netdev - Re: [PATCH] tcp: add tsval and tsecr to TCP

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Message-ID: <025bcf1e-b7d4-5fa2-ec68-074c62b9d63c@gmail.com>
Date:   Wed, 2 Oct 2019 15:33:36 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     William Dauchy <wdauchy@...il.com>, netdev@...r.kernel.org
Cc:     davem@...emloft.net
Subject: Re: [PATCH] tcp: add tsval and tsecr to TCP_INFO



On 10/2/19 3:10 PM, William Dauchy wrote:
> tsval and tsecr are useful in some cases to diagnose TCP issues from the
> sender point of view where unexplained RTT values are seen. Getting the
> the timestamps from both ends will help understand those issues more
> easily.
> 

Reporting the last recorded values is really not good,
a packet capture will give you all this information in a non
racy way.