From e9f0fb88493570200b8dc1cc02d3e676412d25bc Mon Sep 17 00:00:00 2001 From: Mahesh Bandewar Date: Tue, 22 Apr 2014 16:30:22 -0700 Subject: bonding: Add tlb_dynamic_lb parameter for tlb mode 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 -- -r81920,81920 Transactions per second: Before change: 1,367.11 After change: 1,470.65 Change-Id: Ie3f75c77282cf602e83a6e833c6eb164e72a0990 Signed-off-by: Mahesh Bandewar Signed-off-by: David S. Miller --- drivers/net/bonding/bonding.h | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/net/bonding/bonding.h') diff --git a/drivers/net/bonding/bonding.h b/drivers/net/bonding/bonding.h index c0948ca26389..c1c7c2f12ac4 100644 --- a/drivers/net/bonding/bonding.h +++ b/drivers/net/bonding/bonding.h @@ -174,6 +174,7 @@ struct bond_params { int resend_igmp; int lp_interval; int packets_per_slave; + int tlb_dynamic_lb; struct reciprocal_value reciprocal_packets_per_slave; }; -- cgit v1.2.3