Hello, I'm currently trying to track down an interesting packet loss issue. The problem occurs with this card (lspci):
20:00.0 Ethernet controller: Intel Corporation 82576 Gigabit Network Connection (rev 01) 20:00.1 Ethernet controller: Intel Corporation 82576 Gigabit Network Connection (rev 01) Every sixth boot or so I get a packet loss of 50% and more. Disconnecting the cable and reconnecting it solves the issue. -------------------------------------------------------------------- $ ping -s 8192 192.168.111.254 PING 192.168.111.254 (192.168.111.254) 8192(8220) bytes of data. 8200 bytes from 192.168.111.254: icmp_req=3 ttl=64 time=0.485 ms 8200 bytes from 192.168.111.254: icmp_req=5 ttl=64 time=0.489 ms 8200 bytes from 192.168.111.254: icmp_req=8 ttl=64 time=0.477 ms ^C --- 192.168.111.254 ping statistics --- 8 packets transmitted, 3 received, 62% packet loss, time 7000ms -------------------------------------------------------------------- Tested with kernel 2.6.34, 2.6.36, 2.6.37 and 2.6.38. Detection on boot: Apr 1 14:06:09 kernel: igb 0000:20:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 Apr 1 14:06:09 kernel: igb 0000:20:00.0: Intel(R) Gigabit Ethernet Network Connection Apr 1 14:06:09 kernel: igb 0000:20:00.0: eth1: (PCIe:2.5Gb/s:Width x4) 00:1b:21:6e:9c:76 Apr 1 14:06:09 kernel: igb 0000:20:00.0: eth1: PBA No: e43709-005 Apr 1 14:06:09 kernel: igb 0000:20:00.0: Using MSI-X interrupts. 4 rx queue(s), 4 tx queue(s) Apr 1 14:06:09 kernel: igb 0000:20:00.1: PCI INT B -> GSI 17 (level, low) -> IRQ 17 Apr 1 14:06:09 kernel: igb 0000:20:00.1: Intel(R) Gigabit Ethernet Network Connection Apr 1 14:06:09 kernel: igb 0000:20:00.1: eth2: (PCIe:2.5Gb/s:Width x4) 00:1b:21:6e:9c:77 Apr 1 14:06:09 kernel: igb 0000:20:00.1: eth2: PBA No: e43709-005 Apr 1 14:06:09 kernel: igb 0000:20:00.1: Using MSI-X interrupts. 4 rx queue(s), 4 tx queue(s) Apr 1 14:06:09 kernel: igb: eth1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX Link detection after reconnect: Apr 1 14:07:20 kernel: igb: eth1 NIC Link is Down Apr 1 14:07:24 kernel: igb: eth1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX I don't seem to be able to reproduce the issue with another switch, tried over 15+ reboots. I've double checked the switch itself is fine by only connecting two systems to it and also tested different ports. Using a e1000e based card instead of igb seems fine, too. Though this might all be unrelated as I takes some boots until the issue appears again. A co-worker reported a similar sounding issue earlier, except that this time it's without virtualization: http://www.mail-archive.com/[email protected]/msg02720.html Any idea what could be going on? I'll retry with kernel 2.6.39rc-1 in the meantime. Thanks in advance, Thomas Jarosch ------------------------------------------------------------------------------ Create and publish websites with WebMatrix Use the most popular FREE web apps or write code yourself; WebMatrix provides all the features you need to develop and publish your website. http://p.sf.net/sfu/ms-webmatrix-sf _______________________________________________ E1000-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
