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From: Eric Dumazet <edumazet@google.com>
To: Jaroslav Pulchart <jaroslav.pulchart@gooddata.com>
Cc: netdev@vger.kernel.org, lixiaoyan@google.com, pabeni@redhat.com,
	davem@davemloft.net, Igor Raits <igor.raits@gooddata.com>
Subject: Re: Network performance regression with linux 6.1.y. Issue bisected to "5eddb24901ee49eee23c0bfce6af2e83fd5679bd" (gro: add support of (hw)gro packets to gro stack)
Date: Thu, 5 Jan 2023 18:43:13 +0100	[thread overview]
Message-ID: <CANn89iJFmfv569Mu7REiP5OBMscuv8EBSGJqi_7c4pxcJymrKw@mail.gmail.com> (raw)
In-Reply-To: <CAK8fFZ5pzMaw3U1KXgC_OK4shKGsN=HDcR62cfPOuL0umXE1Ww@mail.gmail.com>

On Thu, Jan 5, 2023 at 6:37 PM Jaroslav Pulchart
<jaroslav.pulchart@gooddata.com> wrote:
>
> Hello,
>
> I would like to report a 6.1,y regression in a network performance
> observed when using "git clone".
>
> BAD: "git clone" speed with kernel 6.1,y:
>    # git clone git@github.com:..../.....git
>    ...
>    Receiving objects:   8% (47797/571306), 20.69 MiB | 3.27 MiB/s
>
> GOOD: "git clone" speed with kernel 6.0,y:
>    # git clone git@github.com:..../.....git
>    ...
>    Receiving objects:  72% (411341/571306), 181.05 MiB | 60.27 MiB/s
>
> I bisected the issue to a commit
> 5eddb24901ee49eee23c0bfce6af2e83fd5679bd "gro: add support of (hw)gro
> packets to gro stack". Reverting it from 6.1.y branch makes the git
> clone fast like with 6.0.y.
>

Hmm, please provide more information.

NIC used ? (ethtool -i eth0)

ethtool -k eth0  # replace by your netdev name

And packet captures would be nice (with and without the patch)

Thanks.

  reply	other threads:[~2023-01-05 17:48 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-05 17:37 Network performance regression with linux 6.1.y. Issue bisected to "5eddb24901ee49eee23c0bfce6af2e83fd5679bd" (gro: add support of (hw)gro packets to gro stack) Jaroslav Pulchart
2023-01-05 17:43 ` Eric Dumazet [this message]
2023-01-05 17:54   ` Jaroslav Pulchart
2023-01-05 18:49     ` Eric Dumazet
2023-01-05 19:56       ` Jaroslav Pulchart
2023-01-06 14:04         ` Eric Dumazet
2023-01-06 15:04           ` Jaroslav Pulchart
2023-01-06  8:36 ` Linux kernel regression tracking (#adding)
2023-01-30 12:55   ` Linux kernel regression tracking (Thorsten Leemhuis)

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