus I assume it has somehow to do with the driver. I ran the tests with RTNET 0.9.4 and 0.9.6 - there was no difference. I am using a Intel Pentium 4, UP, kernel-2.4.33, rtai-3.3-cv. Any ideas or help on this issue are highly welcome! Thanks a lot Mathias -- Mathias Koehrer [EMAIL PROTECTED] Viel oder wenig? Schnell oder langsam? Unbegrenzt surfen + telefonieren ohne Zeit- und Volumenbegrenzung? DAS TOP ANGEBOT JETZT bei Arcor: günstig und schnell mit DSL - das All-Inclusive-Paket für clevere Doppel-Sparer, nur 44,85 inkl. DSL- und ISDN-Grundgebühr! http://www.arcor.de/rd/emf-dsl-2 ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ RTnet-users mailing list RTnet-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/rtnet-users
