linux-kernel - Re: [PATCH RFC net-next 00/20] net: dsa: add GRO support

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Date:   Mon, 13 Jan 2020 12:25:20 +0300
From:   Alexander Lobakin <alobakin@...nk.ru>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Edward Cree <ecree@...arflare.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Hauke Mehrtens <hauke@...ke-m.de>,
        Sean Wang <sean.wang@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Jiri Pirko <jiri@...lanox.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Taehee Yoo <ap420073@...il.com>,
        Stephen Hemminger <stephen@...workplumber.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Song Liu <songliubraving@...com>,
        Matteo Croce <mcroce@...hat.com>,
        Jakub Sitnicki <jakub@...udflare.com>,
        Paul Blakey <paulb@...lanox.com>,
        Yoshiki Komachi <komachi.yoshiki@...il.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH RFC net-next 00/20] net: dsa: add GRO support

Andrew Lunn wrote 30.12.2019 20:12:
>> I mark this as RFC, and there are the key questions for maintainers,
>> developers, users etc.:
>> - Do we need GRO support for DSA at all?
> 
>> - Does this series bring any performance improvements on the
>>   affected systems?
> 
> Hi Alexander

Hi,

> I think these are the two most important questions. Did you do any
> performance testing for the hardware you have?

Exactly, this are the top questions. I performed lots of tests on
hardware with which I'm working on and had a pretty good boosts
(I didn't mainlined my drivers yet unfortunately).
But this does not mean that GRO would be that nice for all kind of
devices *at all*. That's why I would like to see more test results
on different systems.

> I personally don't have any of the switches you have made
> modifications to, so i cannot test these patches. I might be able to
> add GRO to DSA and EDSA, where i can do some performance testing.
> 
>     Andrew

Regards,
ᚷ ᛖ ᚢ ᚦ ᚠ ᚱ