Thinus Viljoen wrote: > On 10/16/06, Jan Kiszka <[EMAIL PROTECTED]> wrote: >> >> What about delaying after rtifconfig up? >> > > Doesn't help. Well, not a few seconds, anyway.
That's new. > >> >> How do you switch? Shutting all nodes down (rtnet stop), changing >> rtnet.conf files, and restarting them? Could you try to capture the >> traffic with Ethereal/Wireshark so that I can have look if there are >> correct TDMA packets exchanged? >> > > Yes, that is how I switch them. I have attached a capture from a > successful "rtnet start". The timestamps look a bit funny? Indeed. How and on which host did you capture? On the slave, right? Is it possible to use a third station for this instead (to exclude any weirdness of the involved driver)? Also, the capture file contains a cooked format without target addresses. Hmm, it looks like the master fails to patch the transmission timestamp of outgoing packets into that frames. This may cause quite a lot of confusion. Wait... there is no timestamping code in rt_e1000 at all! Argh, my code review failed utterly. Needs to be fixed, hold on. > >> >> That's very likely some hotplug automatism of your distribution. Watch >> out for related services/daemons (I don't know Fedora, sorry) and stop >> them for now. >> > > I think they use "NetworkManager". The only problem is that it is > already disabled. For now I just renamed e1000.ko. On a related point > - I saw that if the Ethernet module is not loaded, and you call > "ifconfig eth1 down", it actually loads the module and puts eth1 up! > Took me a while to figure that one out. > > Other behaviour that I saw recently (I am pretty sure that it worked > better previously): > 1. "rtping" doesn't work - the master reports "ioctl: No buffer space > available" Likely because no packets can be sent (a failing TDMA negotiation would be a reason). > 2. When running "rtnet stop" the slave hangs after calling "rtifconfig > rteth0 down". If I try to manually remove the tdma module, I get an > error that it is "in use". I must then reboot. While I'm looking into the timestamp issue, can you do the same tests with the e100 (thus rt_eepro100) on your box? Just to narrow the issue down to e1000 and make sure there aren't multiple bugs involved. Jan
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