Hello!
> Now it would be still interesting to track the Alpha pmtudisc problem down.
> Can anyone else with an Alpha reproduce it? Alexey, what were the results
> on your box?
I confirm. Enjoy, data burst starts:
20:44:06.293910 > 193.233.7.90.22 > 195.209.208.11.1023: P 1665:3125(1460) ack 660 win
32120 (DF) [tos 0x10] (ttl 64, id 48844)
20:44:06.293910 > 193.233.7.90.22 > 195.209.208.11.1023: P 3125:4585(1460) ack 660 win
32120 (DF) [tos 0x10] (ttl 64, id 48845)
20:44:06.293910 > 193.233.7.90.22 > 195.209.208.11.1023: P 4585:5921(1336) ack 660 win
32120 (DF) [tos 0x10] (ttl 64, id 48846)
20:44:06.295863 > 193.233.7.90.22 > 195.209.208.11.1023: P 5921:7381(1460) ack 660 win
32120 (DF) [tos 0x10] (ttl 64, id 48847)
20:44:06.295863 > 193.233.7.90.22 > 195.209.208.11.1023: P 7381:8841(1460) ack 660 win
32120 (DF) [tos 0x10] (ttl 64, id 48848)
20:44:06.295863 > 193.233.7.90.22 > 195.209.208.11.1023: P 8841:10177(1336) ack 660
win 32120 (DF) [tos 0x10] (ttl 64, id 48849)
>>>> Alisa feels MTU=576. Finita.
20:44:06.301722 > 193.233.7.90.22 > 195.209.208.11.1023: . 1665:2201(536) ack 660 win
32696 (DF) [tos 0x10] (ttl 64, id 48851)
20:44:06.301722 > 193.233.7.90.22 > 195.209.208.11.1023: . 2201:2737(536) ack 660 win
32696 (DF) [tos 0x10] (ttl 64, id 48852)
>>>> Hole (it is without Dave's patch)
20:44:06.301722 > 193.233.7.90.22 > 195.209.208.11.1023: . 3125:3661(536) ack 660 win
32696 (DF) [tos 0x10] (ttl 64, id 48853)
20:44:06.301722 > 193.233.7.90.22 > 195.209.208.11.1023: . 3661:4197(536) ack 660 win
32696 (DF) [tos 0x10] (ttl 64, id 48854)
20:44:06.301722 > 193.233.7.90.22 > 195.209.208.11.1023: . 4585:5121(536) ack 660 win
32696 (DF) [tos 0x10] (ttl 64, id 48855)
20:44:06.301722 > 193.233.7.90.22 > 195.209.208.11.1023: . 5121:5657(536) ack 660 win
32696 (DF) [tos 0x10] (ttl 64, id 48856)
20:44:06.301722 > 193.233.7.90.22 > 195.209.208.11.1023: . 5921:6457(536) ack 660 win
32696 (DF) [tos 0x10] (ttl 64, id 48857)
20:44:06.301722 > 193.233.7.90.22 > 195.209.208.11.1023: . 6457:6993(536) ack 660 win
32696 (DF) [tos 0x10] (ttl 64, id 48858)
20:44:06.301722 > 193.233.7.90.22 > 195.209.208.11.1023: . 7381:7917(536) ack 660 win
32696 (DF) [tos 0x10] (ttl 64, id 48859)
20:44:06.301722 > 193.233.7.90.22 > 195.209.208.11.1023: . 7917:8453(536) ack 660 win
32696 (DF) [tos 0x10] (ttl 64, id 48860)
20:44:06.301722 > 193.233.7.90.22 > 195.209.208.11.1023: . 8841:9377(536) ack 660 win
32696 (DF) [tos 0x10] (ttl 64, id 48861)
20:44:06.301722 > 193.233.7.90.22 > 195.209.208.11.1023: . 9377:9913(536) ack 660 win
32696 (DF) [tos 0x10] (ttl 64, id 48862)
20:44:06.313441 > 193.233.7.90.22 > 195.209.208.11.1023: P 10177:10317(140) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48863)
20:44:06.332972 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46941)
20:44:06.335902 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46942)
20:44:06.339808 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46943)
20:44:06.342738 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46944)
20:44:06.342738 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46945)
20:44:06.344691 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46946)
20:44:06.347621 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46947)
20:44:06.347621 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46948)
20:44:06.350550 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46949)
20:44:06.350550 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46950)
20:44:06.350550 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46951)
20:44:06.353480 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46952)
20:44:06.353480 > 193.233.7.90.22 > 195.209.208.11.1023: P 10317:10853(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48865)
20:44:06.353480 > 193.233.7.90.22 > 195.209.208.11.1023: P 10853:11389(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48866)
20:44:06.353480 > 193.233.7.90.22 > 195.209.208.11.1023: P 11389:11925(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48867)
20:44:06.353480 > 193.233.7.90.22 > 195.209.208.11.1023: P 11925:12461(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48868)
20:44:06.353480 > 193.233.7.90.22 > 195.209.208.11.1023: P 12461:12997(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48869)
20:44:06.353480 > 193.233.7.90.22 > 195.209.208.11.1023: P 12997:13533(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48870)
20:44:06.353480 > 193.233.7.90.22 > 195.209.208.11.1023: P 13533:14069(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48871)
20:44:06.353480 > 193.233.7.90.22 > 195.209.208.11.1023: P 14069:14573(504) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48872)
20:44:06.356410 > 193.233.7.90.22 > 195.209.208.11.1023: P 14573:15109(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48873)
20:44:06.356410 > 193.233.7.90.22 > 195.209.208.11.1023: P 15109:15645(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48874)
20:44:06.356410 > 193.233.7.90.22 > 195.209.208.11.1023: P 15645:16181(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48875)
20:44:06.356410 > 193.233.7.90.22 > 195.209.208.11.1023: P 16181:16717(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48876)
20:44:06.356410 > 193.233.7.90.22 > 195.209.208.11.1023: P 16717:17253(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48877)
20:44:06.356410 > 193.233.7.90.22 > 195.209.208.11.1023: P 17253:17789(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48878)
20:44:06.356410 > 193.233.7.90.22 > 195.209.208.11.1023: P 17789:18325(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48879)
20:44:06.356410 > 193.233.7.90.22 > 195.209.208.11.1023: P 18325:18829(504) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48880)
20:44:06.373988 > 193.233.7.90.22 > 195.209.208.11.1023: P 18829:18961(132) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48882)
>>>>> sparc/intel always retransmit missing segment here. Alpha does not.
