Date: Wed, 25 Jan 2012 12:59:36 +0100 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-performance@freebsd.org Subject: Re: Performance problem using Intel X520-DA2 Message-ID: <jfoqr8$mld$1@dough.gmane.org> In-Reply-To: <909994c3cdd84cb2c47ff8037c23e142@leon.pl> References: <a231a44c6c803075c7b456a6189ff6ce@leon.pl> <CAFOYbcksi7KBpEjH=-hHEoTr35ynwYk98Ushw9nzR27H%2BGVBFA@mail.gmail.com> <jfmbam$37c$1@dough.gmane.org> <909994c3cdd84cb2c47ff8037c23e142@leon.pl>
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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).
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