From: Rick Jones <rick.jones2@hp.com>
To: frog1120@gmail.com
Cc: "J.Hwan.Kim" <j.hwan.kim99@gmail.com>,
netdev@vger.kernel.org, netdev <netdev@vger.kernel.org>
Subject: Re: intel 82599 multi-port performance
Date: Mon, 26 Sep 2011 11:16:01 -0700 [thread overview]
Message-ID: <4E80C161.1040204@hp.com> (raw)
In-Reply-To: <4E809D59.10103@gmail.com>
On 09/26/2011 08:42 AM, J.Hwan.Kim wrote:
> On 2011년 09월 26일 23:20, Chris Friesen wrote:
>> On 09/26/2011 04:26 AM, J.Hwan Kim wrote:
>>> Hi, everyone
>>>
>>> Now, I'm testing a network card including intel 82599.
>>> In our experiment, with the driver modified with ixgbe and multi-port
>>> enabled,
>>
>> What do you mean by "modified with ixgbe and multi-port enabled"? You
>> shouldn't need to do anything special to use both ports.
>>
>>> rx performance of each port with 10Gbps of 64bytes frame is
>>> a half than when only 1 port is used.
>>
>> Sounds like a cpu limitation. What is your cpu usage? How are your
>> interrupts routed? Are you using multiple rx queues?
>>
>
> Our server is XEON 2.4GHz with 8 cores.
> I'm using 4 RSS queues for each port and distributed it's interrupts to
> different cores respectively.
> I checked the CPU utilization with TOP, I guess ,it is not cpu imitation
> problem.
99 times out of 10, by default top will show the average CPU utilization
across all the "CPUs" of the system. So I will ask the pedantic question
- Did you check per-CPU utilization or just overall?
rick jones
next prev parent reply other threads:[~2011-09-26 18:16 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-26 10:26 intel 82599 multi-port performance J.Hwan Kim
2011-09-26 14:20 ` Chris Friesen
2011-09-26 15:42 ` J.Hwan.Kim
2011-09-26 16:04 ` Alexander Duyck
2011-09-26 16:40 ` Chris Friesen
2011-09-26 17:24 ` [E1000-devel] " Ben Greear
2011-09-26 17:46 ` Chris Friesen
2011-09-26 17:57 ` Ben Greear
2011-09-27 0:45 ` J.Hwan Kim
2011-09-27 15:30 ` Martin Millnert
2011-09-27 17:14 ` Alexander Duyck
2011-09-27 22:57 ` Chris Friesen
2011-09-26 18:16 ` Rick Jones [this message]
2011-09-27 0:39 ` J.Hwan Kim
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