netdev - Re: [BUG,REGRESSION?] 3.11.6+,3.12: GbE iface rate drops to few KB/s

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Message-Id: <20131120.135221.974195642039657856.davem@davemloft.net>
Date:	Wed, 20 Nov 2013 13:52:21 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	w@....eu, arno@...isbad.org, xiyou.wangcong@...il.com,
	edumazet@...gle.com, linux-arm-kernel@...ts.infradead.org,
	netdev@...r.kernel.org, thomas.petazzoni@...e-electrons.com
Subject: Re: [BUG,REGRESSION?] 3.11.6+,3.12: GbE iface rate drops to few
 KB/s

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Wed, 20 Nov 2013 09:30:07 -0800

> max (128KB , 1-2 ms) of buffering per flow should be enough to reach
> line rate, even for a single flow, but this means the sk_sndbuf value
> for the socket must take into account the pipe size _plus_ 1ms of
> buffering.

And we can implement this using the estimated pacing rate.
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