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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:
Mahesh Bandewar <maheshb@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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