netdev - Re: [RFC net-next 0/6] tcp: remove prequeue and header prediction

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Message-ID: <CANn89i+m4gSTevvMJMt_qOF7Q-ugqLm-jNh+2aKZDSXWR48Ouw@mail.gmail.com>
Date:   Mon, 31 Jul 2017 13:22:22 -0700
From:   Eric Dumazet <edumazet@...gle.com>
To:     Yuchung Cheng <ycheng@...gle.com>
Cc:     Neal Cardwell <ncardwell@...gle.com>,
        Florian Westphal <fw@...len.de>,
        Netdev <netdev@...r.kernel.org>,
        Soheil Hassas Yeganeh <soheil@...gle.com>,
        Wei Wang <weiwan@...gle.com>, Lawrence Brakmo <brakmo@...com>,
        David Miller <davem@...emloft.net>,
        Lorenzo Colitti <lorenzo@...gle.com>,
        Van Jacobson <vanj@...gle.com>
Subject: Re: [RFC net-next 0/6] tcp: remove prequeue and header prediction

On Mon, Jul 31, 2017 at 1:04 PM, Yuchung Cheng <ycheng@...gle.com> wrote:
> by the time these devices use 4.12 kernels they are likely powerful
> enough to make header prediction irrelevant...

Also note that TCP stack complexity has increased a lot, I seriously
doubt anyone could notice any difference.

On small devices, the major cost is the wakeup of the cpu to process
one frame before going back to idle...