Anders Blomdell wrote: > Anders Blomdell wrote: >> Hi, >> >> I'm trying to use rt_eepro100, for sending raw ethernet packets, but I'm >> experincing occasionally weird behaviour. >> >> Versions of things: >> >> linux-2.6.34.5 >> xenomai-2.5.5.2 >> rtnet-39f7fcf >> >> The testprogram runs on two computers with "Intel Corporation >> 82557/8/9/0/1 Ethernet Pro 100 (rev 08)" controller, where one computer >> acts as a mirror sending back packets received from the ethernet (only >> those two computers on the network), and the other sends packets and >> measures roundtrip time. Most packets comes back in approximately 100 >> us, but occasionally the reception times out (once in about 100000 >> packets or more), but the packets gets immediately received when >> reception is retried, which might indicate a race between rt_dev_recvmsg >> and interrupt, but I might miss something obvious. > > Changing one of the ethernet cards to a "Intel Corporation 82541PI > Gigabit Ethernet Controller (rev 05)", while keeping everything else > constant, changes behavior somewhat; after receiving a few 100000 > packets, reception stops entirely (-EAGAIN is returned), while > transmission proceeds as it should (and mirror returns packets). > > Any suggestions on what to try?
Since the problem disappears with 'maxcpus=1', I suspect I have a SMP issue (machine is a Core2 Quad), so I'll move to xenomai-core. (original message can be found at http://sourceforge.net/mailarchive/message.php?msg_name=4CC82C8D.3080808%40control.lth.se ) Xenomai-core gurus: which is the corrrect way to debug SMP issues? Can I run I-pipe-tracer and expect to be able save at least 150 us of traces for all cpus? Any hints/suggestions/insigths are welcome... Regards Anders Blomdell ------------------------------------------------------------------------------ Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev _______________________________________________ RTnet-users mailing list RTnet-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/rtnet-users