20:44:06.375941 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46955)
20:44:06.386683 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46956)
20:44:06.389613 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46957)
20:44:06.392542 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46958)
20:44:06.397425 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46959)
20:44:06.397425 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46960)
20:44:06.400355 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46961)
20:44:06.400355 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46962)
20:44:06.400355 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46963)
20:44:06.403285 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46964)
20:44:06.403285 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46965)
20:44:06.405238 > 193.233.7.90.22 > 195.209.208.11.1023: P 18961:19497(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48884)
20:44:06.405238 > 193.233.7.90.22 > 195.209.208.11.1023: P 19497:20033(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48885)
20:44:06.405238 > 193.233.7.90.22 > 195.209.208.11.1023: P 20033:20569(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48886)
20:44:06.405238 > 193.233.7.90.22 > 195.209.208.11.1023: P 20569:21105(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48887)
20:44:06.405238 > 193.233.7.90.22 > 195.209.208.11.1023: P 21105:21641(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48888)
20:44:06.405238 > 193.233.7.90.22 > 195.209.208.11.1023: P 21641:22177(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48889)
20:44:06.405238 > 193.233.7.90.22 > 195.209.208.11.1023: P 22177:22713(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48890)
20:44:06.405238 > 193.233.7.90.22 > 195.209.208.11.1023: P 22713:23217(504) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48891)
20:44:06.406214 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46966)
20:44:06.407191 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46967)
20:44:06.407191 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46968)
20:44:06.407191 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46969)
20:44:06.407191 > 193.233.7.90.22 > 195.209.208.11.1023: P 23217:23753(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48892)
20:44:06.407191 > 193.233.7.90.22 > 195.209.208.11.1023: P 23753:24289(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48893)
20:44:06.407191 > 193.233.7.90.22 > 195.209.208.11.1023: P 24289:24825(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48894)
20:44:06.407191 > 193.233.7.90.22 > 195.209.208.11.1023: P 24825:25361(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48895)
20:44:06.407191 > 193.233.7.90.22 > 195.209.208.11.1023: P 25361:25897(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48896)
20:44:06.407191 > 193.233.7.90.22 > 195.209.208.11.1023: P 25897:26433(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48897)
20:44:06.407191 > 193.233.7.90.22 > 195.209.208.11.1023: P 26433:26969(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48898)
20:44:06.410121 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46970)
20:44:06.410121 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46971)
20:44:06.411097 > 193.233.7.90.22 > 195.209.208.11.1023: P 26969:27473(504) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48899)
20:44:06.421839 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46972)
20:44:06.425746 > 193.233.7.90.22 > 195.209.208.11.1023: P 27473:27605(132) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48901)
20:44:06.438441 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46973)
20:44:06.438441 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46974)
20:44:06.438441 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46975)
20:44:06.441371 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46976)
20:44:06.445277 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46977)
20:44:06.447230 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46978)
20:44:06.447230 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46979)
20:44:06.447230 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46980)
20:44:06.450160 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46981)
20:44:06.450160 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46982)
20:44:06.450160 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46983)
20:44:06.454066 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46984)
20:44:06.454066 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46985)
20:44:06.454066 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46986)
20:44:06.454066 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46987)
20:44:06.456019 > 193.233.7.90.22 > 195.209.208.11.1023: P 27605:28141(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48903)
20:44:06.456019 > 193.233.7.90.22 > 195.209.208.11.1023: P 28141:28677(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48904)
20:44:06.456019 > 193.233.7.90.22 > 195.209.208.11.1023: P 28677:29213(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48905)
20:44:06.456019 > 193.233.7.90.22 > 195.209.208.11.1023: P 29213:29749(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48906)
20:44:06.456019 > 193.233.7.90.22 > 195.209.208.11.1023: P 29749:30285(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48907)
20:44:06.456019 > 193.233.7.90.22 > 195.209.208.11.1023: P 30285:30821(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48908)
20:44:06.456019 > 193.233.7.90.22 > 195.209.208.11.1023: P 30821:31357(536) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48909)
20:44:06.456019 > 193.233.7.90.22 > 195.209.208.11.1023: P 31357:31861(504) ack 660
win 32696 (DF) [tos 0x10] (ttl 64, id 48910)
20:44:06.473597 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46988)
20:44:06.481410 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46989)
20:44:06.482386 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46990)
20:44:06.482386 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46991)
20:44:06.485316 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46992)
20:44:06.485316 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46993)
20:44:06.485316 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46994)
20:44:06.487269 < 195.209.208.11.1023 > 193.233.7.90.22: . ack 2737 win 64240 (DF)
[tos 0x10] (ttl 61, id 46995)
Yup, it is really looks like alpha problem. I observe it with probability
of 100% and never on intel and sparc.
BTW the behaviour is pathological in any case, seems, snd_cwnd "magically"
becomes huge - 54! It is pretty reliable router killer 8)
Alexey
-
To unsubscribe from this list: send the line "unsubscribe linux-net" in
the body of a message to [EMAIL PROTECTED]
