Date: Wed, 25 Jan 2012 15:18:31 +0200 From: Nikolay Denev <ndenev@gmail.com> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-performance@freebsd.org Subject: Re: Performance problem using Intel X520-DA2 Message-ID: <D048333F-BF93-4A2E-8081-F5AC39C09B35@gmail.com> In-Reply-To: <jfoqr8$mld$1@dough.gmane.org> References: <a231a44c6c803075c7b456a6189ff6ce@leon.pl> <CAFOYbcksi7KBpEjH=-hHEoTr35ynwYk98Ushw9nzR27H%2BGVBFA@mail.gmail.com> <jfmbam$37c$1@dough.gmane.org> <909994c3cdd84cb2c47ff8037c23e142@leon.pl> <jfoqr8$mld$1@dough.gmane.org>
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On Jan 25, 2012, at 1:59 PM, Ivan Voras wrote:
> On 24/01/2012 17:53, Marcin Markowski wrote:
>> On 24.01.2012 14:22, Ivan Voras wrote:
>>>> On Mon, Jan 23, 2012 at 12:20 PM, Marcin
>>>> Markowski<mmarkowski@leon.pl>wrote:
>>>
>>>>> (on 9.0 we can see also kernel thread named {ix0 que} using 100% CPU),
>>>
>>>>> hw.ixgbe.num_queues=16
>>>
>>> If there really are 16 hardware queues, shouldn't there be 16 kernel
>>> threads for queue processing?
>>
>> There are 16 threads, but only one of them consumes 100% CPU and the others
>> do not use more than 5% CPU:
>>
>> http://pastebin.com/BWDWh8kW
>
> You need Jack to confirm it but this looks like a serious problem / bottleneck. It just shouldn't be like that (if the test is exactly the same).
>
Is this by any chance non-IP traffic (or encapsulated in some way).
I remember similar thread : http://freebsd.1045724.n5.nabble.com/igb-ixgbe-RSS-RX-queues-for-non-IP-traffic-td4778961.html
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