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author | Mahesh Bandewar <maheshb@google.com> | 2014-04-23 03:30:22 +0400 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2014-04-24 21:04:34 +0400 |
commit | e9f0fb88493570200b8dc1cc02d3e676412d25bc (patch) | |
tree | edd781d8c00772c53e0736a95cf26f0ef2e620dc /drivers/net/bonding/bonding.h | |
parent | f05b42eaa22cd7c6736d31316e6046c5127f8721 (diff) | |
download | linux-e9f0fb88493570200b8dc1cc02d3e676412d25bc.tar.xz |
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 <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>
Diffstat (limited to 'drivers/net/bonding/bonding.h')
-rw-r--r-- | drivers/net/bonding/bonding.h | 1 |
1 files changed, 1 insertions, 0 deletions
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; }; |