From: Rick Jones <rick.jones2@hp.com>
To: Simon Chen <simonchennj@gmail.com>
Cc: Ben Hutchings <bhutchings@solarflare.com>,
Ben Greear <greearb@candelatech.com>,
netdev@vger.kernel.org
Subject: Re: under-performing bonded interfaces
Date: Wed, 16 Nov 2011 17:45:34 -0800 [thread overview]
Message-ID: <4EC4673E.4060605@hp.com> (raw)
In-Reply-To: <CANj2Ebdd89=Fk6i4e4Txsb3ANuzz-x4t+tT6CAnWDNZe0zvx9g@mail.gmail.com>
On 11/16/2011 05:38 PM, Simon Chen wrote:
> Thanks, Ben. That's good discovery...
>
> Are you saying that both 10G NICs are on the same PCIe x4 slot, so
> that they're subject to the 12G throughput bottleneck?
>
> I'm gonna verify this with the hardware vendor...
Look at the PCI addresses - they are:
0000:03:00.0
0000:03:00.1
The numbers after the "dot" are PCI function numbers, meaning that both
*ports* of the dual-port NIC are in the same PCIe slot, in this case a
x4 slot.
more generally, the format is:
DDDD:BB:SS.F
D == DOMAIN; B == BUS; S == SLOT; F == FUNCTION. If domain, bus and
slot are the same, but functions differ, the "devices" are in the same slot.
rick jones
next prev parent reply other threads:[~2011-11-17 1:45 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
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 [this message]
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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