The problem is that, apparently, ipoib is getting loaded even though it is turned off in openib.conf - so ib0 was coming up without the init script ever setting the options for it.
-- Michael Heinz Principal Engineer, Qlogic Corporation King of Prussia, Pennsylvania -----Original Message----- From: Eli Cohen [mailto:e...@dev.mellanox.co.il] Sent: Monday, June 01, 2009 11:19 AM To: Mike Heinz Cc: general@lists.openfabrics.org Subject: Re: [ofa-general] Ipoib child interfaces are created in dgram mode, even if the config file (and main interface) specify connected mode. On Mon, Jun 01, 2009 at 09:01:23AM -0500, Mike Heinz wrote: > One of our testers recently reported that he was getting different > performance numbers from IPOIB depending on whether he was using interface > ib0 or a child interface he had created with /sys/class/netib0/create_child. > > Investigating, I noticed that the two interfaces have different MTU sizes: > > ib0 Link encap:UNSPEC HWaddr > 80-00-00-02-FE-80-00-00-00-00-00-00-00-00-00-00 > inet addr:172.21.33.58 Bcast:172.21.255.255 Mask:255.255.0.0 > inet6 addr: fe80::211:7500:ff:8fa4/64 Scope:Link > UP BROADCAST RUNNING MULTICAST MTU:65520 Metric:1 > RX packets:76 errors:0 dropped:0 overruns:0 frame:0 > TX packets:23147668 errors:0 dropped:0 overruns:0 carrier:0 > collisions:0 txqueuelen:256 > RX bytes:5284 (5.1 Kb) TX bytes:17365044664 (16560.5 Mb) > > ib0.9001 Link encap:UNSPEC HWaddr > 80-00-00-06-FE-80-00-00-00-00-00-00-00-00-00-00 > inet addr:172.21.34.58 Bcast:172.21.255.255 Mask:255.255.0.0 > inet6 addr: fe80::211:7500:ff:8fa4/64 Scope:Link > UP BROADCAST RUNNING MULTICAST MTU:2044 Metric:1 > RX packets:60413619 errors:0 dropped:0 overruns:0 frame:0 > TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 > collisions:0 txqueuelen:256 > RX bytes:112572449188 (107357.4 Mb) TX bytes:0 (0.0 b) > > > This leads me to believe that the child interface is in datagram mode even > though the parent is in connected mode. Probably it is, but you can always check the mode by reading the corresponding sysfs file: /sys/class/net/ib0.9001/mode > > Is this expected behavior? Yes, it is the expected behaviour. > Is there a way to change this? > Yes, it is possible > -- > Michael Heinz > Principal Engineer, Qlogic Corporation > King of Prussia, Pennsylvania > _______________________________________________ > general mailing list > general@lists.openfabrics.org > http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general > > To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general _______________________________________________ general mailing list general@lists.openfabrics.org http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
