From: Ben Greear <greearb@candelatech.com>
To: Simon Chen <simonchennj@gmail.com>
Cc: netdev@vger.kernel.org
Subject: Re: under-performing bonded interfaces
Date: Wed, 16 Nov 2011 16:01:15 -0800 [thread overview]
Message-ID: <4EC44ECB.4050201@candelatech.com> (raw)
In-Reply-To: <CANj2EbeMRzicixHwrKpCQ3mMqQ1qbyjbRCxpW+CmVRREAhyeRQ@mail.gmail.com>
On 11/16/2011 03:44 PM, Simon Chen wrote:
> Hello,
>
> I am bonding two 10G interfaces (ixgbe driver) under Debian 6.0.2. The
> bonded interface for some reason can only achieve 12Gbps aggregated
> throughput. If a single NIC is used, I can get close to 10Gbps.
>
> I've tried different bonding modes (balance-xor, 802.3ad, balance-alb,
> balance-tlb), and different xmit hashing policy (layer2, layer2+3,
> layer3+4). I've increased all types of kernel parameters for TCP. MTU
> on the physical and bonded interface is set to 8000 and 9000. The MTU
> on the switch is 9200+.
>
> Instead of nperf (a single server), I also tried my own TCP sender and
> receivers.
>
> All those done, still only 12Gbps... How can I really achieve close to 20Gbps?
>
> (I also tried cutting loose the switch in between, and also getting
> 12G, so not an issue with the switch.)
How much can you get if you run each of the NIC ports independently
w/out bonding? Plz send the 'dmesg' messages about ixgbe (ie, how
many lanes, how many GT/s). What is your processor?
Thanks,
Ben
--
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc http://www.candelatech.com
next prev parent reply other threads:[~2011-11-17 0:01 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-16 23:44 under-performing bonded interfaces Simon Chen
2011-11-17 0:01 ` Ben Greear [this message]
2011-11-17 0:05 ` Simon Chen
2011-11-17 0:07 ` Ben Greear
2011-11-17 0:57 ` Ben Hutchings
2011-11-17 1:38 ` Simon Chen
2011-11-17 1:45 ` Simon Chen
2011-11-17 1:45 ` Rick Jones
2011-11-17 2:51 ` Ben Hutchings
2011-12-22 1:26 ` Simon Chen
2011-12-22 1:36 ` Stephen Hemminger
2011-12-22 3:31 ` Ben Greear
2011-12-22 2:28 ` Simon Chen
2011-12-22 5:43 ` Eric Dumazet
2011-12-23 15:03 ` Simon Chen
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