netdev - Re: [PATCH v2 net-next 0/5] tcp: add 4 new stats

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Message-Id: <20180801.095630.2185828024414600638.davem@davemloft.net>
Date:   Wed, 01 Aug 2018 09:56:30 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     weiwan@...gle.com
Cc:     netdev@...r.kernel.org, edumazet@...gle.com, ncardwell@...gle.com,
        soheil@...gle.com, ycheng@...gle.com
Subject: Re: [PATCH v2 net-next 0/5] tcp: add 4 new stats 

From: Wei Wang <weiwan@...gle.com>
Date: Tue, 31 Jul 2018 17:46:19 -0700

> From: Wei Wang <weiwan@...gle.com>
> 
> This patch series adds 3 RFC4898 stats:
> 1. tcpEStatsPerfHCDataOctetsOut
> 2. tcpEStatsPerfOctetsRetrans
> 3. tcpEStatsStackDSACKDups
> and an addtional stat to record the number of data packet reordering
> events seen:
> 4. tcp_reord_seen
> 
> Together with the existing stats, application can use them to measure
> the retransmission rate in bytes, exclude spurious retransmissions
> reflected by DSACK, and keep track of the reordering events on live
> connections.
> In particular the networks with different MTUs make bytes-based loss stats
> more useful. Google servers have been using these stats for many years to
> instrument transport and network performance.
> 
> Note: The first patch is a refactor to add a helper to calculate
> opt_stats size in order to make later changes cleaner.

Series applied, thank you.