From: "J.Hwan Kim" <frog1120@gmail.com>
To: Rick Jones <rick.jones2@hp.com>
Cc: netdev@vger.kernel.org
Subject: Re: intel 82599 multi-port performance
Date: Tue, 27 Sep 2011 09:39:06 +0900 [thread overview]
Message-ID: <4E811B2A.7000609@gmail.com> (raw)
In-Reply-To: <4E80C161.1040204@hp.com>
On 2011년 09월 27일 03:16, Rick Jones wrote:
> 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?
>
I checked CPU utilization per CPU with top. I pressed "1" after
executing top so that I can view the per-cpu utilization.
prev parent reply other threads:[~2011-09-27 0:39 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
2011-09-27 0:39 ` J.Hwan Kim [this message]
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