netdev - Re: [PATCH net-next 2/2] tcp: do not aggressively quick ack after ECN events

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Message-ID: <CACSApvYiF90axDXAKk7_z5LmfbvxORPR282Ltxj+sRAHWLy6xg@mail.gmail.com>
Date:   Tue, 22 May 2018 10:04:28 -0400
From:   Soheil Hassas Yeganeh <soheil@...gle.com>
To:     Eric Dumazet <edumazet@...gle.com>
Cc:     "David S . Miller" <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>, Van Jacobson <vanj@...gle.com>,
        Neal Cardwell <ncardwell@...gle.com>,
        Yuchung Cheng <ycheng@...gle.com>,
        Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: [PATCH net-next 2/2] tcp: do not aggressively quick ack after ECN events

On Mon, May 21, 2018 at 6:08 PM, Eric Dumazet <edumazet@...gle.com> wrote:
> ECN signals currently forces TCP to enter quickack mode for
> up to 16 (TCP_MAX_QUICKACKS) following incoming packets.
>
> We believe this is not needed, and only sending one immediate ack
> for the current packet should be enough.
>
> This should reduce the extra load noticed in DCTCP environments,
> after congestion events.
>
> This is part 2 of our effort to reduce pure ACK packets.
>
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Acked-by: Soheil Hassas Yeganeh <soheil@...gle.com>

Thanks for the patch!