-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi,
I've been tracking down a slow network problem (lots of retransmits, duplicate acks) etc. over ipv6. The solution eventually was to disable checksum offloading on the nic, so there may be a bug there. The server is running an Intel Gigabit NIC (possibly onboard) with PCI ID 8086:10b9 (rev 06). Kernel version is 2.6.31. It's my VM server so runs KVM, and I first noticed the problem in VMs - ipv4 was full speed, ipv6 was at about 5% of normal. Testing on the machine itself showed the problem as well (scp from another machine on the same switch). Not really sure whether that's enough information to look at it. Example test: peach:~ tmh$ scp goliath:/home/tmh/t/100mbtest/100mb.dat . 100mb.dat 0% 48KB 22.6KB/s 1:15:30 ETA peach:~ tmh$ scp -4 goliath:/home/tmh/t/100mbtest/100mb.dat . 100mb.dat 0% 368KB 115.0KB/s 14:46 ETA (this is from a remote machine so is travelling over the DSL uplink.. the local tests are much more dramatic giving 50MB/s for ipv4 and the same 20Kbps for ipv6). Tony -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJLK7t3AAoJEJ1qCQ6ePCDUFJYH/3N+8CMM1TaUA1/4eXw6FMfH Lv+iHv63NmdI1So9VQhmfNSCz+z3gd7y9N1XbwA31DLpE9AG9uXw14lp8x315HN5 qANkRy3ZonYS0KpRnNaKFdGWD6k1kTUFZwUwYqx0ek6xgW8yI8KgQaPI+R2LN1Eh Rw80EXNbEJKB2lHoUZwjE2x+6yQYFQ/QI1OiwhXAOrpd1hcAH9iJwREJEouOW7YW P0nSpkjd1T2vUsDAi4ql5mt5nlslR+XBSyn1y2+hjzKxl4WvAwpHbXqU3s74XT6u 9u0soh6l5f2o9WUtts2d6JYtKNIGQBPOdFkeWrwjQOlKUSonjdEJ7QcLn39uQQk= =WNRk -----END PGP SIGNATURE----- ------------------------------------------------------------------------------ This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel
