netdev - Re: [i40e] regression on TCP stream and TCP maerts, kernel-4.12.0-0.rc2

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Date:   Tue, 30 May 2017 18:27:43 -0700
From:   Alexander Duyck <alexander.duyck@...il.com>
To:     Adam Okuliar <aokuliar@...hat.com>,
        Mitch Williams <mitch.a.williams@...el.com>,
        intel-wired-lan <intel-wired-lan@...ts.osuosl.org>
Cc:     Netdev <netdev@...r.kernel.org>,
        Adrian Tomasov <atomasov@...hat.com>,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
        Otto Sabart <osabart@...hat.com>,
        Jirka Hladky <jhladky@...hat.com>
Subject: Re: [i40e] regression on TCP stream and TCP maerts, kernel-4.12.0-0.rc2

On Tue, May 30, 2017 at 8:41 AM, Alexander Duyck
<alexander.duyck@...il.com> wrote:
> On Tue, May 30, 2017 at 6:43 AM, Adam Okuliar <aokuliar@...hat.com> wrote:
>> Hello,
>>
>> we found regression on intel card(XL710) with i40e driver. Regression is
>> about ~45%
>> on TCP_STREAM and TCP_MAERTS test for IPv4 and IPv6. Regression was first
>> visible in kernel-4.12.0-0.rc1.
>>
>> More details about results you can see in uploaded images in bugzilla. [0]
>>
>>
>> [0] https://bugzilla.kernel.org/show_bug.cgi?id=195923
>>
>>
>> Best regards, / S pozdravom,
>>
>> Adrián Tomašov
>> Kernel Performance QE
>> atomasov@...hat.com
>
> I have added the i40e driver maintainer and the intel-wired-lan
> mailing list so that we can make are developers aware of the issue.
>
> Thanks.
>
> - Alex

Adam,

We are having some issues trying to reproduce what you reported.

Can you provide some additional data. Specifically we would be looking
for an "ethtool -i", and an "ethtool -S" for the port before and after
the test. If you can attach it to the bugzilla that would be
appreciated.

Thanks.

- Alex