netdev - Re: Network performance regression with linux 6.1.y. Issue bisected to "5eddb24901ee49eee23c0bfce6af2e83fd5679bd" (gro: add support of (hw)gro packets to gro stack)

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Date:   Mon, 30 Jan 2023 13:55:57 +0100
From:   "Linux kernel regression tracking (Thorsten Leemhuis)" 
        <regressions@...mhuis.info>
To:     Jaroslav Pulchart <jaroslav.pulchart@...ddata.com>,
        edumazet@...gle.com, netdev@...r.kernel.org, lixiaoyan@...gle.com,
        pabeni@...hat.com, davem@...emloft.net,
        "regressions@...ts.linux.dev" <regressions@...ts.linux.dev>
Cc:     Igor Raits <igor.raits@...ddata.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)

[TLDR: This mail in primarily relevant for Linux kernel regression
tracking. See link in footer if these mails annoy you.]

On 06.01.23 09:36, Linux kernel regression tracking (#adding) wrote:

> On 05.01.23 18:37, Jaroslav Pulchart 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@...hub.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@...hub.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.
> 
> Thanks for the report. To be sure the issue doesn't fall through the
> cracks unnoticed, I'm adding it to regzbot, the Linux kernel regression
> tracking bot:
> 
> #regzbot ^introduced 5eddb24901ee49eee23c0bfce6af2e83fd5679bd
> #regzbot title net: gro: Network performance regressed
> #regzbot ignore-activity

#regzbot fix: 7871f54e3dee

Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
--
Everything you wanna know about Linux kernel regression tracking:
https://linux-regtracking.leemhuis.info/about/#tldr
That page also explains what to do if mails like this annoy you.

#regzbot ignore-activity