• Mahesh Bandewar's avatar
    bonding: Add tlb_dynamic_lb parameter for tlb mode · e9f0fb88
    Mahesh Bandewar authored
    The aggresive load balancing causes packet re-ordering as active
    flows are moved from a slave to another within the group. Sometime
    this aggresive lb is not necessary if the preference is for less
    re-ordering. This parameter if used with value "0" disables
    this dynamic flow shuffling minimizing packet re-ordering. Of course
    the side effect is that it has to live with the static load balancing
    that the hashing distribution provides. This impact is less severe if
    the correct xmit-hashing-policy is used for the tlb setup.
    
    The default value of the parameter is set to "1" mimicing the earlier
    behavior.
    
    Ran the netperf test with 200 stream for 1 min between two hosts with
    4x1G trunk (xmit-lb mode with xmit-policy L3+4) before and after these
    changes. Following was the command used for those 200 instances -
    
        netperf -t TCP_RR -l 60 -s 5 -H <host> -- -r81920,81920
    
    Transactions per second:
        Before change: 1,367.11
        After  change: 1,470.65
    
    Change-Id: Ie3f75c77282cf602e83a6e833c6eb164e72a0990
    Signed-off-by: default avatarMahesh Bandewar <maheshb@google.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    e9f0fb88
bond_alb.c 48.9 KB