netdev - Re: [PATCH net-next 0/6] tcp: remove non GSO code

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Message-ID: <CANn89iK1tTWqXmYZq67drQrJAwxA3UvKscbCpeJhB1hm-k5gmQ@mail.gmail.com>
Date:   Tue, 20 Feb 2018 11:56:24 -0800
From:   Eric Dumazet <edumazet@...gle.com>
To:     Oleksandr Natalenko <oleksandr@...alenko.name>
Cc:     Eric Dumazet <eric.dumazet@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>,
        Neal Cardwell <ncardwell@...gle.com>,
        Yuchung Cheng <ycheng@...gle.com>,
        Soheil Hassas Yeganeh <soheil@...gle.com>
Subject: Re: [PATCH net-next 0/6] tcp: remove non GSO code

On Tue, Feb 20, 2018 at 11:51 AM, Oleksandr Natalenko
<oleksandr@...alenko.name> wrote:
> On úterý 20. února 2018 20:39:49 CET Eric Dumazet wrote:
>> I am not trying to compare BBR and Reno on a lossless link.
>>
>> Reno is running as fast as possible and will win when bufferbloat is
>> not an issue.
>>
>> If bufferbloat is not an issue, simply use Reno and be happy ;)
>>
>> My patch helps BBR only, I thought it was obvious ;)
>
> Umm, yes, and my point was rather something like "the speed on a lossless link
> while using BBR with and without this patch is the same". Sorry for a
> confusion. I guess, the key word here is "lossless".

That is with the other patches _not_ applied ?

Here the gain is quite big, since BBR can setup a slightly better
cwnd, allowing proper GRO on receiver.