> Von: Or Gerlitz [[email protected]] > Gesendet: Dienstag, 29. Oktober 2013 14:58 > An: Erez Shitrit > Cc: Markus Stockhausen; [email protected]; Yishai Hadas; > [email protected]; Erez Shitrit; Saeed Mahameed > Betreff: Re: AW: ACK behaviour difference LRO/GRO > > On 29/10/2013 14:55, Erez Shitrit wrote: > > In addition to what Or just wrote, > > GRO currently doesn't work on ipoib interfaces, that according to bad > > handling mac address that are not 6 bytes (we have plans to fix that > > in the near future), that is the reason you don't see 64k packets on > > tcpdump (like you see in LRO). > > I just checked with net-next which is 3.12-rc6+ and there IS > aggregationfor datagram mode > > > 15:56:40.983883 IP 192.168.20.18.55714 > 192.168.20.17.40861: Flags > > [.], seq 1801688305:1801692289, ack 1, win 220, options [nop,nop,TS > > val 44014459 ecr 305403520], length 3984 > > 15:56:40.983942 IP 192.168.20.18.55714 > 192.168.20.17.40861: Flags > > [.], seq 1801692289:1801756033, ack 1, win 220, options [nop,nop,TS > > val 44014459 ecr 305403520], length 63744 > > 15:56:40.984027 IP 192.168.20.18.55714 > 192.168.20.17.40861: Flags > > [.], seq 1801756033:1801819777, ack 1, win 220, options [nop,nop,TS > > val 44014459 ecr 305403520], length 63744 > > 15:56:40.984079 IP 192.168.20.17.40861 > 192.168.20.18.55714: Flags > > [.], ack 1801688305, win 1544, options [nop,nop,TS val 305403520 ecr > > 44014459], length 0 > > 15:56:40.984104 IP 192.168.20.18.55714 > 192.168.20.17.40861: Flags > > [.], seq 1801819777:1801823649, ack 1, win 220, options [nop,nop,TS > > val 44014459 ecr 305403520], length 3872 > > 15:56:40.984159 IP 192.168.20.18.55714 > 192.168.20.17.40861: Flags > > [.], seq 1801823649:1801883521, ack 1, win 220, options [nop,nop,TS > > val 44014459 ecr 305403520], length 59872 > > 15:56:40.984214 IP 192.168.20.17.40861 > 192.168.20.18.55714: Flags > > [.], ack 1801819777, win 1009, options [nop,nop,TS val 305403520 ecr > > 44014459], length 0 > > 15:56:40.984241 IP 192.168.20.18.55714 > 192.168.20.17.40861: Flags > > [.], seq 1801883521:1801887393, ack 1, win 220, options [nop,nop,TS > > val 44014459 ecr 305403520], length 3872 >
Thanks to both of you for that clarification. Nevertheless this info seems a little contradictionary. Should I exepect GRO to work on Mellanox IB cards with Linux 3.12 in general? Or is this only an effect because you have test cards with "good mac addresses"? Markus
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