netdev - Re: [Patch net-next] tcp: add a tracepoint for tcp_retransmit

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Date:   Tue, 10 Oct 2017 04:21:09 -0700
From:   Eric Dumazet <edumazet@...gle.com>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     netdev <netdev@...r.kernel.org>, Yuchung Cheng <ycheng@...gle.com>,
        Neal Cardwell <ncardwell@...gle.com>
Subject: Re: [Patch net-next] tcp: add a tracepoint for tcp_retransmit_skb()

On Mon, Oct 9, 2017 at 10:35 PM, Cong Wang <xiyou.wangcong@...il.com> wrote:
> We need a real-time notification for tcp retransmission
> for monitoring.

Hi Cong

This seems to not be well defined.

For example, why a retransmission triggered by TLP is not traced ?